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A kind of polyester dyeing method utilizing nano lanthanum oxide

A technology of nano-lanthanum oxide and dyeing method, which is applied in the field of polyester dyeing using nano-lanthanum oxide, which can solve the problems of poor hydrophilicity and unfavorable dyeing of polyester, and achieve the effects of lower glass transition temperature, low cost, and mild reaction conditions

Inactive Publication Date: 2019-05-17
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, due to the poor hydrophilicity of polyester, which is not conducive to dyeing, people are now paying more attention to the surface modification of polyester.

Method used

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  • A kind of polyester dyeing method utilizing nano lanthanum oxide
  • A kind of polyester dyeing method utilizing nano lanthanum oxide
  • A kind of polyester dyeing method utilizing nano lanthanum oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Step 1, surface modification of nano lanthanum oxide spheres

[0054] Add 94.1g of absolute ethanol and 5g of stearic acid into the flask, weigh 0.9g of nano-lanthanum oxide, add it into the flask, ultrasonically oscillate at room temperature and stir for 25min at the same time; take out the flask, place it in an oil bath at 75°C, and reflux at a constant temperature for 5.5 After h, use a Buchner funnel to carry out suction filtration, then wash with absolute ethanol, and finally put it into a vacuum drying oven and dry it at 75°C for 23 hours to obtain surface-modified lanthanum oxide;

[0055] Step 2, alkali treatment of polyester

[0056] Weigh 2g of polyester, put it in a sodium hydroxide solution with a concentration of 45g / L, the bath ratio is 1:45, and react at a constant temperature of 93°C for 3.5h. After the reaction is completed, wash it with distilled water until it is neutral, and dry it at 75°C;

[0057] Step 3, coupling the surface-modified lanthanum ox...

Embodiment 2

[0065] Step 1, surface modification of nano lanthanum oxide spheres

[0066] Add 91.9g of absolute ethanol and 7g of stearic acid into the flask, weigh 1.1g of nano-lanthanum oxide, add it into the flask, ultrasonically oscillate at room temperature and stir for 35min at the same time; take out the flask, place it in an oil bath at 85°C, and reflux at a constant temperature for 6.5 After h, use a Buchner funnel to carry out suction filtration, then wash with absolute ethanol, and finally put it into a vacuum drying oven and dry it at 85°C for 25 hours to obtain surface-modified lanthanum oxide;

[0067] Step 2, alkali treatment of polyester

[0068] Weigh 2g of polyester, put it in a sodium hydroxide solution with a concentration of 55g / L, the bath ratio is 1:55, and react at a constant temperature at 97°C for 4.5h. After the reaction is completed, wash it with distilled water until neutral, and dry it at 85°C;

[0069] Step 3, coupling the surface-modified lanthanum oxide ob...

Embodiment 3

[0077] Step 1, surface modification of nano lanthanum oxide spheres

[0078] Add 93g of absolute ethanol and 6g of stearic acid into the flask, weigh 1g of nano-lanthanum oxide, add it into the flask, ultrasonically oscillate at room temperature and stir for 30min at the same time; take out the flask, place it in an oil bath at 80°C, and reflux at a constant temperature for 6h. Use a Buchner funnel to perform suction filtration, then wash with absolute ethanol, and finally put it into a vacuum drying oven at 80°C for 24 hours to obtain surface-modified lanthanum oxide;

[0079] Step 2, alkali treatment of polyester

[0080] Weigh 2g of polyester, put it in a sodium hydroxide solution with a concentration of 50g / L, the bath ratio is 1:50, and react at a constant temperature at 95°C for 4h. After the reaction is completed, wash it with distilled water until it is neutral, and dry it at 80°C;

[0081] Step 3, coupling the surface-modified lanthanum oxide obtained in step 1 with ...

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Abstract

The invention discloses a nanometer lanthanum oxide-used polyester dyeing method which comprises the following steps: firstly performing surface modification on nanometer lanthanum oxide particles, performing alkali treatment on polyester, performing coupling reaction on the surface-modified nanometer lanthanum oxide and the polyester subjected to the alkali treatment through a silane coupling agent, and finally, dyeing the coupled polyester through a carrier method. After lanthanum oxide is subjected to stearic acid esterification surface modification, the affinity between a carrier and a dispersion dye as well as between the carrier and polyester fiber can be iimproved, so that the glass-transition temperature of the polyester can be reduced; therefore, after the stearic acid surface-modified lanthanum oxide is coupled to the surface of the polyester, the dispersion rate of the carrier and the dispersion rate is increased, so that the carrier and the dispersion dye can enter the polyester fiber in the form of a single molecule, and the dyeing rate and the dye uptake rate of a scattered dye are increased; furthermore, the reaction temperature is relatively low, and dyeing of blended polyester is facilitated.

Description

technical field [0001] The invention belongs to the technical field of fabric dyeing methods, and relates to a polyester dyeing method using nanometer lanthanum oxide. Background technique [0002] The basic structural unit of polyester fiber is polyethylene terephthalate, the molecular weight of polyester is generally around 20,000, and it contains 1%-3% of impurities. Its chemical structural formula is: [0003] [0004] The square brackets in the formula are the basic chain links of polyester macromolecules, and n is the average degree of polymerization, which is about 130. The macromolecular chain of polyester fiber has two conformational forms of folded chain and extended chain. From the molecular composition of polyester fiber, it is composed of short aliphatic hydrocarbon chains, ester groups, benzene rings and terminal hydroxyl groups. Therefore, except for the presence of two terminal hydroxyl groups, polyester fiber has no other polar groups, so polyester fiber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/45D06M11/38D06P1/16D06P1/62D06P1/651D06P1/653D06P3/54D06M101/32
CPCD06M11/38D06M11/45D06P1/16D06P1/625D06P1/65125D06P1/6533D06P3/54
Inventor 李红朱文庆李莉
Owner XI'AN POLYTECHNIC UNIVERSITY
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