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Zinc salt/graphene oxide nanocomposite tanning agent and preparation method thereof

A composite tanning agent, graphene technology, applied in the chemical treatment of small raw hides/large raw hides/leather hides/furs, small raw hides/large raw hides/leather/fur treatment, tanning treatment, etc., which can solve the problem of small amount of nano-tanning agent. , leather firmness and mechanical properties are not as good as other problems, to achieve the effect of improving tanning effect, elasticity and fullness.

Active Publication Date: 2017-10-20
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

Graphene oxide as a leather tanning agent has the characteristics of a small amount of nano-tanning agent and a significant effect, but the compactness and mechanical properties of leather tanned with a single graphene oxide nano-tanning agent are not as good as those tanned with metal tanning agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The preparation method of the dispersant is as follows: 100-150 parts of deionized water, heating to 80-90°C, and simultaneously adding 40-50 parts of the monomer mixture solution and 30-40 parts of the initiator solution dropwise, and the dropping time is 30-90°C. For 40 minutes, after the feeding is completed, keep the temperature and react for 1-2 hours, then adjust the pH of the product to 6-7 with the mass fraction of diethanolamine, and control the mass fraction of the product at 18%-20%.

[0021] The monomer mixed solution is formed by mixing acrylic acid, hydroxyethyl acrylate, itaconic acid and deionized water in a mass ratio of 15:10:5:10.

[0022] The initiator solution is obtained by dissolving 2 parts of ammonium persulfate, or potassium persulfate, or sodium persulfate in 50 parts of deionized water.

[0023] The zinc salt solution is prepared by mixing and dissolving zinc sulfate, or zinc acetate, or zinc chloride and deionized water at a mass ratio of 1:...

Embodiment 1

[0026] Step 1: Preparation of graphene oxide nanosheet suspension

[0027] Add a mixture of 4 parts of powdered graphite and 10 parts of potassium permanganate to 60 parts of concentrated sulfuric acid at a temperature of 5°C within 1 hour, keep the temperature at 5°C for 3 hours, and raise the temperature to 50°C. Insulate and react for 5 hours, then raise the temperature to 70°C, add 150 parts of deionized water, react at 40°C for 30 minutes, cool down to 25°C, slowly add 8 parts of hydrogen peroxide with a mass fraction of 30%, and the addition time is 30 minutes, and then incubated for 30 minutes to obtain a graphene oxide dispersion. The product is subjected to multiple precipitation washings until the pH of the washing water is 6.5, and then ultrasonically dispersed for 1 hour to obtain a graphene oxide dispersion. The mass fraction of graphene oxide is controlled at 0.5%~0.7%, and the product is a graphene oxide suspension. , the graphene oxide sheet size is 5~50nm.

...

Embodiment 2

[0040] Step 1: Preparation of graphene oxide nanosheet suspension

[0041] Add a mixture of 6 parts of powdered graphite and 15 parts of potassium permanganate to 90 parts of concentrated sulfuric acid at a temperature of 10°C within 1 hour, keep the temperature at 10°C for 5 hours, then raise the temperature to 60°C , heat preservation reaction for 7 hours, then raise the temperature to 80°C, add 200 parts of deionized water, react at 50°C for 50 minutes, cool down to 30°C, slowly add 4 parts of hydrogen peroxide with a mass fraction of 30%, and the addition time is 50 minutes, and then incubated for 30 minutes to obtain a graphene oxide dispersion. The product was precipitated and washed several times until the pH of the washing water was 7.0, and then ultrasonically dispersed for 1 hour to obtain a graphene oxide dispersion. The mass fraction of graphene oxide was controlled at 0.5~0.7%, and the product was a graphene oxide suspension. The size of graphene oxide sheets is ...

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Abstract

The invention discloses a zinc salt / graphene oxide nano composite tanning agent, made from the following materials according to parts by weight: 40-50 parts of graphene oxide nano-sheet suspension, 10-20 parts of a dispersing agent, 50-60 parts of zinc salt solution and 40-50 parts of deionized water; the invention also discloses a preparation method of the zinc salt / graphene oxide nano composite tanning agent; the green leather tanning agent prepare through the invention is useful in the tanning of various leathers, the leathers are tanned through multi-point chemical bond combination formed by active groups and collagen on the zinc salt agent graphene oxide in the zinc salt / graphene oxide nano composite tanning agent and through nano-effect of graphene oxide nano-sheets, the tanning effect has a significant increase compared with the method of using purely the zinc salt tanning agent or graphene oxide nano tanning agent, and the tanned leather has good softness and elasticity.

Description

technical field [0001] The invention belongs to the technical field of preparation of leather tanning agents, and in particular relates to a zinc salt / graphene oxide nanomaterial composite tanning agent and a preparation method thereof. Background technique [0002] At present, the research and development of chrome-free tanning agents have become the focus of research. The reason is that although chrome tanning agents have a good tanning effect, there is a large amount of chromium-containing pollutants produced by chrome tanning agents and the defects that are difficult to control (E Tao , Yang Shuyi, Ma Hongrui, et al., Research on the Effect of Citric Acid on the Precipitation of Trivalent Chromium in Tannery Wastewater, China Leather, 2015,, 4(15): 21-24). In the development and research of chromium-free tanning agents, one method is to modify traditional non-chrome metal tanning agents such as aluminum tanning agents, iron tanning agents, titanium tanning agents and zir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/04
CPCC14C3/04
Inventor 吕生华罗潇倩
Owner 安徽翰邦科技咨询有限公司
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