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Degradable polyester fiber and preparation method thereof

A technology of polyester fiber and modified polyester, applied in the field of polyester fiber, can solve the problems of inability to solve the degradation and recycling of waste clothing, slow degradation rate, poor degradation effect, etc., so as to improve the natural degradation performance, increase the degradation rate, The effect of increasing the free volume of a void

Active Publication Date: 2019-05-07
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical degradation method currently used still has problems such as slow degradation rate and poor degradation effect, and it still cannot solve the degradation and recycling of a large number of waste clothing.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Degradable polyester fiber and preparation method thereof
  • Degradable polyester fiber and preparation method thereof
  • Degradable polyester fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A kind of preparation method of degradable polyester fiber, the steps are as follows:

[0065] (1) prepare modified polyester;

[0066] (1.1) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0067] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1:1:1.2:2.0, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0068] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0069] (1.2) Preparation of doped modified ZrO 2 Powder;

[0070] (a) Mg(NO 3 ) 2 Aqueous s...

Embodiment 2

[0087] A kind of preparation method of degradable polyester fiber, the steps are as follows:

[0088] (1) prepare modified polyester;

[0089] (1.1) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0090] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.1:1:1.2:2.3, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0091] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 45°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0092] (1.2) Preparation of doped modified ZrO 2 Powder;

[0093] (a) LiNO with a concentra...

Embodiment 3

[0105] A kind of preparation method of degradable polyester fiber, the steps are as follows:

[0106] (1) prepare modified polyester;

[0107] (1.1) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0108] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.2:1:1.25:2.0, and place in an ice bath Under the conditions of reaction for 3 hours, after the reaction is completed, cooling and crystallization, centrifugation, washing, refining and drying are carried out to obtain octyne diol;

[0109] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 3:10:0.03, react at 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0110] (1.2) Preparation of doped modified ZrO 2 Powder;

[0111] (a) Zn(NO 3 ) 2 ...

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Abstract

The invention relates to a degradable polyester fiber and a preparation method thereof. The preparation method comprises the steps that modified polyester FDY filament is prepared from modified polyester melt according to an FDY process, and the degradable polyester fiber is obtained; the molecular chain of the modified polyester comprises a terephthalic acid chain segment, an ethylene glycol chain segment, a 2,5,6,6-tetramethyl-2,5-heptanediol chain segment and a fluorine-containing dicarboxylic acid chain segment; fluorine-containing dicarboxylic acid is 2,2-difluoro-1,3-malonic acid or 2,2-difluoro-1,4-succinic acid or 2,2-difluoro-1,5-glutaric acid or 2,2,3,3-tetrafluoro-1,4-succinic acid; modified ZrO2 doped powder is dispersed in modified polyester. After the obtained product is placed for 60 months on the conditions that the temperature is 25 DEG C, and the relative humidity is 65%, the intrinsic viscosity is lowered by 23-28%. The preparation method is low in cost and simple inprocess; the prepared product is high in natural degradation rate, and has great application prospects.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a degradable polyester fiber and a preparation method thereof. Background technique [0002] The advent of chemical fibers began with the development of organic synthetic chemistry and polymer chemistry in the 1920s. In just a few decades, it has become the backbone of the industry, and its output and application far exceed natural fibers. Among them, polyester, nylon, and acrylic are the three major fibers in chemical fibers. Among these three fibers, polyester has the fastest development speed, the most widely used, and the highest output. It has become the crown of chemical fibers and is one of the most important textile materials today. one. [0003] Polyester fiber is the largest variety of synthetic fiber, it is based on purified terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG) as raw materials through esterification or transesterific...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/682C08G63/86
CPCD01F1/10D01F6/84C08G63/6826C08G63/183C08K9/02C08K2003/2244C08L67/02C08G63/866D01F6/92
Inventor 张元华丁竹君王丽丽
Owner JIANGSU HENGLI CHEM FIBER
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