Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (12): 3230-3236.doi: 10.3866/PKU.WHXB20101217

• COLLOID AND INTERFACE CHEMISTRY • Previous Articles     Next Articles

Self-Assembled Colloid Particles and Properties of the Photosensitive Copolymer P(St/VM-co-MA)

ZHAO Yan-Qiong, FEI Fan, YI Cheng-Lin, JIANG Jin-Qiang, LUO Jing, LIU Xiao-Ya   

  1. School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu Province, P. R. China
  • Received:2010-08-13 Revised:2010-10-14 Published:2010-12-01
  • Contact: LIU Xiao-Ya E-mail:lxy@jiangnan.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20974041, 50673038).

Abstract:

A photosensitive amphiphilic copolymer P(St/VM-co-MA) was synthesized from styrene (St), a styrene-containing photosensitive monomer 7-(4-vinylbenzyloxy)-4-methyl coumarin (VM), and maleic anhydride (MA) by free radical copolymerization. P(St/VM-co-MA) self-assembled into colloid particles in the selective solvent N,N-dimethylformamide (DMF)/H2O. The morphologies, sizes, and size distributions of the colloid particles were characterized by transmission electron microscopy (TEM) and dynamic laser scattering (DLS). The P(St/VM-co-MA) colloid particles were photo-crosslinked by the photodimerization of the coumarin groups under UV irradiation to form crosslinked colloid particles. The crosslinking process was monitored using UV-Vis spectroscopy. The sizes and stabilities of the crosslinked and non-crosslinked colloid particles were examined by DLS. Additionally, the emulsification and encapsulation of the colloid particles were studied by laser scanning confocal microscopy (LSCM) and optical microscopy. The results showed that both the crosslinked and non-crosslinked colloid particles possessed emulsifying properties. During emulsification the oil-soluble dye was encapsulated into the emulsion. When the colloid particles were crosslinked, they became smaller and their structural stability as well as emulsification and encapsulation were improved.

Key words: Photosensitivity, Amphiphilic copolymer, Self-assembly, Emulsification, Encapsulation

MSC2000: 

  • O648