基于热塑性聚氨酯/聚乳酸/聚苯胺共混物的4D打印光/热响应形状记忆复合材料

IF 1.8 4区化学 Q3 POLYMER SCIENCE

High Performance Polymers Pub Date : 2022-11-04 DOI:10.1177/09540083221135499

Yanmei Wang, Yanen Wang, Minyan Liu, Q. Wei, B. Du

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引用次数: 1

摘要

本工作采用熔融沉积法制备了一系列不同重量比的聚乳酸/热塑性聚氨酯/聚苯胺（PLA/TPU/PANI）共混物。然后，研究了不同长丝成型和印刷工艺参数对印刷分辨率和质量的影响。接下来，通过傅立叶变换红外光谱（FTIR）、热重分析（TGA）、扫描电子显微镜（SEM）和力学实验对印刷样品进行了表征。FTIR和TGA的结果表明，不同组分之间没有化学反应，在SEM中观察到材料的均匀分布。样品的拉伸和压缩曲线呈倒U形。最后，用差示扫描量热法对其形状记忆性能进行了评价。对于PLA/TPU共混物，U8A2具有最佳的形状记忆能力（R=80.8%，Rf=100%）。基于PLA/TPU优异的形状记忆性能，PANI的加入可以引入光致机构来形成二元驱动的形状记忆材料。本文制备的复合材料可应用于组织工程支架、医疗器械、软机器人等

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4D printing light-/thermo-responsive shape memory composites based on thermoplastic polyurethane/polylactic acid/polyaniline blends

In this work, a series of polylactic acid/thermoplastic polyurethane/polyaniline (PLA/TPU/PANI) blends with different weight ratios were prepared by Fused deposition molding First, six groups of PLA/TPU (U9A1/U8A2/U7A3/U6A4/U5A5/U4A6) and three groups of PLA/TPU/PANI (821/823/825) with different ratios were fabricated by melt blending. Then, the effects of different filament forming and printing process parameters on print resolution and quality were investigated. Next, printed samples were characterized by Fourier transform infrared (FTIR), Thermogravimetric analysis (TGA), Scanning electron microscopy (SEM) and mechanical experiments. The results of FTIR and TGA showed no chemical reaction between different components, and uniform distribution of the material was observed in the SEM. The tensile and compressive curves of the samples showed an inverted U-shape. Finally, the shape-memory property was evaluated by differential scanning calorimetry. For PLA/TPU blends, U8A2 had the best shape memory capability ( R r = 80.8% and R f = 100%). Based on the excellent shape memory performance of PLA/TPU, the addition of PANI can introduce a light-actuated mechanism to form a binary-driven shape memory material. The composite materials prepared in this work can be applied to tissue engineering scaffolds, medical devices, soft robots and so on. Graphical Abstract

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来源期刊

High Performance Polymers 化学-高分子科学

CiteScore

4.20

自引率

14.30%

发文量

106

审稿时长

1.2 months

期刊介绍： Health Services Management Research (HSMR) is an authoritative international peer-reviewed journal which publishes theoretically and empirically rigorous research on questions of enduring interest to health-care organizations and systems throughout the world. Examining the real issues confronting health services management, it provides an independent view and cutting edge evidence-based research to guide policy-making and management decision-making. HSMR aims to be a forum serving an international community of academics and researchers on the one hand and healthcare managers, executives, policymakers and clinicians and all health professionals on the other. HSMR wants to make a substantial contribution to both research and managerial practice, with particular emphasis placed on publishing studies which offer actionable findings and on promoting knowledge mobilisation toward theoretical advances. All papers are expected to be of interest and relevance to an international audience. HSMR aims at enhance communication between academics and practitioners concerned with developing, implementing, and analysing health management issues, reforms and innovations primarily in European health systems and in all countries with developed health systems. Papers can report research undertaken in a single country, but they need to locate and explain their findings in an international context, and in international literature.