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Study on the Influence of Different Hydroxy-based Polymer Coatings on the Moisture Absorption/Desorption Properties and Humidity Control Capability of Coated Paper
Received:December 19, 2023  
DOI：10.11980/j.issn.0254-508X.2024.06.011
Key Words:sodium alginate  polyvinyl alcohol  CMC  moisture adsorption/desorption property  moisture control performance
Fund Project:国家自然科学基金项目（32001276，32171727）；中轻集团科技创新基金项目（ZQ2022JC-QN01）。
Author NameAffiliationPostcode
LI Yao School of Light Industry Science and Engineering， Tianjin University of Science and Technology， Tianjin， 300457
China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 		100102
ZHANG Xue* School of Light Industry Science and Engineering， Tianjin University of Science and Technology， Tianjin， 300457
China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640
Zhuangli Printing Company， Shantou， Guangdong Province， 515041
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
ZHAO Tao 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
ZHANG Wenhui School of Light Industry Science and Engineering， Tianjin University of Science and Technology， Tianjin， 300457 300457
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Abstract:This study investigated the influence of three different hydroxy-based polymer coatings and coating weights on the moisture absorption/desorption properties and humidity control performance of coated paper. Additionally， an evaluation system was developed to real-time detect humidity changes in a sealed microenvironment， aiming to explore the feasibility of using coated paper for humidity control in such environments under various external humidity conditions. The results showed that the sodium carboxymethyl cellulose （CMC） coated paper exhibited the most favorable moisture absorption/desorption properties and humidity control performance compared to sodium alginate （SA） and polyvinyl alcohol （PVA） coatings. Specifically， when the coating weight was 8.5 g/m2， the CMC coated paper （compared to uncoated base paper） showed a significant increase of 70.2% in moisture absorption capacity and 234.2% in moisture desorption capacity. Under the effect of high humidity or dry environment， after four opening and closing， compared with the uncoated base paper， CMC coated paper （with a coating weight of 34.1 g/m2） could reduced and inoreased the humidity fluctuation vaue of closed microenvironment by 11.5 and 8.6 percentage points， respectively.
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