Self-assembly of monodisperse polymer microspheres from PPQ-b-PEG rod-coil block copolymers inselective solvents  

作　　者：ZHANG Xueao CHEN Ke XIE Kai LONG Yongfu 

机构地区：[1]College of Aerospace and Material Engineering, National University of Defence Technology, Changsha 410073, China College of Aerospace and Material Engineering, National University of Defence Technology, Changsha 410073, China College of Aerospace and Material Engineering, National University of Defence Technology, Changsha 410073, China College of Aerospace and Material Engineering, National University of Defence Technology, Changsha 410073, China

出　　处：《Science China Chemistry》2005年第1期42-48,共7页中国科学（化学英文版）

基　　金：the National Key Basic Research“973”Program of China(Grant No.5130702002).

摘　　要：Poly(phenylquinoline)-block-poly(ethylene glycol)(PPQ-b-PEG) rod-coil block co- polymers possess the self-assembly behavior in selective solvents. The copolymers in the mixed solvents of V(trifluoroacetic acid, TFA)︰V(dichloromethane, DCM)=1︰1 can self-assemble into polymer hollow microspheres with diameters of a few micrometers. The polymer hollow micro- spheres are monodisperse, and the diameters of them increase with an increased polymerization degree of the PPQ rigid-rod block. The solution concentration has no effect on the microsphere diameter, but spherical surface shows burrs when the solution concentration is too low. It has been found that the obtained dilute solution has the strongest absorption peak at 376 nm and strongest emissionpeak at 604 nm by the spectroscopy analysis.Poly(phenylquinoline)-block-poly(ethylene glycol)(PPQ-b-PEG) rod-coil block co- polymers possess the self-assembly behavior in selective solvents. The copolymers in the mixed solvents of V(trifluoroacetic acid, TFA)︰V(dichloromethane, DCM)=1︰1 can self-assemble into polymer hollow microspheres with diameters of a few micrometers. The polymer hollow micro- spheres are monodisperse, and the diameters of them increase with an increased polymerization degree of the PPQ rigid-rod block. The solution concentration has no effect on the microsphere diameter, but spherical surface shows burrs when the solution concentration is too low. It has been found that the obtained dilute solution has the strongest absorption peak at 376 nm and strongest emissionpeak at 604 nm by the spectroscopy analysis.

关 键 词：poly(phenylquinoline)  poly(ethylene glycol)  ROD-COIL block copolymer  self-assembly  MONODISPERSE microspheres. 

分 类 号：N[自然科学总论]