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Study on the Influence Mechanism of Starch Enzymatic Hydrolysis Efficiency on the Enhancement Effect of Corrugated Base Paper
Received:October 23, 2025  Revised:November 21, 2025
DOI：10.11981/j.issn.1000-6842.2025.04.153
Key Words:waste corrugated cardboard;recycled fiber;sizing;corn starch enzymatic hydrolysis;paper strengthening;enzymatic hydrolysis efficiency
Fund Project:国家十四五重点研发计划（2022YFC2105504）。
Author NameAffiliationPostcode
SU Meirong* Key Lab of Eco-Textiles， Ministry of Education， Jiangnan University， Wuxi， Jiangsu Province， 214122 214122
LI Minwei Key Lab of Eco-Textiles， Ministry of Education， Jiangnan University， Wuxi， Jiangsu Province， 214122 214122
HU Huijie Key Lab of Eco-Textiles， Ministry of Education， Jiangnan University， Wuxi， Jiangsu Province， 214122 214122
YANG Lu The National Enterprise Technology Center of Tiger Paper Group Co.， Ltd.， Yueyang， Hu’nan Province， 414001 414001
LIU Xinyu Key Lab of Eco-Textiles， Ministry of Education， Jiangnan University， Wuxi， Jiangsu Province， 214122 214122
WANG Meiling Wuxi School of Medicine， Jiangnan University， Wuxi， Jiangsu Province， 214122 214122
XU Yiqiang Wuxi School of Medicine， Jiangnan University， Wuxi， Jiangsu Province， 214122 214122
HU Jing Wuxi School of Medicine， Jiangnan University， Wuxi， Jiangsu Province， 214122 214122
QIU Hua Key Lab of Eco-Textiles， Ministry of Education， Jiangnan University， Wuxi， Jiangsu Province， 214122 214122
DENG Haibo* Key Lab of Eco-Textiles， Ministry of Education， Jiangnan University， Wuxi， Jiangsu Province， 214122 214122
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Abstract:
      The purpose of this study was to find out the correlation mechanism between the strength properties of paper made of cellulose-based OCC secondary fibers and the viscosity， average molecular weight， and amylopectin content of starch glue obtained by amylase enzymatic hydrolysis. It was determined the most suitable range of starch glue parameters to improve the strength properties of paper， so as to provide guidance for paper mills to achieve rapid enzymatic hydrolysis and meet sizing agent requirements. The results showed that the corn starch glue solution obtained by enzymatic hydrolysis at a holding temperature of 78 ℃ and α-amylase dosage of 0.10~2.00 U/g (50~1 000 mL/t) could increase the strength properties (tensile strength and ring-crush-resistance) of the single-sized paper by over 15% compared to the base paper， and the average molecular weight， amylopectin content， and viscosity of starch glue were 2×104~4.3×105 g/mol， 56%~77%， and 3.35~138.26 mPa·s， respectively. In order to be suitable for continuous sizing in paper mills， the range of viscous average molecular weight， amylopectin content， and viscosity of starch glue solution should be further reduced， which were 1.3×105~2.7×105 g/mol， 63%~76%， and 10~30 mPa·s， respectively. At the same time， the correlation between enzymatic hydrolysis time and starch glue parameters and paper strength enhancement showed that under conditions of α-amylase dosage 0.24 U/g (120 mL/t) and hydrolysis time of 10 min， the starch glue solution exhibited optimal paper strength enhancement effects， with tensile strength and ring-crush-resistance of paper increasing by 21.2% and 26.4% respectively compared to the corrugated base paper. The viscosity， amylopectin content， and viscous average molecular weight of starch glue were all in line with the inference interval.
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