基于AFM的107杨纤维表面形貌特征研究

以107杨为研究对象,采用过氧化氢和冰醋酸混合液对应拉木和正常木进行处理获得2种离析纤维;采用铬酸对正常木进行处理获得1种离析纤维;采用硫酸盐制备正常木化学浆获得1种化学浆纤维,并取出一半化学浆进行打浆处理获得1种打浆纤维。使用原子力显微镜(AFM)对上述5种不同处理方法获得的纤维表面形貌进行观察比较。结果表明,应拉木纤维比正常木纤维容易观测到清晰初生壁表面;铬酸离析方法比过氧化氢和冰醋酸混合液离析方法容易观测到清晰初生壁表面;相比离析纤维,化学浆纤维次生壁微纤丝的定向排列方式清晰可见;打浆后纤维较化学浆纤维,微纤丝定向排列被干扰,出现分丝帚化。

Superficial topography feature of fiber in poplar 107 determined by AFM

In this paper, two kinds of fibers of poplar 107 (fibers of tension wood and fibers of normal wood) were obtained by macerating with mixture of hydrogen peroxide and glacial acetic acid, respectively. The macerating fibers were obtained by chromic acid. Meanwhile, other two kinds of fibers in normal wood, i.e., chemical pulp fibers was obtained with kraft pulping and refining chemical pulp fibers was prepared by further pulping the chemical pulp fibers . Topography features of five kinds of different treatment fiber surfaces were scanned by atomic force microscope (AFM), and that were further observed and compared. The results showed that the primary wall surfaces of fibers in tension wood were clearer to observe than those in normal wood, and the primary wall surfaces of fibers macerated by chromic acid were clearer to observe than that by mixture of hydrogen peroxide and glacial acetic acid. Compared with macerating fibers, the arrangement of microfibrils in secondary wall of chemical pulp fibers could be revealed clearly. Compared with chemical pulp fibers, the arrangement of the microfibrils was disordered, which presented fibrillating.