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Method for preparing polyacrylate/amino modified oxidized graphene compound leather finishing agent by adopting ultrasonic-assisted method

A composite technology of polyacrylate and graphene, which can be used in small raw hide/big raw hide/leather/fur treatment, small raw hide/big raw hide/leather skin/fur chemical treatment, leather surface treatment, etc. It can solve dry and wet friction fastness Insufficient hardness, low tensile strength, and solvent resistance, etc., to achieve the effect of basic softness, improved tensile strength, and excellent performance

Active Publication Date: 2014-12-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the chain linear structure of conventional polyacrylate molecules, there are certain defects in its performance, including hot stickiness and brittleness, solvent resistance, insufficient dry and wet rubbing fastness, and low tensile strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Preparation of amino-modified graphene oxide:

[0032] Add 0.5 parts of graphene oxide (GO), 40 parts of thionyl chloride (SOCl 2 ) and 2.0 parts of dimethylformamide (DMF), dispersed by ultrasound for 60 minutes, protected by nitrogen, refluxed at 70oC for 240 minutes, and then 60 parts of dimethylformamide was added, and rotary evaporated to constant weight to obtain the product GO-1;

[0033] GO-1 was stirred in a beaker at 0°C, and 6 parts of triethylamine and 2 parts of 25% NH 3 ·H 2 O, continue to stir for 60min and then suction filter, wash with a large amount of water to obtain GO-2;

[0034] Add 30 parts of distilled water at 0°C to the beaker, place it in an ice bath and stir, add 3.0 parts of sodium hydroxide and 2.0 parts of bromine, stir for 15 minutes, then add GO-2, react at 85oC for 180 minutes, heat up to 90oC for 60 minutes, pump Filter, wash with water until the pH of the filtrate is 7, disperse the washed product in distilled water, and dr...

Embodiment 2

[0041] Step 1: Preparation of amino-modified graphene oxide:

[0042] Add 0.6 parts of graphene oxide (GO), 45 parts of thionyl chloride (SOCl 2 ) and 2.1 parts of dimethylformamide (DMF), dispersed by ultrasound for 60 minutes, protected by nitrogen, refluxed at 75oC for 240 minutes, and then 70 parts of dimethylformamide was added, and rotary evaporated to constant weight to obtain the product GO-1;

[0043] GO-1 was stirred in a beaker at 0°C, and 7 parts of triethylamine and 3 parts of 25% NH 3 ·H 2 O, continue to stir for 60min and then suction filter, wash with a large amount of water to obtain GO-2;

[0044] Add 32 parts of distilled water at 0°C to the beaker, place it in an ice bath and stir, add 3.4 parts of sodium hydroxide and 2.1 parts of bromine, stir for 15 minutes, add GO-2, react at 85oC for 180 minutes, heat up to 90oC for 60 minutes, pump Filter, wash with water until the pH of the filtrate is 7, disperse the washed product in distilled water, and dry to ...

Embodiment 3

[0051] Step 1: Preparation of amino-modified graphene oxide:

[0052] Add 0.7 parts of graphene oxide (GO), 50 parts of thionyl chloride (SOCl 2 ) and 2.2 parts of dimethylformamide (DMF), dispersed by ultrasound for 60 minutes, protected by nitrogen, refluxed at 80oC for 240 minutes, and then 80 parts of dimethylformamide was added, and rotary evaporated to constant weight to obtain the product GO-1;

[0053] GO-1 was stirred in a beaker at 0°C, and 8 parts of triethylamine and 4 parts of 25% NH 3 ·H 2 O, continue to stir for 60min and then suction filter, wash with a large amount of water to obtain GO-2;

[0054] Add 34 parts of distilled water at 0°C to the beaker, place it in an ice bath and stir, add 3.8 parts of sodium hydroxide and 2.2 parts of bromine, stir for 15 minutes, add GO-2, react at 85oC for 180 minutes, heat up to 90oC for 60 minutes, pump Filter, wash with water until the pH of the filtrate is 7, disperse the washed product in distilled water, and dry to ...

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Abstract

The invention relates to a method for preparing a polyacrylate / amino modified oxidized graphene compound leather finishing agent by adopting an ultrasonic-assisted method. The method for preparing the polyacrylate / amino modified oxidized graphene compound leather finishing agent by adopting the ultrasonic-assisted method comprises the following steps: carrying out ultrasonic dispersion on oxidized graphene, sulfur dichloride and dimethylformamide; adding dimethylformamide, carrying out spiral evaporating, adding triethylamine and ammonia water, carrying out ice bath reaction and suction filtration, and washing; adding sodium hydroxide and bromine, carrying out ice bath reaction, then adding products obtained through suction filtration, stirring, carrying out suction filtration, and washing to obtain amino modified oxidized graphene; mixing sodium dodecyl sulphate, polyvinyl alcohol 400 and deionized water, dropwise adding part of methyl methacrylate, butyl acrylate, acrylic acid, hydroxyethyl acrylate and an initiating agent, warming, and then dropwise adding the rest part, so that polyacrylate emulsion is obtained; and regulating pH of the polyacrylate emulsion, then adding the amino modified oxidized graphene, and carrying out ultrasonic dispersion, so that the product polyacrylate / amino modified oxidized graphene compound leather finishing agent is obtained. The method for preparing the polyacrylate / amino modified oxidized graphene compound leather finishing agent by adopting the ultrasonic-assisted method has the advantages that defects of polyacrylate are overcome by utilizing physical and mechanical advantages of graphene and application performance of the polyacrylate / amino modified oxidized graphene compound leather finishing agent is effectively enhanced.

Description

technical field [0001] The invention relates to a preparation method of a leather finishing agent, in particular to a method for preparing a polyacrylate / amino-modified graphene oxide composite leather finishing agent by an ultrasonic-assisted method. Background technique [0002] Graphene is a two-dimensional nanomaterial with the thickness of a single layer of carbon atoms, each of which uses sp 2 The hybridization method is connected with other three atoms through σ bonds to form a hexagonal lattice. Graphene has many excellent physical and chemical properties, such as its high light transmittance (97.7%), thermal conductivity [5000J / (m K s)], carrier mobility [2×10 5 cm 2 / (V·s)], etc., making it widely researched and applied in the fields of solar cells, supercapacitors, sensors, etc. In addition, its breaking strength reaches 125GPa, Young's modulus is 1100GPa, and its theoretical specific surface area is 2630m 2 / g, which makes graphene show great potential in th...

Claims

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Application Information

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IPC IPC(8): C09D133/14C09D7/12C14C11/00C08F220/18C08F220/14C08F220/06C08F220/28C09C1/46C09C3/08
CPCC09D133/14C08F220/1804
Inventor 马建中张文博高党鸽李聪敏周永香査姣
Owner SHAANXI UNIV OF SCI & TECH
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