Abstract：This paper reports an easy and effective way to fabricate polystyrene/poly (N-isopropylacrylamide) (PS/PNIPAM) core-shell particles and PNIPAM hollow spheres. The main point of the method is to take advantage of the hydrophobic interaction between initiator and PS particles. The hydrophobic azodiisobutyronitriles automatically concentrate around the PS particles and initiate polymerization of N-isopropylacrylamide (NIPAM) and the crosslinker methylene bisacrylamide (MBA), which dissolve in the aqueous phase, at the surface of the PS nanoparticles. Then, PNIPAM adheres to the PS particles to form a core-shell structure as a result of their hydrophobic interaction. This interaction is due to the unique property of PNIPAM, namely, its ability to transition from hydrophilic to hydrophobic when the temperature rises to 32°C. Furthermore, the hollow PNIPAM spheres were obtained by etching the PS core with chloroform.
出版日期: 2008-09-05
引用本文:
. Construction of PS/PNIPAM core-shell particles
and hollow spheres by using hydrophobic interaction and thermosensitive
phase separation[J]. Frontiers of Chemical Engineering in China - Selected Publications from Chinese Universities, 2008, 2(3): 253-256.
ZHU Dongmei, WANG Fei, GAO Cuiling, XU Zheng. Construction of PS/PNIPAM core-shell particles
and hollow spheres by using hydrophobic interaction and thermosensitive
phase separation. Front. Chem. Sci. Eng., 2008, 2(3): 253-256.
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