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具有疏水性和疏水性链的无离子表面活性剂用于纳米粒子分散和形状记忆的聚合物纳米复合材料

Motoyuki Iijima¹, Murino Kobayakawa, Miwa Yamazaki

¹Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan. motoyuki@cc.tuat.ac.jp

Journal of the American Chemical Society

|October 27, 2009

概括

研究人员开发了一种新型表面活性剂,以封闭二氧化 (TiO2) 纳米颗粒,提高它们在溶剂和聚合物中的分散性. 这一创新使得能够创建具有形状记忆特性的先进聚合物复合材料.

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
纳米技术纳米技术

背景情况:

纳米粒子分散对于先进的材料特性至关重要.
对二氧化 (TiO2) 纳米颗粒的表面修饰具有挑战性.
在复合材料应用中,在聚合物中实现稳定的纳米粒子分散是必不可少的.

研究的目的:

为了合成一种用于纳米粒子封闭的新型阳离子表面活性剂.
为了提高TiO2纳米颗粒在有机溶剂和聚合物中的分散性.
研究含有表面修饰TiO2纳米粒子的聚合物复合材料的特性.

主要方法:

一种含有水友性PEG链,水友性基链和乙烯基组的阳离子表面活性剂的合成.
使用合成的表面活性剂修改TiO2纳米粒子.
在各种有机溶剂 (亚,醇,,乙酸盐) 中进行分散试验.
改性TiO2纳米颗粒的纳入环氧树脂和聚甲酸 (PMMA).

主要成果:

合成的表面活性剂有效地限制了TiO2纳米粒子.
表面修饰的TiO2纳米粒子在各种有机溶剂中表现出极好的分散性.
这些纳米颗粒在热固态环氧树脂和PMMA中也可分散.
在环氧树脂中表面修饰的TiO2的聚合物复合物显示了温度诱导的形状记忆特性.

结论:

开发的阳离子表面活性剂对于修改TiO2纳米粒子是有效的.
增强的纳米粒子分散性有助于创建先进的聚合物纳米复合材料.
由此产生的纳米复合材料具有独特的特性,如温度诱导的形状记忆.

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