纺织学报 ›› 2019, Vol. 40 ›› Issue (07): 1-76.doi: 10.13475/j.fzxb.20180701407

• 纤维材料 •    下一篇

基于N-甲基吗啉-N-氧化物溶剂制备聚芳砜酰胺/纤维素阻燃纤维

程筒1, 姚勇波2, 陈忠丽1, 靳宏1, 吴开建1, 王乐军3, 刘怡宁3, 张玉梅1()   

  1. 1. 东华大学 纤维材料改性国家重点实验室, 上海 201620
    2. 嘉兴学院, 浙江 嘉兴 314001
    3. 恒天纤维集团有限公司, 北京 100020
  • 收稿日期:2018-07-05 修回日期:2019-03-25 出版日期:2019-07-15 发布日期:2019-07-25
  • 通讯作者: 张玉梅
  • 作者简介:程筒(1994-),男,硕士生。主要研究方向为纤维素纤维的功能化。
  • 基金资助:
    国家自然科学基金项目(51773032);国家自然科学基金项目(21704034)

Preparation of flame retardant aromatic polysulfonamide/cellulose fibers with N-methylmorpholine-N-oxide monohydrate as solvent

CHENG Tong1, YAO Yongbo2, CHEN Zhongli1, JIN Hong1, WU Kaijian1, WANG Lejun3, LIU Yining3, ZHANG Yumei1()   

  1. 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China
    2. Jiaxing University, Jiaxing, Zhejiang 314001, China
    3. Hi-Tech Fiber Group Co., Ltd., Beijing 100020, China
  • Received:2018-07-05 Revised:2019-03-25 Online:2019-07-15 Published:2019-07-25
  • Contact: ZHANG Yumei

摘要:

为制备兼具阻燃和吸湿性能的纤维,采用N-甲基吗啉-N-氧化物(NMMO)水溶液为共溶剂,分别将纤维素(cellulose)和聚芳砜酰胺(PSA)溶解后进行共混制备纺丝液,通过干喷湿法纺丝制备PSA/cellulose共混纤维,并对纺丝液及共混纤维的结构和性能进行表征与分析。结果表明:NMMO对PSA具有良好的溶解性能,纺丝液均质、稳定,制备的共混纤维呈现出PSA富集于纤维表层的类皮-芯结构;PSA/cellulose纤维具有良好的阻燃性能、吸湿性能和力学性能,当纤维素质量分数达到30%时,共混纤维仍可达到阻燃纤维标准,其断裂强度为2.08 cN/dtex,无需后道牵伸处理就能达到较高的强度,此时PSA/cellulose纤维的回潮率提高为8%,具有良好的可染性。

关键词: 聚芳砜酰胺, 纤维素, N-甲基吗啉-N-氧化物, 阻燃纤维

Abstract:

In order to prepare fibers with flame retardant property and good hygroscopicity, N-methylmorpholine-N-oxide monohydrate (NMMO·H2O) was used as co-solvent to dissolve aromatic polysulfonamide (PSA) and cellulose, and the PSA/cellulose blend fibers were fabricated by dry-jet wet spinning. The structure and properties of spinning solution and blended fibers were characterized and analyzed. It is found that NMMO·H2O can dissolve PSA well, and the spinning solution is homogeneous and stable. An analogous ″sheath-core″ morphology is observed in the fibers as PSA distributed more in the sheath domain. The flame retardant property, moisture absorption ability and the mechanical property of the PSA/cellulose blended fibers are good. When the cellulose content is 30% in the blend fiber, the blend fibers still meet the requirement of flame retardant fiber standards. The tensile strength of the blend fiber is up to 2.08 cN/dtex, which shows a good tensile strength without post treatment. The moisture regain of PSA/cellulose fibers is up to 8%, and the dyeability is also improved.

Key words: aromatic polysulfonamide, cellulose, N-methylmorpholine-N-oxide monohydrate, flame retardant fiber

中图分类号: 

  • TQ341.5

图1

不同共混比PSA/cellulose/NMMO·H2O溶液分别在不同温度下的稳态流变曲线"

图2

PSA/cellulose /NMMO·H2O共混溶液分别在不同"

图3

黏流活化能随共混比的变化"

图4

PSA/cellulose纤维的表面SEM照片"

图5

PSA/cellulose纤维的截面SEM照片"

图6

PSA/cellulose纤维的LSCM图"

图7

PSA/cellulose纤维的XRD谱图"

表1

PSA/cellulose纤维的力学性能"

样品
名称
线密度/
dtex
模量/
(cN·dtex-1)
断裂
伸长率/%
断裂强度/
(cN·dtex-1)
PSA 4.02 17.1 56 1.14
PC9/1 3.43 39.7 43 1.52
PC8/2 4.24 44.9 23 1.55
PC7/3 2.65 71.5 14 2.08
cellulose 4.13 88.3 16 3.40

Tab 2

Flame retardancy and moisture regain of PSA/cellulose fibers"

样品 LOI值/% 离火自熄时间/s 回潮率/%
PSA 30.0 <1 5.9
PC9/1 28.7 <1 7.4
PC8/2 27.6 <2 7.7
PC7/3 26.6 <5 8.0
cellulose 18.0 不自熄 10.0

图8

不同共混比PSA/cellulose纤维染色情况对比图"

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