采用傅里叶红外光谱(FTIR)、X射线衍射(XRD)和扫描电镜(SEM)研究了压榨过程中纤维超微结构和纤维形态的变化规律。结果表明:随着压榨压力的增大,纤维素分子间氢键的含量呈现先增大后减小的趋势,而分子内氢键则正好相反;与原纤维相比,压榨压力为0.3 MPa时的纤维素分子间氢键O(6)H O(3′)含量增大了15.65%,分子内氢键O(2)H O(6)和O(3)H O(5)的相对含量总和降低了23.34%。X射线衍射结果显示:随着压榨压力的增大,结晶度和纤维结晶区的晶面尺寸均在压榨压力为0.3 MPa时达到最小值;随着压力的增大,纤维的表面形态逐渐变得光滑、硬挺,呈现扁平状。 FTIR, XRD and SEM were used to study the changes of fiber ultrastructure and fiber morphology during the pressing process. The results showed that with the increase of pressing pressure, the content of hydrogen bonds between cellulose molecules first increased and then decreased, while the intramolecular hydrogen bonds were the opposite. Compared with fibrils, , The content of HO (3 ’) increased by 15.65% and the relative content of intramolecular hydrogen bonds O (2) HO (6) and O (3) HO (5) decreased 23.34%. X-ray diffraction results show that with the increase of the pressing pressure, the crystallinity and the crystal size of the crystalline zone of the fiber both reach the minimum when the pressing pressure is 0.3 MPa. As the pressure increases, the surface morphology of the fiber gradually becomes Smooth, stiff, flattened.