纸张三维结构的CLSM表征及纸张特性研究

Effect of Fiber Property on Paper Performance Based on the CLSM Characterization

关键词:  激光扫描共聚焦显微镜  纤维  蔗渣浆  纸张性能  孔隙率

Key Words:confocal laser scanning microscopy  fiber  bagasse pulp  paper sheet performance  porosity

摘要:为采用纤维复配的方法提高蔗渣浆纸张的物理性能，探究了棉浆、马尾松浆、竹浆、桉木浆以及蔗渣浆自身特性和纸张结构。首先检测不同浆种纤维的自身特性，然后提出了一种基于激光扫描共聚焦显微镜（CLSM）的纸张三维结构表征方法，计算纸张的孔隙率用于表征纤维间的相对结合面积，两者结合分析了棉浆、马尾松浆、竹浆、桉木浆与蔗渣浆配抄纸张物理性能的贡献因素。结果表明，CLSM所得到的纸张孔隙率计算值与实验检测值的相对误差小于8%；配抄后纸张物理性能的实验值均大于计算值，具有协同作用，配抄纤维对蔗渣浆纸张物理性能提升的贡献度从大到小依次为：纤维结合能力、纤维自身强度、纤维长度，其中配抄50%马尾松浆的蔗渣浆纸张物理性能提高最大，纸张的抗张指数、耐破指数、撕裂指数分别提高56.8%、99.3%、108.1%。

Abstract:In order to improve the paper physical performances of bagasse pulp fiber by blending other fiber raw materials, the properties and paper structures of cotton pulp, masson pine pulp, bamboo pulp, eucalyptus pulp, and bagasse pulp were studied, respectively. Firstly, the properties of different pulp fibers were analyzed. Subsequently, a novel characterization method of paper three-dimensional structure was proposed based on confocal laser scanning microscopy (CLSM) to characterize the relative bonding area between fibers by calculating the porosity of paper sheet. And the contributions of the fiber properties to the physical performances of paper sheets were also analyzed. Lastly, to verify the influences of different pulp fibers on the physical performances of paper, the four kinds of pulp fibers, cotton pulp, masson pine pulp, bamboo pulp, eucalyptus pulp, were individually mixed with the bagasse pulp. The testing results showed that the relative error between the calculated value of porosity obtained by CLSM and the experimental value was less than 8%. Moreover, all the experimental values of the physical performances of the papers were greater than the calculated values, demonstrating a synergistic effect. From large to small, the contributions of the studied fibers to the improvement of the physical performances of bagasse pulp paper were as follows: fiber bonding capacity, fiber strength and fiber length. The performances of the paper produced by the bagasse pulp with mixing 50% masson pine pulp were improved mostly. The tensile strength index, bursting strength and tear strength index of the paper sheet were increased by 56.8%, 99.3% and 108.1%, respectively.