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Preparation and characterization of photoresponsive poly(methyl methacrylate) microspheres bearing phosphorylcholine-analogous and spirooxazine moieties

✍ Scribed by Kazuo Sugiyama; Hisashi Nakano; Koji Ohga

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
930 KB
Volume
195
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

The photoresponsive copolymer microspheres [poly(MAIP‐co‐MMA)] were prepared from the emulsifier‐free emulsion copolymerization of 2‐[2‐(methacryloyloxy) ethyldimethylammonio]‐ethyl indolinonaphthooxazine phosphate (MAIP) and methyl methacrylate (MMA). From the kinetics of the copolymerization of MAIP and MMA, it was found that the initial rate of polymerization of MMA increased by the addition of a small amount of MAIP. From the X‐ray photoelectron spectroscopy (XPS) measurements MAIP moiety was found to be located on the surface of a particle. The introduction of a MAIP moiety into poly(MMA) microspheres results in a decrease in the amount of bovine serum albumin (BSA) adsorbed. A photoresponsive adsorption of BSA on poly(MAIP‐co‐MMA) microspheres was observed with spirooxazine‐merocyanine photoisomerization caused by UV irradiation.

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