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相关概念视频

Microcracking in Concrete01:20

Microcracking in Concrete

111
Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
111

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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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针对可编程粘合剂的多尺度裂捕获.

Seongjin Park1, Dong Kwan Kang1, Donghyuk Lee1

  • 1Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.

Science advances
|September 11, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种具有微型和宏观架构的新型混合粘合剂,用于先进的粘合控制. 这项创新提高了粘附强度,并使可编程释放,导致可重复使用,皮肤友好的粘合贴.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 粘附科学 粘附科学 粘附科学
  • 生物材料工程 生物材料工程

背景情况:

  • 在粘接接口中精确控制裂传播对于开发高性能智能粘合剂至关重要.
  • 现有的研究主要集中在微观或宏观的裂传播上,限制了全面的粘附控制.
  • 存在需要的粘合剂,提供多级裂纹管理,以增强粘合力和控制脱落.

研究的目的:

  • 开发一种混合粘合剂,集成微架构和宏观非线性切割架构,以实现更高的粘合控制.
  • 为了实现同时在多个尺度上捕捉裂,以获得高粘合能力.
  • 通过受控的宏观裂传播来实现可编程释放和可重复使用.

主要方法:

  • 在混合粘合系统中集成微型架构和宏观非线性切割架构.
  • 设计允许符合规格的固定和多尺度的裂捕获.
  • 用于功能演示的集成电子产品制造皮肤粘合贴片.

主要成果:

  • 通过多尺度裂捕获,粘附增强超过70倍.
  • 在任何位置独立控制粘附强度和方向性.
  • 可透气,无伤害,坚固,易拆卸的皮肤粘合贴的演示.
  • 成功地与用于虚拟现实应用的运动检测和无线信号传输的电子设备进行集成.

结论:

  • 开发的混合粘合剂通过管理跨多个尺度的裂传播,提供无与伦比的粘合控制.
  • 创新的设计促进了高粘合能力和可编程释放,使其可重复使用.
  • 由此产生的皮肤粘合贴具有多功能性,提供强度,透气性和轻松移除的组合,在可穿戴电子产品和虚拟现实中具有潜在的应用.