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Preparation and Performance Characterization of Spinning Pulp of Lyocell Fiber
Received:October 07, 2020  
DOI：10.11980/j.issn.0254-508X.2021.02.002
Key Words:softwood pulp  dissolving pulp  Lyocell fiber  cellulose/NMMO solution  laser scanning confocal microscope （LSCM）
Fund Project:国家重点研发计划（2017YFB0309501）。
Author NameAffiliationPostcode
PAN Yile State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
XU Jigang State key Lab of Biobased Fiber Manufacturing Technology， China Textile Academy， Beijing， 100025 100025
QIAN Liying State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
HE Beihai State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
LI Junrong State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
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Abstract:In this paper， in order to meet the standard of spinning pulp of Lyocell fiber， softwood pulp was used as raw material to prepare the dissolving pulp by cold alkali extraction， hydrogen peroxide depolymerization， acetic acid acidification and other processes. The results showed that the dissolving pulp prepared by softwood pulp reached the standard of dissolving pulp for the standard of spinning pulp of Lyocell fiber. The α-cellulose content of obtained pulp reached higher than 96.12%， the degree of polymerization of cellulose dropped to 653， the ash content was 0.07%， the iron ion content was less than 4 mg/kg， and the solubility of prepared pulp in N-methylmorpholine-N-oxide （NMMO） was significantly improved.
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