Method for preparing acrylic resin modified graphene oxide leather tanning agent

A technology of acrylic resin and oxidized stone, which is applied in small raw hide/big raw hide/leather/fur treatment, small raw hide/large raw hide/leather skin/fur chemical treatment, tanning treatment, etc. It can solve formaldehyde pollution, formaldehyde content, Carcinogenic, shortage and other problems, to achieve good application prospects, eliminate pollution, soft hand effect

Inactive Publication Date: 2012-07-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is still a certain gap between the quality of leather tanned by these tanning agents and chrome tanning agents, and there are also problems of pollution and resource shortage after a large amount of aluminum, zirconium, and titanium tanning agents are used; vegetable tanning agents are derived from the roots and stems of certain plants....

Method used

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  • Method for preparing acrylic resin modified graphene oxide leather tanning agent
  • Method for preparing acrylic resin modified graphene oxide leather tanning agent

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preparation example Construction

[0020] The preparation method of the present invention firstly uses concentrated sulfuric acid, sodium nitrate and potassium permanganate etc. to oxidize flake graphite to prepare graphene oxide, and the effect of oxidation is to introduce hydroxyl, carboxyl, epoxy groups etc. on the structure of graphene At the same time, the graphite expands and the interlayer distance becomes larger. Then use methacrylic acid and acrylic acid to enter between graphene oxide sheets for in-situ intercalation compounding and polymerization reaction, so that graphene oxide, methacrylic acid and acrylic acid form copolymers, and acrylic resin modified graphene oxide leather tanning is obtained. agent.

[0021] The preparation method of acrylic resin modified graphene oxide leather tanning agent of the present invention is realized by the following steps:

[0022] Step 1: Preparation of graphene oxide:

[0023] Slowly add 50 parts by weight of concentrated sulfuric acid to a mixture of 5 parts ...

Embodiment 1

[0028] Step 1: Preparation of graphene oxide:

[0029] Slowly add 50 parts by weight of concentrated sulfuric acid to a mixture of 5 parts by weight of graphite powder with a particle size of less than 30 microns and 5 parts by weight of sodium nitrate under stirring, and control the temperature of the system to <20°C. Slowly add 18 parts by weight of potassium permanganate; then react at 50°C for 30 minutes, then slowly add 280 parts of deionized water, heat up to 100°C for 4 hours; then drop the temperature to 70°C and add 20 parts by weight, mass A hydrogen peroxide solution with a fraction of 30% was reacted for 30 minutes, washed with deionized water, adjusted to a pH of 6, dispersed by ultrasonic waves for 30 minutes to obtain a graphene oxide aqueous solution, and the graphene oxide content was controlled at 0.4%;

[0030] Step 2: Preparation of acrylic resin modified graphene oxide:

[0031] Take 60 parts by weight of graphene oxide aqueous solution, add 8 parts by we...

Embodiment 2

[0033] Step 1: Preparation of graphene oxide:

[0034] Slowly add 50 parts by weight of concentrated sulfuric acid to a mixture of 5 parts by weight of graphite powder with a particle size of less than 30 microns and 5 parts by weight of sodium nitrate under stirring, and control the temperature of the system to <20°C. Slowly add 18 parts by weight of potassium permanganate; then react at 50°C for 30 minutes, then slowly add 280 parts of deionized water, heat up to 100°C for 4 hours; then drop the temperature to 70°C and add 20 parts by weight, mass A hydrogen peroxide solution with a fraction of 30% was reacted for 30 minutes, washed with deionized water, adjusted to a pH of 6, dispersed by ultrasonic waves for 30 minutes to obtain a graphene oxide aqueous solution, and the graphene oxide content was controlled at 0.4%;

[0035] Step 2: Preparation of acrylic resin modified graphene oxide:

[0036] Take 70 parts by weight of graphene oxide aqueous solution, add 10 parts by w...

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Abstract

The invention relates to a method for preparing an acrylic resin modified graphene oxide leather tanning agent. Pollution becomes a main problem that hampers the sustainable development of leather industry, wherein a chrome tanning agent is one of leading pollution sources. The method comprises the following steps of: adding concentrated sulfuric acid into a mixture of graphite powder and sodium nitrate, adding potassium permanganate, raising the temperature, reducing the temperature, washing, and dispersing by using ultrasonic waves to obtain an aqueous solution of graphene oxide; and adding methacrylic acid and acrylic acid into the aqueous solution of graphene oxide, treating by using ultrasonic waves, heating, dripping an initiator solution, keeping the temperature, reacting, and controlling the solid content to be 15 percent to obtain a product. The leather tanning agent can be used as a main tanning agent and is used for tanning leather; the tensile strength, the tearing strength and the breaking elongation of the tanned leather are equivalent to those of chrome tanned leather, and the tanned leather has soft and smooth handfeel; the leather tanning agent can substitute pollutional tanning agents such as a chrome tanning agent, an aldehyde tanning agent and the like, so that the pollution of the chrome tanning agent is reduced or eliminated from the source; and the leather tanning agent has a good application prospect.

Description

Technical field [0001] The present invention involves a preparation method for a leather tannis, which specifically involves a preparation method for a aligo oxide citrine tannant in acrylic. Background technique [0002] At present, the main problem that plagues the sustainable development of the leather industry is the problem of pollution, of which chromium tannis is one of the most important sources of pollution.In response to the pollution of chromium tannasters, the current solutions to the domestic and foreign solutions are: First, the use of high -efficiency chromium tannasas to improve the penetration and absorption of chromium tannants in the skin fiber, and reduce the amount of chromium waste in the production process.Generally, only 60%to 70%of the leather fiber is absorbed by the leather fiber. The absorption rate after using high -efficiency chromium tannasas was increased to more than 90%.The second is to replace chromium tannants with aluminum, iron, tadpoles, tit...

Claims

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Application Information

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IPC IPC(8): C14C3/22
Inventor 吕生华巨浩波邱超超
Owner SHAANXI UNIV OF SCI & TECH
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