Self-reinforced thermoplastic polyurethane composite with excellent mechanical properties, heat resistance and sustainable recycling

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-02-24 DOI:10.1016/j.compositesb.2025.112342

Xiulu Gao, Huan Qian, Jiaqi Wang, Yuxuan Hong, Yichong Chen, Ling Zhao, Dongdong Hu

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引用次数: 0

Abstract

The traditional reinforcement and toughening approaches of thermoplastic polyurethane (TPU) fail to adequately address the mechanical properties, compatibility and recyclability of TPU composites. In this study, the self-reinforced TPU composite was successfully prepared by introducing self-reinforced fiber structure. The reinforced fibers and matrix phase had the same chemical composition, and the reinforced fibers could be uniformly distributed in the TPU matrix. The fibril network structure formed by reinforced fibers enhanced the rheological properties of self-reinforced TPU composites. The hydrogen bond interactions between reinforced fibers and TPU matrix improved the micro-phase separation structure. The fibril network and excellent interfacial interactions significantly enhanced the strength and toughness of TPU matrix. When the reinforced fiber content was 7 wt%, the tensile strength, elongation at break and tensile toughness of TPU7 were increased by 58.2 %, 107.1 % and 210.3 %, respectively. The introduction of reinforced fibers increased the heat resistance of TPU composites by 20–30 °C. After ten-times closed-loop recycling process, the elongation at break of TPU7 only decreased by 11.0 %. This work provides a solution strategy for preparing TPU composites with ultra-high mechanical properties, thermal stability and sustainable recycling-reprocessing.

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.