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Study on Preparation of Neosinocalamusaffinis Fluff Pulp by Mild Alkali Pretreatment
Received:January 19, 2022  
DOI：10.11980/j.issn.0254-508X.2022.04.004
Key Words:neosinocalamusaffinis  alkali treatment  kraft pulping  screening  fluff pulp
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
WANG Mengdi 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
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Abstract:In this study， using neosinocalamusaffinisas raw materials，on the basis of traditional kraft pulping process， the fluff pulp was produced by mild alkali pretreatment to remove hemicellulose and screen impurities with Bauer-McNett classifier to select long fibers. The effects on raw material chemical composition， pulp properties， fiber morphology and final water absorption properties were investigated. The results showed that under the condition of pretreatment with 100 g/L sodium hydroxide solution for 1 h at 80℃， 55.56% of ash and 42.18% of hemicellulose were removed. In addition， the fiber length of the pretreated pulp by screening with 30 mesh reached 2.29 mm.Subsequently， the pulp was subjected to ECF bleaching treatment to produce qualified fluff pulp，and its whiteness was 90.5%，the water absorption time was 7.19 s， the water absorptioncapacity was 13.15 g/g， the specific volume was 24.62 cm3/g and bursting strength was 752.0 kPa，which was basically similar to the commercial fluff pulp.
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