›› 2008, Vol. 8 ›› Issue (6): 1245-1248.
• 材料工程专栏 • Previous Articles
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刘虎 朱严瑾 易昌凤 徐祖顺
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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)
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)
CLC Number:
TB381
TB383
O631.5
. Preparation of Dendrimer/Poly(N-isopropyl acrylamide) Nanoparticles[J]. , 2008, 8(6): 1245-1248.
刘虎 朱严瑾 易昌凤 徐祖顺. 树枝状大分子/聚(N-异丙基丙烯酰胺)纳米粒子的制备[J]. , 2008, 8(6): 1245-1248.
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