Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (02): 130-134.doi: 10.13475/j.fzxb.20181100905

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Functional finishing of dopamine modified silk fabric with ferric chloride

GUAN Jinping(), KUANG Xiaohui, TANG Rencheng, CHEN Guoqiang   

  1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215006, China
  • Received:2018-11-01 Revised:2018-12-05 Online:2019-02-15 Published:2019-02-01

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Abstract:

In order to endow silk fabric with multifunction, the bio-based dopamine was used to modify silk fabric, and functional groups such as amino group and phenolic hydroxyl group were introduced on the surface of the fabric, and then, the modified fabric was immersion treated with ferric chloride. The properties of the finished fabric were characterized by spectrophotometer, scanning electron microscope, oxygen index meter and micro-combustion calorimeter. The laundering durability to washing of the finished silk fabric was discussed. The results show that the polydopamine-modified silk fabric could improve its char formation and successfully chelate the iron ions. After being treated with ferric chloride, the oxygen index of dopamine modified silk fabric increass to 29.1%, and its heat release capacity and the total heat release are reduced to 40 J/(g·K) and 2.3 kJ/g, respectively. The finished fabric has certain UV shielding properties, and the oxygen index of the fabric after washing is still 28.2%.

Key words: silk fabric, dopamine, ferric chloride, functional finishing, flame retardant finishing, anti-UV

CLC Number: 

  • TS190.6

Fig.1

Color characteristics of fabric"

Tab.1

Color parameters of fabrics"

样品 L* a* b* C* H
Silk 94.80 -0.60 2.87 2.94 101.77
PDA-Silk 28.13 3.90 10.13 10.85 68.91
FeCl3-PDA-Silk 32.73 9.43 17.74 20.09 62.01

Fig.2

SEM images of silk fabric (×5 000). (a) Silk:(b) PDA-Silk; (c) FeCl3-PDA-Silk; (d) Washed FeCl3-PDA-Silk"

Fig.3

Energy spectrum of FeCl3-PDA-Silk"

Tab.2

Micro-combustion data of silk fabrics"

样品 HRC/
(J·(g·K)-1)		 PHRR/
(W·g-1)		 THR/
(kJ·g-1)		 T/℃
Silk 146.0 132.8 8.6 310.4
PDA-Silk 132.0 130.0 8.7 313.1
FeCl3-PDA-Silk 40 38.5 2.3 297.7

Fig.4

Heat release rate of silk fabric"

Tab.3

LOI, damage length, afterflame time and afterglow time of silk fabrics"

样品 极限氧
指数/%		 损毁长
度/cm		 续燃时
间/s		 阴燃时
间/s
Silk 23.7 烧尽 0 0
PDA-Silk 23.9 烧尽 0 0
FeCl3-PDA-Silk 29.1 11 0 15.7

Fig.5

Vertical burning pictures of silk fabrics"

Fig.6

UV transmittance of silk fabrics"

Tab.4

UV data of silk fabrics"

样品 UPF TUVA/% TUVB/%
Silk 2.77 51.83 27.91
PDA-Silk 13.84 7.83 7.12
FeCl3-PDA-Silk 10.79 9.29 9.27

Fig.7

Energy spectrum of FeCl3-PDA-Silk after washing"

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