| This dissertation used inverse suspension polymerization to prepare three kinds of super absorbent polymers with acrylic acid(AA),acrylamide(AM),N-methylol acrylamide(HAM)and 2-acrylamido-2-methylpropane sulfonic acid(AMPS)as the main raw materials,combined with the latest research progress at domestic and foreign.Then,a salt-tolerant super absorbent polymer with the best performance was obtained by comparing the performances of three kinds of SAP prepared above,and the synthetic process of the best one was optimized.Secondly,the surface-crosslinking treatment of the best SAP after the process optimization was carried out to prepare a salt-resistant and pressure-resistant SAP.Finally,this type of polymer was used to develop a anti-blisters insole with high sweat-absorbing capacity.The specific work is as follows:(1)Three kinds of salt-tolerant SAPs including P(AA-co-AM),P(AA-co-HAM)and P(AA-co-AMPS)were prepared by inverse suspension polymerization,then their chemical structure and surface morphology were investigated by FT-IR,SEM,and TGA.Three SAPs were evaluated by physical methods including water absorption(saline)ratio,water(saline)retention ratio and water(saline)retention ratio of certain pressures.The results showed above that the three kinds of salt-tolerant absorbent polymers had good liquid-absorbing ability and liquid-holding ability,among which P(AA-co-AMPS)had the best performance,and the water absorption(saline)rate could reach over 900g/g and 100g/g.(2)The polymerization process of P(AA-co-AMPS)synthesized above was optimized,four factors were used to analyze the degree of neutralization of AA,the concentration of NMBA,the concentration of APS,and the mass ratio of monomer AMPS to acrylic acid,then the influence of that four factors on the water absorption(saline)rate of P(AA-co-AMPS)was investigated systematically by L16(44)orthogonal experiment,the optimal process combination scheme was obtained by analysis of variance.The results showed that the mass ratio of monomer was 4:1,the degree of neutralization was 80%,the concentration of NMBA was 0.06 wt%and the concentration of APS was 0.35 wt%,they were the best process combination.After repeated verification experiments,the water absorption capacity reached 1344.3 g/g,and the saline absorption rate reached 145.1 g/g.(3)Preparation of surface cross-linking P(AA-co-AMPS)by preparing mixed liquor with glycerol and deionized water to obtain a structure of core-shell,and researching that the glycerol concentration and reaction temperature to the influence of the water(saline)absorption rate and pressurized saline absorption rate,then its chemical structure and surface morphology were investigated by FT-IR,SEM,and TGA.The results showed that the absorption of P(AA-co-AMPS)would reach the best peformance when the concentration of glycerol was 16.2wt%and the reaction temperature was 112?.(4)Designed and manufactured an anti-blister insole for high-strength weight-bearing marching.The insole body is provided with a three-layer structure from the top to the bottom,the upper and lower layer is a breathable and absorbable rough cotton layer,the middle layer is an EVA foam layer with a certain number of filled holes,and this layer filled with the above surface-crosslinked P(AA-co-AMPS)and wood powder were used to absorb sweat and hold sweat,and the lower layer is still a coarse cotton layer,and the interlayer used self-made ketimine curing epoxy adhesive to paste.The results of the study showed that the insole had a sweat absorption capacity of 29.8g at 30 kPa. |
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