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›› 2008, Vol. 8 ›› Issue (6): 1245-1248.

• 材料工程专栏 • 上一篇    

树枝状大分子/聚(N-异丙基丙烯酰胺)纳米粒子的制备

刘虎 朱严瑾 易昌凤 徐祖顺   

  1. 湖北大学 湖北大学
  • 收稿日期:2008-07-29 修回日期:2008-10-06 出版日期:2008-12-20 发布日期:2008-12-20
  • 通讯作者: 徐祖顺

Preparation of Dendrimer/Poly(N-isopropyl acrylamide) Nanoparticles

  

  • Received:2008-07-29 Revised:2008-10-06 Online:2008-12-20 Published:2008-12-20

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被引次数

10

摘要： 使用溴乙酰溴对第四代聚丙烯亚胺树枝状大分子 (DAB-32)进行改性，成功合成了树枝状大分子引发剂DAB-32-Br。以DAB-32-Br/CuBr/Bpy为催化引发体系，分别在水和水/乙醇反应介质中，实现了N－异丙基丙烯酰胺（NIPAAm）的原子转移自由基聚合（ATRP），得到粒径在60－150 nm范围内的树枝状大分子/聚（N－异丙基丙烯酰胺）纳米粒子。与水介质中ATRP相比，在水/乙醇介质中所得聚合物纳米粒子更加规则，而且粒子间聚集程度较低。

关键词: 水介质, 原子转移自由基聚合, 树枝状大分子, 聚合物纳米粒子, 聚(N-异丙基丙烯酰胺)

Abstract: Polypropylenimine dendrimer (DAB-32, generation 4.0) was converted into the macroinitiator DAB-32-Br via reaction with bromoacetyl bromide. Dendrimer/poly(N-isopropyl acrylamide) nanoparticles with diameters between 60-150 nm were prepared by atom transfer radical polymerization of N-isopropyl acrylamide in H2O and H2O/CH3CH2OH media, using the DAB-32-Br/CuBr/Bpy as initiating system. Compared with in the H2O medium, the nanoparticles prepared by ATRP in H2O/CH3CH2OH medium were more regular and the aggregations between nanoparticles were less.

Key words: water-borne system, atom transfer radical polymerization, dendrimer, polymer nanoparticles, poly(N-isopropyl acrylamide)

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