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Application of modified PET (Polyethylene Terephthalate) polyester

A modified polyester technology, which is applied in the field of modified polyester, can solve the problems of high specific surface area, low dielectric constant, and the toxic price of tetraethyl orthosilicate, so as to reduce radiation heat transfer, reduce heat conduction, shorten The effect of the replacement cycle

Active Publication Date: 2018-08-17
天津朗华科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when directly mixing airgel powder and polymer resin, there will be problems of uneven mixing, and the problem of lower tensile strength will occur in subsequent spinning, and it is easy to break and fluff. Usually only thicker fibers can be produced. Limits large-scale application
[0007] The Chinese invention patent application with the publication number CN102557577A provides a preparation and method of a silica airgel composite material, using tetraethyl orthosilicate as a silicon source, and industrially produced glass fiber or fiber cotton material as a reinforcement. The prepared silica airgel composite has the characteristics of high porosity, high specific surface area, low density, low dielectric constant and low thermal conductivity, and has good formability, but tetraethyl orthosilicate is toxic and expensive , silicon alkoxide is suitable for industrial production as a silicon source

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The preparation method of silicon airgel precursor is:

[0059] (1) Prepare a mixed solution of silicon source and solvent

[0060] Take a water glass with a molar number of 3.0 and put it into a reaction kettle, dilute it with 2.5 times the mass of deionized water, stir at 180 rpm for 30 minutes, and filter through a 200-mesh sieve to obtain a water glass solution.

[0061] (2) Sol

[0062] Get 8mol / L sulfuric acid, add zirconium sulfate salt (zirconium sulfate salt is counted as its zirconia, and the mol ratio with the silicon oxide of water glass solution is 5:100), yttrium sulfate salt (yttrium sulfate salt is counted as its yttrium oxide, and The molar ratio of aluminum oxide is 1:100); After mixing evenly, spray and add to the water glass solution that step (1) obtains, carry out rapid stirring with the speed of 1300 rev / min while spraying, when controlling pH value to 1.5 Stop spraying, and the spraying time is controlled at 100 minutes; Obtain sol.

[0063] (...

Embodiment 2

[0074] The preparation method of silicon airgel precursor is:

[0075] (1) Prepare a mixed solution of silicon source and solvent

[0076] Take a water glass with a molar number of 3.2 and put it into a reaction kettle, dilute it with deionized water of 3 times the mass, stir at 200 rpm for 30 minutes, and filter through a 200-mesh sieve to obtain a water glass solution.

[0077] (2) Sol

[0078] Get 10mol / L nitric acid, add aluminum hydrochloride (aluminum hydrochloride is calculated in alumina, and the mol ratio of aluminum oxide and silicon oxide in the water glass solution is 2:100), lanthanum hydrochloride (lanthanum hydrochloride is calculated in lanthanum oxide, and The molar ratio of aluminum oxide is 3:100); After mixing evenly, spray and add to the water glass solution that step (1) obtains, carry out rapid stirring with the speed of 1200 rpm while spraying, control the pH value till 2.5 , the spraying time is controlled at 100 minutes; the sol is obtained.

[0079]...

Embodiment 3

[0090] The preparation method of silicon airgel precursor is:

[0091] (1) Prepare a mixed solution of silicon source and solvent

[0092] Take water glass with a molar number of 4.0 and put it into a reaction kettle, dilute it with 3 times the mass of deionized water, stir at 80 rpm for 30 minutes, and filter through a 200-mesh sieve to obtain a water glass solution.

[0093] (2) Sol

[0094] Get 15mol / L nitric acid, add aluminum oxalate salt (in terms of aluminum oxide, the mol ratio with silicon oxide in the water glass solution is 3:100), lanthanum oxalate salt (in terms of lanthanum oxide, the mol ratio with aluminum oxide is 6: 100); after mixing evenly, spray and join the water glass solution that step (1) obtains, carry out rapid stirring with the speed of 1800 rev / mins while spraying, control pH value till 2.5, spray time is controlled at 100 minutes ; Get the sol.

[0095] (3) Gel

[0096] Add the sodium hydroxide solution with a pH value of 11.5 to the sol obtai...

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Abstract

The invention relates to application of modified PET (Polyethylene Terephthalate) polyester and belongs to the field of modified polyester. The modified PET polyester comprises aerogel particles and polyethylene terephthalate; the aerogel particles are uniformly dispersed among molecular chains of the polyethylene terephthalate; the size of the aerogel particles is 2-3 microns; and the content ofthe aerogel particles in the modified PET polyester is 1-10wt%. The modified PET polyester is prepared by the following steps of adding aerosol powder in ethylene glycol, putting a mixture in a grinder for grinding to prepare a mixed slurry, mixing the mixed slurry with terephthalic acid, and performing esterification reaction and polymerization reaction on a mixture to prepare modified PET; and performing slicing, metering, silk spurting, cooling, oil application, stretching, heat setting and winding formation to prepare modified PET fibers. By introducing the aerogel particles before polymerization of PET polyester, the prepared modified PET is good in spinnability, can be used for producing the modified PET fibers with various thicknesses so as to be wide in application range and can meet the production demands for various fabrics.

Description

[0001] This application is a divisional application of a Chinese invention patent with the patent application number 201710509719.1 (application date: June 28, 2017, patent name: a modified PET polyester and its preparation method and application). technical field [0002] The invention belongs to the field of modified polyester, and in particular relates to an application of airgel modified PET polyester. Background technique [0003] Polyester (PET fiber) is the world's largest and most widely used synthetic fiber variety, and polyester accounts for more than 60% of the world's synthetic fiber production. It is widely used in textiles such as clothing, bedding, various decorative fabrics, special fabrics for national defense and other industrial fiber products, such as filter materials, insulating materials, tire cords, conveyor belts, etc. With the sustained and rapid growth of the domestic economy and the continuous improvement of the consumption capacity of domestic res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08K9/10C08K3/36C01B33/158D01F6/92D01F1/10D01F1/07
CPCC01B33/158C08G63/183C08G63/78C08K3/36C08K9/10C08K2201/011D01F1/07D01F1/10D01F6/92
Inventor 郑善
Owner 天津朗华科技发展有限公司
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