Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (09): 15-21.doi: 10.13475/j.fzxb.20180901407

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of n-eicosane/cellulose diacetate phase change filter material

GUO Xinyue1, YANG Zhanping2, SONG Xiaomei2, XU Yang1()   

  1. 1. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
    2. Nantong Cellulose Fibers Co., Ltd., Nantong, Jiangsu 226008, China
  • Received:2018-09-05 Revised:2019-02-04 Online:2019-09-15 Published:2019-09-23
  • Contact: XU Yang E-mail:zh3212@vip.sina.com

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Abstract:

In order to achieve rapid cooling of flue gas, the composite phase-change gas filtration materials were prepared by using the common tobacco filter material diacetate fiber as the carrier matrix and n-eicosane as the phase change material, and the cooling rate of the composite filter materials were further accelerated by doping single-walled carbon nanotubes. The influence of the content of n-eicosane on the spinnability of compound spinning liquid and on the apparent morphology and thermal properties of composite phase change filter materials and the influence of the content of single-walled carbon nanotubes on the apparent morphology, thermal properties and heat storage velocity of composite phase change filter materials were discussed. The results show that adding n-eicosane lowers the spinnability of the compound spinning liquid, but with the increase of the content of n-eicosane, the spinnability and plasticity of the spinning solution are improved, the average fiber diameter increases, and the melting enthalpy of filter materials increases accordingly. When the mass ratio of n-eicosane to cellulose diacetate is 3∶10, the highest enthalpy efficiency of the filter material is 84.1%. As the content of single-walled carbon nanotubes increases, the instantaneous heat absorption rate of the filter material increases. When the doping amount is 1.0%, the instantaneous heat absorption rate of the filter material increases from 0.062 ℃/s of pure diacetate fiber filter material to 0.202 ℃/s.

Key words: flue gas cooling, diacetate fiber, n-eicosane, single-walled carbon nanotube, electrospinning, composite phase change filter material

CLC Number: 

  • TQ342.94

Tab.1

Spinning parameters of pure diacetate fiber spinning solution and composite spinning solution with different n-eicosane mass fractions"

正二十烷与二醋酸
纤维素质量比		 表观黏度/
(Pa·s)		 表面张力/
(mN·m-1)		 可纺性指标/
(cm·s-1)
0:10 3 080.0 11.6 0.004
1:10 105.9 12.4 0.117
3:10 290.0 17.7 0.061
5:10 419.1 30.6 0.073
7:10 1 433.0 12.9 0.009

Fig.1

SEM images of composite phase change filter materials with different mass ratios of cellulose diacetate to n-eicosane"

Fig.2

SEM images of cellulose diacetate/ n-eicosane/single-walled carbon nanotubes composite phase change filter materials with different dosages of single-walled carbon nanotubes"

Fig.3

DSC curves of composite phase change filter materials. (a)n-eicosane,composite phase change filter materials with different mass ratios of cellulose diacetate to n-eicosane;(b)Cellulose diacetate/n-eicosane/single-walled carbon nanotubes composite phase change filter material with different dosages of single-walled carbon nanotubes"

Tab.2

Thermal parameters of n-eicosane and cellulose diacetate/n-eicosane composite phase change filter materials"

正二十烷与
二醋酸纤维
素质量比		 熔融温
度/℃		 熔融热焓/
(kJ·kg-1)		 理论热焓/
(kJ·kg-1)		 相变焓
效率 /%
正二十烷粉末 37.8 241.7
1:10 37.1 16.0 22.0 73.0
3:10 37.2 46.9 55.8 84.1
5:10 37.8 61.6 80.6 76.5
7:10 37.0 74.7 99.5 75.0

Fig.4

Time-temperature curves of diacetate fibers and cellulose diacetate/ n-eicosane/ single-walled carbon nanotubes composite phase change filter materials with different dosages of single-walled carbon nanotubes. (a)Time-temperature curves;(b)Instantaneous time-temperature curves"

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