Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (07): 24-30.doi: 10.13475/j.fzxb.20180607107

• Fiber Materials • Previous Articles     Next Articles

Cationization of Bombyx mori silk fibroin and effect there of on wool traits

BAO Hong1,2, XU Shui1,2, ZHANG Xiaoning1,2, CHENG Guotao1,2, ZHU Yong1,2()   

  1. 1. State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China
    2. College of Biotechnology, Southwest University, Chongqing 400715, China
  • Received:2018-06-25 Revised:2019-03-30 Online:2019-07-15 Published:2019-07-25
  • Contact: ZHU Yong E-mail:zhuy@swu.edu.cn

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Abstract:

In order to improve the wearing comfort of wool fabrics, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) was used as an activator to activate carboxyl group on the silk fibroin side chain to react with spermine. The cationized silk fibroin was then arranged on the finished wool fiber. The finished wool was characterized by scanning electron microscopy, X-ray diffraction, Fourier infrared spectroscopy and differential scanning calorimetry analysis. The results show that Zeta potential of silk fibroin rises from -3.58 mV to 5.41 mV, and the modified wool fiber scale layer is coated by a silk fibroin film. The wool fiber possesses more hydrogen bonds and amide bonds, and the crystal structure of wool fiber is more stable. The heat-resistant decomposition performance of the cationized silk fibroin treated wool fibers is improved, but the mechanical properties are decreased. However, no significant difference exists in wool fiber structure with different silk fibroin solution modification. Wool fibers have a reduced dye uptake ratio for acid dyes.

Key words: Bombyx mori silk fibroin, spermine, wool modification, crystallization property

CLC Number: 

  • Q518.4

Fig.1

Zeta potentials silk fibroin solutions modified with different mass fractions of spermine"

Tab.1

Amino acid contents in silk fibroin solution modified with different mass fractions of spermine"

氨基酸名称 精胺质量分数/%
0.0 0.1 2.0 5.0 10.0
丝氨酸 14.9 14.6 14.2 14.8 14.6
苏氨酸 1.2 1.2 1.2 1.2 1.3
甘氨酸 30.0 35.5 32.8 33.9 32.0
丙氨酸 29.5 28.7 31.9 30.6 32.5
缬氨酸 2.8 2.6 2.6 2.6 2.4
亮氨酸 0.6 0.7 0.6 0.7 0.6
酪氨酸 12.2 9.8 9.9 9.5 9.7
赖氨酸 0.5 0.6 0.5 0.6 0.5
组氨酸 0.4 0.5 0.5 0.5 0.4
精氨酸 0.5 0.5 0.5 0.5 0.5
天冬氨酸 2.2 2.6 2.2 2.6 2.1
异亮氨酸 0.7 0.8 0.8 0.8 0.7
苯丙氨酸 1.3 1.3 1.3 1.3 1.3

Fig.2

FT-IR spectra of modified silk fibroin solution"

Fig.3

SEM images of wool (a) and cationized silk fibroin finished wool(b)"

Fig.4

XRD pattern of wool modified by silk fibroin protein of silkworm with different concentrations of spermine"

Fig.5

Infrared spectrum of wool modified by silk fibroin protein of silkworm with different concentration of spermine"

Fig.6

DSC curves of wool modified by silk fibroin protein of silkworm with different concentrations of spermine"

Tab.2

Mechanical properties of wool modified by silk fibroin protein of silkworm with different concentrations of spermine"

精胺质量分数/% 断裂强力/cN 断裂伸长率/%
0.1 5.2 53.7
2.0 5.1 39.1
5.0 5.1 47.1
10.0 3.8 56.3
0.0 3.4 36.0
原羊毛 5.3 61.2

Fig.7

SEM images of wool (a), pure silk fibroin finished wool (b) and cationized silk fibroin finished wool (c) after dyeing"

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