Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (10): 79-84.doi: 10.13475/j.fzxb.20181002306

• Textile Engineering • Previous Articles     Next Articles

Protective function of SiO2 aerogel hybrid/aramid nonwovens fabric

WANG Lu1, DING Xiaojun2, XIA Xin2, WANG Hong3, ZHOU Xiaohong1()   

  1. 1. Materials and Textile Institute, Silk College, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. National Experiment Teaching Center of Clothing, Hangzhou, Zhejiang 310018, China
    3. Zhejiang Prui Technology Co., Ltd., Hangzhou, Zhejiang 311215, China
  • Received:2018-10-12 Revised:2019-06-26 Online:2019-10-15 Published:2019-10-23
  • Contact: ZHOU Xiaohong E-mail:zhouxh314@163.com

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Abstract:

In order to research the effect of SiO2 aerogel on the anti-pressure, flame retardant protective functions of aramid nonwoven fabric, using aramid nonwoven fabric as the skeleton material, applying SiO2 aerogel to the surface of it, preparing SiO2 aerogel hybrid aramid nonwoven protective material. The structure was characterized by scanning electron microscopy, and its compression function was analyzed with a universal material testing machine. Finally, using the thermal constant analyzer and the flame hand system, the flame retardant insulation properties of the prepared protective materials were tested and evaluated. The results show that the SiO2 aerogel is filled into the gap between the fibers of the aramid nonwoven fabric in blocks or granules of different sizes. SiO2 aerogel can enhance the pressure resistance of aramid nonwoven fabric and reduce its thermal conductivity, the total absorbed energy value of the aramid nonwoven fabric is reduced after the hybrid SiO2 aerogel. It is illustrated that the SiO2 aerogel can significantly enhance the thermal protection effect of aramid nonwoven fabric.

Key words: SiO2 aerogel, aramid nonwoven fabric, flame retardant and heat insulation, flame hand system, thermal protective fabric

CLC Number: 

  • TS106.5

Tab.1

Parameter of samples"

样品
编号		 厚度/
mm		 面密度/
(g·m-2)		 体积密度/
(10-3g·cm-3)
1# 0.52 64.4 124
2# 0.90 261.8 291
3# 0.58 100.3 173
4# 1.45 329.1 235
5# 1.51 372.1 246
6# 2.05 470.7 233
7# 1.95 409.3 225

Fig.1

Morphological changes of aramid nonwoven fabric before and after hybrid SiO2 aerogel"

Fig.2

Load-displacement curve of sample"

Fig.3

Stress-strain curve of sample"

Tab.2

Compression work and heat conductivity coefficient of sample"

样品
编号		 压缩
功/J		 能量吸收能力/
(kJ·m-3)		 导热系数平均
值/(W·m-1·K-1)
1# 0.359 0.182 0.056 79
2# 0.563 0.221 0.045 50
3# 0.429 0.423 0.034 69
4# 0.641 0.190 —
5# 0.631 0.202 —
6# 0.913 0.149 —
7# 0.799 0.101 —

Fig.4

Flame hand site map and model map. (a) Site;(b) Palm hand back model"

Fig.5

Sample 1# real-time temperature curve of each sensor within 8 s"

Fig.6

Real-time temperature curve of sensor 1 in each sample within 8 s"

Fig.7

Sample 1# real-time heat flux curve of each sensor within 8 s"

Fig.8

Real-time heat flux curve of sensor 1 in 8 s of each sample"

Tab.3

Flame hand burn calculation"

样品
编号		 总的吸
收能量/
kJ		 烧伤程度占比/% 平均
热通量/
(kW·m-2)
没有
烧伤		 一级
烧伤		 二级
烧伤		 三级
烧伤
1# 12.190 — — 11.76 88.24 35.5
2# 11.034 — — 38.24 61.76 19.8
4# 10.400 — — 55.88 44.12 10.5
5# 8.657 — — 88.24 11.76 7.9
6# 5.931 35.29 11.77 52.94 — 4.7
7# 6.153 8.82 — 91.18 — 8.2

Fig.9

Flame hand burn grade model for each sample"

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