Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (05): 136-142.doi: 10.13475/j.fzxb.20210204807

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Application of cutinase in polyester surface modification

WANG Yanping1, CHEN Xiaoqian2, XIA Wei2, FU Jiajia1(), GAO Weidong1, WANG Hongbo1, ARTUR Cavaco-Paulo3   

  1. 1. Jiangsu Engineering Technology Research Center of Function Textiles, Jiangnan University, Wuxi, Jiangsu 214122, China
    2. State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
    3. Centre of Biological Engineering, University of Minho, Braga 4710-057, Portugal
  • Received:2021-02-22 Revised:2021-08-10 Online:2022-05-15 Published:2022-05-30
  • Contact: FU Jiajia E-mail:kathyfjj@126.com

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Abstract:

Polyester fabrics present poor hydrophilic property. This research uses cutinase from H.insolens to modify the surface of polyester fabrics. The UV absorbance of the residual reaction liquid was evaluated and the treatment condition was determined based on the single-factor test. A suitable treatment condition for polyester fabrics was achieved under the cutinase concentration of 100 U/mL at 60 ℃ and pH 8.5 for 72 h. Under these conditions, Trition X-100 surfactant, with a dosage of 0.1%, was added to the reaction system, leading to significantly increase in the yield of cutinase-catalyzed hydrolysis of polyester fabrics. The type of product in the reaction residue, the hydrophilicity and dyeing properties of the treated and untreated fabric were measured, and the surface morphology and surface chemical composition of polyester were characterized. The mechanism of enzymatic modification of polyester was proposed. The results show that two main products yield from cutinase hydrolysis of polyester, namely mono-terephthalic acid 2-hydroxyethyl ester (MHET) and terephthalic acid (TPA). The surface of the polyester fabric became rough and the contact angle of polyester fabric was reduced from 93.4° to 83.1°. The dyeing depth value of the methylene blue dyed polyester fabric was significantly increased after the cutinase treatment, and the strength of C=O and C—O bands in the infrared spectrum corresponding to ester bond of cutinase-treated polyester fabric was decreased. It is indicated that the cutinase is able to catalyze the hydrolysis of ester bond on the surface of the polyester fabric, thus effectively improving the hydrophilicity of the polyester fabric.

Key words: cutinase, polyester fabric, hydrolysis, terephthalic acid, wettability, surface modification

CLC Number: 

  • TS156

Fig.1

Standard curve of TPA concentration and absorbance"

Fig.2

Influence of cutinase dosage on release of TPA and its derivatives"

Fig.3

Influence of reaction time on release of TPA and its derivatives"

Fig.4

Influence of pH on release of TPA and its derivatives"

Fig.5

Influence of reaction temperature on release of TPA and its derivatives"

Fig.6

High performance liquid chromatography diagram of residual reaction liquid from enzymatic treatment of polyester fabric"

Fig.7

SEM images of polyester before (a) and after (b) cutinase treatment"

Fig.8

Infrared spectrum of polyester fabric before and after cutinase treatment"

Fig.9

K/S curve of polyester fabric before and after cutinase treatment"

Fig.10

Change of contact angle of polyester fabric before (a) and after (b) cutinase treatment"

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