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Degradable polyester fiber and its preparation method

A technology of polyester fiber and modified polyester, which is applied in the field of polyester fiber, can solve the problems of inability to degrade and recycle waste clothing, poor degradation effect, and slow degradation rate, so as to improve natural degradation performance, increase degradation rate, The effect of increasing the free volume of voids

Active Publication Date: 2020-10-16
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 its preparation method
  • Degradable polyester fiber and its preparation method
  • Degradable polyester fiber and its preparation method

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 in 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 is as follows: a modified polyester FDY filament is prepared from a modified polyester melt according to an FDY process, and a degradable polyester fiber is obtained; the modified polyester The molecular chain of the ester includes a terephthalic acid segment, an ethylene glycol segment, a 2,5,6,6-tetramethyl-2,5-heptanediol segment and a fluorine-containing dibasic acid segment; The dibasic acid is 2,2-difluoro-1,3-malonic acid, 2,2-difluoro-1,4-succinic acid, 2,2-difluoro-1,5-glutaric acid or 2 ,2,3,3‑tetrafluoro‑1,4‑succinic acid; doped modified ZrO dispersed in modified polyester 2 Powder. After the prepared product is placed for 60 months under the condition of 25°C and 65% relative humidity, its intrinsic viscosity decreases by 23-28%. The preparation method of the invention has low cost and simple process; the obtained product has a fast 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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Patent Type & Authority Patents(China)
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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