Graphene/aluminium oxide nano-composite tanning agent and preparation method thereof

A composite tanning agent and aluminum nanotechnology, which is applied in the field of graphene oxide/aluminum nanocomposite tanning agent and its preparation, and can solve the problems that aluminum tanning agent cannot be applied, cannot replace chrome tanning agent, etc.

Active Publication Date: 2015-07-01
安徽翰邦科技咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the improvement of aluminum tanning agents is mainly combined tanning with chromium, zirconium, titanium tanning agents or vegetable tanning agents, glutaraldehyde tanning agents, and synthetic tanning agents with good tanning performance (Liu Zilong, Zhang Hui, Qiang Xihuai, Li Meng. Preparation and application of silicon-aluminum complex tanning agents. China Leather, 2014, 43(21): 223-27; Application in tanning. China Leather, 2013,42(7):1-7; He Qing, Dan Weihua, Dan Nianhua, et al. A fully closed cycle tanning with less chromium based on zirconium-aluminum-titanium complex tanning agent Technology. China Leather, 2013,42(7):5-9), but the effect of these modifications is still limited, resulting in the current aluminum tanning agent still can not be used in leather production, can not replace chrome tanning agent

Method used

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Examples

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Effect test

preparation example Construction

[0020] The preparation method of the graphene oxide nanosheet dispersion liquid is as follows: slowly add 3 to 5 parts of graphite powder into 80 to 100 parts of concentrated sulfuric acid with a mass fraction of 98%, control the temperature of the system at 0 to 5°C, and stir After uniformity, slowly add 10-15 parts of potassium permanganate to react for 3-4 hours, then raise the temperature to 30-40°C and continue the reaction for 2-2.5 hours, then slowly add 150-180 parts of deionized water, and heat up to 80-90 ℃ for 1 to 2 hours; then lower the temperature to 30 ℃ to 35 ℃, add dropwise 35 to 40 parts of hydrogen peroxide solution with a mass fraction of 30%, react for 1 to 1.5 hours, and ultrasonically disperse for 1 to 1.5 hours to prepare graphene oxide nanosheet dispersion Liquid, the graphene oxide nanosheet dispersion liquid contains graphene oxide sheet mass fraction and is 1%; Since the preparation process of the graphene oxide nanosheet dispersion liquid is relativ...

Embodiment 1

[0028] Step 1: Preparation of graphene oxide nanosheet dispersion:

[0029]Slowly add 3 parts of graphite powder to 80 parts of concentrated sulfuric acid with a mass fraction of 98%, control the temperature of the system at 0°C, stir evenly, slowly add 10 parts of potassium permanganate to react for 3 hours, and then raise the temperature to 30°C Continue to react for 2 hours, then slowly add 150 parts of deionized water, raise the temperature to 80°C for 1 hour; then cool down to 30°C, add 35 parts of 30% hydrogen peroxide solution dropwise, react for 1 hour, and ultrasonically disperse for 1 hour to prepare The graphene oxide nanosheet dispersion liquid is controlled to contain the graphene oxide sheet mass fraction in the graphene oxide nanosheet dispersion liquid to be 1%.

[0030] Step 2: Preparation of alkalizing agent solution:

[0031] The alkalizing agent solution is a solution formed by dissolving 10 parts of sodium bicarbonate in 20 parts of deionized water.

[0...

Embodiment 2

[0037] Step 1: the preparation method of graphene oxide nanosheet dispersion liquid:

[0038] Slowly add 5 parts of graphite powder to 100 parts of concentrated sulfuric acid with a mass fraction of 98%, control the temperature of the system at 5°C, stir well and slowly add 15 parts of potassium permanganate to react for 4 hours, and then heat up to 40°C Continue to react for 2.5 hours, then slowly add 180 parts of deionized water, raise the temperature to 90°C and react for 2 hours; then cool down to 35°C and add 40 parts of 30% hydrogen peroxide solution dropwise, react for 1.5 hours, and ultrasonically disperse for 1.5 hours to prepare The graphene oxide nanosheet dispersion liquid is controlled to contain the graphene oxide sheet mass fraction in the graphene oxide nanosheet dispersion liquid to be 1%.

[0039] Step 2: Preparation of alkalizing agent solution:

[0040] The alkalizing agent solution is a solution formed by dissolving 8 parts of sodium carbonate in 20 parts...

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Abstract

The invention discloses a graphene/aluminium oxide nano-composite tanning agent. The graphene/aluminium oxide nano-composite tanning agent is prepared from the following materials in parts by mass: 40-50 parts of a graphene oxide nano-slice dispersion liquid, 25-30 parts of aluminium chloride, 0.5-1 parts of p-toluenesulfonic acid, 20-25 parts of alkalizer solution and 0.5-1 parts of a dispersant. The invention further discloses a preparation method for the graphene/aluminium oxide nano-composite tanning agent, wherein when the solid dosage of the graphene/aluminium oxide nano-composite tanning agent is 5% of a tare, the shrinkage temperature of leather tanned by the graphene/aluminium oxide nano-composite tanning agent achieves 112 DEG C, the absorption rate of the tanning agent achieves 95%, the shrinkage temperature is hardly lowered when the tanned leather is washed for 10 times, and lowered by 5% when the tanned leather is washed for 20 times, and the softness, elasticity, fullness and the like of the tanned leather approximate to those of chrome-tanned leather.

Description

technical field [0001] The invention belongs to the technical field of preparation of leather tanning agents, and in particular relates to a graphene oxide / aluminum nanocomposite tanning agent and a preparation method thereof. Background technique [0002] Leather tanning agent is a chemical substance that can turn raw hide into leather. Its essence is that the tanning agent reacts chemically with skin collagen fibers. The process of chemical reaction between tanning agent and skin collagen is called tanning, and the raw hide after tanning becomes Leather with a certain mechanical strength, storage resistance, softness and certain uses has been developed. In theory, chrome tanning agents, zirconium tanning agents, titanium tanning agents, aluminum tanning agents, iron tanning agents, vegetable tanning agents, aldehyde tanning agents, synthetic tanning agents, etc. can be used as leather tanning agents. The overall performance of leather is the best, only chrome tanning agen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/04
CPCC14C3/04C14C3/08
Inventor 吕生华邓丽娟李莹贺亚亚朱琳琳
Owner 安徽翰邦科技咨询有限公司
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