Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (03): 15-19.doi: 10.13475/j.fzxb.20190408306

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of flame-retardant viscose fiber/dithiopyrophosphate incorporated with graphene oxide

MA Junzhi1,2, WANG Dong1, FU Shaohai1()   

  1. 1. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
    2. CHTC Helon (Weifang) New Materials Co., Ltd., Weifang, Shandong 261100, China
  • Received:2019-04-30 Revised:2019-12-16 Online:2020-03-15 Published:2020-03-27
  • Contact: FU Shaohai E-mail:shaohaifu@hotmail.com

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Abstract:

To improve the flame-retardant and mechanical properties of viscose fiber/bisneopentyl glycol dithiopyrophosphate (VF/DDPS), graphene oxide (GO) was incorporated into VF/DDPS matrix as synergistic flame retardant to prepare VF/DDPS/GO composite fiber through wetting spinning. Using thermogravimetry, limiting oxygen index tester, microscale combustion calorimeter and single fiber tensile tester as performance indices, the effect of GO on the thermal, flame-retardant and mechanical properties of VF/DDPS composite fiber were studied. The results show that compared to VF/DDPS, when incorporating 2.0% GO, the char residues of VF/DDPS/GO composite fiber increases from 20.0% to 29.7%, limiting oxygen index rises from 27.8% to 29.1%, peak heat release rate decreases from 141.5 to 99.4 W/g and dry/wet breaking strength increases from 2.08,0.96 cN/dtex to 2.20,1.17 cN/dtex. It is concluded that GO could enhance the graphitic degree and compactness of char residues, which strengthens the barrier action of heat and mass.

Key words: viscose fiber, graphene oxide, bisneopentyl glycol dithiopyrophosphate, flame-retardant fiber, flame-retardant agent

CLC Number: 

  • TS102.6

Tab.1

Composition of flame-retardant viscose fiber%"

样品
编号		 α-纤维素
质量分数		 DDPS对α-纤维素
质量分数		 GO对α-纤维素
质量分数
1# 100 0 0.0
2# 100 18 0.0
3# 100 18 0.5
4# 100 18 1.0
5# 100 18 1.5
6# 100 18 2.0

Fig.1

Surface and cross section morphology of viscose fiber with 2.0% GO. (a) SEM image of fiber surface; (b) SEM image of fiber cross section; (c) Frozen section TEM image of fiber"

Fig.2

TG(a)and DTG(b)curves of viscose fibers with different components"

Fig.3

LOI values of viscose fibers with different components"

Fig.4

Heat release rate curves of viscose fibers with different components"

Fig.5

Raman spectrum of char residues of fibers"

Fig.6

SEM images of char residues of fibers"

Tab.2

Mechanical properties of viscose fibers with different components"

样品
编号		 断裂强度/(cN·dtex-1) 断裂
伸长率/%
干 湿
1# 2.26 1.14 19.2
2# 2.08 0.96 19.4
3# 2.17 1.06 19.8
4# 2.23 1.14 18.5
5# 2.29 1.26 18.1
6# 2.20 1.17 17.6
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