摘要
用原子力显微镜(AFM)研究了马尾松CTMP纤维表面的超微结构。通过AFM较容易在单根纤维上观察到复合胞间层(CML)和S1层;从单根纤维分丝出的细纤维表面较平整,微细纤维(Microfibrils)定向排列;而纤维碎片表面粗糙,微细纤维排列错杂。对相图分析可知,CTMP原浆纤维的S1层被低相位的颗粒状物质覆盖,这些颗粒经热水、丙酮或H2O2处理可被去除。另外,热水处理后,暴露出大量疏水性颗粒,其中高相位的颗粒能被丙酮溶出,推断其为抽出物;不能被丙酮溶出的补丁状颗粒在H2O2的作用下发生碎裂,可能是木素。几种处理都不能完全除去CML层的颗粒状物质,但对S1层都起到了亲水化和均质化的作用。
Surface ultrastructure of Masson pine CTMP fibers were investigated with atomic force microscope （AFM）. The results indicated that the compound middle lamella （CML） and first layer of the secondary wall （S1 layer） could be easily observed in single fibers. The surface of microfibrils was relatively smooth, on which the orientation of microfibrils was regular; while the surface of fiber fragments was roughness, with random orientating microfibrils. The phase images analysis showed that the surface of Sl layer was covered by granules with low phase. These granules were efficiently removed by the following treatments such as hot water, acetone or hydrogen peroxide. However, after treatment with hot water a large amount of hydrophobic particles exposed. The blocklike particles with high phase were proved to be extractives for their dissolvability in acetone; while patch-like ones were probably lignin, which can be disintegrated in the hydrogen peroxide bleaching. All treatments did not completely removed the granular particles in CML, but contributed to a more hydrophilic and homogeneous surface of S1 layer.
出处
《中华纸业》
CAS
北大核心
2008年第18期16-20,共5页
China Pulp & Paper Industry
基金
国家高技术研究发展计划(863计划)重点项目(2007AA100704)资助
