Investigations into 4D printed PLA/graphite composite with thermal induced shape memory effect

Rapid Prototyping Journal Pub Date : 2024-07-08 DOI:10.1108/rpj-12-2023-0429

Kunal Arora, Mohit Kumar, Varun Sharma

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Abstract

Purpose The paper aims to fabricate shape memory composites using polylactic acid (PLA) matrix and graphite. Shape memory polymers are a promising family of materials for biomedical applications because of their favourable mechanical properties, fast reactions and good biocompatibility. For most SMPs, however, achieving controllable sequential shape change is challenging. Design/methodology/approach In the present work, 4D printing technology is used to fabricate shape memory composites using polylactic acid (PLA) matrix and graphite. A comparative study of pure PLA and graphite’s different weight % composition has been done. Findings By carefully managing the deformation state, PLA with graphite shape memory composites produced controllable sequential deformation with an amazing shape memory effect. Surface morphology, thermal properties, melt flow index and shape recovery tests have all been carried out to assess the qualities of manufactured samples. Originality/value This is a one-of-a-kind to fabricate shape memory composites using graphite and a PLA matrix. Thus, this research attempts to deliver the possible use of PLA/graphite composites fabricated using 4D printing in robotics and biomedical devices. Graphical Abstract

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具有热诱导形状记忆效应的 4D 印刷聚乳酸/石墨复合材料研究

目的本文旨在利用聚乳酸（PLA）基体和石墨制造形状记忆复合材料。形状记忆聚合物具有良好的机械性能、快速反应和良好的生物相容性，是一种很有前景的生物医学应用材料。然而，对于大多数形状记忆聚合物来说，实现可控的连续形状变化具有挑战性。在本研究中，利用 4D 打印技术，使用聚乳酸（PLA）基质和石墨制造形状记忆复合材料。研究结果通过仔细管理变形状态，聚乳酸与石墨形状记忆复合材料产生了可控的连续变形，并具有惊人的形状记忆效果。为了评估制造样品的质量，还进行了表面形态、热性能、熔体流动指数和形状复原测试。因此，这项研究试图提供利用 4D 打印技术制造的聚乳酸/石墨复合材料在机器人和生物医学设备中的可能用途。

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Rapid Prototyping Journal

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