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相关概念视频

Poisson's Ratio01:23

Poisson's Ratio

444
Poisson's ratio is a material property that indicates their stress response. It explains the connection between the elongation or compression a material undergoes in the direction of an applied force and the contraction or expansion it experiences perpendicular to that force. When a slender bar is loaded axially, it stretches in the direction of the force and contracts laterally. Poisson's ratio is the negative ratio of this lateral contraction to the axial elongation. The negative sign...
444
Plastic Behavior01:21

Plastic Behavior

200
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
200

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相关实验视频

Updated: Jul 11, 2025

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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聚氨弹性体的变形诱导光可编程图案,基于波桑效应.

Shuzhen Yan1, Xinlu Deng2, Shuai Chen1

  • 1School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai, 200240, China.

Advanced materials (Deerfield Beach, Fla.)
|November 6, 2023
PubMed
概括

研究人员开发了一种新方法,使用梯度光交联和Poisson效应在聚氨弹性体上创建高比例表面图案. 这种技术允许可调节的图案和结构颜色,对软机器和智能设备有用.

关键词:
波桑效应是什么意思? 波桑效应是什么意思?动态调节 动态调节梯度的照片交叉连接图案设计 图案设计结构色彩 结构色彩

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Capillary Force Lithography for Cardiac Tissue Engineering
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相关实验视频

Last Updated: Jul 11, 2025

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Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
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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
  • 软机器人软机器人 软机器人软机器人

背景情况:

  • 具有高比例表面图案的弹性体是先进软机械的关键.
  • 在弹性体上制造精确和可调整的表面图案仍然是一个挑战.

研究的目的:

  • 展示一种在聚氨弹性体上制造高比例表面图案的简单方法.
  • 探索通过波桑效应和梯度光交联来操纵图案面积比.
  • 研究这些有图案的弹性体的潜在应用.

主要方法:

  • 使用梯度光交叉连接,通过选择性光二分化安素功能化聚氨弹性体 (ANPU).
  • 应用单轴拉伸应变来操纵图案面积比.
  • 使用有限元分析来理解应力分布和聚合物链迁移.
  • 标志着可调节的结构色彩和图案的可逆性.

主要成果:

  • 在ANPU弹性体上成功制造了高比例的表面图案.
  • 通过控制拉伸和梯度交叉连接来证明可调节模式的比例.
  • 观察到可逆的结构性颜色变化随着变化的应变.
  • 有限元分析证实了应力调节和聚合物链迁移导致模式形成.

结论:

  • 开发的方法提供了一种创新的方法,用于在弹性体上创建可调节的,高比例的表面图案.
  • 图案弹性体呈现可逆结构颜色,适合智能显示器和防伪.
  • 这种技术有望用于可拉伸式应变传感器和先进软机的应用.