目的 为了更好地了解甘蔗渣半纤维素在加工过程中与原纤化纤维之间的化学反应性，并为甘蔗木聚糖生物聚合物在材料和产品中的应用创造可能性。方法 以甘蔗渣纤维为原料，通过机械法制备原纤化纤维，采用NaOH对纤维素进行处理。通过纳米粒度仪(FLA)、激光粒度仪(LPS)、接触角测试仪(CA)、水蒸气透过率测试仪(WVTR)、扫描电镜(SEM)、X-射线衍射(XRD)等手段对原纤化纤维悬浮液和纤维基薄膜进行表征。研究处理后纤维素悬浮液的组成、粒径与电荷量，以及纤维基薄膜的表观形貌、纤维结构和性能的变化。结果 经质量分数大于10%的NaOH处理后，半纤维质量分数降低约6%，纤维素的结晶区发生变化，纤维悬浮液的稳定性大幅度降低。当半纤维素质量分数大于20%时，原纤化纤维薄膜具有优异的水蒸气阻隔性能及疏水性能，接触角为94°±4°。结论 蔗渣中的半纤维素与原纤化纤维之间的相互作用及半纤维素侧基取代反应对纤维素材料的组成、结构和性能有重要影响。

The work aims to better understand the chemical reactivity between hemicellulose and fibrillated cellulose during processing, and to create an alternative possibility for using bagasse xylan biopolymers in materials and products. With bagasse fiber as raw material, fibril fibers were prepared by mechanical method and then treated by NaOH. The fibrillated fiber suspensions and cellulose films were characterized by fiber length analyzer (FLA), laser particle scattering (LPS), contact angle analyzer (CA), water vapor transmittance analyzer (WVTR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The composition, particle size and electrical charge of treated cellulose suspensions, as well as the morphology, structure and properties of cellulose film were investigated. After the treatment by NaOH with a concentration more than 10%, the content of hemicellulose decreased by about 6%, the crystalline area of cellulose changed, and the stability of fiber suspension greatly decreased. When the hemicellulose content was more than 20%, the cellulose film showed excellent water vapor barrier and hydrophobic properties, with the contact angle of 94°±4°. Both the interaction between hemicellulose and fibrillated fibers of bagasse and the substitution reaction of hemicellulose side groups have significant influence on the composition, structure and properties of cellulose materials.