Article
Engineering, Environmental
Giada Lo Re, Emile R. Engel, Linnea Bjorn, Manuel Guizar Sicairos, Marianne Liebi, Jan Wahlberg, Katarina Jonasson, Per A. Larsson
Summary: To replace materials from non-renewable sources, cellulosic materials need to overcome limitations such as fragility, gas permeability, susceptibility to water vapor, and poor shaping. Innovative properties or improved existing properties are essential to expand their applications and create new market opportunities. The study successfully overcomes restrictions in melt-processing of high cellulose content composites and demonstrates the use of chemically modified cellulose fibers for manufacturing highly sustainable materials with tailored properties for specific applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Composites
Feifei Liu, Xiu Shan, Zhaobo Wang
Summary: The nonisothermal crystallization kinetics of ethylene-acrylic acid copolymer (EAA) and thermoplastic vulcanizate (TPV) based on EAA/chloroprene rubber (CR) were extensively studied using differential scanning calorimetry. Different methods, including the Avrami, Ozawa, and Mo equations, were used to analyze the nonisothermal crystallization processes. The results showed that the Avrami analysis modified by Jeziorny and a method developed by Mo provided a good description, while the Ozawa analysis did not. Increasing the cooling rates accelerated the crystallization processes, and the EAA/CR TPV had higher crystallization temperatures compared to pure EAA. The presence of more CR phase in the TPV caused a steric effect and prolonged the crystallization process.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2022)
Article
Polymer Science
Muhammad Zia-ul-Haq, Zaheer Ul Haq, Jian Wu, Zonglin Peng, Yong Zhang
Summary: Silicone rubber composites containing magnesium sulfate whiskers were successfully prepared with ethylene-vinyl acetate copolymer as a compatibilizer. Comparisons were made between composites with unmodified and modified magnesium sulfate whiskers, showing that the composites filled with whiskers have lower activation energy values and higher tensile and tear strength.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Multidisciplinary
Machar Devine, Ankur Bajpai, Winifred Obande, Conchur M. O. Bradaigh, Dipa Ray
Summary: The increasing use of polymer composite materials requires the development of recyclable alternatives or new recycling techniques. One promising recyclable alternative is the room temperature infusible acrylic resins commercially known as Elium & REG;. This study investigates the long-term immersion of these materials in seawater and compares their mechanical properties and fracture behavior to traditional epoxy composites.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Polymer Science
Xinying Deng, Ming Shun Hoo, Yi Wen Cheah, Le Quan Ngoc Tran
Summary: This study investigated the processing and modification methods of basalt fiber-reinforced thermoplastic composites to improve their mechanical properties. Optimized material preparation and processing steps improved the impregnation and mechanical properties of the fibers. The use of a compatibilizer significantly enhanced the strength of the short fiber composites.
Article
Materials Science, Composites
Bing Wang, Nan Li, Xin Fu, Shan Cheng, Na Zhao, Jiazi Zhang, Fangyuan Hu, Qingguang Bao, Haoyue Hao, Xigao Jian
Summary: This paper presents a facile and effective method to improve the mechanical and thermal properties of CF/PPBESK composites by modifying PPBESK resin with SiC nanowires. The results show that the incorporation of SiC nanowires enhances the toughness of the resin and the interfacial performance between CF and PPBESK, leading to significant improvements in the mechanical and thermal properties of the composites.
POLYMER COMPOSITES
(2023)
Article
Polymer Science
Ines Meyer zu Reckendorf, Amel Sahki, Didier Perrin, Clement Lacoste, Anne Bergeret, Avigael Ohayon, Karynn Morand
Summary: The objective of this study was to compare different chemical recycling methods for thermoplastic acrylate-based composites in terms of material recovery. The goal was to recover undamaged basalt fabrics for reuse as reinforcements in second-generation composites. Two protocols, ultrasound and mechanical stirring, were compared. It was found that the dissolution protocol using mechanical stirring was more effective in recovering undamaged fabrics with no residual resin. The mechanical properties of the second-generation composites were equivalent to those of the first-generation composites.
Article
Chemistry, Multidisciplinary
Yide Liu, Jiuyong Yao, Kai Li, Xiankai Li, Yanzhi Xia
Summary: Natural polysaccharides, such as sodium alginate (SA), have attracted attention for their inherent flame retardancy, biodegradability, and environmental friendliness. In this study, flame retardant poly(vinyl alcohol) (FR-PVA) composites containing ammonium polyphosphate (APP) and SA were produced, exhibiting excellent fire retardance and self-extinguishing properties. SA not only inhibits the agglomeration of APP, but also enhances flame retardancy by promoting the formation of char carbon. The resulting FR-PVA composites have potential applications in packaging, home textiles, and biomaterials.
NEW JOURNAL OF CHEMISTRY
(2023)
Review
Materials Science, Multidisciplinary
Masoud Bodaghi, Chung Hae Park, Patricia Krawczak
Summary: The demand for thermoplastic composites is increasing due to their advantages over thermoset materials. Manufacturing thermoplastic composite parts using liquid composite moulding techniques can be challenging, but can be overcome through reactive processing. This article provides an overview of the manufacturing characteristics of acrylic-based reactive thermoplastics and their potential applications in various manufacturing techniques.
FRONTIERS IN MATERIALS
(2022)
Review
Engineering, Multidisciplinary
Winifred Obande, Conchur M. O. Bradaigh, Dipa Ray
Summary: The increasing demand for lightweight materials is driving steady growth in the continuous fibre-reinforced polymer composite industry. Research focus has shifted towards addressing end-of-life challenges posed by thermoset matrices, as thermoplastics still face challenges in reaching the same level of technological maturity.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Chemical
Longyi Sun, Xun Lu, Qiang Bai, Zhaobo Wang
Summary: In this study, blends of EAA/EVA with triple-shape memory effect were fabricated using DCP as the crosslinking agent. The mechanical and thermal properties were tested, and the shape fixity ratio and shape recovery ratio were used as evaluation standards for the triple-shape memory behavior. The blends exhibited prominent shape memory properties and stable shape memory behavior, suggesting potential applications in smart devices.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Environmental Sciences
Ying Wang, Zaiwen Lin, Qi Liu, Jiahui Zhu, Jingyuan Liu, Jing Yu, Rongrong Chen, Peili Liu, Jun Wang
Summary: The amidoximation ethylene-acrylic acid copolymer balls (EAA-AO) prepared by grafting diaminomaleonitrile and further treatment showed ultra-high adsorption performance for uranium (U(VI)) in radioactive wastewater. The adsorption capacity of EAA-AO was significantly higher than that of other substances, laying a new foundation for the treatment of uranium pollution in radioactive wastewater.
Article
Materials Science, Paper & Wood
Saebohm Jhang, Woongbi Cho, Seo Ku Lee, Ah Ran Yu, Jae Gyeong Lee, Kyungho Jung, Yunqiao Pu, Chang Geun Yoo, Jeong Jae Wie
Summary: This study investigates the effects of functional groups on the mechanical properties of composites by examining chemically modified microcrystalline methyl cellulose. It is found that high substitution levels of hydroxypropyl group can improve the mechanical properties and density of the composites.
Article
Polymer Science
A. M. Radzi, Sheikh Ahmad Zaki, Mohamad Zaki Hassan, R. A. Ilyas, Khairur Rijal Jamaludin, Mohd Yusof Md Daud, Sa'ardin Abd Aziz
Summary: Natural-fiber-reinforced composites, especially bamboo, are considered as alternative materials with advantages such as being environmentally friendly, renewable, low-cost, low-density, non-toxic, and fully biodegradable. This review focuses on bamboo fiber composites and discusses their types, polymer matrices, hybrid composites, and applications. Moisture poses a constraint in the development of bamboo fiber composites, but efforts have been made to mitigate its effect through chemical treatments.
Article
Engineering, Environmental
Haithem Bel Haj Frej, Romain Leger, Didier Perrin, Patrick Ienny, Pierre Gerard, Jean-Francois Devaux
Summary: The study examines the feasibility of recovering and reusing fibers and matrix from carbon fiber reinforced thermoplastic Elium composites. An original pyrolysis process and distillation were used to recover clean carbon fibers and matrix monomer for reuse. The recreated composite, made from recycled fibers and matrix, exhibited similar properties to virgin materials and showed enhanced fiber-matrix interphase bonding.
RESOURCES CONSERVATION AND RECYCLING
(2021)
