Article
Materials Science, Multidisciplinary
Farooq Aslam, Guanghao Qu, Yang Feng, Shengtao Li
Summary: The interfacial region between the polymeric matrix and nanofiller is crucial in determining the electrical insulation properties of nanocomposites. This study investigates the effects of incorporating different types of polyhedral oligomeric silsesquioxane (POSS) into epoxy (EP) on the interfacial traps and breakdown strength. It is found that adding acryloxypropyl POSS (AP-POSS) improves the breakdown strength compared to both pristine EP and octaphenyl POSS (OP-POSS). Molecular simulation and experiments reveal that the compatibility between EP/POSS and trap depth depends on the interfacial interaction energy and crosslinking density. The side groups of AP-POSS have a larger number of localized energy states and higher electron affinity (EA), which can tailor deeper traps and restrict the mobility of electrons in EP/AP-POSS. The interfacial compatibility of POSS side groups with EP tunes the interfacial traps and dielectric characteristics.
ORGANIC ELECTRONICS
(2023)
Article
Chemistry, Physical
Wenfu Wei, Qianhua Liao, Zefeng Yang, Xiaobo Li, Zhanglin Huang, Junwen Ren, Yan Yang, Guangning Wu
Summary: In this study, an interlayer of silicon carbide and aluminum-silicon alloy was constructed at the interfaces of carbon matrix and aluminum to overcome the bottleneck problem of performance improvement in carbon/aluminum composites. The constructed interlayer significantly improved the wettability of the carbon matrix and aluminum melt, resulting in enhanced compressive strength, flexural strength, and electrical conductivity of the composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Materials Science, Composites
Ziang Jin, Zhenyu Han, Cheng Chang, Shouzheng Sun, Hongya Fu
Summary: This paper reviews the methods for improving the interlaminar mechanical properties of thermoplastic composites from two perspectives and provides detailed introduction on fiber surface modification methods and different forming technologies. The advantages and disadvantages of each method are analyzed, and future research directions are prospectively discussed.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Characterization & Testing
Wenchao Zhang, Min Jiang, Feng Guan, Shiyu Liu, Liangjun Wang, Yanpeng Li, Dong Yue, Jialong Li, Xiaoxu Liu, Yu Feng
Summary: In this study, high-temperature sintering was used to substitue Al3+ for Si4+ in SiO2 to create hole traps, resulting in acceptor-doped fillers Si1-0.75xAlxO2 (SA (x mol%)). Polyimide (PI) dielectric materials containing these SA fillers with different contents were synthesized through in-situ polymerization. The hole traps in the fillers modulated the electrical behavior of the polymer dielectric, significantly increasing the dielectric constant and breakdown strength by modulating the polarization behavior and capture carriers. The dielectric constant of the 1.25 vol% SA (1.5 mol%)/PI composite reached 3.60 at 1 Hz, while the breakdown strength E-b reached 581.5 kV/mm. This work provides a new synthesis strategy for achieving high insulation and high polarization in polymer dielectrics simultaneously.
Article
Materials Science, Textiles
Wuzhou Li, Liangang Zheng, Defang Teng, Dongsheng Ge, Farial Farha, Fujun Xu
Summary: Wheat, as an important agricultural crop, often results in waste and pollution due to the improper utilization of its straw resources. In this study, a thermal compression method was used to prepare biodegradable composites by reinforcing polylactic acid resin with intact wheat straw as a filler. The compressed wheat straw showed higher tensile strength, and the modified composite materials exhibited significantly enhanced mechanical properties.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Materials Science, Multidisciplinary
Pengfei Li, Rong Shi, Peize Lin, Xinguo Ren
Summary: Plasmon excitations in graphene, silicene, and germanene were investigated using linear-response time-dependent density functional theory within the random phase approximation. The study examined the plasmon dispersion and lifetime for both extrinsic and intrinsic plasmons in these materials. The properties of extrinsic plasmons were found to be closely related to Landau damping, with the plasmon dispersion showing different behaviors and lifetimes in regions with and without single-particle excitations. In addition, the plasmon dispersion of intrinsic plasmons in silicene and germanene exhibited a two-peak structure, attributed to the complex band structure of these materials.
Article
Chemistry, Physical
Lihua Lyu, Fangfang Wen, Tingting Lyu, Xinghai Zhou, Yuan Gao
Summary: To improve the interfacial properties, 3D orthogonal woven fabrics made of basalt filament yarns were modified with carboxylated carbon nanotubes (KH570-MWCNTs) and polydopamine (PDA). The modified fabrics showed enhanced bending properties, with maximum bending loads increased by 31.5% and 31.0%. Finite element analysis and experimental testing confirmed the accuracy of the simulation results, demonstrating the material's damage situation and mechanism during the bending process.
Article
Chemistry, Physical
Sihai Lv, Yongzhi Cheng, Fu Chen, Xiangcheng Li, Hui Luo
Summary: This study proposes the incorporation of manganese oxide into carbon matrix magnetic composites to enhance the electromagnetic wave (EMW) absorption properties. Multiple interfacial ternary-component Fe3C/MnO/Nitrogen-doped carbon (NC) absorbers were synthesized through facile hydrothermal, oxidative polymerization, and carbothermal reduction processes. The designed composites exhibit excellent EMW absorption properties, with an effective absorption bandwidth of 4.88 GHz (13.12-18 GHz) at a mere thickness of 1.5 mm. The outstanding performance of EMW absorption can be attributed to effective modulation of electromagnetic parameters through a large number of heterogeneous interfaces, defects, and magnetic loss. Meanwhile, adjusting the filling ratios of the composites in the absorber can significantly adjust the electromagnetic parameters of the samples. This work presents an effective approach for the preparation of high-performance EMW absorbers with ternary components, as well as a strategy for developing novel broadband absorbers that are lightweight and have thin thickness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Construction & Building Technology
Dong Lu, Xianming Shi, Jing Zhong
Summary: This study demonstrates a low-cost, simple, and targeted approach to improve the interfacial transition zone (ITZ) of cement mortar and concrete using sand particles pre-saturated in a graphene oxide dispersion. The use of this approach significantly increased compressive and flexural strengths, reduced porosity, and enhanced hydration product formation in the ITZ region.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Multidisciplinary Sciences
Yufei Wang, Zhengzhi Mu, Zhiyan Zhang, Wenda Song, Shuang Zhang, Handong Hu, Zhe Ma, Liewei Huang, Dashun Zhang, Ze Wang, Yujiao Li, Binjie Zhang, Bo Li, Junqiu Zhang, Shichao Niu, Zhiwu Han, Luquan Ren
Summary: In this study, a biomimetic design strategy inspired by the wing feathers of the Black Kite was proposed to enhance the mechanical properties of carbon fiber-reinforced composites (CFRCs). The natural hook-groove microstructure system (HGMS) and mechanical interlocking mechanism were carefully investigated and successfully incorporated into CFRCs. Experimental results demonstrated significant improvements in flexural strength and interlaminar shear strength of the bioinspired CFRCs.
Article
Polymer Science
Shuyan Gao, Hang Zhao, Na Zhang, Jinbo Bai
Summary: The study focused on enhancing the electromechanical actuated properties of TiO2@SiO2/PDMS nanocomposites by fabricating core-shell TiO2@SiO2 nanoparticles. The addition of TiO2@SiO2 at a low electric field led to a significantly improved in-plane actuated strain, promising for designing novel composites with advanced low-field actuated electromechanical properties in next generation DE systems.
Article
Materials Science, Ceramics
Muhammad Zeshan, Mahmood Ali, Meznah M. Alanazi, ShaimaaA. M. Abdelmohsen, Rabia Yasmin Khosa, Abdullah G. Al-Sehemi, Mohd Zahid Ansari, Roaa A. Tayeb, Hafiz Muhammad Tahir Farid, Mohammed M. Rahman
Summary: High-frequency nanocomposites, consisting of ferrite and a polyaniline matrix, have become the focus of electronic and telecommunication technologies. The addition of spinel ferrite to the nanocomposites through sol-gel technique and in-situ synthesis improved their crystallite size and reduced the dielectric constants and dielectric loss. The composite materials also exhibited ferromagnetic characteristics and enhanced resistivity and activation energies.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
D. K. Chudasama, V. G. Shrimali, Sangita Chavda, Payal Joshi, Urvashi Jambukiya, V. S. Vadgama, Davit Dhruv, P. S. Solanki, A. D. Joshi, N. . A. Shah, D. D. Pandya
Summary: Multiple studies have reported on the structural, magnetic, and electrical properties of BiFeO3-Al2O3 nanocomposites prepared using the sol-gel method. The results showed that the composites had a bi-phase structure with the presence of impurity phases. The addition of Al2O3 nanoparticles led to a decrease in the dielectric constant, loss tangent, and ac conductivity. The electrical measurements followed Jonscher's universal power law and were dominated by the correlated barrier hopping mechanism.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Lalit M. Pandey
Summary: The review discusses the importance of surface modifications of nanomaterials for adsorbent applications, highlighting strategies for surface modification through SAMs and their effects on the surface properties of nanomaterials. Additionally, the statistical relationship between various factors and the adsorption capacity of heavy metals, as well as the affinity of functional groups towards metal ions, are summarized.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Nan Zhou, Jin Jia, Shuyuan Zhao, Dongxing Zhang, Mingxiang Feng
Summary: The surface of carbon fibers is modified by a sizing agent composed of sulfonated polyether ether ketone (SPEEK) and carboxylated carbon nanotubes (MWCNTS), which improves the interfacial binding between carbon fibers and polyetheretherketone (PEEK) matrix. The flexural strength and interlaminar shear strength of the modified composites are significantly enhanced by 74.2% and 84.2% compared to CF/PEEK composites without sizing agent. Coating with SPEEK-MWCNTS is confirmed to be an essential approach to construct an excellent interface between the reinforcement phase and thermoplastic matrix.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Chemical
Yijia Fu, Wendong Li, Man Xu, Chao Wang, Liyuan Zhang, Guanjun Zhang
Summary: This study investigates the preparation of high-permittivity composite materials using the stereolithographic 3D-printing technique and explores the factors that affect the properties of these materials.
ADVANCES IN POLYMER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Xiong Yang, Guangyu Sun, Rundong Zhou, Kun Huang, Wendong Li, Chao Wang, Jiufeng Dong, Baipeng Song, Guanjun Zhang
Summary: In this study, a facile ion-exchange technique was used to fabricate a nanoscale polyimide/chromic oxide (PI/Cr2O3) nanocomposite coating with ultralow secondary electron emission yields (SEEY). The introduction of weakly emissive Cr2O3 nanoparticles and interfacial traps significantly improved the flashover strength of the coating while maintaining sufficient mechanical durability.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Chao Wang, Wen-Dong Li, Peng Sun, Yu-Cheng Zhang, Kai-Ying Ge, Jun-Bo Deng, Guan-Jun Zhang, Wen-Qiang Li, Rui-Lei Gong
Summary: A construction strategy of dielectrically graded insulation for gas-insulated equipment was studied. The electric field distribution of a 126-kV disk-type spacer was optimized using a topology optimization method, and the spatial distribution of relative permittivity was designed to improve the electric field distribution. A three-layer dielectrically graded spacer was constructed, and the electric field distribution was significantly improved compared to a homogeneous spacer.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2022)
Article
Physics, Applied
Junhong Chen, Peng Sun, Jinshu Li, Wendong Li, Yuan Li, Junbo Deng, Shengchang Ji, Guan-Jun Zhang
Summary: This study investigates the surface discharge pattern of C4F7N/CO2 mixture under negative impulse voltages and finds that the structure and propagation pattern of the surface discharge show no significant difference in mixtures with different ratios and SF6. These results contribute to a better understanding of the surface discharge phenomenon and insulation characteristics of C4F7N/CO2 mixture.
APPLIED PHYSICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Wen-Dong Li, Chao Wang, Yu-Cheng Zhang, Zhi-Hui Jiang, Jun-Bo Deng, Guan-Jun Zhang
Summary: This study developed a convenient and scalable method for fabricating surface functionally graded material (SFGM) using UV curable coating, which showed simplified processing, high flashover voltage, and strong adhesion. The UV-SFGM exhibited good insulation performance and long-term stability, making it promising for industrial applications.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2023)
Article
Engineering, Electrical & Electronic
Yu-Cheng Zhang, Wen-Dong Li, Chao Wang, Jin-Shu Li, Peng Sun, Jun-Bo Deng, Guan-Jun Zhang
Summary: This article investigates the suitability of several thermoplastic alternatives in support insulators and selects a best material for future research. Among several typical thermoplastics, polycarbonate (PC) shows the best performance in terms of electrical conductivity and broadband dielectric spectra, with lower conductivity, lower dielectric loss, and less temperature and field dependence, making it a potential, environmental friendly replacement for epoxy resin.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2023)
Article
Engineering, Electrical & Electronic
Huanmin Yao, Haibao Mu, Wendong Li, Daning Zhang, Haoxiang Zhao, Chao Wang, Guanjun Zhang
Summary: Dielectrically graded insulation (DGI) with spatially inhomogeneous dielectric parameter distribution can improve insulation performance for high-voltage power equipment. However, existing methods for optimizing DGI suffer from poor calculation efficiency, suboptimal electric field results, and high dielectric loss. In this study, a new efficient DGI parameter optimization method was proposed and demonstrated to significantly improve electric field uniformity and reduce dielectric loss. The results suggest that the proposed method offers a promising approach for the preparation and application of DGI.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2023)
Article
Physics, Applied
Yuhao Sun, Bo Zhang, Hang Zhao, Wenhu Han, Wendong Li, Guanjun Zhang
Summary: Flexible plasma sources based on printed circuit boards are adaptable to irregular surfaces and provide advantages in material processing and biomedical treatment. This study investigates a flexible plasma sheet and its surface discharge characteristics using experiments and simulations. The results show the generation of positive and negative discharges and the propagation of surface ionization waves (SIWs) in a petal-like pattern controlled by electron collision reactions. Additionally, changes in convex and concave plasma sheet surfaces affect electron density and temperature, while the SIW patterns remain consistent.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Review
Physics, Applied
Wendong Li, Yucheng Zhang, Xin Zhao, Ruixuan Liu, Hechen Liu, Zhengyong Huang, Guanjun Zhang
Summary: This paper reviews the current progress of eco-friendly upgrade in each lifecycle stages of polymeric insulating materials, and summarizes a series of interesting and fundamental results. Drawbacks of the current researches are discussed, and outlooks are provided for the future development of eco-friendly polymeric insulating materials.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Xiong Yang, Guangyu Sun, Baipeng Song, Wenhu Han, Chao Wang, Wendong Li, Shu Zhang, Falun Song, Fangzheng Zou, Guanjun Zhang
Summary: A 3D-printed insulation structure with a millimeter-scale surface cavity covered by periodic through-pore array is designed to improve the vacuum surface insulation, effectively suppressing multipactor phenomena and improving the flashover threshold compared to conventional mitigation strategies. Experiments and simulations show that electrons in the multipactor region pass through the pores and are unlikely to escape from the cavity, thereby no longer participating in the above-surface multipactor process and eventually improving the flashover threshold. This approach provides new inspiration for the design of advanced insulators with ultra-high electrical withstanding capability and brings new insights into relevant industrial applications.
Article
Engineering, Environmental
Yu-Cheng Zhang, Wen-Dong Li, Xin Zhao, Fan-Bo Meng, Peng Sun, Chao Wang, Guang-Zhi Guo, Wen-Rui Li, Guan-Jun Zhang
Summary: In this study, a new epoxy-based high-k composite vitrimer was developed with low tano, high Eb and excellent repairability by introducing dynamic disulfide bonds and modified nanoparticle fillers. The composite material can repair both mechanical and electrical damages, achieving over 94% insulation strength. This study provides a new reference method for the preparation of low tano, high Eb and repairable high-k polymer-matrix composites.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Physics, Fluids & Plasmas
Bo Zhang, Yuhao Sun, Wenhu Han, Lei Fan, Wang Guo, Wendong Li, Haibao Mu, Guanjun Zhang
Summary: Plasma jet arrays, a flexible tool to generate large-scale non-thermal plasma, have attracted academic attention from multiple fields. This study focuses on the surface charge evolution in quartz dielectric deposited by plasma jet arrays. The results show that the fusion of surface charges is enhanced when more charges are transported onto targeted dielectrics, especially at smaller separations. In situ measurements of surface charges and corresponding simulations provide fresh insight into the electrical interaction in large-scale atmospheric-pressure plasma jets.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Polymer Science
Shiyin Zeng, Wendong Li, Yanan Peng, Yucheng Zhang, Guanjun Zhang
Summary: The aging mechanism of high-temperature vulcanized silicone rubber (HTV-SR) in composite insulators under a complex environment was systematically investigated. It was found that the aging degree of HTV-SR is correlated to the range of temperature cycling, which affects its crosslinking degradation and overall performance. This study provides valuable insights into the aging behavior of HTV-SR and contributes to its further improvement.
Proceedings Paper
Energy & Fuels
Shubing Zeng, Wendong Li, Wenfeng Chen, Pengpeng Ju, Zhenyou Zhang, Panfeng Zhang
Summary: There is a significant challenge regarding flow assurance at the choke for high-pressure and low-temperature conditions. Analyzing and determining the subcooling degree and existence time of hydrate risk at the choke is crucial for hydrate management. This study analyzed the hydrate risk during low production and restart processes at the choke, and calculated the subcooling degree and existence time of hydrate risk. The results show that there is always hydrate risk at the upstream and downstream of the choke during the early stage of low production with high reservoir pressure. The subcooling degree gradually decreases with increasing gas production, and there is no risk of hydrate formation at the upstream and downstream when the gas production is sufficiently high. During the restart process, the maximum subcooling degree at the downstream of the choke is 33.25 degrees C, and the hydrate risk duration is 102 min.
PROCEEDINGS OF THE 3RD INTERNATIONAL SYMPOSIUM ON NEW ENERGY AND ELECTRICAL TECHNOLOGY
(2023)
Article
Computer Science, Information Systems
Chao Gao, Yanan Peng, Shiyao Zhang, Bo Zhang, Wendong Li, Lee Li
Summary: This study investigates the mechanism and process of degradation in HTV shed and FRP core rod of composite insulators caused by internal discharges. The research finds that cavities and air holes generated during manufacturing lead to electrical field distortion and act as the origin of discharges. The decomposition of polydimethylsiloxane results in hardened and chalking HTV shed, while the adhesive in the rod-housing interface and epoxy resin in the core rod fail and decompose during operation.
Article
Engineering, Multidisciplinary
Keyu Zhu, Xitao Zheng, Jing Peng, Jiaming Sun, Ruilin Huang, Leilei Yan
Summary: This paper discusses the influence of multiple impacts on the compression strength of honeycomb sandwich structures with composite face sheets. It is found that the size of the impactor affects the turning point of the compression strength. Additionally, high impact energy leads to damage in the bottom face sheet and reduces the overall compression strength.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Danqian Wang, Yanfei Yue, Jueshi Qian
Summary: Magnesium Potassium Phosphate Cement (MKPC) as a binder for steel rebars shows improved corrosion resistance when subjected to carbonation, due to the increase in pH and the formation of a more protective oxide film.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Zhibin Li, Wenyu Wang, Pengcheng Xue, Xingyu Wei, Jian Xiong
Summary: This work proposes a design approach and manufacturing method for carbon fiber reinforced plastic (CFRP) corrugated sandwich truncated cones (CSTC) to improve their anti-debonding ability and ensure reliability. The study establishes theoretical models for CSTCs' stiffness and failure modes, which are verified through experiments and finite element analysis (FEA). The research reveals the effect of geometric parameters on failure modes and performs an optimal design for CSTC structures. The findings have significant implications for the design and application of lightweight CSTCs in constructions, such as launch vehicle adapters.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mingyu Zhang, Lei Chu, Jiahua Chen, Fuxun Qi, Xiaoyan Li, Xinliang Chen, Deng-Guang Yu
Summary: This review summarizes the different structures and construction methods of fibrous membranes with asymmetric wettability. It also reviews the biological applications of these membranes and suggests future challenges.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
E. Mofakhami, L. Gervat, B. Fayolle, G. Miquelard-Garnier, C. Ovalle, L. Laiarinandrasana
Summary: This study investigates the effects of fibre concentration on the mechanical response of welded glass-fibre-reinforced polypropylene (GF-PP). Experimental observations reveal a significant reduction in weld ratio, up to 60%, indicating a decreased strength compared to the bulk material. Increasing fibre content in the welded material results in a decrease in stress at break and strain at the maximum stress. The use of DIC technique and X-ray microtomography further confirms the localized strain amplification in the welded zone due to the significant increase in fibre density.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Emad Pourahmadi, Farjad Shadmehri, Rajamohan Ganesan
Summary: This research compares the mechanical properties of laminates manufactured using automated fiber placement and conventional autoclave curing methods. The results show that laminates manufactured using automated fiber placement have a lower interlaminar shear strength compared to laminates reconsolidated using autoclave curing. A finite element simulation method is proposed to quantitatively analyze these differences.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Johnny Jakobsen, Benny Endelt, Fahimeh Shakibapour
Summary: This study proposes a new bolted/pinned joining method for composite applications, which improves load transfer by introducing a patch-type reinforcement. Experimental results demonstrate significant improvements in both static and fatigue load conditions compared to existing methods. Finite element simulations highlight the advantage of this method, as it creates a more efficient load-transferring mechanism through different stress distributions.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Gisele G. Cintra, Janine D. Vieira, Daniel C. T. Cardoso, Thomas Keller
Summary: This paper proposes a novel approach to assess multi-crack behavior in layered fiber-polymer composites. The generated Compliance and R-curves provide useful insights into understanding the multiple delamination process and allow for separate evaluation of strain energy release rate (SERR) for each crack. The developed cohesive zone model successfully simulates the failure process zone of three parallel cracks, showing good agreement between the numerical model and experimental results.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Renil Thomas Kidangan, Sreedhar Unnikrishnakurup, C. Krishnamurthy, Krishnan Balasubramaniam
Summary: The induction heating process can accurately identify fiber orientation and stacking order, making it a valuable tool for large-area inspection and quality control in manufacturing fiber-reinforced composites.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Sungjun Hwang, Yousoo Han, Douglas J. Gardner
Summary: Bleached Kraft pulp, unbleached Kraft pulp, and old corrugated cardboard pulp are suitable for producing cellulose nanofibril suspensions. Spray drying is a fast, simple, cost-effective, and scalable drying method. Spray-dried cellulose nanofibrils can be used as reinforcing materials in polypropylene matrices. The particle size of cellulose nanofibrils affects the material properties.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mehdi Mahdavi, Abbas Zolfaghari
Summary: This study aims to improve the recovery forces of shape memory polymers (SMPs) through material extrusion additive manufacturing. By using glass fiber (GF) as reinforcement and manufacturing multi-layer composite specimens, it was found that PLA with 6.62% GF exhibited the best recovery force, which was further optimized through annealing heat treatment.
COMPOSITES PART B-ENGINEERING
(2024)
Review
Engineering, Multidisciplinary
Xiang Ao, Antonio Vazquez-Lopez, Davide Mocerino, Carlos Gonzalez, De-Yi Wang
Summary: The vulnerability of natural fibers to heat and fire poses a significant challenge for their substitution of traditional fiber reinforcements in composite materials. Natural fiber/polymer composites (NFCs) are regarded as potential candidates for engineering applications due to their environmental friendliness and low-impact sourcing. Thus, appropriate approaches need to be implemented to enhance the fire safety of NFCs. This review summarizes and discusses the latest understanding of flammability and thermal properties of natural fibers, with a special focus on their interaction with polymer matrix in fire behavior. Additionally, the latest developments in flame-retardant approaches for NFCs are reviewed, covering both flame retardancy and fire structural integrity. Finally, future prospects and perspectives on fire safety of NFCs are proposed, providing insights into further advancements of NFCs.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Cheng Wang, Siqi Huo, Guofeng Ye, Bingtao Wang, Zhenghong Guo, Qi Zhang, Pingan Song, Hao Wang, Zhitian Liu
Summary: The demand for multifunctional, transparent epoxy resin with superior dielectric, mechanical, and fire-safety performances is increasing in modern industries. Researchers have developed an epoxidized, phosphaphenanthrene-containing poly(styrene butadiene styrene) (ESD) for advanced fire-safe epoxy resin, which maintains high transparency and improves UV-blocking property. The addition of 10 wt% ESD results in improved mechanical properties, decreased dielectric constant and loss, and outperformance compared to other fire-safe epoxy resins. This research provides an effective method for developing multifunctional flame-retardant epoxy resin.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Bo Pang, Heping Zheng, Zuquan Jin, Dongshuai Hou, Yunsheng Zhang, Xiaoyun Song, Yanan Sun, Zhiyong Liu, Wei She, Lin Yang, Mengyuan Li
Summary: This study develops an internal superhydrophobic material (ISM) using waste denitrification fly ash, which maintains stable hydrophobicity under harsh conditions of use and does not rely on expensive fluor-based surface modifications. The synthesized ISM has excellent matrix strength, strong waterproof properties, and retains superhydrophobicity even at damaged or friction interfaces.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Meirbek Mussatayev, Qiuji Yi, Mark Fitzgerald, Vincent K. Maes, Paul Wilcox, Robert Hughes
Summary: Real-time monitoring of carbon fibre composites during Automated Fibre Placement (AFP) manufacturing remains a challenge for non-destructive evaluation (NDE) techniques. This study designed a directional eddy-current (EC) probe to evaluate the detectability of out-of-plane wrinkles. Experimental evaluations and finite element modeling were conducted to better understand the relationship between eddy-current density and defect detection. The findings suggest that the probe configuration with an asymmetric driver coil and differential pickup coils shows the best capability for wrinkle detection.
COMPOSITES PART B-ENGINEERING
(2024)