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Thermosensation01:43

Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

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Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
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Mechanism of heat transfer01:19

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Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
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Updated: Jul 10, 2025

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
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Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

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在温度传感多材料架构中的适应性响应的算法编码.

Weichen Li1, Yue Wang2, Tian Chen2

  • 1Department of Civil and Environmental Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA.

Science advances
|November 22, 2023
PubMed
概括

研究人员开发了可编程的软元材料,具有可调节的温度切换机械反应. 这一进步使适应性材料具有环境意识的智能,可用于新型应用.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程
  • 聚合物科学 聚合物科学

背景情况:

  • 可编程物质旨在创建可以根据需求改变物理性质的材料.
  • 由于非线性变形,开发具有可编程响应的软元材料的合理设计策略仍然具有挑战性.
  • 现有的软元材料缺乏对其机械反应的系统控制.

研究的目的:

  • 系统地创建具有任意可编程,温度可切换的非线性机械反应的软元材料.
  • 为了使软元材料能够具有很大的变形和可调节的机械行为.
  • 将环境意识的智能赋予结构和材料.

主要方法:

  • 用计算形态生成来进行理性设计.
  • 使用多材料聚合物3D打印进行制造.
  • 利用聚合物的不同玻璃过渡温度来控制度的变化.

主要成果:

  • 在大变形下成功创建了具有可编程温度切换的非线性机械反应的软元材料.
  • 通过优化聚合物合成,证明可控制的局部和巨型刚性变化.
  • 产生的复杂结构呈现出根本不同的,可编程的非线性力-位移关系和变形模式,随着温度的变化.

结论:

  • 合理的设计和制造方法使得目标导向的元材料合成成为可能.
  • 在软元材料中实现了可自由调节的热适应性行为.
  • 建立了一条创造环保智能材料和结构的途径.