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Research on Improving Oxygen-alkali Pulping Performance of Wheat Straw by Biological Enzyme Pretreatment
Received:August 31, 2022  
DOI：10.11981/j.issn.1000-6842.2022.04.61
Key Words:wheat straw;oxygen-alkali pulping;sodium carbonate;biological enzyme;pulp property
Fund Project:国家重点研发计划（2019YFC1905904）；国家自然科学基金（32101464）；山东省重点研发计划（2019JZZY010326，2019JZZY010328，2021CXGC010601）；齐鲁工业大学（山东省科学院）科教产融合试点工程项目（2022PY57）。
Author NameAffiliationPostcode
JIA Qianqian* State Key Lab of Biobased Material and Green Papermaking/Key Lab of Pulp and Paper Science & Technology of Ministry of Education （Shandong Province）， Qilu University of Technology （Shandong Academy of Sciences）， Ji'nan， Shandong Province， 250353 250353
CHEN Jiachuan State Key Lab of Biobased Material and Green Papermaking/Key Lab of Pulp and Paper Science & Technology of Ministry of Education （Shandong Province）， Qilu University of Technology （Shandong Academy of Sciences）， Ji'nan， Shandong Province， 250353 250353
ZHANG Kai State Key Lab of Biobased Material and Green Papermaking/Key Lab of Pulp and Paper Science & Technology of Ministry of Education （Shandong Province）， Qilu University of Technology （Shandong Academy of Sciences）， Ji'nan， Shandong Province， 250353 250353
JIANG Xiao State Key Lab of Biobased Material and Green Papermaking/Key Lab of Pulp and Paper Science & Technology of Ministry of Education （Shandong Province）， Qilu University of Technology （Shandong Academy of Sciences）， Ji'nan， Shandong Province， 250353 250353
JIA Zhixin State Key Lab of Biobased Material and Green Papermaking/Key Lab of Pulp and Paper Science & Technology of Ministry of Education （Shandong Province）， Qilu University of Technology （Shandong Academy of Sciences）， Ji'nan， Shandong Province， 250353 250353
YANG Guihua State Key Lab of Biobased Material and Green Papermaking/Key Lab of Pulp and Paper Science & Technology of Ministry of Education （Shandong Province）， Qilu University of Technology （Shandong Academy of Sciences）， Ji'nan， Shandong Province， 250353 250353
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Abstract:
      Wheat straw biochemical pulp was prepared by sodium carbonate-oxygen pulping method after pretreated by biological enzymes （lipase， xylanase， composite enzyme of lipase and xylanase）， using wheat straw fiber as raw material. The effects of biological enzyme pretreatment on the fiber morphology of wheat straw， the fiber morphology of the pulp， and the physical strength of the as-prepared paper were studied. The results showed that after pretreated by composite enzyme the kappa value and whiteness of wheat straw pulp was 13.08 and 40.9% ISO， which was 1.34 lower and 6.8% ISO higher than that of its non-pretreated counterpart， respectively. The fine fiber content of the pulp prepared by sodium carbonate-oxygen pulping process decreased significantly； the tensile index of the paper reached 97.4 N∙m/g， which was 12.9% higher than that of the non-pretreated pulp （86.3 N∙m/g）， indicating that biological enzyme pretreatment can significantly improve the biochemical pulping performance of wheat straw fibers.
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