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Study on Pre-impregnation Process of Pennisetum Sinese Grasses Chemi-mechanical Pulping
Received:September 18, 2024  
DOI：10.11980/j.issn.0254-508X.2025.03.015
Key Words:Pennisetum sinese grasses  chemical composition  fiber morphology  physical strength
Fund Project:广东省重点领域研究计划项目（2022B111108004）；山东省济宁市“全球揭榜”项目（2022JBZP003）。
Author NameAffiliationPostcode
CHENG Yao State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640
Shandong Sun Paper Industry Joint Stock Co.， Ltd.， Jining， Shandong Province， 272105 		272105
XU Jun* State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640
Shandong Sun Paper Industry Joint Stock Co.， Ltd.， Jining， Shandong Province， 272105 		272105
LU Junliang State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
ZHANG Xiaorui State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
WANG Xianghuai Rising Star Biotechnology （Guangzhou） Co.， Ltd.， Guangzhou， Guangdong Province， 515510 515510
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Abstract:In this study， Pennisetum sinese grasses was used as raw material， and chemi-mechanical pulping process was adopted. Through single factor experiment， the effects of pre-impregnation process on the chemical components of pulp， fiber morphology， and the physical strength of paper were investigated， from three aspects of alkali dosage， reaction temperature， and reaction time. The results showed that the alkali dosage had a greater impact on the total cellulose content， and the increase of reaction temperature or reaction time had a positive effect on the enhancement of the physical properties of paper. The optimum pre-impregnation conditions for chemi-mechanical pulping of Pennisetum sinese grasses were alkali dosage of 8%， reaction temperature of 90 ℃， and reaction time of 60 min. Under the best process conditions， the properties of the chemi-mechanical pulp and the physical strength of papers were good. The content of total cellulose in the pulp was 79.2%， the content of cellulose was 62.5%， the content of hemicellulose was 16.8%， and the content of lignin was 17.8%. The average fiber length was 0.75 mm， the coarseness was 0.14 mg/m， the area ratio of fine fiber was 16.9%， and the average width was 22.3 μm. The tensile index of paper was 42.8 N·m/g， the tearing index was 4.70 mN·m2/g， and the brusting index was 1.87 kPa·m2/g.
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