Mwltp Lead To Polymerization Of The Poly (nipa / Amps) Cross-linked Hydrogels And Their Application On The T / C Fabric

In this paper, a kind of novel polymeric hydrogel with good elasticity called poly[N -isopropylacrylamide/2-acrylamido-2-methylpropanesulfonic-acid](poly(NIPA/AMPS)) was synthesized from N - isopropylacrylamide (NIPA) and 2 - acrylamid - 2 -methylpropanesulfonic-acid (AMPS) through microwave low-temperature plasma initiation polymerization technique, in which N,N' - methylene bis(acryl - amide) (Bis) as the crosslinking agent. Different from individual poly N-isopropylacrylamide (PNIPA) hydrogel, the polymeric hydrogel is characteristic of not only temperature sensitivity but also preferable swelling properties and pH sensitivity. Effects of monomer concentrations, monomer mol ratios, crosslinking agent concentrations, plasma treatment powers, treatment durations and polymeric temperature on gel swelling properties, temperature and pH sensitivity were investigated. The optimal process of initiating polymerization on (poly(NIPA/AMPS)) hydrogel with microwave low-temperature plasma was determined.The structure of the synthesized polymers was confirmed by infrared spectroscopy (IR) and ultra spectroscopy. By examining the swelling ratio of hydyogels, it is obviously that the hydrogels of (poly(NIPA/AMPS)) obtained in appropriate conditions have acute sensitivity thermo-responsive and pH characters, moreover, good reversibility. The result shows that cross linker concentration has greater effect on swelling ratio (SR), and the lower critical solution temperature (LCST) of polymer were decided by the concentration of AMPS monomer.Based on the research on gel of polymerization, (N-isopropylacrylamide / sodium 2-acrylamide-2-methylpropanesulfonate (NIPA/SAMPS) was grafted onto T/C fabrics by Ar microwave low-temperature plasma induced grafting polymerization technique. Effects of monomer concentrations, AMPS monomer concentrations, crosslinking agent concentrations, plasma treatment powers, treatment durations, gas pressures, polymeric temperature on weighting percentage were discussed. Orthogonal method was used to optimize the process of grafting with good weighting percentage. Results indicate the surfaces of T/C fabrics grafted with (NIPA/SAMPS) showed both temperature and pH sensitivity. In comparison with untreated samples, the hydrostatic pressure of grafted samples improved vastly and the water vapour transmittion rate and the puncture resistance of that decreased slightly.