Highly permeabale paper fabricated with Cold NaOH/Thiourea Treated Smooth Cellulose Fibers

4th International Conference on Energy Equipment Science and Engineering

Xiong, Xiaomin^1 ; Zhao, Chuanshan^1 ; Wang, Sha^1 ; Han, Wenjia^1 ; Jiang, Yifei^1

State Key Laboratory of Bio-based Materials and Green Papermaking, QiluUniversity of Technology, Shandong Province, Jinan

250353, China^1

关键词: After-treatment;    Cellulose fiber;    Fiber crystallinity;    Insulation materials;    Low temperature treatment;    Surface etching;    Treatment conditions;    Wood pulp fibers;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/242/3/032018/pdf
DOI  :  10.1088/1755-1315/242/3/032018

来源: IOP

【 摘 要 】

High-permeability paper has a wide range of applications in air filtration media, packaging materials, sound insulation or insulation materials. However, there are still some limitations in the current method for preparing high-thickness and high-permeability paper. In this paper, NaOH/thiourea is used to gently treat wood pulp fibers to improve the bulk of paper. The effects of low temperature treatment time on the surface morphology and physical properties of the paper were investigated. The results showed that, with the increase of mild pretreatment time, the length of fiber decreased slowly, the content of fine fiber was less, and the fiber became swollen and bent and kinky. The effect of thiourea dosage on fiber was further investigated when the treatment time was 20 min. The results showed that when the treatment condition was NaOH of 8 wt% and thiourea of 8 wt%, the length was shorten by 14.51%, the fine fiber content was reduced by 60.62%, and the surface etching phenomenon was aggravated compared with the untreated fiber. The SEM and AFM analysis showed that the fiber surface was obviously folded and the roughness increased by 158%. At the same time, the bulk of paper increased by 39.53% and the average pore diameter of the paper increased from 28.79 μm to 49.62 μm, the air permeability increased by 105.38%. FT-IR indicated no new changes in the chemical structure after treatment. XRD indicated that the fiber crystallinity after treatment decreased by 2.17%.