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用3D打印的水凝作为光热执行器

Melanie M Ghelardini1, Martin Geisler2, Niclas Weigel2

  • 1Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 生物医学工程 生物医学工程
  • 聚合物科学 聚合物科学

背景情况:

  • 热反应性水凝在温度变化时表现出体积相变.
  • 黄金纳米棒 (GNRs) 可以在光照射后产生热量,从而实现光热效应.
  • 3D打印可以精确控制复杂的水凝结构.

研究的目的:

  • 开发3D打印的热敏水凝,能够通过光热加热改变形状.
  • 为执行器应用研究GNR在水凝矩阵中的结合和稳定性.
  • 为了评估这些复合水凝在不同的加热条件下的性能.

主要方法:

  • 使用聚N-异烯胺 (PNIPAAm) 宏和牛血清白蛋白 (BSA) 功能化的GNRs制造带GNR的墨水.
  • 直接将水凝墨水写入一个乙化凝支矩阵中.
  • 照片交叉连接并随后移除支结构.
  • 使用对流和光热加热测试水凝执行器性能,分析收缩,膨胀和GNR稳定性.

主要成果:

  • 成功地通过3D打印了嵌入BSA-GNR的均质和光学透明的PNIPAAm水凝.
  • 无论是对流和光热加热都诱导了由于PNIPAAm相位过渡的可逆凝收缩.
  • 在多个启动周期中,BSA-GNR在水凝结构内保持稳定.
  • 在一些结构中观察到可逆的内部曲在重生时,可以通过振动恢复.

结论:

  • 证明了使用3D打印,GNR嵌入式热响应水凝作为光响应执行器的可行性.
  • 开发的水凝系统对需要控制形状变化能力的应用非常有希望.
  • GNRs的稳定性和可逆启动突出显示了基于水凝的强大的设备的潜力.