电纺丝法调节生物基聚(L-乳酸)/硅藻土复合纤维的结晶和压电特性

IF 23.2 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Jing Zhao, Tao Li, Haoyang Sun, Zhengyang Lu, Tiancheng Xiong, Dandan Li, Dazhi Sun
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引用次数: 0

摘要

可降解聚乳酸(PLLA)被认为是一种柔性压电材料,它克服了脆性压电陶瓷和不可降解压电聚合物材料的局限性。聚乳酸的压电特性与其结晶度和晶相结构密切相关。本研究采用天然硅藻土(DE)来调整聚乳酸的结晶行为和压电特性。通过电纺丝制备了具有增强压电特性的 PLLA/DE 生物可降解复合纤维。我们的研究结果表明,DE 可作为成核剂,促进 α 相晶体的形成,从而提高 PLLA 的结晶度、杨氏模量和压电特性。由含有 5 wt% DE 的 PLLA/DE 复合纤维制成的压电器件的输出电压是纯 PLLA 样品的近 2.5 倍,同时在 1000 次循环后仍表现出卓越的稳定性。所开发的 DE/PLLA 复合纤维具有良好的柔韧性、高压电性能和可降解性,可以很容易地集成到器件中,生产出适合环保应用的高性能压电材料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Regulated crystallization and piezoelectric properties of bio-based poly(L-lactic acid)/ diatomite composite fibers by electrospinning

Biodegradable poly(L-lactic acid) (PLLA) is recognized as a flexible piezoelectric material that overcomes the limitations of brittle piezoelectric ceramics and non-degradable piezoelectric polymer materials. The piezoelectric properties of PLLA are closely associated to its crystallinity and crystal phase structure. In this study, natural diatomite (DE) is used to adjust the crystallization behaviors and piezoelectric properties of PLLA. The PLLA/DE biodegradable composite fibers with enhanced piezoelectric properties were prepared via electrospinning. Our findings show that DE act as nucleating agents, facilitating the formation of α-phase crystals and thereby enhancing the crystallinity, Young’s modulus, and piezoelectric properties of PLLA. The piezoelectric device fabricated from the PLLA/DE composite fibers containing 5 wt% DE demonstrates an output voltage nearly 2.5 times greater than that of the neat PLLA sample, while also exhibiting excellent stability even after 1000 cycles. With good flexibility, high piezoelectric performance, and degradability, the developed DE/PLLA composite fibers can be easily integrated into devices to produce high-performance piezoelectric materials suitable for environmentally friendly applications.

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来源期刊
CiteScore
26.00
自引率
21.40%
发文量
185
期刊介绍: Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.
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