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Method for preparing ultrafine fiber polyurethane synthetic leather by carbon nanotubes grafted with modified nano-titanium dioxide on surfaces.

A technology of nano-titanium dioxide and carbon nanotubes, which is applied in the field of synthetic leather, can solve the problems of waterproof, antibacterial, antistatic, and insufficient friction resistance, and achieve the effects of enhanced mechanical properties, improved mechanical strength, and improved wear resistance

Inactive Publication Date: 2018-11-30
孙桂芝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are insufficient waterproof, antibacterial, antistatic, and friction resistance properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing superfine fiber polyurethane synthetic leather with modified nano-titanium dioxide-surface grafted carbon nanotubes, is characterized in that it comprises the steps:

[0031] (1) Dispersion of nano titanium dioxide:

[0032] Add 0.06 parts of dispersant sodium hexametaphosphate and 30 parts of deionized water to 2 parts of anatase-type nano-titanium dioxide, and disperse evenly by ultrasonication for 5 minutes to form a suspension of nano-titanium dioxide powder;

[0033] (2) Surface chemical modification of carbon nanotubes:

[0034] Add the multi-walled carbon nanotube dispersion liquid dropwise to the polyacryloyl chloride polymerization solution, add 0.07 parts of accelerator triethylamine, stir at 80-83°C for 1 d, centrifuge for 15 min, pour off the supernatant, add 1,4-di Ultrasonic dispersion of oxyhexane for 1 hour, centrifugation for 10 minutes, repeated operation 3 times, then dispersion into 1,4-dioxane solution, ultrasonication for 1 ...

Embodiment 2

[0044]A method for preparing superfine fiber polyurethane synthetic leather with modified nano-titanium dioxide-surface grafted carbon nanotubes, is characterized in that it comprises the steps:

[0045] (1) Dispersion of nano titanium dioxide:

[0046] Add 0.12 parts of dispersant sodium hexametaphosphate and 60 parts of deionized water to 4 parts of anatase nano-titanium dioxide, and disperse evenly by ultrasonication for 15 minutes to form a suspension of nano-titanium dioxide powder;

[0047] (2) Surface chemical modification of carbon nanotubes:

[0048] Add the multi-walled carbon nanotube dispersion liquid dropwise to the polyacryloyl chloride polymerization solution, add 0.08 parts of accelerator triethylamine, stir at 80-83°C for 2 days, centrifuge for 20 minutes, pour off the supernatant, add 1,4-di Ultrasonic dispersion of oxyhexane for 2 hours, centrifugation for 15 minutes, repeated operation 3 times, then dispersion into 1,4-dioxane solution, ultrasonication for...

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PUM

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Abstract

The invention discloses a method for preparing ultrafine fiber polyurethane synthetic leather by carbon nanotubes grafted with modified nano-titanium dioxide on the surfaces. The method comprises: diluting polyurethane resin with a solvent, adding a filler light calcium carbonate, a defoaming agent, a thickener, a nanometer titanium dioxide powder suspension, and carbon nanotubes grafted with polyacryloyl chloride on the surfaces into the solution, carrying out ultrasonic dispersion to obtain a uniform polyurethane impregnated emulsion, rolling a base cloth pretreated by polyvinyl alcohol through a roller coater with the polyurethane impregnated emulsion, putting the base cloth into a water-DMF mixed coagulating bath to obtain solid polyurethane, putting the base cloth into an aqueous solution, carrying out stirring so that the polyvinyl alcohol is degraded and dissolved, drying the base cloth, dipping the washed dried base cloth into a mixed solution of sodium hydroxide, ethylenediamine and a penetrant, carrying out vibration for a reaction, and opening fibers to obtain the ultrafine fiber polyurethane synthetic leather.

Description

technical field [0001] The invention belongs to the field of synthetic leather, and in particular relates to a method for preparing superfine fiber polyurethane synthetic leather by using modified nano-titanium dioxide-surface-grafted carbon nanotubes. Background technique [0002] Ultrafine fiber polyurethane synthetic leather is formed by compounding polyurethane and polyamide ultrafine fiber. polyamide microfiber [0003] Dimensional cross-linking forms a network structure, which is similar to the structure and performance of dermal collagen fibers, and acts as a skeleton and support. [0004] Polyurethane is distributed around the fibers, so that the synthetic leather fibers and the leather surface form a whole through physical and chemical actions, and [0005] Has properties similar to natural leather. Microfiber polyurethane synthetic leather has the inherent moisture absorption of natural leather [0006] Breathable, and superior to natural leather in terms of ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/0004D06N3/0011D06N3/0059D06N3/0063D06N3/0077D06N3/0081D06N3/0088D06N3/144D06N2205/246D06N2209/046D06N2209/1671D06N2209/1685D06N2211/28
Inventor 孙桂芝
Owner 孙桂芝
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