Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (01): 19-25.doi: 10.13475/j.fzxb.20180201607

• Fiber Materials • Previous Articles     Next Articles

Influence of wet/heat treatment on structure and properties of dog hair

LIU Bingqian1, SHENG Dan2, GONG Xiaobao1, CAO Genyang1, ZHANG Tao3()   

  1. 1. State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan, Hubei 430200, China
    2. School of Textiles and Clothing, Jiangnan University, Wuxi, Jiangsu 214122, China
    3. School of Fashion, Wuhan Textile University, Wuhan, Hubei 430073, China
  • Received:2018-02-05 Revised:2018-09-30 Online:2019-01-15 Published:2019-01-18
  • Contact: ZHANG Tao E-mail:zhangtao820@tom.com

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Abstract:

In order to better develop and utilize the resources of dog hair, the influences of wet / heat treatment on the structure and properties of dog hair were studied. The dog hair were subjected to heat and wet treatment, respectively, then the fibers were tested by single fiber universal tester, Fourier transform infrared spectroscopy, X-ray diffraction, thermal analyzer, thermal insulation tester and scanning electron microscopy. The results show that the crimp ratio of dog hair decreases after wet treatment, while that of the fiber increases after heat treatment. Heat treatment has much heavier harm to the surface of that fiber than wet treatment, and the mechanical properties of the dog hair are significantly worse after heat treatment. The dog hair has the infrared characteristics of protein fiber, and both of the wet treatment and heat treatment have no obvious influence on its molecular structure, but the secondary structure is affected. The crystallization indexes of samples after wet treatment and heat treatment decrease from 56.87% of untreated sample to 46.21% and 45.92%, respectively, and the heat stability decreases. In addition, the hollow ratio of the wet treated dog hair is decreased obviously and the warm retention ratio is reduced accordingly. However, the hollow ratio of the fibers after heat treatment increases, and the warm retention ratio increases to 96.88%.

Key words: dog hair, wet/heat treatment, crimp ratio, warm retention ratio

CLC Number: 

  • TS102.3

Fig.1

Influence of heat treatment on crimp properties of dog hair. (a) Crimp ratios chiengora; (b) Break elongation"

Fig.2

Stress-strain curves of dog hair before and after wet/heat treatment"

Tab.1

Mechanical properties of chiengora fiber before and after wet / heat treatment"

处理方式 初始模量 断裂强度 断裂功
平均值/(cN·tex-1) CV值/% 平均值/(cN·tex-1) CV值/% 平均值/(cN·cm) CV值/%
未处理 203.79 18.91 18.55 2.16 6.08 25.44
湿处理 165.45 15.80 17.90 8.43 6.91 26.56
热处理 107.67 27.56 16.92 5.89 5.44 23.05

Fig.3

Infrared spectra of dog hair before and after wet/heat treatment"

Fig.4

XRD patterns of dog hair and after wet/heat treatment"

Tab.2

X ray diffraction indexes of dog hair before and after wet/heat treatment"

处理方式 I9/(°) I14/(°) C/%
未处理 422 182 56.87
湿处理 422 227 46.21
热处理 392 212 45.92

Fig.5

TG curves of dog hair before and after wet/heat treatment"

Tab.3

Thermal insulation and thermal conductivity of dog hair layers before and after wet/heat treatment"

处理方式 保暖率/% 导热系数/(W·m-1·℃-1)
未处理 83.75 0.047 6
湿处理 55.79 0.099 7
热处理 96.88 0.037 9

Fig.6

Cross section SEM images of dog hair before and after wet / heat treatment(×5 000)."

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