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相关概念视频

Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

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In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
Anchoring junctions mechanically attach a cell to the...
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相关实验视频

Updated: Jun 21, 2025

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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机械互锁的聚合物纹对刺激有反应.

Mengling Yang1, Shuai Chen1, Zhaoming Zhang1

  • 1School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, PR China.

Nature communications
|July 9, 2024
PubMed
概括

研究人员使用双交联网络开发了智能人造纹. 这种创新的设计使得可控擦除纹和现场再生,克服了先进智能应用当前方法的局限性.

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Environmentally-controlled Microtensile Testing of Mechanically-adaptive Polymer Nanocomposites for ex vivo Characterization
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相关实验视频

Last Updated: Jun 21, 2025

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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
  • 纳米技术纳米技术

背景情况:

  • 人工纹是智能应用的关键,但现场再生具有挑战性.
  • 现有的方法通常依赖于网络重新安排,阻碍了再生.

研究的目的:

  • 开发具有响应式擦除和现场再生能力的人造纹.
  • 为了克服当前纹调制技术中网络重排的局限性.

主要方法:

  • 合成了一种结合 [2] 罗他森和四重结交联的双重交联网络.
  • 通过酸性 (解离) 和性 (宿主-客人干扰) 刺激实现了纹调节.
  • 研究了 [2]rotaxane 的滑动运动和结稳定性的作用.

主要成果:

  • 酸刺激导致通过网络破坏快速消除纹,但阻止了现场再生.
  • 性刺激通过破坏主机与客人的互动,导致纹逐渐消失,从而使网络保持完整.
  • 完好无损的网络使得性诱导的擦除后的表面微结构能够在现场恢复.
  • 键和机械键的正交响应性允许多次,精确的纹模式控制.

结论:

  • 双重交叉连接的网络提供了对纹擦除和现场再生的直角控制.
  • [2]rotaxane交叉连接对于应力消散至关重要,并在再生过程中实现网络完整性.
  • 这种方法为具有可调微结构的先进智能表面提供了一条途径.