稻草秸秆纤维微米化及其离子交联制备疏水纤维素膜的研究

易泽德; 沈娟莉; 付时雨

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稻草秸秆纤维微米化及其离子交联制备疏水纤维素膜的研究

Study on Fibrillation of Rice Straw Fibers and Cross-linking with Ions to Prepare Hydrophobic Cellulose Films

收稿日期：2024-02-23

DOI：10.11980/j.issn.0254-508X.2024.05.001

关键词: 纤维素微细纤维 Fe³⁺离子交联疏水改性接触角拉伸应力

Key Words:cellulose microfibers Fe³⁺ cross-linking hydrophobic modification contact angle tensile stress

基金项目:国家重点研究计划国际合作项目（2021YFE0104500）；国家自然科学基金（22078114）。

作者	单位	邮编
易泽德	华南理工大学制浆造纸工程国家重点实验室，广东广州，510640	510640
沈娟莉	华南理工大学制浆造纸工程国家重点实验室，广东广州，510640	510640
付时雨^*	华南理工大学制浆造纸工程国家重点实验室，广东广州，510640 华南理工大学珠海现代产业创新研究院，广东珠海，519175	519175

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摘要:农业废弃物稻草秸秆经NaOH预处理、TEMPO氧化和机械处理，再经真空抽滤成膜并与Fe³⁺交联，制备了具有疏水性的纤维素微细纤维（CMF）膜。通过FESEM、ATR-FT-IR、Zeta电位测试、XRD、拉伸测试、接触角和吸水率等表征，分析了CMF膜的结构和性能。结果表明，CMF充分与Fe³⁺交联，有效提高了CMF膜的疏水性。CMF膜的疏水性受离子交联时间和Fe³⁺浓度的影响，其水接触角最高可达134.15°；该膜在水中浸泡24 h后吸水率为50%，明显低于未交联CMF膜（210%）。Fe³⁺交联的CMF膜还具有良好的湿拉伸力，达37.5 MPa。

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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