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Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
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Adhesion occurs when one type of molecule is attracted to a different molecule. Water exhibits adhesive properties in the presence of polar surfaces, such as glass or cellulose in plants. For instance, when water is poured into a glass, the positively charged hydrogen molecules of water are more attracted to the negatively charged oxygen molecules in the silica than to the oxygen in neighboring water molecules.
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灵感来自Lamprey的两吸盘,具有混合粘附机制.

Lei Li1,2, Wenzhuo Gao2, Boyang Qin2

  • 1Institute of Ocean Research, Peking University, Beijing 100871, China.

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概括

研究人员开发了一种新的混合吸盘,灵感来自. 这种生物灵感的粘合剂使用形状记忆聚合物和真空吸收,在各种表面,无论是在空气中还是水下,都具有坚固,可逆的粘合力.

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科学领域:

  • 机器人和材料科学 机器人和材料科学
  • 生物启发工程 生物启发工程
  • 粘附科学 粘附科学 粘附科学

背景情况:

  • 现有的机器人抓器通常依赖于单一的粘附机制,限制了适应各种表面和环境的适应性.
  • 开发强大的,可逆的和跨介质的粘附对于先进的机器人操纵至关重要.

研究的目的:

  • 创建一个混合吸盘灵感来自Lamprey口腔吸盘增强机器人粘附.
  • 整合一个可热切换的形状记忆聚合物 (SMP) 与真空吸收,以进行自适应的抓取.

主要方法:

  • 设计了一种混合式光盘,将形状记忆聚合物 (SMP) 结合起来,以确保表面符合性,并将唇用于真空吸收.
  • 研究了在光滑和粗表面的空气和水下粘附性能.
  • 评估了剪切摩擦和长期粘附稳定性.

主要成果:

  • 混合式盘实现了高拉力 (562N在空气中,590N在水下),超过其重量的850倍.
  • 与真空单独相比,SMP集成 (377%在空气中,270%在水下) 的粘合性显著改善.
  • 在粗的表面上表现出强大的粘附性和超过26小时的安全固定.

结论:

  • 灵感来自Lamprey的混合吸盘在各种条件下提供了卓越,可适应和可逆的粘附性.
  • 这项技术使先进的机器人抓取和操纵成为可能,特别是在两应用中.
  • 为多式联接系统和两机器人铺平了道路.