高强度PAMPS-PAAm互穿网络凝胶及其溶胀性能

Swelling Degrees Property of High Strength PAMPS-PAAm Interpenetrating Polymer Network Hydrogel

通过考察不同单体浓度或离子强度下凝胶的力学性能和溶胀特性,对聚2-丙烯酰胺-2-甲基丙磺酸（PAMPS）与聚丙烯酰胺（PAAm）形成的互穿网络凝胶的高强度性能和作用机理进行了研究。结果表明：PAMPS-PAAm互穿网络凝胶的力学强度对c（AMPS）存在一个最佳值（1 mol/L）,且随c（AAM）的增大而显著增大（0.5-4 mol/L）。当c（AMPS）=1 mol/L、c（AAM）=4 mol/L时,互穿网络凝胶的最大抗压强度达6.46 MPa;改变凝胶体系内水的离子强度,PAMPS-PAAm凝胶在0.25 mol/kg离子强度时的抗压强度与纯水状态下相比增加了29%。

The properties and mechanism of high-strength interpenetrating polymer network hydrogel, which was synthesized by 2-acrylamide-2-methylpropane-sulfonic acid and acrylamide, were studied according to their mechanical and swelling experiments under different monomer concentrations and ionic strength. Results show that the strength of PAMPS-PAAm interpenetrating polymer network hydrogel increases with the increasing of AAm concentration （0.5--4 mol/L）,while the AMPS concentration has a optimal value （1 mol/L） and the highest compressive strength of the interpenetrating polymer network hydrogel is up to 6. 46 MPa with 1 mol/L AMPS and 4 mol/L AAm. The compressive strength of PAMPS-PAAm hydrogel increases by 29 % when increasing the ionic strength of the water in hydrogels to 0.25 mol/kg compared to deionized water.