高强度PAMPS-PAAm互穿网络凝胶及其溶胀性能

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%.

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

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.