Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (10): 127-133.doi: 10.13475/j.fzxb.20181000907

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation of composite phase change microcapsules and its application on cotton fabrics

YANG Jian1, ZHANG Guoqing1, LIU Guojin2, KE Xiaoming2, ZHOU Lan1,3()   

  1. 1. Engineering Research Center for Eco-Dyeing and Finishing of Textiles, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. Provincial Key Laboratory of Fiber Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    3. Large Land Blue Co., Ltd., Taizhou, Jiangsu 225700, China
  • Received:2018-10-19 Revised:2019-07-18 Online:2019-10-15 Published:2019-10-23
  • Contact: ZHOU Lan E-mail:lan_zhou330@163.com

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Abstract:

In order to obtain a heat storage temperature-regulating textile with low cost, high phase transformation and suitable phase transition temperature, stearic acid and lauric acid blended in different proportions were preferred as the phase change core material, and poly(styrene-butyl acrylate) was used as the wall material to prepare stearic acid-lauric acid/poly(styrene-butyl acrylate) phase change microcapsule by emulsion polymerization, and the stearic acid-lauric acid phase change microcapsules were treated on the cotton fabrics by padding process. The results show that the stearic acid-lauric acid with the mass ratio of 1∶9 is used as the phase change core material. The melting peak phase transition temperature is 42.12 ℃ and the latent heat of phase change is 187.80 J/g. The stearic acid-lauric acid/poly(styrene-butyl acrylate) phase change microcapsules prepared with the core/wall ratio of 1∶1 have good sphericity and the coverage rate is as high as 82.29%. The related melting peak phase transition temperature is 37.45 ℃, the latent heat of phase change is 77.27 J/g, and the initial decomposition temperature (150 ℃) is about 50 ℃ higher than the pure stearic acid-lauric acid phase change core material, having good thermal stability. After padding finishing, the peak phase transition temperature and the latent heat of phase change of the cotton fabric are 39.47 ℃ and 25.41 J/g, which has good heat storage and temperature regulation function.

Key words: composite phase change core material, microcapsule, stearic acid, lauric acid, heat storage and temperature regulation, cotton fabric

CLC Number: 

  • TS195.9

Fig.1

DSC curves of SA-LA composite phase change core materials blended in different proportions. (a) Stearic acid and lauric acid; (b) Stearic acid and lauric acid blended in a mass ratio of 1∶9 and 9∶1; (c) Stearic acid and lauric acid blended in a mass ratio of 3∶7, 5∶5, and 7∶3"

Tab.1

Latent heat and peak temperatures of phase transitions of SA-LA composite cores blended in different proportions"

硬脂酸与月桂酸质量比 相变潜热/(J·g-1) 峰值温度/℃
0∶10 187.21 47.95
1∶9 188.03 42.40
3∶7 175.47 42.63
5∶5 113.16 43.06
7∶3 80.97 41.24
9∶1 19.10/162.82 36.83/69.12
10∶0 218.15 72.32

Fig.2

Particle size distribution curve and FESEM image of SA-LA microcapsules. (a) Particle size distribution curve of microcapsules; (b) FESEM image of microcapsules (×15 000)"

Fig.3

DSC curves of stearic acid-lauric acid composite core material, poly (styrene-butyl acrylate) wall material and phase change microcapsules"

Fig.4

TG curves of stearic acid-lauric acid composite core material, poly (styrene-butyl acrylate) wall material and phase change microcapsules"

Fig.5

FESEM images of original cotton fabric and cotton fabric padded with wall material and microcapsules. (a)Original cotton fabric; (b)Cotton fabric padded with wall material;(c)Cotton fabric padded with SA-LA microcapsules"

Fig.6

DSC curves of original cotton fabrics and cotton fabrics padded with poly(styrene-butyl acrylate) wall materials and stearic acid-lauric acid microcapsules"

Tab.2

DSC data of originl cotton fabrics and cotton fabrics padded with poly(styrene-butyl acrylate) wall materials and stearic acid-lauric acid microcapsules"

样品编号 质量增加率/% 相变潜热/(J·g-1) 峰值温度/℃
a 0 0 —
b 17.48 0 —
c 32.17 25.41 39.47
d 26.23 19.58 38.96

Fig.7

Thermal image maps of original cotton fabrics and cotton fabrics padded with wall materials and microcapsules in different concentrations. (a) Original cotton fabric; (b)Cotton fabric padded with wall material; (c)Cotton fabric padded with microcapsules in 12%; (d)Cotton fabric padded with microcapsules in 24%"

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