Titanium tanning agent/graphene-oxide nanometer composite tanning agent and preparing method thereof

A compound 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. Gap, can not replace chrome tanning agents and other issues, to achieve good elasticity and fullness

Active Publication Date: 2016-07-13
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 method for improving the tanning performance of titanium tanning agents is mainly to form composite tanning agents with chrome tanning agents, aluminum tanning agents, zirconium tanning agents, etc. There is still a gap, making it impossible to replace chrome tanning agents (Yang Meng, Li Rui, Shan Zhihua, etc., the application of common chrome-free combined tanning methods, Leather Science and Engineering, 2915, 25 (2): 27~31)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] step one : Preparation of titanium salt solution

[0025] It is prepared by mixing basic titanium sulfate and sulfuric acid solution with a mass fraction of 5% in a mass ratio of 1:1.

[0026] Step 2: Preparation of graphene oxide suspension

[0027] Add 45 parts of concentrated sulfuric acid with a mass fraction of 98% to the reactor, keep the temperature at 0°C, add 3 parts of graphite powder, stir evenly, slowly add 6 parts of potassium permanganate and 1 part of sodium nitrate in batches within 1 hour The mixture was stirred and reacted at 0°C for 4 hours, heated to 35°C, and kept for 7 hours, then slowly added 200 parts of deionized water, heated to 80°C, reacted for 40 minutes, and 15 parts of 30% H 2 o 2 Add it dropwise into the reaction system, and continue to react for 30 minutes after the solution turns golden yellow, centrifuge and precipitate and wash until the pH of the washing water is 5, and prepare a suspension of graphene oxide nanosheets by ultraso...

Embodiment 2

[0038] step one : Preparation of titanium salt solution

[0039] It is prepared by mixing basic titanium chloride and sulfuric acid solution with a mass fraction of 5% in a mass ratio of 1:1.

[0040] Step 2: Preparation of graphene oxide suspension

[0041] Add 60 parts of concentrated sulfuric acid with a mass fraction of 98% to the reactor, keep the temperature at 4°C, add 4 parts of graphite powder, stir evenly, slowly add 10 parts of potassium permanganate and 3 parts of sodium nitrate in batches within 1 hour The mixture was stirred and reacted at 4°C for 6 hours, heated to 40°C, and kept for 8 hours, then slowly added 300 parts of deionized water, heated to 85°C, reacted for 50 minutes, and 30 parts of 30% H 2 o 2 Add it dropwise into the reaction system, and continue to react for 40 minutes after the solution turns golden yellow, centrifuge and precipitate and wash until the pH of the washing water is 6, and prepare a suspension of graphene oxide nanosheets by ultr...

Embodiment 3

[0052] step one : Preparation of titanium salt solution

[0053] It is prepared by mixing basic titanium sulfate or basic titanium chloride with 5% sulfuric acid solution in a mass ratio of 1:1.

[0054] Step 2: Preparation of graphene oxide suspension

[0055] Add 50 parts of concentrated sulfuric acid with a mass fraction of 98% to the reactor, keep the temperature at 3°C, add 3.5 parts of graphite powder, stir well, slowly add 8 parts of potassium permanganate and 2 parts of sodium nitrate in batches within 1 hour The mixture was stirred and reacted at 2°C for 5 hours, heated to 40°C, and kept for 7 hours, then slowly added 250 parts of deionized water, heated to 80°C, reacted for 50 minutes, and 20 parts of 30% H 2 o 2 Add it dropwise into the reaction system, and continue to react for 40 minutes after the solution turns golden yellow, centrifuge and precipitate and wash until the pH of the washing water is 6, and prepare a suspension of graphene oxide nanosheets by ul...

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Abstract

The invention discloses a titanium tanning agent / graphene-oxide nanometer composite tanning agent. The titanium tanning agent / graphene-oxide nanometer composite tanning agent is prepared from, by mass, 40-50 parts of titanium salt solutions, 40-50 parts of graphene oxide nanometer-sheet layer dispersion liquid and 5-8 parts of dispersing agent. The invention further discloses a preparing method of the titanium tanning agent / graphene-oxide nanometer composite tanning agent. The tanning agent can be used as a leather tanning agent; when the weight of the solid titanium tanning agent / graphene-oxide nanometer composite tanning agent is 5% of that of leather, the shrinkage temperature of the tanned leather is up to 105 DEG C, the absorption rate of the titanium tanning agent is 95%, the absorption rate of graphene oxide is larger than 99%, the tanned leather is washable and resistant to storage, and has the good softness, elasticity and fullness.

Description

technical field [0001] The invention belongs to the technical field of preparation of leather tanning agents, and in particular relates to a titanium tanning agent / graphene oxide nanometer composite tanning agent and a preparation method thereof. Background technique [0002] Leather tanning agent is a chemical substance that can turn raw hide into leather. It can be used as chrome tanning agent, zirconium tanning agent, titanium tanning agent, aluminum tanning agent, iron tanning agent, vegetable tanning agent, aldehyde tanning agent In fact, because chrome tanning agents have the best overall performance in tanning leather, currently only the performance of chrome tanning agents has been widely recognized, and chrome tanning leather accounts for about 90% of leather output (Li Feng, He Qing, Dan Nianhua, Wang Kangjian , Dan Weihua, New progress in research on chrome-free tanning agents, West Leather, 2012,34(10):33-37;). The problem caused by the extensive use of chrome t...

Claims

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Application Information

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Patent Type & Authority Applications(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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