Preparation method of titanium dioxide modified polyamide fibers

A polyamide fiber and titanium dioxide technology, applied in the direction of single-component polyamide rayon, etc., can solve the problems that the dispersant affects the caprolactam polymerization process, cannot uniformly disperse titanium dioxide, and the dispersant is washed out, etc., to improve spinnability , Realize the effect of crafting and reducing energy consumption

Inactive Publication Date: 2018-02-02
HUIZHOU DHOMA IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing titanium dioxide modified polyamide fibers. The technical solution provided by the present invention solves the problem that the current preparation method of titanium dioxide modified polyamide fibers cannot uniformly disperse titanium dioxide and add a dispersant for in-situ polymerization. The method has the problem that the dispersant is washed out during the extraction process, and at the same time, the dispersant has the problem of affecting the polymerization process of caprolactam

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] (2) Preparation of titanium dioxide modified polyamide: add a certain amount of titanate to the caprolactam prepolymer obtained in step (1), under the condition of nitrogen protection, carry out polycondensation reaction at a certain temperature, polycondensation reaction produces The water can hydrolyze the titanate to form titanium dioxide, so as to realize the in-situ polymerization growth of titanium dioxide, so as to obtain a highly dispersed titanium dioxide-modified polyamide;

[0032] (3) Preparation of titanium dioxide-modified polyamide fibers: the titanium dioxide-modified polyamide fibers prepared in step (2) are used as raw materials, and after extraction, titanium dioxide-modified polyamide fibers are prepared by melt spinning.

[0033]In step (1), the catalyst is protonic acid and / or amino acid. Wherein, the protonic acid is one or more of HCl, H3PO4, H2SO4, HNO3, NH3, [Al(H2O)6]; the amino acid is an aliphatic amino acid or an aromatic amino acid. The m...

Embodiment 1

[0043] A kind of preparation method of titanium dioxide modified polyamide fiber comprises the following steps:

[0044] (1) Caprolactam hydrolysis ring opening

[0045] Under the action of water and a catalyst, the caprolactam undergoes a ring-opening reaction at a certain temperature and pressure for a period of time, and then the pressure is released to obtain a polyamide prepolymer.

[0046] The catalyst is HCl, and the addition amount is 0.01% relative to the mass fraction of caprolactam; the addition amount of the water is 0.1% relative to the mass fraction of caprolactam; the ring-opening reaction time is: 5h, and the reaction temperature is : 280°C, the reaction pressure is controlled at 0.4Mpa.

[0047] (2) Preparation of titanium dioxide modified polyamide

[0048] Adding a certain amount of titanate to the caprolactam prepolymer obtained in step (1), under the condition of nitrogen protection, carry out polycondensation reaction at a certain temperature, the water...

Embodiment 2

[0056] A kind of preparation method of titanium dioxide modified polyamide fiber comprises the following steps:

[0057] (1) Caprolactam hydrolysis ring opening

[0058] Under the action of water and a catalyst, the caprolactam undergoes a ring-opening reaction at a certain temperature and pressure for a period of time, and then the pressure is released to obtain a polyamide prepolymer.

[0059] The catalyst is H3PO4, and the addition amount is 1% relative to the mass fraction of caprolactam; the addition amount of the water is 5% relative to the mass fraction of caprolactam; the ring-opening reaction time is: 3h, and the reaction temperature is : 260°C, the reaction pressure is controlled at 0.3Mpa.

[0060] (2) Preparation of titanium dioxide modified polyamide

[0061] Adding a certain amount of titanate to the caprolactam prepolymer obtained in step (1), under the condition of nitrogen protection, carry out polycondensation reaction at a certain temperature, the water pr...

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PUM

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Abstract

The invention relates to the technical field of chemical fiber manufacturing, in particular to a method for preparing titanium dioxide-modified polyamide fibers. Caprolactam is used as a raw material, and a polyamide prepolymer is obtained after pressurized ring opening, and a certain amount of titanate is introduced into the system , continue the reaction under the condition of nitrogen protection, the water produced by the polycondensation reaction of the polyamide prepolymer reacts with the titanate, so that the titanate is slowly hydrolyzed to form titanium dioxide. Adopting the preparation method of titanium dioxide modified polyamide fiber provided by the present invention solves the problem that the current preparation method of titanium dioxide modified polyamide fiber cannot uniformly disperse titanium dioxide, and the method of adding a dispersant to in-situ polymerization has the problem that the dispersant is washed out during the extraction process At the same time, the dispersant has the problem of affecting the polymerization process of caprolactam.

Description

technical field [0001] The invention relates to the technical field of manufacturing chemical fibers, in particular to a method for preparing titanium dioxide-modified polyamide fibers. Background technique [0002] Due to its outstanding advantages in chemical stability, thermal properties, and mechanical properties, polyamide fiber is the second largest variety in the chemical fiber industry and is widely used in various fields such as clothing, industry, and carpets. Products made of nylon fiber have good elasticity, high strength, wear resistance, durability, small specific gravity, and are not easy to be eaten by insects. They have always been loved by consumers, especially in outdoor clothing, which has a stable market. With the improvement of living standards, people put forward higher requirements on the style and function of fibers, so the development of modified polyamide fibers has become a hot spot, and the research on titanium dioxide modified polyamide fibers i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/90D01F1/10C08G69/16
CPCD01F6/90C08G69/16D01F1/10
Inventor 侯忠王水棚陈友乾
Owner HUIZHOU DHOMA IND CO LTD
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