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| Study on Enhancing Waterproof and Oil-proof Performance of Paper-based Composites with Stearic Acid-modified Lignin-containing Cellulose Micro/Nanofibrils |
| Received:November 15, 2024 |
| DOI：10.11980/j.issn.0254-508X.2025.04.008 |
| Key Words:lignin-containing cellulose micro/nanofibrils stearic acid barrier paper waterproof and oil-proof performance |
| Fund Project:“攀登计划”广东大学生科技创新培育专项资金资助项目（pdjh2023a0026）；广州省自然科学基金面上项目（2023A1515011941）；大学生创新创业训练计划项目（202410561107）。 |
| Author Name | Affiliation | Postcode | | WANG Wanhua* | Stake Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | GU Xunhong | Stake Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | DONG Xinrui | Stake Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | CHEN Jiajun | Stake Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | YU Zhongyu | Stake Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | ZHENG Guibin | Stake Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | LI Bo* | Stake Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 |
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| Abstract:This study utilized unbleached eucalyptus pulp to prepare lignin-containing cellulose micro/nanofibrils （LCMNF）， enhancing their waterproof by grafting long-chain alkanes using stearic acid. These modified fibrils were then sequentially deposited on the filter paper alongside unmodified LCMNF， forming the enhancing paper-based composites with a top layer of LCMNF and a middle layer of modified fibrils in a bilayer structure. Through thermal pressing process， the LCMNF of bilayer structure was tightly bonded， improving the waterproof and oil-proof performance of the paper-based composites. The results showed that Cobb60 value and air permeability of the prepared paper-based composites that depositing 8 g/m2 modified and 12 g/m2 of unmodified LCMNF were significantly reduced to 16.5 g/m² and ≤0.003 μm/（Pa·s）， respectively， which were 16.2% and 0.02% of those of the original paper. Meanwhile， the kit value increased from 0 to 12， demonstrating a significant enhancement in oil-proof performance. |
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