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Magnetic and Thermal-sensitive Poly(N-isopropylacrylamide)-based Microgels for Magnetically Triggered Controlled Release
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具有纳米相分离结构的温度敏感共聚合物微凝.

Martina Keerl1, Jan Skov Pedersen, Walter Richtering

  • 1Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056 Aachen, Germany.

Journal of the American Chemical Society
|February 12, 2009
PubMed
概括

这项研究显示,共聚合物微凝具有明显的N-异甲胺 (PNIPAM) 和N-异甲胺 (PNIPMAM) 区域. 一个新的模型显示这些微凝在它们的过渡温度下表现出相分离的纳米领域.

科学领域:

  • 聚合物科学 聚合物科学
  • 材料科学 材料科学 材料科学
  • 纳米技术 纳米技术

背景情况:

  • 热敏微凝是响应的聚合物网络.
  • 同聚合物微凝通过结合不同的单体提供可调节的特性.
  • 了解内部结构是控制微凝行为的关键.

研究的目的:

  • 分析来自热敏共聚合物微凝的小角度中子散射数据.
  • 开发和应用微凝分析的新形式因子模型.
  • 在它们的过渡温度下研究共聚物微凝的内部形态.

主要方法:

  • 小角度中子散射 (SANS) 实验. 小角度中子散射 (SANS) 实验.
  • 开发一种包含纳米相分离的新型形状因子模型.
  • 分析散射曲线以确定内部结构.

主要成果:

  • 在共聚合物微凝的过渡温度下,SANS数据显示出一个特殊的散射曲线形状.
  • 一个新的形式因子模型准确地描述了实验数据.
  • 该模型表明微凝内的纳米相分离的内部形态.
  • 在过渡温度下,观察到缩的PNIPMAM域和胀的PNIPMAM区域.

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Synthesis of Stimuli-responsive Nanogels using Aqueous One-step Crosslinking and Co-nanopolymerization
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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

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Synthesis of Stimuli-responsive Nanogels using Aqueous One-step Crosslinking and Co-nanopolymerization

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结论:

  • 同聚合物微凝具有独特的内部结构,具有明显的相隔域.
  • 开发的形状因子模型对于表征复杂的微凝形态是有效的.
  • 一合成可以产生复杂的材料与纳米级相位分离.