Article
Biochemistry & Molecular Biology
Jixuan Wei, Chunxia Zhao, Zhaorun Hou, Yuntao Li, Hui Li, Dong Xiang, Yuanpeng Wu, Yusheng Que
Summary: In this study, poly(vinyl alcohol) composite aerogels (PVA/PCF/alpha-ZrP) with excellent flame retardancy were synthesized using exfoliated alpha-zirconium phosphate and phosphated cellulose through the multi-directional freezing method. The composite aerogel showed significantly reduced peak heat release rate, total smoke release, and CO production compared to pure PVA aerogel, while the limiting oxygen index value was improved. The flame retardancy mechanism involved crosslinking and carbonization of PVA chains promoted by PCF and alpha-ZrP, forming a barrier and reducing the emissions of combustible toxic gases.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Deng Duan, Xiangdong Gao, Yubing Dong, Xiaoming Qi, Xingxing Zhang, M. D. Zahidul Islam, Yongqing Wu, Xiang Zhao, Xiaomin Li
Summary: Silica aerogel/poly(vinyl alcohol) (PSG) composites were developed with excellent performance. The composites have a uniform distribution of nanopores, exhibit excellent mechanical strength under multiple compressive cycles, and demonstrate thermal insulation, flame retardant, and hydrophobic properties. This study provides a purely green method for industrial applications.
ACS APPLIED POLYMER MATERIALS
(2022)
Review
Chemistry, Analytical
Xuanye Wang, Guochao Yang, Hongwu Guo
Summary: One of the urgent issues in fire safety is the sustainable flame retardancy of polymer materials. Biobased flame retardants, such as tannic acid (TA), have shown great potential for flame retardancy in recent years. This paper reviews the physicochemical and thermal properties of TA, as well as its flame retardancy mechanism when added to common polymeric materials. The achievements in this field have increased our knowledge and spurred the development of biobased flame retardants.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Polymer Science
Siyu Hao, Dong Feng, Feng Wu, Yuhui Xie, Zhiyong Xu, Wenbo Zhao, Delong Xie
Summary: Preparation of transparent flame retardant polymer composites is always a challenging task. In this study, a biodegradable carbon dioxide derived copolymer, polypropylene carbonate (PPC), was chosen for its importance in human environmental protection. By utilizing intermolecular hydrogen bonds, PPC composites were obtained by incorporating polylactic acid (PLA) and flame retardant guanidine phosphate (GP). The results showed that GP contributed to the composites with enhanced glass transition temperature (Tg) and flame-retardant properties, without sacrificing the intrinsic transparency of PPC. This study provides a facile approach to overcome the limitations of PPC for advanced applications.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Nanoscience & Nanotechnology
Tongrui Zhang, Shulong Zeng, Hao Jiang, Zeshan Li, Dongyu Bai, Yijun Li, Jianjun Li
Summary: By combining leather solid waste with poly(vinyl alcohol) and polyaniline, a new aerogel with high mechanical strength, flame retardancy, and EMI shielding performance was successfully prepared. The exposure of amino carboxyl groups through solid-state shear milling technology enhanced hydrogen bonding interactions, while the nitrogen elements in the waste contributed to flame retardancy. Additionally, a conductive polyaniline layer was polymerized on the surface, leading to impressive EMI shielding capabilities.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Biochemistry & Molecular Biology
Ping Wang, Zhenfeng Wang, Tong Yan, Liyuan Yang, Li Yang, Jiacheng Ling, Shaojie Feng, Pei Xu, Yunsheng Ding
Summary: Multifunctional composites containing multi-walled carbon nanotubes (CNTs), ammonium polyphosphate (APP), and a commercial multifunctional epoxy oligomer (MEO) as chain extender were prepared via melt blending to improve both the mechanical and flame retardant properties of polylactide/poly(butylene adipate-co-terephthalate) (PLA/PBAT) composites. The addition of 6% CNTs and 10% APP in the PLA5-PBAT5/10A/6C composite resulted in optimal flame retardant properties, with a limited oxygen index of 28.3%, decreased peak heat release rate (pHRR) of 368 kJ/m(2), and total heat release (THR) of 72 MJ/m(2). The co-continuous phases in the composite also improved its mechanical properties compared to PLA8-PBAT2 composites.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Materials Science, Multidisciplinary
Shansu Li, Wenjing Mo, Yuan Liu, Qi Wang
Summary: This study proposes a facile strategy for fabricating a hybrid foam with low thermal conductivity, excellent flame retardancy, and outstanding thermal insulation performance. The hybrid foam shows improved tensile and compression strength. It achieves a V-0 rating in the vertical burning test and significantly reduces total heat release and smoke release with the addition of guanidine phosphate (GP). The hybrid foam has potential applications in both military and civilian fields.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Applied
Xiaojiong Zhao, Ziwei Liang, Yubin Huang, Yu Hai, Xiaodi Zhong, Shu Xiao, Saihua Jiang
Summary: The article presents an environmentally friendly PVA/PA hydrogel coating method to enhance the flame retardancy of wood by freeze-thaw cycles, showing better adhesion and fire-retardant properties compared to pure PVA hydrogel coating. This coating is suitable for a wide range of applications in the construction and furniture industries.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Chemistry, Multidisciplinary
X. G. Wang, P. Qi, S. J. Zhang, S. L. Jiang, Y. C. Li, J. Sun, B. Fei, X. Y. Gu, S. Zhang
Summary: This work presents a strategy to enhance the flame-retardant efficiency of metal organic frameworks (MOFs) by encapsulating triethyl phosphate (TEP) into a zirconium-based MOF (UiO66-NH2). The resulting UiO@TEPx compound flame retardant exhibited improved flame retardancy for poly (lactic acid) (PLA) composites. The introduction of UiO@TEP50 significantly upgraded the UL-94 level, increased the limiting oxygen index value, reduced smoke production, and decreased the peak heat release rate compared to the control PLA sample. Furthermore, the PLA composites also showed enhanced mechanical properties and anti-UV effects.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Engineering, Chemical
Wei Jixuan, Zhao Chunxia, Li Yunchao, Li Yuntao, Sun Zhangmei, Xiang Dong, Li Hui
Summary: Phosphorylated celluloses (PCFs) were obtained by reacting microcrystalline cellulose with phosphorous acid in molten urea, and a flame retardant glutaraldehyde cross-linked poly(vinyl alcohol)/PCF aerogel was fabricated. Thermogravimetric analysis confirmed the enhanced thermal stability of the PVA aerogels incorporating PCF. The introduction of PCF in the aerogel resulted in significantly decreased peak of heat release rate and total heat release values, demonstrating better flame-retardant properties compared to pure PVA aerogel.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Jinghao Huo, Guoqiang Zhang, Xinyi Zhang, Xiaoyan Yuan, Shouwu Guo
Summary: Graphene is widely used in heat dissipation due to its high in-plane thermal conductivity and excellent mechanical properties. However, its poor cross-plane thermal conductivity limits its use in certain electronic applications. In this study, fluorinated graphene oxide (FG) with high thermal conductivity is prepared by grafting F atoms onto the surface of graphene oxide using poly(vinylidene fluoride) as a fluorine source. By avoiding the use of dangerous substances such as HF and F-2, FG can be synthesized effectively. The FG is then used to create a FG/PVA composite film with enhanced thermal conductivity, suitable for thermal management in flexible electronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Polymer Science
Fa Hu, Bo Cheng, Kun Cong, Dinghua Li, Wenchao Zhang, Zhaolu Qin, Rongjie Yang
Summary: The ladder phenyl/vinyl polysilsesquioxane (PhVPOSS) was used to enhance the flame retardancy of ethylene-vinyl acetate copolymer (EVA)/aluminum hydroxide (ATH) composites by grafting onto EVA molecular chains. The PhVPOSS improved the thermal stability of EVA/ATH composites and exhibited better fire safety as shown by the CONE experiments. The improved flame retardancy was attributed to the formation of Si-C bonds and Si-O bonds, which resulted in a more compact and denser char layer.
Article
Materials Science, Multidisciplinary
Xiaobing Ma, Han Yun, Ningjing Wu, Fukun Niu, Jihang Yu
Summary: In this study, an environmentally friendly and super efficient flame retardant PHEMAP was successfully synthesized and applied to PLA material, forming a flame retardant film with excellent performance. The film has high transparency and good flame retardant effect, and is expected to be widely used in the fields of mobile phones, automotive interiors, and 3D printing.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Thermodynamics
Daniela F. S. Freitas, Gabriela C. Mattos, Luis C. Mendes
Summary: Biodegradable ternary systems based on poly(vinyl alcohol)/poly(N-vinyl-2-pyrrolidone)/octadecylamine-containing zirconium phosphate were studied. The synthesis and intercalation of lamellar zirconium phosphate were accomplished. The interaction between PVA and ZrPOct was prominent, and the addition of octadecylamine altered the polymer-polymer interaction acting as a compatibilizing agent. This study provides a potential approach for controlled drug delivery.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Paper & Wood
Jinru Liu, Zhicai Yu, Hualing He, Yushu Wang, Yuhang Zhao
Summary: This study developed a novel fire-resistant composite hydrogel material with improved flame retardancy and extended burn time, demonstrating effective fire protection potential for firefighters.
Article
Environmental Sciences
Yu Zhang, Guiping Ren, Qijun Wang, Wenqing Xie, Zunzhuang Ke, Xu Zhao
Summary: This study demonstrates for the first time the enhanced carbon conversion efficiency between Lactococcus lactis and natural hematite under light illumination, and simulates the phenomenon in different systems, verifying its prevalence. This sunlight-triggered carbon cycle pathway is of great significance in nature.
GEOMICROBIOLOGY JOURNAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Yi-li Li, Qi Wang, Rui-run Chen, Xin-xiu Wang, Yuan Xia, Guo-ping Zhou, Ying-dong Qu, Guang-long Li
Summary: This study investigated the effects of adding V element on the modification of super-large cylinder liner. The addition of V could refine the microstructure and improve the mechanical properties. The best overall performance was achieved at 0.21 wt.% V content.
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
Article
Engineering, Environmental
Rui Tang, Kai Li, Changlin Liu, Yang Liu, Yun Gong, Jianhua Lin
Summary: A facile one-step hydrothermal method was used to synthesize m-BQ-V2O5 hierarchical microflowers with large lattice spacing and crystalline vacancies. The successful intercalation of m-BQ into V2O5 elongates the V-O bonds, resulting in unsaturated V centers and high storage capacity. The layered V-O-V framework prevents the leaching of m-BQ into the electrolyte and provides improved cycle stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Physics, Multidisciplinary
Yu Ma, Wei-Jiang Li, Yun-Fei Xu, Jun-Qi Liu, Ning Zhuo, Ke Yang, Jin-Chuan Zhang, Shen-Qiang Zhai, Shu-Man Liu, Li-Jun Wang, Feng-Qi Liu
Summary: We demonstrate optical frequency combs with a spectral emission of 48 cm(-1) and an output power of 420 mW based on a single-core quantum cascade laser at lambda similar to 8.7 mu m. The flat top spectrum of the comb sustains up to 130 comb modes, delivering approximately 3.2 mW of optical power per mode, which makes it a valuable tool for dual comb spectroscopy. The homogeneous gain medium, relying on a slightly diagonal bound-to-continuum structure, promises to provide a broad and stable gain for comb operation. Remarkably, the dispersion of this device is measured within 300 fs(2)/mm to ensure stable comb operation over 90% of the total current range. The comb exhibits a narrow beatnote linewidth of around 2 kHz and has weak dependence on the applied current for stable operation.
CHINESE PHYSICS LETTERS
(2023)
Article
Computer Science, Cybernetics
Xiaohe Qiu, Zhen Yang, Jinxing Yang, Qijun Wang, Duming Wang
Summary: With the development of augmented reality technology, AR navigation tools have gained increasing attention. This article investigates the effects of different AR navigation display methods on wayfinding performance and spatial knowledge acquisition through three experiments. The findings show that AR maps are superior to 2D maps in acquiring spatial knowledge and helping individuals acquire landmark and route knowledge. The improved map expands the range of spatial information and highlights landmark locations, providing comprehensive information about the environment and assisting in acquiring spatial knowledge.
INTERNATIONAL JOURNAL OF HUMAN-COMPUTER INTERACTION
(2023)
Article
Materials Science, Multidisciplinary
Qibin Wang, Qi Wang, Ruirun Chen, Xiaowei Wang, Yanqing Su, Hengzhi Fu
Summary: By synergistically adding Zr and Fe, the properties of Nb-24Ti-16Si-2Al alloy are optimized, suppressing the formation of (Nb, X)3Si phase and altering the constituent phases. The addition of Zr enhances the proportion of gamma-(Nb, X)5Si-3 and refines the eutectic colonies. Fe mainly controls the formation and proportion of Nb4FeSi phase. The formation of hexagonal gamma-(Nb, X)5Si-3 blocks improves room temperature toughness and compressive strength.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Wei Dai, Yunpeng Liang, Qimin Wang, Borong Li
Summary: In this study, Cr-TiBx coatings were deposited using a hybrid technique. The structure and hardness of the coatings varied with the deposition rate of Cr.
Article
Engineering, Mechanical
Dongsen Geng, Yu X. Xu, Bin Peng, Haiqing Li, Qimin Wang, Kwang Ho Kim
Summary: A comparative study was conducted on (Cr1-xAlx)(2)O-3 and (Cr1-xAlx) coatings with different Al contents (x = 0, 0.5, and 0.7) regarding their structural, mechanical, and tribological properties. It was observed that higher Al content resulted in a mixed structure of cubic and minor amorphous phases in the coatings. Additionally, the increase in Al content led to a decrease in hardness and residual compressive stress. Furthermore, the study revealed higher wear rates for the coatings under high-temperature conditions.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Energy & Fuels
Nannan Yao, Qunping Fan, Zewdneh Genene, Heng Liu, Yuxin Xia, Guanzhao Wen, Yusheng Yuan, Ellen Moons, Jan van Stam, Wei Zhang, Xinhui Lu, Ergang Wang, Fengling Zhang
Summary: This study investigates the device performance and morphology evolution of blade-coated all-polymer solar cells (all-PSCs) using PBDBT:PF5-Y5 blends prepared from two different solvents, chlorobenzene (CB) and ortho-xylene (o-XY). The results show that the CB-cast film has finer-mixed donor/acceptor nanostructures, leading to more efficient charge generation in the solar cells. The conformation of polymers in solution plays a crucial role in determining the overall film morphology and device performance.
Article
Plant Sciences
Qiao Xiao, Huina Liu, Chao Yang, Yi Chen, Yueyue Huang, Xiaoxia Xiao, Yaru Pan, Jinyang He, Qun Du, Qi Wang, Yifan Zhang
Summary: This study aimed to investigate the therapeutic effects and underlying mechanisms of the traditional Chinese medicine formula Bushen-Yizhi (BSYZ) on chronic cerebral hypoperfusion (CCH) in rats. The results showed that BSYZ attenuated oxidative stress and neuronal apoptosis through inhibiting excessive mitophagy, thus improving cognitive and memory abilities in CCH-injured rats.
JOURNAL OF ETHNOPHARMACOLOGY
(2023)
Editorial Material
Materials Science, Multidisciplinary
Yu Zhang, Haoran Peng, Linke Huang, Feng Liu
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Yu Zhao, Wei Zhang, Yingdong Qu, Shulin Dong, Rongde Li, Guoping Zhou, Ruirun Chen, Qi Wang, Wei Sun, Guanglong Li
Summary: In order to improve the wear resistance of ductile iron, TiC particles of different contents were added and the tribological behavior was studied. It was found that increasing TiC content promoted nucleation of cementite and increased cooling rate, leading to an increase in pearlite content and improved hardness and tensile strength. Ductile iron with 1 wt.% TiC showed the best tensile strength (498 MPa) and hardness (168 HV1). Wear resistance increased with TiC content, reducing the wear volume and changing the wear mechanism from adhesive to abrasive. The oxide layer on the worn surface and the hardened layer on the subsurface further enhanced wear resistance.
Article
Chemistry, Physical
Chao Liu, Caichao Ye, Yunyan Wu, Yifan Liu, Zhihang Liu, Zhaotian Chen, Renzhi Ma, Nobuyuki Sakai, Liang Xue, Jingwen Sun, Wenyao Zhang, Wenqing Zhang, Xin Wang, Takayoshi Sasaki, Pan Xiong, Junwu Zhu
Summary: Water evaporation-induced electricity generation is an emerging technology that can harvest electricity directly from natural water evaporation process. However, the low power density and conversion efficiency have hindered its practical applications, mainly due to weak water-solid interaction between evaporation-induced water flow and nanostructured materials. In this study, we propose a regulatory approach by introducing Ti vacancies at the atomic scale in two-dimensional nanostructures to enhance water-solid interaction for efficient electricity generation.
Article
Public, Environmental & Occupational Health
Jiaxin Dong, Qiqi Wang, Jue Liu, Hongyan Yao, Xiao Qi, Jianjun Liu
Summary: This report reveals that sanitation of public places has been a major focus of environmental sanitation construction in China, crucial to the goal of building national healthy cities and counties. The study findings indicate that residents' satisfaction with the sanitation of transportation hubs like railway stations ranked the highest, while farmers' markets ranked the lowest. The implications for public health practice are that this study provides valuable insights for government decision-makers to improve sanitation in key public places and further promote the construction of national healthy cities and counties.
Article
Food Science & Technology
Lan Wang, Lei Hao, Huaqing Hou, Lei Wang, Shuai Liu, Rongfeng Tang, Jin Mao, Qi Zhou, Qianchun Deng, Ling Yan, Changhong Liu, Lei Zheng, Jie Shi
Summary: Curcumin-encapsulated carboxymethylpachymaran/zein composite nanoparticles (ZMCNPs) were prepared and their properties were investigated. The encapsulation efficiency of curcumin by ZMCNPs was significantly higher than that of zein-curcumin nanoparticles (ZCNPs). ZMCNPs exhibited high stability and controlled release profile, and showed good biocompatibility. These findings offer novel options for delivering bioactive substances.
ACS FOOD SCIENCE & TECHNOLOGY
(2023)
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)
