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Preparation of microspheres with silicone oil cores and poly( N ‐isopropylacrylamide) shells by physical coating
Author(s) -
Xiao XinCai,
Zhuo RenXi,
Xu Jian,
Liu Bing,
Liu JiYing
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.24838
Subject(s) - poly(n isopropylacrylamide) , materials science , silicone oil , particle size , coating , chemical engineering , microsphere , polymer chemistry , silicone , particle (ecology) , pulmonary surfactant , lower critical solution temperature , morphology (biology) , composite material , copolymer , polymer , oceanography , engineering , geology , biology , genetics
Surfactant‐free thermoresponsive microspheres with a silicone oil cores surrounded by poly( N ‐isopropylacrylamide) shells have been successfully prepared by physical coating method for the first time. The influences of reaction temperature, N ‐isopropylacrylamide (NIPAM) dosage, and stirring rate on the formation, morphology, particle size, and monodispersity of microspheres were experimentally studied. In the preparation of microspheres, when reaction temperature was above the lower critical solution temperature of poly( N ‐isopropylacrylamide), products had higher yield of particles and narrower size distribution. With increasing NIPAM dosage, the particle diameter became larger and the shell layer thickened and the monodispersity became better. With increasing stirring rate, the particle diameter and the monodispersity decreased obviously. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102:5571–5576, 2006