Synthesis and characterization of thermo-sensitive poly (N-isopropylacrylamide) hydrogel with fast response rate

QIN Aixiang1, LIU Qunfeng1, ZHANG Ping1, LU Mangeng2

PDF(343 KB)
PDF(343 KB)
Front. Chem. China ›› 2007, Vol. 2 ›› Issue (2) : 135-139. DOI: 10.1007/s11458-007-0028-2

Synthesis and characterization of thermo-sensitive poly (N-isopropylacrylamide) hydrogel with fast response rate

  • QIN Aixiang1, LIU Qunfeng1, ZHANG Ping1, LU Mangeng2
Author information +
History +

Abstract

Thermo-sensitive poly (N-isopropylacrylamide) (PNIPA) hydrogel with fast response rate was prepared by polymerizing N-isopropylacrylamide (NIPA) in an aqueous hydroxyl-propyl-methyl cellulose solution. The volume phase transition temperature of PNIPA hydrogels was characterized by differential scanning calorimetry (DSC), and the surface morphology was observed by scanning electron microscopy (SEM). The swelling ratios of the hydrogels at different temperatures were measured. Furthermore, the deswelling kine tics of the hydrogels was also studied by measuring their water retention capacity. In comparison with a conventional PNIPA hydrogel prepared in water, the hydrogel synthesized in aqueous hydroxyl-propyl-methyl cellulose solution has higher swelling ratios at temperatures below the lower critical solution temperature and exhibits a much faster response rate to temperature changes. For example, the hydrogel made in aqueous hydroxyl-propyl-methyl cellulose solution lost 89% water within 1 min and about 93% water in 4 min, whereas the conventional hydrogel lost only about 66% water in 15 min from the deswelling measurement in similar conditions.

Cite this article

Download citation ▾
QIN Aixiang, LIU Qunfeng, ZHANG Ping, LU Mangeng. Synthesis and characterization of thermo-sensitive poly (N-isopropylacrylamide) hydrogel with fast response rate. Front. Chem. China, 2007, 2(2): 135‒139 https://doi.org/10.1007/s11458-007-0028-2
PDF(343 KB)

Accesses

Citations

Detail

Sections
Recommended

/