摘要
为研究稻草氧碱浆的打浆特性,采用PFI磨考察了不同打浆度对稻草氧碱浆滤水性能、纤维形态的影响,并分析其纸张强度性能的变化。结果表明:纸浆打浆度与保水值在打浆初期快速上升,在打浆后期上升趋缓,但是打浆度在打浆初期能快速上升至55~60°SR,而保水值快速上升阶段仅到45°SR左右;同时杂细胞的存在对滤水性能不利。打浆度35~75°SR过程中,纤维长度的变化不大,未除杂浆纤维长度下降最多约为7.3%,除杂浆纤维长度下降最多约为4.0%,而打浆对纤维表面的细纤维化作用明显。未除杂浆纸张耐破指数和抗张指数在打浆度65°SR时达到最佳,杂细胞的存在会对纸张的抗张强度提高形成一定的阻碍,除杂浆纸张耐破指数和抗张指数在65°SR以上的高打浆度下仍然保持上升的趋势,因而更倾向于在高打浆度、高结合强度要求的纸种当中获得应用。
The effects of different beating levels on drainability and fiber morphologies of rice straw alkali-oxygen pulps were investigated by PFI mill, and the strength performances of hand-sheets prepared by this pulp were also analyzed. The results showed that the changes of the beating degree and water-retention value were similar in the initial stage and later stage of beating. In the initial stage, the beating degree was rapidly increased to 55 -60°SR. Meanwhile, the water-retention value was increased to about 45~SR. When the beating degree was increased to 75°SR from 35°SR, the fiber length changed little with the maximum decrease rate of the pulp without non-fibrous cells （Pnof） of 7.3% and that of the pulp with non-fibrous cells （Pf） of 4% , and more fibrillated fibers were observed during the beating process. The non-fibrous cells played negative roles on both the improvement of pulp drainabilityand the strength properties. The best burst index and tensile index were obtained as the beating degree was 65°SR. In addition, an ever-increasing tendency was found in terms of burst index and tensile index of paper sheets of Pnof with higher beating degree（above 65°SR）.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2017年第2期148-154,共7页
Chemistry and Industry of Forest Products
基金
国家自然科学基金资助项目(51363013)
关键词
稻草氧碱浆
杂细胞
打浆
机械性能
滤水性能
rice straw alkali-oxygen pulp
non-fibrous cells
beating
strength properties
drainability
