原子转移自由基聚合接枝改性纳米SiO_2的研究进展

Advance on Grafting Modification of Nano-SiO_2 with Atom Transfer Radical Polymerization

纳米SiO2粒子极易团聚,在有机介质中难以均匀分散,从而大大地限制了其优异性能的发挥,有必要对其进行化学改性处理。原子转移自由基聚合(atom transfer radical polymerization,ATRP)是对纳米SiO2粒子进行接枝改性的一种有效途径,通过ATRP对纳米SiO2粒子进行表面改性,可以制备集无机纳米粒子和聚合物的优点于一身的SiO2-聚合物复合材料,且接枝链的长度及分子量分布可控,拓展了纳米SiO2的应用领域。本文主要综述了ATRP、RATRP(reverse ATRP)、AGET ATRP(activators generated by electron transferATRP)和ARGET ATRP(activators regenerated by electron transfer ATRP)方法对纳米SiO2接枝改性的研究现状。

The excellent properties of nano-SiOz particles are restricted largely due to their aggregation and poor dispersion in organic solvents, so chemical modification of SiOz are necessary to overcome these disadvantages. Atom transfer radical polymerization （ATRP） is an effective way for the modification of nano-SiOz particles, SiOz-polymer composite materials with the advantages of polymers and inorganic nanoparticles could be synthesized via ATRP on surface modification of the nano-Si02 particles, and the length and the molecular weight distribution of the grafting chains are both controllable, expand the application of nano-SiO~ particles. The current situation of ATRP, RATRP （reverse ATRP）, AGET ATRP（activators generated by electron transfer ATRP） and ARGET ATRP （activators regenerated by electron transfer ATRP）methods used in grafting modification of nano-SiO2 have been reviewed.