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Citation: CHEN Li, DONG Jing, MENG Qing-Jie. Swelling and Surfanctant Binding Behavior of Thermosensitive Cationic Hydrogels[J]. Chinese Journal of Applied Chemistry, ;2003, 20(4): 328-331. shu

Swelling and Surfanctant Binding Behavior of Thermosensitive Cationic Hydrogels

1.
School of Meterial Science and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300160

Corresponding author: CHEN Li,
Received Date: 9 October 2002
Available Online: 25 December 2002
Fund Project: 国家自然科学基金资助项目(20174027) (20174027)

Thermosensitive cationic hydrogels poly (NIPAM-co-DMAPAA-Q) were synthesized by radical copolymerization of N-isopropylacrylamide (NIPAM) with acryloylamino propyl trimethyl ammonium chloride (DMAPAA-Q),and the influences of amount of cationic monomer DMAPAA-Q on the swelling ratio,deswelling/reswelling kinetics have been studied.It is found that the swelling ratio and low critical solution temperature (LCST) of the copolymer hydrogels increased with increase in the content of cationic monomer when the mass fraction of DMAPAA-Q was ≤7.5%.The LCST disappeared when x>(DMAPAA-Q)=37.5%.The greatest reswelling rate occurred in period of first 2 h and the equillibrium state achieved in 5 h.The interaction of the copolymer with surfactants appeared to be a two-step adsorption process,rather than a formation of 1:1 complex between polyelectrolyte and surfactants.
- N-isopropylacrylamide,
- cationic monomer,
- thermosensitive hydrogel,
- surfactant
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