Method for modifying polyester based on Humicola insolens cutinase

A technology of cutinase and polyester, which is applied in the direction of enzyme/microbial biochemical treatment, biochemical fiber treatment, fiber type, etc., can solve the problems of polyester fiber weight and strength loss, low yield of hydrolyzate, poor hydrophilic modification effect, etc. , achieve the effects of mild action, high selectivity and improved catalytic efficiency

Inactive Publication Date: 2021-09-03
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The use of strong alkali modification has the problems of serious loss of polyester fiber weight and strength, and environmental pollution; the use of chemical modification is easy to pollute the environment and endanger human health; the use of biological enzyme modification may cause low yield of hydrolyzed products and poor hydrophilic modification effect The problem

Method used

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  • Method for modifying polyester based on Humicola insolens cutinase
  • Method for modifying polyester based on Humicola insolens cutinase
  • Method for modifying polyester based on Humicola insolens cutinase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A method for modifying polyester based on Humicola insolens cutinase, comprising the steps of:

[0059] (1) Refined fabric of polyester fabric

[0060] Put the polyester fabric in a solution of 5g / L soap flakes and 4g / L sodium carbonate, and treat it at 98°C for 30 minutes for desizing and scouring (bath ratio 1:30); then wash it with water, and dry it in an oven at 105°C ; Finally, place the polyester fabric in a constant temperature and humidity box (21 ± 1 ° C, 65 ± 2%) to balance for at least 24 hours to obtain a refined polyester fabric for use;

[0061] (2) Modification treatment:

[0062] Cut the refined polyester fabric into discs, each weighing 0.4g, put them into the Humicola insolens cutinase solution at a bath ratio of 1:40, and react at pH 8.5 and 60°C for 72 hours. Ultrasonic cleaning with 1% SDS solution for 30 minutes, then ultrasonic cleaning with 20% ethanol solution for 30 minutes, then drying in an oven at 105°C, and finally placing the dried polye...

Embodiment 2

[0071] Adjust the reaction time of step (2) of Example 1 to 6, 24, 48, 72, 96, and 120 h, omit the addition of Trition X-100, and keep the others consistent with Example 1 to obtain a hydrophilic modified polyester fabric.

[0072] The obtained hydrophilic modified polyester fabric is subjected to a performance test, and the test results are as follows:

[0073] The test result of table 2 embodiment 2

[0074]

[0075] As can be seen from Table 2: in the initial stage of the reaction, as time goes on, the amount of TPA and its derivatives generated in the reaction raffinate increases rapidly. It has been reported that lipase from Pichia pastoris was used to treat polyester fabrics, and the product production reached saturation at 12.5 mg / L in 7 hours (GAO Aiqin. Hydrophilic modification of polyester fabric by synergetic effect of biological enzymolysis and non-ionic surfactant, and applications in cleaner production[J].Journal of Cleaner Production,2017(164):277-287.), and...

Embodiment 3

[0077] Adjust the reaction pH of step (2) of Example 1 to 7.5, 8, 8.5, 9, and the reaction time to 48h, omit the addition of Trition X-100, and keep the others consistent with Example 1 to obtain a hydrophilic modified polyester fabric.

[0078] The obtained hydrophilic modified polyester fabric is subjected to a performance test, and the test results are as follows:

[0079] The test result of table 3 embodiment 3

[0080]

[0081] It can be seen from Table 3 that as the pH value of the reaction solution increases, the amount of the product generated in the reaction residue shows a trend of first increasing and then decreasing. When the pH value was 8.5, the amount of product generated in the reaction raffinate reached the maximum. The pH value of the reaction system will affect the dissociation degree of the active center group of the enzyme, and also affect the binding and catalysis of the enzyme molecule and the substrate, so the catalytic activity of the enzyme will c...

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Abstract

The invention discloses a method for modifying polyester based on Humicola insolens cutinase, and belongs to the technical field of terylene surface modification. The method provided by the invention comprises the following steps of putting a refined polyester fabric into a Humicolainsolens cutinase solution, reacting at 45-65 DEG C for 48-72 hours, washing, and drying to obtain a hydrophilic modified polyester fabric, wherein the Humicola insolens cutinase solution is prepared from Humicola insolens cutinase, a Tris-HCl buffer solution and a non-ionic surface active agent; and the concentration of the Humicola insolens cutinase is 20 to 120 U/mL, and the concentration of the non-ionic surface active agent is 0.5 to 2 g/L. According to the method, the adopted Humicola insolens cutinase can catalyze hydrolysis of ester bonds on the surface of the polyester to generate hydrophilic groups, namely hydroxyl and carboxyl, and meanwhile, hydrolysis products are generated; the main hydrolysis products are terephthalic acid (TPA) and mono (2-hydroxyethyl terephthalate) (MHET), and the hydrophilic modification effect is achieved on the basis that the advantages and properties of the polyester are kept unchanged.

Description

technical field [0001] The invention relates to a method for modifying polyester based on Humicola insolens cutinase, which belongs to the technical field of polyester surface modification. Background technique [0002] Polyester has many excellent properties, such as high strength, soft touch, stretch resistance, wrinkle resistance and wear resistance, machine washable and so on. But on the other hand, polyester also has many shortcomings. For example, considering the comfort of wearing, polyester fabrics are thicker, poor in air permeability, poor in water absorption, low in moisture regain, prone to static electricity and dull in wearing; from an aesthetic point of view, polyester fabrics are easy to pilling, poor in oil stain resistance, Bright light; From the perspective of functional finishing, polyester fabrics have poor dyeing performance, low dye uptake, and easy to appear lakes during the dyeing process. These characteristics of polyester fiber are determined by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M16/00D06M15/53D06M101/32
CPCD06M16/003D06M15/53D06M2101/32
Inventor 傅佳佳王艳萍罗子杰韩瑞娟王鸿博高卫东
Owner JIANGNAN UNIV
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