期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 138, 期 6, 页码 -出版社
WILEY
DOI: 10.1002/app.49788
关键词
applications; copolymers; cross-linking; differential scanning calorimetry; thermal properties
资金
- Dthe Ministry of Trade, Industry Energy [20172020108570]
- Korea Institute of Energy Technology Evaluation and Planning
A series of thermoresponsive hydrogels were prepared and investigated in this study, with varying contents of co-monomer NIPMAm and co-solvent glycerol. The resulting polymer gels exhibited LCSTs and freezing points within specific temperature ranges, making them suitable materials for smart windows that respond to environmental conditions.
In this study, a series of thermoresponsive cross-linked copolymer poly [N-isopropylacrylamide(NIPAm)-co-N-isopropylmethacrylamide(NIPMAm)] (P-M series samples: P-M-0, 10, 20, 30, 40, where numbers are co-monomer contents) hydrogels were prepared by free radical polymerization using the main monomer N-isopropylacrylamide (NIPAm), co-monomer N-isopropylmethacrylamide (NIPMAm), cross-linking agent N, N-methylenebisacrylamide, initiator (ammonium persulfate)/catalyst, and solvent water. In addition, a series of samples [P-G series samples: P-G-0, 10, 20, 30, 40, where numbers are co-solvent glycerol content) were prepared using P-M-40 as components and water/co-solvent glycerol as a mixed solvent. The effects of co-monomer NIPMAm and co-solvent glycerol contents on the lower critical solution temperature (LCST)/freezing temperature and light transmittance as function of temperature of the prepared copolymer gels were investigated. The resulting thermoresponsive polymer gels had LCSTs in the range of 17.9 to 38.7 degrees C and freezing points in the range of 6.3 to -38.5 degrees C. These gels are suitable materials for smart windows that are responsive to various environmental conditions.
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