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在水性介质中保存的叶状纳米乳液中的扩散聚合物接口
Ginam Kim1, Alioscka Sousa, Deborah Meyers
1Dow Corning Corporation, Science and Technology, Midland, Michigan 48640, USA. g.kim@dowcorning.com
Journal of the American Chemical Society
|May 18, 2006
概括
研究人员发现,纳米聚合物中的聚合物接口由于动力捕获而分散,而不是平衡. 这一发现为在合成过程中控制聚合物纳米结构接口提供了新的方法.
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:
- 聚合物纳米结构经常表现出不同的接口.
- 均衡热力学预测了不混合的聚合物在纳米尺度上的尖接口.
研究的目的:
- 为了研究二相纳米聚合物中的聚合物-聚合物接口的性质.
- 了解影响多元组件聚合物纳米结构接口形成的因素.
主要方法:
- 低温扫描传输电子显微镜 (STEM) 的应用
- 价值电子能量损失光谱学 (EELS) 是一种技术.
主要成果:
- 在聚甲基 (PDMS) 和共聚合物 (甲基烯酸-甲基烯酸-乙烯酸) 纳米聚合物中的聚合物-聚合物接口被观察到是扩散的.
- 这种分散的接口偏离了基于平衡热力学的预测.
- 在PDMS阶段内,共聚合物的动力捕获被确定为扩散界面的原因.
结论:
- 非平衡路径可以导致纳米聚合物中的扩散聚合物接口.
- 动力捕捉提供了一种机制来控制多元组件聚合物系统中的界面特性.
- 结果表明,合成聚合物纳米结构的新策略具有量身定制的接口.
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