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Comparison of Chemical Mechanical Pulping Properties of Wheat Straw Impregnated with KOH and NaOH
Received:March 05, 2021  
DOI：10.11980/j.issn.0254-508X.2021.05.005
Key Words:wheat straw  chemical mechanical pulp  KOH  NaOH  pulp yield
Fund Project:国家重点研发计划项目（2019YFC1905900）；泰山学者工程。
Author NameAffiliationPostcode
GE Yinkai Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp and Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Provience， 250353 250353
JI Xingxiang Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp and Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Provience， 250353 250353
TIAN Zhongjian Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp and Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Provience， 250353 250353
CHEN Jiachuan Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp and Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Provience， 250353 250353
MA Hao Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp and Paper Science and Technology of Education Ministry of China， Qilu University of Technology （Shandong Academy of Sciences）， Ji’nan， Shandong Provience， 250353 250353
WANG Dongxing Shandong Century Sunshine Paper Group Company Co.， Ltd.， Weifang， Shandong Provience， 262400 262400
SHAO Xuejun Shandong Century Sunshine Paper Group Company Co.， Ltd.， Weifang， Shandong Provience， 262400 262400
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Abstract:In this study， the effects of different pulping conditions were investigated including KOH and NaOH dosages of 3%~7% （KOH basis） and immersion times of 10~80 min on the physical and chemical properties of wheat straw chemical mechanical pulp and paper. The results showed that under normal pressure and a mild immersion temperature of 95℃， the wheat straw chemical mechanical pulp impregnated with KOH had higher tightness and strength than that impregnated with NaOH. During the impregnation process， due to the strong delignification ability of KOH， the pulp yield of wheat straw chemical mechanical pulp impregnated with KOH was lower. KOH was relatively alkaline， resulting in a higher pH value of the residual liquid. In addition， KOH had a stronger ability to destroy the crystallization zone than NaOH， so the fiber morphology of the wheat straw pulp with KOH impregnation was better than that with NaOH impregnation.
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