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Study on Fibrillation of Rice Straw Fibers and Cross-linking with Ions to Prepare Hydrophobic Cellulose Films
Received:February 23, 2024  
DOI：10.11980/j.issn.0254-508X.2024.05.001
Key Words:cellulose microfibers  Fe3+ cross-linking  hydrophobic modification  contact angle  tensile stress
Fund Project:国家重点研究计划国际合作项目（2021YFE0104500）；国家自然科学基金（22078114）。
Author NameAffiliationPostcode
YI Zede State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
SHEN Juanli State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
FU Shiyu* State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640
South China University of Technology-Zhuhai Institute of Modern Industrial Innovation， Zhuhai， Guangdong Province， 519175 		519175
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Abstract:Cellulose microfiber （CMF） film with hydrophobicity was prepared from agricultural waste rice straw by caustic soda pulping， TEMPO oxidation and mechanical treatment， followed by vacuum filtration and cross-linking with Fe3+. The structure and properties were analyzed by FESEM， ATR-FTI-IR， Zeta potential test， XRD， tensile test， contact angle and water absorption， etc. The results showed that the CMF was sufficiently cross-linked with Fe3+ to efficiently improve the hydrophobicity of CMF film. The water contact angle of CMF film was affected by the time of cross-linking and the concentration of Fe3+， which reached up to 134.15°. The water absorption of the film immersed in water after 24 h was 50%， which was significantly lower than that of the uncross-linked CMF film （210%）. The ionically cross-linked CMF film also had good wet tensile stress of 37.5 MPa.
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