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| Study on the Preparation and Properties of Lignocellulose-based Composite Films |
| Received:September 18, 2025 Revised:October 14, 2025 |
| DOI：10.11981/j.issn.1000-6842.2026.02.42 |
| Key Words:lignocellulose-based composite films;physically cross-linked;chemically cross-linked;mechanical properties;water resistance;UV shielding performance |
| Fund Project:江苏省市场监管局科技计划项目（KJ2026097）。 |
| Author Name | Affiliation | Postcode | | WU Bin* | 1Huai’an Product Quality Supervision and Inspection Center， Huai’an， Jiangsu Province， 223001
2College of Light Industry and Food Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 | 210037 | | LI Bin | 1Huai’an Product Quality Supervision and Inspection Center， Huai’an， Jiangsu Province， 223001 | 223001 | | LIANG Tingting | 1Huai’an Product Quality Supervision and Inspection Center， Huai’an， Jiangsu Province， 223001 | 223001 | | LI Yun | 2College of Light Industry and Food Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 | 210037 | | ZHANG Lili | 2College of Light Industry and Food Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 | 210037 | | WANG Zhiguo* | 2College of Light Industry and Food Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 | 210037 |
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| Abstract: |
| This study mimicked the structure of natural plant cell walls， using cellulose nanofibers （CNF）， konjac glucomannan （KGM）， and sulfonated lignin （LA） as raw materials， a physically cross-linked network was constructed via acetic acid vapor protonation， and by the formation of a chemically cross-linked network using epichlorohydrin and ammonia vapor， resulting in the preparation of two types of cross-linked lignocellulose-based composite films. The study systematically investigated the effects of cross-linking methods and component ratios on the physicochemical properties of the composite films， revealing the synergistic mechanisms of the three components within the composite films. The results indicated that， similar to natural plant cell walls， CNF within the composite film formed a rigid three-dimensional framework through intermolecular hydrogen bonding， KGM enhanced the synergistic effect of hydrogen bonding to improve film toughness， and LA could toughen the film and optimize its pore structure. Compared to the control without LA， when the LA mass fraction was 1%， the fracture strain of the chemically cross-linked composite film increased from 5.01% to 10.65%， and the 1 day water swelling rate was as low as (175.78±11.06)%， which was only 4.12% of that of the physically cross-linked composite film. At a LA mass fraction of 15%， the chemical cross-linked composite film achieved peak blocking rates for medium-wave ultraviolet （UVB） and long-wave ultraviolet （UVA） radiation， at 98.5% and 87.8%， respectively. These results demonstrated that LA not only optimized the pore structure of the composite film and significantly enhanced its mechanical properties but also conferred excellent water resistance and UV shielding performance. |
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