通过机械坚固的共价可适应的网络形状记忆聚合物重构4D打印.
Honggeng Li1,2,3, Biao Zhang4, Haitao Ye1,2,5
1Shenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Southern University of Science and Technology, Shenzhen, China.
Science advances
|May 15, 2024
概括
本研究介绍了机械强的共价适应性网络形状记忆聚合物 (CAN-SMPs),用于可重新配置的4D打印. 这些先进的材料使复杂的3D结构能够多次改变形状,克服传统热的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 增材制造 增材制造 增材制造
背景情况:
- 4D打印利用形状记忆聚合物 (SMP) 来创建结构,以应对刺激而改变形状.
- 目前用于4D打印的SMP通常是具有单一永久形状的热,限制了重新配置.
- 现有的共价可适应网络SMP (CAN-SMP) 具有较弱的热力学性能,阻碍了实际应用.
研究的目的:
- 为可重新配置的4D打印开发机械强大的CAN-SMP (MRC-SMP).
- 克服现有的CAN-SMPs在热力学性能和形状重构性方面的局限性.
- 展示MRC-SMPs在创建复杂,多任务的4D打印结构方面的潜力.
主要方法:
- 合成的机械坚固的共价适应性网络形状记忆聚合物 (MRC-SMP).
- 描述了热力学特性,包括可变形性 (>1400%) 和玻璃过渡温度 (75°C).
- 利用数字光处理 (DLP) 高分辨率3D打印,用MRC-SMPs制造复杂结构.
主要成果:
- 在开发的MRC-SMP中实现了高可变形性和高玻璃过渡温度 (75°C).
- 使用DLP证明了高可打印性,使得复杂的3D结构可以创建.
- 在大变形下多次成功重新配置复杂的SMP 3D结构,显示了完成多个任务的潜力.
结论:
- 机械上坚固的CAN-SMP (MRC-SMP) 可实现实用的重配置4D打印.
- 与现有材料相比,开发的MRC-SMP提供了优越的热力学性能和可打印性.
- 使用MRC-SMP的可重新配置4D打印可以创建能够执行多个功能的多功能结构.
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