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相关概念视频

Fluid Mosaic Model01:34

Fluid Mosaic Model

The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.LipidsThe most...
Fluid Mosaic Model01:19

Fluid Mosaic Model

Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich with the analogy of...
Two-Dimensional Force System01:20

Two-Dimensional Force System

A two-dimensional system in mechanical engineering involves the analysis of motion and forces in a plane. A two-dimensional force vector can be resolved into its components as:
Three-Dimensional Force System01:30

Three-Dimensional Force System

In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
Accelerating Fluids01:17

Accelerating Fluids

When a fluid is in constant acceleration, the pressure and buoyant force equations are modified. Suppose a beaker is placed in an elevator accelerating upward with a constant acceleration, a. In the beaker, assume there is a thin cylinder of height h with an infinitesimal cross-sectional area, ΔS.
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
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有结合的多模式液晶弹性体执行器.

Roshan Nasare1, Hongshuang Guo1, Arri Priimagi1

  • 1Smart Photonic Materials, Faculty of Engineering and Natural Sciences, Tampere University, Tampere, P.O. Box 541, FI-33101, Finland. hongshuang.guo@tuni.fi.

Journal of materials chemistry. B
|January 3, 2025
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的液晶弹性体 (LCE),具有形状记忆,湿度敏感性和光激活运动. 这种可适应的材料在各种环境中提供了多功能软执行器应用.

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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:

  • 液晶弹性体 (LCEs) 是一种先进的材料,以刺激反应和可逆变形特性而闻名.
  • 将动态键融入LCE中可以提高可编程形状变形和环境适应性.
  • 动态LCE的新型设计对于扩大其应用至关重要.

研究的目的:

  • 开发一种具有集成形状记忆编程,湿度灵敏度和光化学作用的超分子LCE.
  • 通过操纵超分子交叉链接来探索LCE的双重功能.
  • 在不同的环境条件下展示多功能软执行器功能.

主要方法:

  • 制造一种超分子LCE,利用键交叉连接用于形状记忆和光化学作用.
  • 化学处理 (基处理) 来破坏超分子交叉链接,诱导湿度敏感和湿度敏感的特性.
  • 在干燥和湿条件下,在光刺激下测试软执行器性能.

主要成果:

  • 开发的LCE表现出形状记忆功能,允许可编程任意形状和光化学执行.
  • 基处理可逆地将LCE转化为对湿度变化敏感的湿度显微材料,同时保持光化学变形性.
  • 在空气和水下表现出明显的软执行器行为,突出显示了材料的多功能性.

结论:

  • 超分子LCE提供了形状记忆,湿度敏感性和光化学控制的独特组合.
  • 在不同的响应状态之间切换的能力提高了基于LCE的软执行器的可编程性和适用性.
  • 这项工作扩大了动态LCE的设计空间,为复杂的仿生设备铺平了道路.