摘要
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。
The changes of supramolecular structure and fiber morphology during pressing were studied by the methods of Fourier transform infrared spectroscopy （FTIR）, X-ray diffraction （XRD） and scanning electron microscopy （SEM）. It appeared by FTIR that the content of inter-molecular hydrogen bonds of first increased and then decreased, whereas regular about the content of intra- molecular hydrogen bonds was opposite with increasing in the press pressure. When the pressure was increased to 0.3 MPa, the content ofintra-molecular hydrogen bonds O（6）H…O（3＇） increased by 15.65%, while the content ofintra-molecular hydrogen bonds O（2）H…O（6） and O（3）H…0（5） decreased by 23.34%. For the XRD analyses, the crystallinity and the fiber size of crystal plane were minimum when the pressure was 0.3 Mpa. In addition, the surface morphology of fiber gradually becomes smooth and stiff, showing a flat shape.
出处
《纸和造纸》
北大核心
2013年第9期24-28,共5页
Paper and Paper Making
基金
国家自然科学基金项目(NO.31170555
31200458)
国家教育部博士点基金资助项目(NO.20110172110015)
广东省高校优秀青年创新人才培养计划(LYM10014)
广东省科技计划项目(2010B01900026)
关键词
压榨
桉木纤维
氢键
微晶尺寸
结晶度
pressing
eucalyptus fibers
hydrogen bonds
crystallite size
crystallinity
