聚乙烯醇降解酶在纯PVA上浆棉织物退浆中的应用

针对目前纺织用聚乙烯醇浆料存在生物降解性差的问题，采用聚乙烯醇降解酶对PVA上浆的棉织物进行退浆，它可以高效分解织物上的PVA浆料，显著降低退浆废水的处理成本。从酶活方面对PVA降解酶粗酶液的酶学性质进行研究，并将该酶用于纯PVA上浆的棉织物退浆过程中。实验结果表明，PVA降解酶的适宜反应条件为pH值7-8，温度30℃，反应时间3 h，且可对PVA进行降解。当采用PVA降解酶退浆时，浆液中PVA含量与棉布上残留PVA量之和小于100%，而采用缓冲溶液和热水退浆，PVA总量变化不大。

Application of polyvinyl alcohol-degrading enzyme on cotton fabric sized by polyvinyl alcohol

PVA-degrading enzyme was used in the desizing of cotton fabric to solve the difficult degradation problem of polyvinyl alcohol,which can effectively decompose the PVA on fabrics and greatly reduce the cost of wastewater treatment.The paper mainly studied the nature of PVA-degrading enzyme according to enzyme activity,and applied it to desizing of the cotton sized with polyvinyl alcohol.The results demonstrated the suitable conditions are pH=7-8.T=30℃and t=3 h.PVA can be degraded by PVA-degrading enzyme.When PVA-degrading enzyme was applied to desizing,the total amount of PVA in the slurry plus residual PVA on cotton should be less than 100%,while it makes little difference in the total amount of PVA when buffer and hot water desizing is adopted.