单分散的高产合成形聚合物纳米粒子
Jin-Gyu Park1, Jason D Forster, Eric R Dufresne
1Department of Mechanical Engineering, Yale University, New Haven, Connecticut 06511, USA.
Journal of the American Chemical Society
|April 9, 2010
概括
研究人员开发了一种新的方法,用于高产量生产单分散的,贝形的聚合物纳米粒子. 这种技术利用种子聚合,为先进的材料应用创造精确控制的纳米粒子形态.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 制造具有特定形状的单分散聚合物纳米粒子具有挑战性.
- 不同类型的粒子对于先进的材料组装至关重要,例如光子晶体.
研究的目的:
- 开发一种高产率的方法来合成高度单分散的,形的聚合物纳米粒子.
- 为了控制这些异构型纳米粒子的形态和尺寸.
主要方法:
- 利用以核心外聚合物颗粒作为种子的种子聚合.
- 采用聚乙烯核心与聚乙烯-co-trimethoxysilylpropylacrylate外.
- 通过调整单体体积相对于种子颗粒来控制纳米粒子叶片大小.
主要成果:
- 实现了单分散的形聚合物纳米粒子的极高产量.
- 纳米粒子的尺寸大约为几百纳米.
- 对形形状的两个叶片的相对大小进行了控制.
结论:
- 描述的种子聚合方法是有效的产生异型聚合物纳米粒子.
- 这些精确形状的纳米粒子适合光子晶体组装.
- 该技术为创建功能性纳米材料提供了一个可扩展的方法.
相关概念视频
Ziegler–Natta Chain-Growth Polymerization: Overview
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta catalyst, high molecular...
Molecular Weight of Step-Growth Polymers
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...


