Article
Engineering, Manufacturing
Takeshi Semba, Akihiro Ito, Kazuo Kitagawa, Hiromasa Kataoka, Fumiaki Nakatsubo, Takashi Kuboki, Hiroyuki Yano
Summary: By acetylating soft wood kraft pulps and melt compounding with PA6, the reinforcement effect of nanofibrillated cellulose can be enhanced, forming a network structure in the PA6 matrix and significantly improving the mechanical and thermal properties of the material.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Polymer Science
Achraf Belkhiri, Nick Virgilio, Valerie Nassiet, Helene Welemane, France Chabert, Olivier De Almeida
Summary: This study aims to control the hydroxyl groups and surface chemistry of glass particles in PA6/glass composites to facilitate polymerization and crystallization. The results suggest that a careful balance is required to maintain fast kinetics, and a high hydroxyl concentration can lead to a slowdown or inhibition of the polymerization reaction.
Article
Engineering, Manufacturing
Kok Peng Marcian Lee, Thomas Baum, Robert Shanks, Fugen Daver
Summary: The thickness of the sample does not have a large impact on EMI SE, while internal geometric designs can significantly improve it. The electromagnetic response of 3D-printed GC is limited by geometric accuracy and printing methods, particularly in replicating complex geometries.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Multidisciplinary
Minhang Chen, Tingting Yin, Peng Fu, Haibo She, Xiaomeng Zhang, Wei Zhao, Zhe Cui, Xinchang Pang, Qingxiang Zhao, Minying Liu
Summary: This study successfully explored novel polyamide 12 (PA12) based template composites with significantly improved localized and unidirectional thermally conductive property achieved through selectively distributed boron nitride (BN). The experiment and simulated results revealed that the enhanced thermally conductive property was attributed to the selectively distributed BN, enabling precise and controllable heat dissipation for high-frequency and high-speed electronic devices.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Composites
Mario Bragaglia, Lorenzo Paleari, Francesca R. Lamastra, Pietro Russo, Francesco Fabbrocino, Francesca Nanni
Summary: Boron nitride nano-platelets were functionalized with oleylamine using a simple method without ultrasonication. The functionalization resulted in the formation of coordination bonds between the boron nitride nano-platelets and the oleylamine molecules. The oleylamine functionalization led to the production of composites with higher mechanical properties and improved thermal conductivity compared to the untreated samples.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Menglong Xu, Linfeng Wei, Li Ma, Jiawei Lu, Tao Liu, Ling Zhang, Ling Zhao, Chul B. Park
Summary: The study successfully fabricated microcellular foamed polyamide 6/carbon nanotube composites with high-efficiency electromagnetic wave absorption using supercritical CO2 foaming. This eco-friendly and versatile methodology offers a simple way to develop flexible polymer-based electromagnetic wave absorbents.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
Hideyuki Uematsu, Kotaro Mune, Shunya Nishimura, Koutarou Koizumi, Ayaka Yamaguchi, Shinji Sugihara, Masachika Yamane, Kazumasa Kawabe, Yukihiro Ozaki, Shuichi Tanoue
Summary: The study found that the mechanical properties of PA6/CF composites varied depending on the surface texture of the carbon fibers, with similar flexural strength and modulus but significant differences in impact absorption capacity and fracture patterns. It was also discovered that the distribution of PA6 crystals between CFs was related to the failure behavior of PA6/CF laminates.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Polymer Science
Min-Kyeom Kim, Hyung-Ick Kim, Jae-Do Nam, Jonghwan Suhr
Summary: This study systematically explores the toughening mechanism of thermoplastic polymer particle materials and ways to overcome the typical compromise in energy-absorbing composites through modeling and experimental research. The main energy-absorbing mechanism was found to be matrix yielding, which results from particle debonding and significantly contributes to crack propagation.
Article
Polymer Science
Wenyi Xu, Liguo Yu, Ke Chen, Run Zhang, Ping Xue, Mingyin Jia
Summary: A dual-nozzle 3D printing technique was developed to fabricate continuous glass fiber reinforced PA6 composites with sandwich structure. The surface layer was printed with short glass fiber reinforced PA6 filament, while the inner part was printed with CGF/PA6 filament to provide high mechanical performance. The optimized printing process parameters resulted in composites with excellent mechanical properties, making them suitable for various industrial applications such as aerospace, automotive, wind turbine blades, and shipbuilding.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Pietro Russo, Francesca Cimino, Antonio Tufano, Francesco Fabbrocino
Summary: The study showed that PA6 composites filled with graphene nanoplatelets exhibit slight improvement in thermal stability, but significant advantages in terms of tensile and flexural properties compared to the neat matrix. The filler content of graphene nanoplatelets has a notable impact on the strength parameter. However, when the content of GNPs exceeds 3%, the predictable worsening of graphene sheet dispersion affects the ultimate performance of the more concentrated formulation.
Article
Materials Science, Multidisciplinary
Yufei Liu, Yikai Zhan, Min He, Chengjun Xiao, Shan Liu, Shuhao Qin, Jie Yu
Summary: Polyamines with different amino numbers were grafted onto the surface of carbon fiber to improve the interfacial properties and mechanical properties of carbon fiber/polyamide 6 composites.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Composites
Chun Yan, Pengwei Yan, Haibing Xu, Dong Liu, Gang Chen, Guangbin Cai, Yingdan Zhu
Summary: The influence of hexaphenoxycyclotriphosphazene (HPCTP) on the mechanical properties of GF/PA6 composites was studied, showing no obvious effect on tensile properties but a decrease in flexural and interlaminar shear strength with the addition of 30% HPCTP. The flame retardancy mechanism of GF/PA6/30%HPCTP composites involves releasing incombustible gases in the gas phase and forming char layers in the condensed phase.
POLYMER COMPOSITES
(2022)
Article
Engineering, Multidisciplinary
Hanyin Guo, Tongle Xu, Shuaishuai Zhou, Fang Jiang, Liyuan Jin, Na Song, Peng Ding
Summary: ISP-PN composites prepared by in-situ polymerization and melt blending exhibit enhanced thermal conductivity and mechanical properties, with high volume resistivity to prevent filler re-aggregation.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Composites
Shuaishuai Zhou, Tongle Xu, Fang Jiang, Na Song, Peng Ding
Summary: This study demonstrates a flexible PAI/f-BNNSs composite film with high in-plane thermal conductivity, superior electrical insulation, and improved mechanical properties through the design of functionalized BN nanosheets. Systematic research on the degree of functionalization, defect quantities of f-BNNSs, and composite film performance revealed the mechanism of thermal conductivity improvement in PAI/f-BNNSs composite films.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Polymer Science
Michael Cordin, Avinash P. Manian, Thomas Bechtold, Tung Pham
Summary: Thermoplastic all-polymer composites, made from the same material for reinforcing fibers and matrix material, have become increasingly popular due to their potential for recycling compared to traditional composites with inorganic reinforcements. This study proposes a new preparation concept for all-polyamide composites using a hybrid yarn of polyamide-6 and polyamide-66 fibers. By embroidering the hybrid yarn in the desired direction on a polyamide-6 fabric, composites with desired reinforcing fiber orientation can be prepared, maintaining the integrity of the reinforcing and unmelted PA66 fibers embedded in a molten PA6 matrix during thermoforming at 230 degrees C. The mechanical properties of these composites, including different matrix-to-reinforcement ratios and reinforcing fiber orientations, are characterized using quasi-static and high-speed tensile tests as well as penetration tests.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
