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相关概念视频

Modified-Release Drug Delivery Systems: Stimuli-Activated01:30

Modified-Release Drug Delivery Systems: Stimuli-Activated

Stimuli-activated drug delivery systems are designed to release drugs in response to specific physical, chemical, or biological stimuli. These systems often utilize hydrogels—three-dimensional, hydrophilic polymer networks capable of swelling in aqueous environments and retaining significant fluid volumes. Upon exposure to particular stimuli, these hydrogels undergo structural transitions that allow the embedded drug to be released. Due to this adaptive behavior, such systems are also called...

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聚氨形状记忆聚合物/pH响应性凝混合物用于双功能协同执行.

Shuyi Peng1, Xingyu Cao1, Ye Sun1

  • 1State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China.

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概括

这项研究介绍了一种新的混合动力执行器,它结合了形状记忆聚合物和水凝. 这种新材料为复杂的多形状驱动提供了可重复编程,克服了一次性智能材料的局限性.

关键词:
调动器的使用情况.生物模拟学是一种生物模拟学.可以编程的可编程性.形状记忆的聚合物和聚合物.对刺激有反应的水凝.

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科学领域:

  • 智能材料科学 智能材料科学
  • 聚合物科学 聚合物科学
  • 软机器人软机器人 软机器人软机器人

背景情况:

  • 响应刺激的执行水凝提供复杂的变形,但受到一次性使用编程的限制.
  • 现有的异型凝具有一次性编程能力,限制了它们的应用范围.

研究的目的:

  • 开发一种具有复杂刺激响应变形的新型多可编程混合动力执行器.
  • 通过结合形状记忆聚合物和水凝来克服传统水凝的单次激活限制.

主要方法:

  • 使用聚氨形状记忆聚合物 (PU SMP) 和聚烯酸 (PAA) 水凝制造双层混合动力执行器.
  • 使用基于纤维素纤维的餐巾和紫外线粘合剂,在SMP和水凝层之间进行强大的粘合.
  • 通过在热水中塑造和在冷水中固定来编程双层混合板,使多重重复的形状变化成为可能.

主要成果:

  • 混合动力执行器表现出高的形状固定比率 (高达88.92%) 和25.71°/分钟的执行速度.
  • 该材料至少成功编程和重新编程了九次,实现了各种1D,2D和3D形状 (曲,折叠,螺旋).
  • 开发了生物模拟器件,如"爪","松鼠"和"章鱼",以展示复杂的操作.

结论:

  • 开发了一种新的SMP/水凝混合动力执行器,具有出色的多重重复可编程性.
  • 这种混合材料可以从单个设备中实现复杂的,对刺激有反应的执行,克服了以前的局限性.
  • 这项工作提出了设计先进软智能材料和系统的新策略.