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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)。 |
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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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