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Study on Pulp Properties of Different Pulping Methods of Hemp Bast Fiber
Received:January 09, 2023  
DOI：10.11980/j.issn.0254-508X.2023.07.006
Key Words:industrial hemp  bast fiber  pulping  beating  paper performance
Fund Project:华南理工大学造纸与污染控制国家工程研究中心自主创新研究基金（2020ZY01）。
Author NameAffiliationPostcode
SHEN Huiying National Engineering Research Center for Papermaking and Pollution Control， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
LEI Yichao* National Engineering Research Center for Papermaking and Pollution Control， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
CHEN Lingchen National Engineering Research Center for Papermaking and Pollution Control， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
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Abstract:In this paper， the bast fiber of industrial hemp was used as raw material. The chemical composition and fiber morphology were analyzed. The results showed that the industrial hemp fiber had a high content of nitrate-ethanol cellulose， reaching 70.6%， while the lignin content was relatively low， only 9.6%. The average length of the fiber was 20.47 mm， the average width of the fiber was 22.50 μm， and the length and width ratio was 909.78， which was a high quality raw material for paper making. Then three different methods of soda-anthraquinone （NaOH-AQ）， sulfate（KP） and alkaline subsodium-anthraquinone （AS-AQ） were used to prepare the pulp. Compared with commercial pulp， AS-AQ pulp had obvious advantages over NaOH-AQ pulp and KP pulp in terms of pulp yield， brightness， intrinsic viscosity and paper physical strength performance. So that AS-AQ was an ideal method for hemp bast fiber.
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