HRP催化降解淀粉与HPA-CAE接枝共聚物的制备及性能

Preparation and Properties of Graft Copolymer of Degraded Starch and HPA-CAE with HRP Catalysis

摘要:

用丙烯酸羟丙酯与柠檬酸发生酯化反应合成丙烯酸羟丙酯柠檬酸酯(HPA-CAE)，在辣根过氧化酶(HRP)/H2O2/乙酰丙酮(ACAC)体系引发下HPA-CAE与降解淀粉发生接枝共聚反应。研究了HRP、H2O2、ACAC和HPA-CAE用量对共聚物接枝效率(GE)和接枝率(GP)的影响，结果表明，50 g酶降解淀粉（wt 15%）与13.9 g HPA-CAE在HRP(6.4 mg)／H2O2(4.7 mL)／ACAC(1.2 g)催化下发生共聚反应为最适反应条件。用FTIR和NMR表征了接枝共聚物的结构。应用结果表明，该共聚物复鞣后的革手感柔软、粒面平细和厚度均匀。

Abstract:

Hydroxypropyl acrylate-citrate (HPA-CAE) was prepared by esterification of citric acid and hydroxypropyl acrylate. Then a graft copolymer was synthesized by copolymerization of degraded starch and HPA-CAE using horseradish peroxidase (HRP) /H2O2/acetylacetone (ACAC) as catalyst. The effects of amount of HRP, H2O2, ACAC and CA-HPA on grafting efficiency (GE) and grafting percentage (GP) were investigated. The optimum graft copolymer was synthesized by graft copolymerization of 50 g degraded starch (wt 15%) with 13.9 g CA-HPA in the presence of 6.4 mg HRP/4.7 mL H2O2/1.2g ACAC. The structure of the copolymer was characterized by FTIR and NMR. The applied results showed that the retanned leather had the merits of softness, fine grain and uniform thickness.