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Preparation and Properties Research of High-strength Cellulose Membranes by Hot-pressing
Received:March 05, 2025  Revised:March 27, 2025
DOI：10.11981/j.issn.1000-6842.2025.03.172
Key Words:cellulose film;hot-pressing;strength properties;hydrogen bonds
Fund Project:国家重点研发计划课题（2023YFD2201904）；福建农林大学发展基金（KFB23145XA）；福建省大学生创新创业计划训练项目（FAFUXMPC20250422002-00083）。
Author NameAffiliationPostcode
ZHANG Xinyuan* College of Materials Engineering， National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 350108
ZHANG Haoyun College of Materials Engineering， National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 350108
YIN Yuxin College of Materials Engineering， National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 350108
ZHU Zhishuang College of Materials Engineering， National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 350108
HUANG Liulian College of Materials Engineering， National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 350108
CHEN Lihui College of Materials Engineering， National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 350108
LI Jianguo* College of Materials Engineering， National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 350108
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Abstract:
      Cellulose films were prepared through the regeneration combined with hot-pressing method using dissolving pulp as the raw material and 1-allyl-3-methylimidazolium chloride/dimethyl sulfoxide （AMIMCI/DMSO） as solvents， and the effects of the hot-pressing process on the strength properties of the cellulose films were primarily investigated. The results indicated that hot-pressing enhanced the inter-molecular bonding of cellulose in the films， generated stronger hydrogen bonds and established a denser hydrogen bond network， thereby significantly improved the strength properties of the cellulose films. Hot-pressing for 0.5 h under the conditions of temperature of 80 ℃ and pressure of 1 MPa， the prepared cellulose film achieved a tensile strength of up to 210 MPa with toughness of 60.8 MJ/m³. Moreover， hot-pressing treatment further improved the optical transmittance and surface smoothness of cellulose films， achieving a transmittance of 92% and a surface roughness as low as 3 nm.
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