Article
Materials Science, Composites
Tiwen Xu, Yuanni Xin, Yueqiong Wang, Lusheng Liao, Haifeng Li, Jianfeng Ban, Ying Yang
Summary: The addition of crude beta-dextranase in raw natural rubber/halloysite nanotube composites can improve curing time, elastic modulus, and tensile strength, resulting in minimal hysteresis loss at high temperatures. The findings suggest beta-dextranase as a potential novel interfacial modifier in NR composites.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Composites
Li Yuan, Tian Pan, Guozheng Liang, Aijuan Gu
Summary: Three-dimensional structures were constructed during the fabrication process of glass-fiber-reinforced thermosetting cyanate ester/bismaleimide composites. A self-stitching technique was developed to aid in the crack self-healing of the composites. The mechanical properties of the composites were significantly improved by the 3D structures. The healing efficiency of the composites reached 96%.
POLYMER COMPOSITES
(2023)
Article
Polymer Science
Khurshid Malik, Faiz Ahmad, Nurul Azhani Yunus, Ebru Gunister, Saad Ali, Ali Raza
Summary: This research investigates the physical and mechanical properties of hybrid composites made of epoxy reinforced by kenaf and flax natural fibers. The results showed that the density of the hybrid composites remained unchanged, and increasing the kenaf fiber volume fraction improved the tensile, flexural, and interlaminar shear performance. The stacking sequence significantly affected the mechanical properties of the hybrid composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Shiwei Feng, Zhiguo Jiang, Zhaobin Qiu
Summary: Three fully biobased PHFSe copolyesters with different HSe unit contents (10 mol%, 20 mol%, and 30 mol%) were synthesized successfully. The PHFSe copolyesters showed high thermal stability and their thermal and mechanical properties could be easily tuned by changing the HSe unit content.
Article
Materials Science, Composites
Bernhard Ungerer, Ulrich Mueller, Maximilian Pramreiter, Enrique Herrero Acero, Stefan Veigel
Summary: This study found that the crimp of yarns had a significant impact on the strength properties of composite specimens, with a higher crimp ratio leading to decreased performance. Applying prestress to crimped yarns was proven to be an effective way to achieve straight alignment in the loading direction.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Tatiana Ushakova, Elena Starchak, Vadim Krasheninnikov, Maxim Shcherbina, Sergey Gostev, Ludmila Novokshonova
Summary: The morphology and viscoelastic behavior of a wide range of in-reactor blends based on ultrahigh molecular weight polyethylene were investigated to understand the relationships between the structure and properties of polyolefin materials. Linear dependences of alpha-relaxation temperature on the lamella sizes in crystalline phase and beta-relaxation temperature on the density of butyl branches in copolymer fractions were found. The mechanisms of the processes of alpha- and beta-relaxations in the in-reactor blends with different microstructure polymer fractions were discussed.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Composites
Xujing Yang, Jiangyan Chang, Wenjun Fang, Zhiwei Yu, Maojun Li, Qing Li
Summary: Crystallization and phase engineering can significantly improve the impact toughness and heat deflection temperature of long glass fiber-reinforced polypropylene random copolymer (LGF/PPR) composites by tuning the crystallization behavior and phase structure through introducing beta-nucleating agent (beta-NA). The introduction of beta-NA increases the impact strength of beta-PPR and beta-LGF/PPR/MPPR, paving the way for preparing LGF/PPR composites with high-impact toughness. The study reveals the influence of LGF and beta-NA on the nucleation and crystallization mechanism of the PPR matrix, establishing a correlation with tensile and impact properties.
POLYMER COMPOSITES
(2021)
Article
Engineering, Chemical
Riggs W. W. Johnson, Haley R. R. Scopelliti, Nathan T. T. Herrold, Katsuyuki Wakabayashi
Summary: Ultra-high molecular weight polyethylene (UHMWPE) is a high-performance thermoplastic widely used in biomedical, leisure, and coating applications. However, its recycling is challenging due to its high melt viscosity and exceptional chemical resistance. This study investigates the use of a processing technique called solid-state shear pulverization (SSSP) for mechanically recycling post-industrial scrap UHMWPE materials and improving their ductility and toughness.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Materials Science, Composites
Nafise Torbati-Fard, Mir Hamid Reza Ghoreishy, Ghasem Naderi, Seyed Mostaffa Hosseini
Summary: This study investigated the effects of silicon carbide (SiC) nanoparticles as a secondary filler on filler networking in carbon black (CB)/SiC hybrid filled styrene-butadiene rubber (SBR). The results showed that there was a critical loading of SiC in the low-loading range, which improved the dispersion state in the hybrid composite. The surface energy mismatch between CB and SiC decreased the kinetics and extent of filler networking in the SBR matrix.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Composites
Anindita Mukherjee, Barnali Dasgupta Ghosh
Summary: Polymer composite films were fabricated by embedding well-dispersed ZnO@APTES nanoflakes (0, 20, 30, 40, 50 vol%) into polyvinylidene fluoride (PVDF) matrix using a solution casting method. Surface modification and high aspect ratio morphology of ZnO@APTES enhanced the interfacial interaction between PVDF and ZnO, resulting in reduced dielectric loss and improved energy storage performance. The optimized loading of 30 vol% ZnO@APTES in PVDF showed an appreciable recoverable energy density of about 3.2 J/cm(3), indicating its potential application in energy storing portable devices.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Ceramics
Haoyi Wang, Delong Cai, Zhihua Yang, Xiaoming Duan, Bingzhu Wang, Bo Wang, Daxin Li, Dechang Jia, Yu Zhou
Summary: In this study, a boron nitride-magnesium aluminum silicate (BN-MAS) composite ceramics were fabricated using hot-press sintering at different temperatures. The relationship between sintering temperature and microstructure was investigated, showing that h-BN had a significant inhibitory effect on the crystallization of the MAS system at temperatures above 1400 degrees C. The composite sintered at 1700 degrees C exhibited the highest bending strength.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Xianjun Zeng, Qiang Jing, Jianwei Sun, Jinyong Zhang
Summary: By utilizing 3D printing technology to prepare fractal structures in alumina ceramics and utilizing spark plasma sintering technology to fabricate aluminum composites with fractal ceramic structures, it has been found that the fractal structure can improve the mechanical properties of materials, increasing the compressive strength by 10.97% and torsional properties by 17.45%. This provides a new method for enhancing the mechanical properties of materials.
Article
Nanoscience & Nanotechnology
Ziyue Yang, Lidong Wang, Jie Li, Zhendong Shi, Miao Wang, Jie Sheng, Weidong Fei
Summary: Graphene/copper composites with graphene oxide sheets of different lateral sizes were prepared and their effects on the properties of the composites were investigated. It was found that the distribution and performance varied with the size of graphene sheets in the composites. This study contributes to a better understanding of the formation mechanism of hierarchical layered graphene/copper composites and the development of composite structural design based on graphene.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Hao Li, Xueheng Dai, Xiaoyan Han, Jianfeng Wang
Summary: Through optimizing the size and alignment of inorganic platelets and improving the interfacial interaction with polymers, intensive studies on bioinspired multilayer composites have led to the development of a new strategy of polymer chain orientation to enhance mechanical properties. By enhancing the stiffness and alignment of multiple polymer chains, a large enhancement in mechanical properties, including Young's modulus, tensile strength, and toughness, is achieved in bioinspired multilayer films consisting of oriented sodium carboxymethyl cellulose chains and alumina platelets. The increased chain orientation induces a failure mode transition in the multilayered films, leading to improved stress transfer and a highly effective increase in modulus, strength, and toughness.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Composites
Ya Wang, Zhen-Guo Liu, Yun-Peng Yi, Yu-Chen Wei, Zhi-jian Li, Yi-Bo Wang
Summary: This paper presents numerical and experimental studies on the torsional properties of 3D braided composite shafts, with a focus on the effects of yarn orientations on the shafts under torsional load. The research found that transverse shear-tension damage of longitudinally compressive yarns is critical under torsional load, with internal damage being more severe than surface damage in the final failure morphology. Additionally, the study reports on the effects of braid processing parameters on torsional properties, confirming a dependency of increasing then decreasing peak values around an average braiding angle of 45°.
POLYMER COMPOSITES
(2021)