韧化处理辅助酶解法制备表面施胶淀粉及其对纸张机械性能的影响

Annealing treatment assisted enzymatic hydrolysis for preparation of surface sizing starch and its impact on mechanical properties of paper

关键词:  玉米淀粉  韧化处理  淀粉酶水解；表面施胶  长程有序性  短程有序性  纸张机械性能

Key Words:corn starch  annealing treatment  amylase hydrolysis  surface sizing  long-rang order  short-rang order  mechanical properties of paper

摘要:本文首先对玉米淀粉进行韧化处理，再通过淀粉酶解法制备表面施胶淀粉。探究了改性后淀粉的理化性质，及其对纸张机械性能的影响。研究表明，韧化处理可有效调控直链淀粉含量和淀粉结晶结构，以C75T60H24处理的淀粉制备的表面施胶淀粉可显著提高纸张机械性能，环压指数最大提升约3.7%，横向抗张指数最大提升约10.5%，纵向抗张指数最大提升约3.4%，耐破指数最大提升约10%。本研究创新性地从表胶淀粉短程有序性角度诠释了其对纸张机械性能的增强机制，为韧化处理制备表胶淀粉提供一定的理论依据与技术支撑。

Abstract:In this study, corn starch was first subjected to the annealing treatment, and then the surface-sized starch was prepared using amylase hydrolysis method. The study specifically discussed the physicochemical properties of modified starch and its impact on the mechanical properties of paper. The results showed that annealing treatment could significantly regulate the content of amylose and the crystalline structure of starch, and the surface-sized starch prepared from annealed C75T60H24 starch significantly improved the mechanical properties of paper, with a maximum increase of approximately 3.7% in ring crush index, 10.5% in transverse tensile index, 3.4% in longitudinal tensile index, and 10% in burst index. The innovative research results provide a deep understanding of the enhanced mechanism of surface-sized starch on the mechanical properties of paper in terms of short-range order, which provides theoretical basis and technical support for the preparation of surface-sized starch assisted by annealing treatment.