摘要
为提高溶解浆进行粘胶纤维产品生产的加工性能及减少二硫化碳的排放,采用PFI(papirindustriens forsknings institut)磨打浆和瓦利打浆机打浆这2种湿法机械处理,以改善竹溶解浆的反应性能。以预水解硫酸盐法竹溶解浆为原料,考察PFI磨打浆及瓦利打浆机打浆对溶解浆反应性能及纤维形态的影响,并对同等打浆度条件下的2种湿法机械处理的效果进行比较。PFI磨和瓦利打浆机分别在打浆度为60.5°SR(15000 r)及36.4°SR(30 min)的优化工艺条件下,Fock反应性能从68.3%分别提高到73.2%和84.0%,粘胶过滤性能由“不通过”到粘胶过滤值分别为3196.1 s和2115.6 s。同时,上述2种处理方式均使纤维粗度和长度下降,细小纤维含量、比表面积和总孔隙量增加,且使聚合度损失小。同等打浆度条件下,基于瓦利打浆机对纤维更多的剪切行为,瓦利打浆机打浆对反应性能的提高效果更为显著。
In order to improve the reactivity of dissolving pulp and reduce the emission of carbon disulfide in viscose rayon production,papirindustriens forsknings institut(PFI)refining and valley beater(VB)beating were adopted.The effects of different PFI revolutions and VB beating time on the reactivity and related characteristics of dissolving pulp were investigated.And the effects of wet mechanical treatments with the same beating degree on bamboo kraft-based rayon-grade dissolving pulp were compared.The Fock reactivity of resultant pulp increased from 68.3%to 73.2%and 84.0%,and viscose filterability improved from“no pass”to 3196.1 s and 2115.6 s after PFI refining with 60.5°SR(15000 r)and VB beating with 36.4°SR(30 min),respectively.Such treatments could significantly increase the fines content,specific surface area and total pore volume with slight loss of polymerization degree,while reducing fiber coarseness and length.Under the same degree of beating,the effect of VB beating on the enhancement of reactivity was more obvious than PFI refining based on its main cutting action.
作者
陈秋艳
马晓娟
黄六莲
CHEN Qiu-yan;MA Xiao-juan;HUANG Liu-lian(College of Life Science,Fujian Agriculture and Forestry University,Fuzhou 350108,Fujian,China;Key Laboratory of Pulp and Paper Science&Technology of Ministry of Education/Shandong Province,Qilu University of Technology, Ji'nan 250353,Shandong,China;College of Materials Engineering,Fujian Agriculture and Forestry University,Fuzhou 350108,Fujian,China)
出处
《西北林学院学报》
CSCD
北大核心
2020年第4期223-228,共6页
Journal of Northwest Forestry University
基金
国家自然科学基金项目(31770632)
制浆造纸科学与技术教育部/山东省重点实验室开放基金(KF201707)。
关键词
反应性能
粘胶级竹溶解浆
打浆
纤维形态
纤维比表面积
reactivity
bamboo viscose grade dissolving pulp
beating
fiber morphology
fiber specific surface area
