Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (11): 119-124.doi: 10.13475/j.fzxb.20180807107

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation of oxidized chitosan/sericin composite and its functional finish on cotton fabrics

WANG Hao(), DU Zhaofang, XU Yunhui   

  1. College of Light-Textile Engineering and Art, Anhui Agricultural University, Hefei, Anhui 230036, China
  • Received:2018-08-31 Revised:2019-08-23 Online:2019-11-15 Published:2019-11-26

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Abstract:

In order to develop high quality cotton product, the oxidized chitosan/sericin composite was prepared by covalent binding of oxidized chitosan and sericin, and then applied to functional finish of cotton fabrics. The influences of various factors on the weighting percentage of cotton fabrics were analyzed and the optimized process parameters were obtained. The composite and its finished cotton fabrics were characterized by Fourier transform infrared spectroscopy, scanning electron microscope analysis. The results show that the active aldehyde group is introduced into chitosan after chitosan is oxidized with sodium periodate, subsequently the oxidized chitosan is subjected to a Schiff base reaction with sericin to prepare the composite finishing agent. When the composite is applied to the finishing of cotton fabrics, it can be chemically bonded to cotton fibers and cross-linked to form the thin film on the surface. With the increase of the oxidation degree of chitosan, the sericin loss rate of the composite decreases significantly. The breaking strength and moisture absorption of the modified cotton fabrics with oxidized chitosan/sericin composite show little change, whereas the properties of the wrinkle recovery, ultraviolet resistance and bacterial resistance of the modified fabrics are significantly improved. The weighting percentage of the cotton fabrics is stabilized at about 4% after 3 washing cycles, indicating that modified cotton fabrics have good washing fastness.

Key words: cotton fabric, functional finish, sodium periodate, oxidized chitosan, sericin

CLC Number: 

  • TS195.5

Fig.1

Schematic diagram of reaction between oxidized chitosan and sericin"

Fig.2

Infrared spectrum variation of different samples"

Fig.3

Effect of oxidation time on oxidation degree of chitosan and dissolution rate of sericin in composite"

Fig.4

SEM images of modified cotton fibers(×3 000) (a)Original cotton fiber;(b)Sericin modified cotton fiber;(c)Composite modified cotton fiber"

Fig.5

XPS spectrum of cotton fabric before and after composite modification"

Fig.6

Effect of chitosan oxidation time on weighting percentage of cotton fabric"

Tab.1

Effect of molar ratio of composite on weighting percentage of cotton fabric"

n(SS):n(OCS) 3:1 2:1 1:1 1:2 1:3
质量增加率/% 3.39 4.78 8.62 8.48 7.72

Fig.7

Effect of composite mass fraction on weighting percentage of cotton fabric"

Fig.8

Effect of composite treatment time on weighting percentage of cotton fabric"

Tab.2

Performance of cotton fabric before and after composite modification"

样品 断裂强力/N 毛细效应(30 min)/cm UPF值 折皱回复角/(°) 抑菌率/%
金黄色
葡萄球菌		 大肠
杆菌
原棉织物 286.3 8.53 8.83 135.4 — —
复合物改
性棉织物		 269.4 9.02 21.07 189.5 96.4 95.5

Tab.3

Effect of washing times on weighting percentage of fabrics"

洗涤次数 0 1 2 3 4 5
质量增加率/% 8.57 5.33 4.45 4.18 4.15 4.08
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