Article
Engineering, Mechanical
Aman Arora, Aanchna Sharma, Mohit Singh, Dhiraj K. Mahajan, Vinod Kushvaha
Summary: This study presents an extensive experiment on the fatigue response of glass-filled epoxy composites under cyclic loading. Rod-shaped particulate glass fibers with volume fractions of 0%, 5%, 10%, and 15% are used to reinforce the epoxy matrix. The mechanical behavior of the resulting composite is examined under monotonic tensile loading and tension-tension cyclic fatigue loading. The study utilizes in-situ low cycle fatigue testing to investigate the damage mechanisms leading to crack initiation and propagation.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Composites
Siti Noorbaini Sarmin, Mohammad Jawaid, Sameer A. Awad, Naheed Saba, Hassan Fouad, Othman Y. Alothman, Mohini Sain
Summary: This study evaluated the use of olive waste in epoxy-based biocomposites, finding that olive tree small branches and big branches were able to significantly increase the tensile and flexural strength of the composites. Additionally, scanning electron microscopy was used to analyze the microstructure of the composites.
POLYMER COMPOSITES
(2022)
Article
Engineering, Manufacturing
Fuzhong Wang, Bohang Wang, Ya Zhang, Fei Zhao, Zihan Qiu, Lin Zhou, Shiwei Chen, Minxian Shi, Zhixiong Huang
Summary: Graphene nanoplatelets/silicon carbide nanowires hybrid films were successfully produced and used as reinforcements for laminated composites. The incorporation of silicon carbide nanowires significantly improved the thermal conductivity of the composites. The hybrid films also enhanced the storage modulus and interlaminar shear strength of the composites.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Review
Materials Science, Multidisciplinary
Yang Yang, Yanshuang Xu, Yan Ji, Yen Wei
Summary: Epoxy vitrimers offer reprocessability, self-healing, welding, reshaping, and recycling properties to epoxy resins, providing hope for replacing traditional thermosets in a wide range of applications in aerospace materials, electronic devices, and consumer products of daily life.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Liyang Shen, Tung-ping Wang, Ting-Han Lee, Michael Forrester, Andrew Becker, Sabrina Torres, Connor Pearson, Eric W. Cochran
Summary: The study introduces 3D printable polymer-toughened epoxy resin composites with enhanced mechanical properties. By utilizing self-assembling micelles, a balance of structure, creep resistance, and flowability is maintained throughout the 3D printing process, resulting in composites with improved impact strength without compromising thermal properties.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Xu Zhao, Yuwei Long, Shimei Xu, Xuehui Liu, Li Chen, Yu-Zhong Wang
Summary: Epoxy thermoset, the most commonly used thermoset plastic, is extensively applied in composite materials, electronic packaging materials, coatings, and adhesives. The increasing demands for wind power as a new energy source have greatly boosted the use of epoxy thermoset composite materials in wind turbine blades. The recovery of epoxy thermosets is currently a critical challenge due to the large-scale decommissioning of these materials. This review summarizes recent advances in the recovery of epoxy thermosets through source-based recovery strategies (rational design of recyclable thermosets) and end-based recovery strategies (recovery approaches for existing thermosets). The review focuses on the physcycling and chemcycling methods based on end-based recovery strategies and highlights important considerations in chemcycling, such as mass transfer and heat transfer, solvent effects, utilization of reinforced materials and epoxy thermosets, and upcycling. It suggests the development of application-oriented chemcycling based on selective degradation and effective reconstruction. The review concludes by discussing forthcoming challenges and prospects for future development.
Article
Energy & Fuels
Siti Noorbaini Sarmin, Mohammad Jawaid, Mohamed H. Mahmoud, Naheed Saba, Hassan Fouad, Othman Y. Alothman, Carlo Santulli
Summary: Olive biomass as a reinforcement for polymeric composites has gained attention in the construction industry. It offers cost-effective alternatives and immediate and long-term financial benefits compared to traditional materials. This study compared the mechanical behavior of olive waste/bamboo fiber hybrid composites to olive and bamboo fiber-reinforced epoxy. The hybrid composites showed enhanced mechanical properties and are suitable for load-bearing applications requiring lightweight and high strength, such as floor panels and automotive interior.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Multidisciplinary
Carlos A. Navarro, Yijia Ma, Katelyn H. Michael, Hanna M. Breunig, Steven R. Nutt, Travis J. Williams
Summary: The presented catalytic, aerobic conditions enable depolymerization of amine-linked epoxy thermoset matrix polymers commonly found in high-performance CFRP materials. Unlike other recycling methods, this process retains the aligned and woven fibers in the same pattern as the parent material and recovers valuable materials from the thermoset matrix.
Article
Materials Science, Multidisciplinary
K. Senthilkumar, M. Chandrasekar, Othman Y. Alothman, Hassan Fouad, M. Jawaid, M. A. Azeem
Summary: The objective of this research is to investigate the suitability of olive tree leaves powder (OTL) as reinforcement in epoxy composites along with pineapple leaf fibre (PALF). The study found that increasing the proportion of PALF in the hybrid composites significantly improved impact strength, but the bending strength and flexural modulus were lower than the parent composites. DMA results showed that hybrid composites outperformed parent composites in terms of storage modulus, loss modulus, and damping factor.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Electrical & Electronic
Tao Han, Qiang Li, Xin Zhao, Yufei Yao, Jing Li, Yu Gao
Summary: This article presents a method to analyze the impact of space charge on tree initiation and investigates the inhibitory effect of voltage stabilizer on electrical treeing. The results demonstrate that the voltage stabilizer at 0.5 wt% content exhibits the optimal performance.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2023)
Article
Materials Science, Composites
Ruikang Zhao, Fan Jing, Chenxuan Li, Rui Wang, Zhonghua Xi, Jun Cai, Qingjun Wang, Hongfeng Xie
Summary: Graphene oxide (GO) was used to modify warm-mix epoxy asphalt binders (WEABs) with different loading, and the performance of the composites was investigated. The results showed that GO significantly enhanced the thermal stability and mechanical properties of the pure binder. The addition of GO also affected the viscosity and phase-separated morphology of the modified binders.
POLYMER COMPOSITES
(2022)
Article
Engineering, Civil
Shengqi Pan, Qiyi Dai, Babak Safaei, Zhaoye Qin, Fulei Chu
Summary: This paper investigates the damping characteristics of carbon nanotube reinforced epoxy nanocomposite beams, proposing a modified Biot model for simulation and implementing it into a finite element model. The comparison between theoretical and experimental results shows the improved accuracy of the modified Biot model, with the damping ratios of composite beam specimens fluctuating with the increment of CNT weight ratio.
THIN-WALLED STRUCTURES
(2021)
Article
Polymer Science
Muhammad Adeel, Bingjie Zhao, Honggang Mei, Lei Li, Sixun Zheng
Summary: A novel poly(ionic liquid) (PIL)-containing diblock copolymer was successfully synthesized via a living/controlled polymerization approach, showing self-assembly behavior in ethyl acetate. Introduction of fluorine-containing PIL diblock copolymer significantly improved the surface properties of thermosets and enhanced the dielectric constants of the materials, which further increased with temperature, demonstrating potential applications in nanomaterials and smart materials technologies.
Article
Engineering, Multidisciplinary
Geng Di Sia, XiangYu Hong, Hao Yu, HengAn Wu, Yew Mun Hung
Summary: This study aims to preserve the superhydrophilicity and ultrafast water permeation property of thermally cured graphene nanoplatelets (GNPs) coating after adding epoxy to enhance adhesion. The addition of epoxy promotes the formation of carbon-carbon chains during thermal curing, making the GNPs/epoxy nanocomposite hydrophobic. However, the use of silver-filled epoxy can prevent the crosslinking of carbon-carbon chains and preserve the superhydrophilicity of GNPs. Comprehensive characterizations and molecular dynamics simulations were conducted to understand the interaction between carbon-filled epoxy, silver-filled epoxy, and graphene nanostructure during the curing process. This study provides important insights into the preservation of superhydrophilicity in GNPs/epoxy nanocomposites.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Philip Nash, Yang Zhou
Summary: The discontinuous precipitation reaction, a phase transformation observed in alloys for over 50 years, has the potential to offer significant strengthening if it progresses to completion. While it is known to be detrimental to mechanical properties when confined to grain boundary regions, this transformation can provide a new paradigm for both structural and functional applications.
JOURNAL OF MATERIALS SCIENCE
(2022)
