Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (07): 19-24.doi: 10.13475/j.fzxb.20200902906

• Invited Column: New Flame Retardant Technology for Textile Materials • Previous Articles     Next Articles

Preparation and property of flame retardant polyester/calcium alginate fiber composites

XU Kai1,2, TIAN Xing1, CAO Ying2, HE Yaqi2, XIA Yanzhi1, QUAN Fengyu1,2()   

  1. 1. State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao, Shandong 266071, China
    2. College of Materials Science and Engineering, Qingdao University, Qingdao, Shandong 266071, China
  • Received:2020-09-14 Revised:2021-03-01 Online:2021-07-15 Published:2021-07-22
  • Contact: QUAN Fengyu E-mail:quanfengyu@qdu.edu.cn

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Abstract:

Facing the smoldering phenomenon of calcium alginate, the flame retardant composite was prepared by blending flame retardant polyester (FR-PET) and calcium alginate fiber (Ca-Alg) with a standard fiber dissociator. The flame-retardancy, thermal stability and morphology of the residue after conic calorimetry were characterized. The results show that when the mass ratio of FR-PET to Ca-Alg is 40∶60, the smoldering time of the composite is less than 1 s and the damage length is 12 mm. In the process of combustion, the melted FR-PET covers the surface of Ca-Alg fiber, which not only avoids the melting drop of FR-PET but also isolates the contact between Ca-Alg and air, thus inhibiting the smoldering of Ca-Alg. Furthermore, the composite has lower total heat release and total smoke production compared with FR-PET. In the third stage of mass loss of composites (350-600 ℃), the results of thermogravimetric analysis show that the intermediate products of thermal decomposition of Ca-Alg avoid the rapid decomposition of FR-PET, improves the stability of the composites and promotes the formation of residual carbon.

Key words: composite fiber, functional fiber, calcium alginate fiber, flame retardant polyester, smoldering, melting drop, flame retardant mechanism

CLC Number: 

  • TQ341.9

Tab.1

LOI values and vertical flammability test results of flame retardant polyester/calcium alginate fiber composites"

样品编号 LOI值/% 续燃时间/s 阴燃时间/s 损毁长度/mm
1# 24.5 0 — 完全损毁
2# 24.7 0 1 388 56
3# 25.1 0 240 8
4# 28.3 0 <1 12
5# 26.4 0 30 24
6# 30.8 3 0 39

Tab.2

Cone calorimetric test data of flame retardant polyester/calcium alginate fiber composites"

样品
编号 		引燃
时间/s 		热释放速率峰
值/(kW·m-2) 		总热释放量/
(MJ·m-2) 		烟释放速率峰
值/(m2·s-1) 		总烟释放量/
(m2·m-2)
1# 58 136 7.12 0.007 0 0.05
4# 49 257 11.29 0.075 2 1.77
6# 68 316 12.66 0.203 1 5.62

Fig.1

Cone calorimetric curves of flame retardant polyester/calcium alginate fiber composites. (a)Heat release rate;(b) Total heat release;(c) Smoke release rate;(d) Total smoke production;(e) CO production;(f)CO2 production "

Fig.2

TG(a)and DTG(b)curves of flame retardant polyester/calcium alginate fiber composites"

Fig.3

SEM images of residues of flame retardant polyester/calcium alginate fiber composites after cone calorimetry"

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