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Enhancing Barrier and Mechanical Properties of Paper-based Materials Through ZnCl2/Cellulose Solution Coating
Received:September 27, 2024  
DOI：10.11980/j.issn.0254-508X.2025.03.012
Key Words:ZnCl2/cellulose solution  regenerated cellulose coating  barrier properties  mechanical properties
Fund Project:国家自然科学基金（32171727，32001276）；中国轻工集团科技创新基金项目（ZQ2022JC-QN01，ZQ2023JC-GC01）；浙江省龙游县重大科技攻关课题（JHXM2023052）。
Author NameAffiliationPostcode
DU Xinyun School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640
China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
ZHANG Xue* China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
MO Lihuan School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
CHENG Yun China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
HOU Leilei China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
CHEN Linghua China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
CHEN Xuemei China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
ZHANG Hongjie* China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
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Abstract:This study utilized a natural cellulose homologous to paper fibers for coating enhancement of cellulose paper. The results showed that ZnCl2/cellulose solution could form a dense regenerated cellulose film on the surface of paper， significantly improving the interface bonding between internal and surface fibers of the paper， reducing the porosity of the paper， promoting the densification of the surface structure， and greatly enhancing the barrier and mechanical properties of the coated paper. Compared to uncoated paper， the air permeability， water vapor permeability， and oxygen permeability of the coated paper decreased by 99.8% （coating weight of 0.8 g/m2）， 80.7% （coating weight of 0.2 g/m2）， and 86.2% （coating weight of 1.0 g/m2）， respectively， with the water contact angle increased， Cobb value decreased， and the water droplet stayed on paper surface for a significantly longer time， indicating an improvement in the hydrophobic properties of the coated paper. Furthermore， compared to uncoated paper， the dry and wet tensile strength， bursting index， and internal bond strength of the coated paper increased by 76.9%， 1645.5%， 48.7%， and 81.1%， respectively.
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