Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (07): 1-76.doi: 10.13475/j.fzxb.20180701407

• Fiber Materials •     Next Articles

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 E-mail:zhangym@dhu.edu.cn

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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

CLC Number: 

  • TQ341.5

Fig.1

Steady-state rheological behaviors of PSA/cellulose/NMMO·H2O solution at different temperatures"

Fig.2

Plots of estimate value and experimentalvalue of zero shear-rate viscosity for PSA/cellulose/NMMO solutions at different temperatures"

Fig.3

Change of flow activation energy with different PSA/cellulose/NMMO·H2O solutions"

Fig.4

SEM images of surface of PSA/cellulose fibers"

Fig.5

SEM images of cross-section of PSA/cellulose fibers"

Fig.6

LSCM images of PSA/cellulose fibers"

Fig.7

XRD patterns of PSA/cellulose fibers"

Tab.1

Mechanical properties of PSA/cellulose fibers"

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

"

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

Fig.8

Dyeability of PSA/cellulose fibers"

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