期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 18, 期 2, 页码 744-751出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2011.11.117
关键词
Hybrid materials; Silica; PNIPAm; Vinyl trimethoxysilane; Phase transition temperature
资金
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology (MEST) of Korea for the Center for Next Generation Dye-sensitized Solar Cells [2010-0001842]
Two types of thermosensitive poly(N-isopropylacrylamide) (PNIPAm)-silica organic/inorganic hybrid particles were successfully prepared in aqueous solution through a facile synthetic process. Silane coupler of vinyl organic groups connects the PNIPAm to silica. First, hybrid spheres were prepared by grafting PNIPAm polymers to VTMS (vinyl trimethoxysilane) silica spheres. The thickness of polymer shell on the silica surfaces could be easily controlled by varying the concentrations of NIPAm monomer. Second, another type of hybrid particle was fabricated by encapsulating PNIPAm polymer with silica materials. The PNIPAm polymers were completely encapsulated by silica shell. The morphologies and shell thickness were characterized through SEM and TEM. The variations of phase transition temperature of PNIPAm were measured using DSC. (C) 2011 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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