Article
Materials Science, Ceramics
Mehdi Shoorangiz, Zahra Sherafat, Elham Bagherzadeh
Summary: The emerging smart PVDF-based composites can address the intrinsic property deficiencies in their components. The properties of these composites are determined by their constituents and fabrication method. In this study, potassium sodium niobate (KNN) and MWCNTs were used as primary reinforcement and to improve electrical properties, respectively. Solution casting was employed to prepare PVDF-KNN-CNT composite films. SEM, XRD, FTIR, and TGA methods were used to characterize the composites, and dielectric, piezoelectric, and ferroelectric properties were investigated. The results showed that the composites' dielectric, piezoelectric, and ferroelectric properties strongly depend on KNN content.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Analytical
Alec Ikei, James Wissman, Kaushik Sampath, Gregory Yesner, Syed N. Qadri
Summary: PVDF-TrFE has shown to be a more promising material choice than PVDF in the field of functional 3D printing, due to its ability to achieve high levels of piezoelectric performance. This study demonstrates an in situ 3D printing and poling method for PVDF-TrFE, paving the way for the development of pressure sensors with higher sensitivity and accuracy.
Article
Polymer Science
Julio E. Trevino, Swati Mohan, Alexandra E. Salinas, Emilia Cueva, Karen Lozano
Summary: This study developed and characterized PVDF-conjugated polymer nanofiber-based systems, with PVDF/PPY nanofiber system exhibiting the highest piezoelectric performance. These systems show potential as an attractive source of energy for various devices.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Review
Materials Science, Multidisciplinary
Zhangbin Feng, Ziquan Zhao, Yanan Liu, Yukang Liu, Xianyang Cao, Deng-Guang Yu, Ke Wang
Summary: With the increasing demand for flexible self-powered sensors and nanogenerators, researchers have extensively studied polyvinylidene fluoride (PVDF) due to its remarkable piezoelectric and dielectric properties. Electrospinning has been identified as an effective and cost-efficient method for increasing the beta content of PVDF without the need for external high voltage pooling or mechanical stretching. Various types of electrospun PVDF fibers, such as uniaxial fibers, highly aligned fibers, core-shell fibers, and Janus fibers, have been developed to enhance piezoelectric characteristics. Furthermore, research on theoretical modeling has been conducted to optimize the design of piezoelectric nanogenerators. Prospective applications of electrospun PVDF and its copolymer PVDF-TrFE, ranging from sensors to smart skin and energy harvesters to electronic textiles, are currently being explored.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Review
Chemistry, Multidisciplinary
Fei Teng, Jianlin Luo, Yibo Gao, Xiaoyang Zhou, Jigang Zhang, Song Gao, Shengwei Sun
Summary: CNT-modified cement-based smart material (CNTCS) has excellent electromechanical properties and can be developed as a static/dynamic intrinsic sensor for Structural Health Monitoring (SHM) after effective packaging and calibration. The dispersion methods and influence laws of CNT in the water/cement matrix were summarized, and the full-frequency domain sensing mechanism of CNTCS was analyzed. The practicality of applying CNTCS as an SHM static/dynamic intrinsic sensor was further investigated.
NANOTECHNOLOGY REVIEWS
(2021)
Article
Materials Science, Composites
Sobhan Sharafkhani, Mehrdad Kokabi
Summary: This study utilized electrospinning to produce highly aligned PVDF nanofibers, where MWCNTs were coaxially aligned inside the nanofibers. The coaxially aligned MWCNTs provided enhanced interfacial interactions, resulting in outstanding effects on the crystalline structure and actuator response of PVDF. The nanofibers exhibited excellent piezoelectric performance with high potential for practical applications.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Composites
Long Chen, Chengchao Liu, Shucheng Liu, Yuanzhi Chang, Yunxiao Liu, Jianming Zhang, Qing Yu, Guiqing Cheng, Zhongwei Wang
Summary: In this study, a conductive polymer composite with excellent positive temperature coefficient (PTC) reproducibility was prepared by introducing cellulose nanocrystals (CNCs) grafted with methyl methacrylate (CNC-g-PMMA). The introduction of CNC-g-PMMA increased the PVDF/HDPE viscosity ratio, resulting in a finer morphology of the conductive carbon black (CB)/HDPE phase and achieving stable PTC performance.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Composites
Saddiqa Begum, Hameed Ullah, Irfan Ahmed, Yiqiang Zhan, Ayesha Kausar, Muhammad Adeel Aleem, Saeed Ahmad
Summary: Oxidized and grafted multi-walled carbon nanotubes in PVDF matrix showed improved dispersion and enhanced electrical properties, making them suitable for various energy applications. The nanocomposites exhibited well crystalline structure and uniform distribution of nanotubes, leading to the formation of beta-phase and improved electrical conductivity.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Computer Science, Interdisciplinary Applications
H. Mallek, H. Jrad, M. Wali, F. Dammak
Summary: In this study, a geometrically nonlinear finite shell element was introduced to predict the nonlinear dynamic behavior of FG-CNTRC shells. The governing equations were developed using an improved FSDT, and micro-mechanical model was utilized to examine the effective material properties of FG-CNTRC structures. The effectiveness of the method was demonstrated through validation with literature results, and novel numerical results were presented for consideration in future structure design.
ENGINEERING WITH COMPUTERS
(2021)
Article
Polymer Science
Victor M. Ruiz, Dania Olmos, Javier Gonzalez-Benito
Summary: A study was conducted on the flexoelectric behavior of PVDF-based materials by considering their design on a macroscopic level. The materials were prepared using SBS manufacturing and filled with MWCNT to achieve controlled concentrations. The flexoelectric behavior was analyzed using a specially designed testing machine, which measured the output voltage signals under cyclic mechanical perturbation at different perturbation rates. The mechanical behavior of the materials was found to be influenced by their porosity and MWCNT concentration. The study revealed that flexoelectricity depends not only on strain gradient, but also on the time of mechanical response and viscoelastic properties of the materials. This research provides new insights into the study of flexoelectric behavior in polymer composite materials and lays the foundation for designing PVDF-based materials with high flexoelectric yields for easy-to-handle sensors.
Review
Engineering, Electrical & Electronic
Abdullah Abdulhameed, Nur Zuraihan Abd Wahab, Mohd Nazim Mohtar, Mohd Nizar Hamidon, Suhaidi Shafie, Izhal Abdul Halin
Summary: This article presents the general concept of how carbon nanotubes enhance the electrical conductivity of electronic materials. It describes the methods used to prepare and fabricate these enhanced materials, highlighting the importance of CNT orientation and concentration in controlling material electrical conductivity. Additionally, applications of these enhanced materials ranging from consumer electronic products to precision biological electronic materials that can be implanted in the human body are reported.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Physical
Wanghong Zeng, Weili Deng, Tao Yang, Shenglong Wang, Yue Sun, Jieling Zhang, Xiarong Ren, Long Jin, Lihua Tang, Weiqing Yang
Summary: A self-powered piezoelectric sensor based on a gradient carbon nanotube/polyvinylidene fluoride composite was designed to monitor the interactions between the ball and the shoe. The sensor demonstrated enhanced force-electric coupling with an excellent sensitivity and durability, allowing for real-time acquisition of kick position and contact force for personalized soccer training.
Article
Metallurgy & Metallurgical Engineering
Hong Yang, Lian-zhong Zhao, Yan Zhang, Hang Luo, Ri-chu Wang, Dou Zhang, Xiao-feng Wang
Summary: In this study, direct ink writing (DIW) was used to prepare polyvinylidene fluoride (PVDF) film. The rheological properties of inks were studied, and the influence of process parameters on material properties was investigated using various testing methods. The results showed that the PVDF film prepared with specific printing parameters had a significantly improved β-phase content compared to film prepared by solution casting. The high β-phase content enhanced the electrical properties and piezoelectric performance of the PVDF film, making it suitable for small deformation monitoring.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Review
Chemistry, Multidisciplinary
J. Chen, C. Ayranci, T. Tang
Summary: The development of electrospun PVDF fibers has led to the research of piezoelectric materials for applications in flexible self-powered generators. Studies have focused on improving the piezoelectric properties by introducing fillers or additives. This work provides a comprehensive review and analysis of the production, characterization, and modeling of PVDF composite fibers to enhance flexibility and piezoelectricity, offering insights into the challenges and potential in the field of high-performance energy harvesting systems.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Jong Hyun Eun, Sun Min Sung, Min Seong Kim, Bo Kyoung Choi, Joon Seok Lee
Summary: This study analyzed the effects of experimental parameters on the mechanical and piezoelectric properties of PVDF nanofibers, finding that MWCNT content and fiber orientation significantly impact fiber performance, with the 0.008 wt% MWCNT content showing excellent tensile strength.
MATERIALS & DESIGN
(2021)
Article
Engineering, Biomedical
Tiffany S. Pinho, Deolinda Silva, Jorge Cibrao Ribeiro, Ana Marote, Rui Lima, Salete J. Batista, Rita Melo, Clarisse Ribeiro, Cristiana B. Cunha, Irina S. Moreira, Senentxu Lanceros-Mendez, Antonio J. Salgado
Summary: This study focuses on the application of poled and coated PVDF films for neural differentiation and found that these films can induce neuronal differentiation under mechanical stimulation, which is further enhanced with a pre-coating step of poly-d-lysine and laminin.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2023)
Review
Chemistry, Multidisciplinary
Ander Reizabal, Carlos M. Costa, Leyre Perez-Alvarez, Jose L. Vilas-Vilela, S. Lanceros-Mendez
Summary: In this review, the molecular structure, original properties, available modifications, and processing methods of silk fibroin are presented, providing a wide overview for custom structural and functional variations.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Polymer Science
R. Policia, D. M. Correia, N. Perinka, C. R. Tubio, S. Lanceros-Mendez
Summary: This study develops printable electroluminescent materials and devices based on different polymer matrixes. Incorporating different contents of zinc sulfide co-doped with copper particles into various polymer matrixes, the influence of the polymer matrix on the functional performance of the materials is evaluated. The printability of the materials is demonstrated and SEBS shows the highest luminance values in functional devices.
Article
Chemistry, Applied
Teresa Marques-Almeida, Senentxu Lanceros-Mendez, Clarisse Ribeiro
Summary: Biocompatible and electroactive polymers are required for tissue engineering applications to produce active scaffolds. Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) meets these requirements and its processing and properties were investigated in this study. The developed PHBV fibers showed bioactivity by mineralizing carbonated hydroxyapatite and partially degrading after 60 days in contact with simulated body fluid, indicating their suitability for bone tissue engineering.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Article
Chemistry, Physical
Srikanth Ponnada, Mubashir Mansoor, Navid Aslfattahi, Nilgun Baydogan, Susmita Naskar, Rakesh K. Sharma, Maryam Sadat Kiai
Summary: To address the issues of Li dendrite growth and polysulfide movement in Li-S batteries, researchers have developed Cu or Fe-coated ultrathin MOF nanosheets on a glass fiber separator. The Cu or Fe atoms facilitate Li ion movement while preventing polysulfide migration through Lewis acid-base interaction. The Cu/MOF and Fe/MOF separators exhibit excellent long-term cycling stability, with low-capacity decay and high capacity retention after 400 cycles, demonstrating their potential for practical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
K. O. Shvydyuk, F. F. Rodrigues, J. Nunes-Pereira, J. C. Pascoa, S. Lanceros-Mendez, A. P. Silva
Summary: The developed research investigates cost-effective MgO-Al2O3, MgO-CaZrO3 perovskite, and thermally stable YSZ ceramic composites for DBD plasma actuators in aerospace applications. The study focuses on their implementation for flow control and ice mitigation. Results show that MgO-Al2O3 achieves higher induced velocities and lower heat dissipation, making it the best candidate for active flow control mechanisms. YSZ, on the other hand, exhibits high power consumption and is suitable for ice mitigation. This extensive research highlights the promising potential of these ceramics as breakthrough materials for DBD plasma actuators.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Ricardo Brito-Pereira, Clarisse Ribeiro, Pedro Costa, Vitor Correia, Vanessa F. Cardoso, Senentxu Lanceros-Mendez
Summary: The study proposes multifunctional hydrophobic composites with conductive graphene nanoplatelets (GNPs) integrated into the wax matrix to achieve a dual role of barrier and heater. With post-thermal curing, wax prints with mechanical stability and adequate impregnation can achieve controlled temperatures ranging from room temperature to approximately 107 degrees Celsius in just 10 seconds. This technology has great potential to meet the increasing demand for versatile and effective microfluidic paper-based analytical devices (mu PADs).
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Review
Chemistry, Multidisciplinary
Carlos M. Costa, Vanessa F. Cardoso, Pedro Martins, Daniela M. Correia, Renato Goncalves, Pedro Costa, Vitor Correia, Clarisse Ribeiro, Margarida M. Fernandes, Pedro M. Martins, Senentxu Lanceros-Mendez
Summary: This article reviews the latest advances and applications of poly(vinylidene fluoride) (PVDF) and its derivatives, highlighting the characteristics of PVDF materials, especially their outstanding electroactive properties, and their application in areas such as sensors and energy harvesting.
Article
Chemistry, Multidisciplinary
Apoorva Malik, Pragati R. Sharma, Rakesh K. Sharma
Summary: In this letter, a highly selective crown-ether-appended calix[4]arene derived phase transfer catalyst was designed and applied for asymmetric nitroaldol reaction, leading to the desired adducts with high yields and good enantioselectivities.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Materials Science, Composites
E. Pimentela, P. Costa, C. R. Tubio, J. L. Vilaca, C. M. Costa, S. Lanceros-Mendez, D. Miranda
Summary: Flexible sensor devices are in high demand for new and improved health treatments, particularly for neurogenic bladder dysfunction. Polymer composites based on different matrices (CMC, SEBS, and PVA) and varying concentrations of multiwalled carbon nanotubes (CNT) have been developed for catheter medical device application. These composites demonstrate excellent electrical and mechanical properties, with high conductivity and piezoresistive response.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Correction
Materials Science, Biomaterials
S. Ribeiro, M. Soares, B. Hermenegildo, V. Correia, A. Garcia Diez, S. Lanceros-Mendez, C. Ribeiro
BIOMATERIALS ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Goncalo Fonseca, Joao Nunes-Pereira, Abilio P. Silva
Summary: This study presents a low-cost sensory glove system that enhances the functionality of a 3D-printed mechanical hand prosthesis by enabling touch detection, localization, and force measurement. The mechanical hand model was produced using 3D printing, allowing for quick and affordable production with the ability to replace individual parts easily. A complementary sensory mimicry add-on system was constructed and instrumented with piezoresistive sensors attached to the glove's palm, enabling the localization and quantification of forces exerted on the glove. This system has shown promising results and could serve as a platform for the development of a more complex and multifunctional system in the future.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Cristian Mendes-Felipe, Rui Carvalho, Pedro Martins, Oleksandr Igorovych Ivankov, Ivan Bobrikov, Viktor Petrenko, Jose Maria Porro, Marco Sangermano, Senentxu Lanceros-Mendez
Summary: Magnetodielectric materials, which allow magnetic control of dielectric response, are highly interesting for IoT-related devices. Photocurable polymers combined with magnetic nanoparticles offer a sustainable and efficient approach for their development. Photocurable magnetic hybrid materials based on PUA and various magnetic micro- and nanoparticles have been developed, with investigations on their physicochemical properties, electrical conductivity, and magnetic properties. By optimizing the filler type and content, composites with high magnetodielectric coefficients have been obtained, making them important for the fabrication of magnetodielectric devices in the digital transition context.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Miguel Franco, Azadeh Motealleh, Carlos M. Costa, Nikola Perinka, Clarisse Ribeiro, Carmen R. Tubio, Sonia AlexandraCorreia Carabineiro, Pedro Costa, Senentxu Lanceros-Mendez
Summary: Flexible and conformable conductive composites using different polymers and graphene oxide have been developed for printable solutions with functional properties. The materials have low resistance and support bending deformations, making them suitable for sustainable and functional printable electronics.
ACS APPLIED POLYMER MATERIALS
(2023)
Review
Materials Science, Ceramics
Kateryna O. Shvydyuk, Joao Nunes-Pereira, Frederico F. Rodrigues, Abilio P. Silva
Summary: The pursuit of improved performance in the aeronautical and aerospace industries has led to research and development of advanced ceramics. These ceramics have the unique ability to fulfill various application requirements, such as thermomechanical, thermoelectric, and electromechanical properties, ensuring reliability, durability, and extended lifespan of critical structures or systems. In the aeronautical and aerospace fields, engineered ceramic appliances serve three main purposes: thermal protection systems, thermal protection barriers, and dielectric barrier discharge plasma actuators. This research provides a comprehensive discussion and review of these applications and explores the concept of multifunctional advanced ceramics for future engineering needs and perspectives.
CERAMICS-SWITZERLAND
(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)
