Abstract
Abstract ：A photosensitive amphiphilic copolymer P(St/VM- co -MA) was synthesized from styrene (St), astyrene-containing photosensitive monomer 7-(4-vinylbenzyloxy)-4-methyl coumarin (VM), and maleicanhydride (MA) by free radical copolymerization. P(St/VM- co -MA) self-assembled into colloid particles inthe selective solvent N , N -dimethylformamide (DMF)/H 2 O. The morphologies, sizes, and size distributionsof the colloid particles were characterized by transmission electron microscopy (TEM) and dynamic laserscattering (DLS). The P(St/VM- co -MA) colloid particles were photo-crosslinked by the photodimerization ofthe coumarin groups under UV irradiation to form crosslinked colloid particles. The crosslinking processwas monitored using UV-Vis spectroscopy. The sizes and stabilities of the crosslinked and non-crosslinkedcolloid particles were examined by DLS. Additionally, the emulsification and encapsulation of the colloidparticles were studied by laser scanning confocal microscopy (LSCM) and optical microscopy. The resultsshowed 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 particleswere crosslinked, they became smaller and their structural stability as well as emulsification andencapsulation were improved.
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