Journal
COLLOID AND POLYMER SCIENCE
Volume 290, Issue 13, Pages 1341-1346Publisher
SPRINGER
DOI: 10.1007/s00396-012-2697-8
Keywords
Thermosensitive; PNIPAM; Microcontainer; Core-shell particle; Preparation method
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Funding
- National Nature Science Foundation of China [20974023, 21034003]
- Shanghai Committee of Science and Technology, China [10XD1400500]
- Natural Science Foundation of the Higher Education Institutions of Jiangsu Province [10KJB430016]
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province [AE201018]
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Thermosensitive PNIPAM microcontainers were prepared by using silica particles as template. Silica particles were prepared by the Stober method and surface modified with linear P(NIPAM-co-MPS) chains. PNIPAM shell was then fabricated on the P(NIPAM-co-MPS)-modified silica particles through precipitation polymerization of NIPAM and MBA. Finally, PNIPAM microcontainers were obtained by removing the silica cores with NaOH. The materials were characterized by TEM, FTIR, GPC, and DLS. The PNIPAM microcontainers exhibit good thermosensitivity. The method to fabricate thermosensitive PNIPAM shell can be generalized to a versatile method for preparing PNIPAM shell on particles with silica surface, which includes surface modification with P(NIPAM-co-MPS) and precipitation polymerization of NIPAM and MBA using the modified particles as seed. Through this method, PNIPAM shell was successfully fabricated on iron oxide/silica nanostructures with a wormlike shape and relatively large size, which demonstrates the versatility of the method.
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