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Epoxy resin-based graphene oxide nano-leather tanning agent and preparation method thereof

A technology of epoxy resin and graphene, which is applied in the field of leather tanning agents, can solve problems such as chrome tanning agent pollution, achieve the effects of reducing pollution, wide application prospects, and improving tanning effects

Active Publication Date: 2017-08-08
和麟企业(安徽)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of chrome tanning agents has caused serious pollution problems. At present, research on less chrome tanning, elimination of chrome tanning agent pollution, and development of new green tanning agents are research hotspots (Xu Jiali, Tang Jie, Zheng Rulan, etc. Several chrome-free tanning agents Comparative study on tanning properties. China Leather, 2016, 44 (16): 9-16; Sundar V J, Muralidharan C, Mandal A B.A novel chrome tanning process for minimization of total dissolved solids and chromium in effluents [J]. Journal of Cleaner Production, 2013, 59: 239-244;)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: Preparation of graphene oxide dispersion

[0023] Add 1 part of natural graphite powder, 1 part of sodium nitrate and 40 parts of concentrated sulfuric acid with a mass fraction of 98% to the reactor in sequence, place in an ice-water bath and stir, keep the temperature at 0°C, and add slowly in batches within 1 hour 6 parts of potassium permanganate, continue to stir for 2 hours; heat up to 35°C, react for 7 hours, after the solution color turns purple green, add 150 parts of deionized water dropwise into the reaction system, and the dropping time is 30 minutes; heat up to 80°C, after 40 minutes of reaction, 150 parts of deionized water, 15 parts of 30% H 2 o 2 Add it dropwise into the reaction system, wait for the solution to turn golden yellow, continue to react for 30 minutes, centrifuge to precipitate, wash with deionized water until there is no SO in the solution 2 -4 , then add 0.5 parts of dispersant NNO, and ultrasonically disperse for 1.5 hours to o...

Embodiment 2

[0029] Step 1: Preparation of graphene oxide dispersion

[0030] Add 3 parts of natural graphite powder, 3 parts of sodium nitrate and 60 parts of concentrated sulfuric acid with a mass fraction of 98% to the reactor in sequence, place in an ice-water bath and stir, keep the temperature at 4°C, and add slowly in batches within 1 hour 10 parts of potassium permanganate, continue to stir for 2 hours; heat up to 40°C, react for 8 hours, after the solution color turns purple green, add 200 parts of deionized water dropwise to the reaction system, and the dropping time is 30 minutes; heat up to 85°C, after 40 minutes of reaction, 200 parts of deionized water, 30 parts of 30% H 2 o 2 Add it dropwise into the reaction system, wait for the solution to turn golden yellow, continue to react for 30 minutes, centrifuge to precipitate, wash with deionized water until there is no SO in the solution 2 -4 ,, add 1.0 parts of dispersant NNO again, ultrasonic dispersion 1.5 hours obtains the...

Embodiment 3

[0036] Step 1: Preparation of graphene oxide dispersion

[0037] Add 2 parts of natural graphite powder, 2 parts of sodium nitrate and 50 parts of concentrated sulfuric acid with a mass fraction of 98% to the reactor in sequence, place in an ice-water bath and stir, keep the temperature at 3°C, and add slowly in batches within 1 hour 8 parts of potassium permanganate, continue to stir for 2 hours; heat up to 38°C, react for 8 hours, after the solution color turns purple green, add 200 parts of deionized water dropwise into the reaction system, and the dropping time is 30 minutes; heat up to 85°C, after 40 minutes of reaction, 200 parts of deionized water, 30 parts of 30% H 2 o 2 Add it dropwise into the reaction system, wait for the solution to turn golden yellow, continue to react for 30 minutes, centrifuge to precipitate, wash with deionized water until there is no SO in the solution 2 -4 ,, and then add 0.8 graphene nanosheet dispersion liquid, the content of graphene ox...

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Abstract

The invention discloses an epoxy resin based graphene oxide nanometer leather tanning agent. The epoxy resin based graphene oxide nanometer leather tanning agent is prepared from, by mass, 40-60 parts of graphene oxide dispersion liquid, 25-40 parts of epoxy chloropropane, 15-25 parts of trimethylolpropane, 0.3-0.8 part of an oxidizing agent, 0.1-0.4 part of a strong alkali solution and 0.04-0.08 part of beta-cyclodextrin. The invention further discloses a preparation method of the epoxy resin based graphene oxide nanometer leather tanning agent. Graphene oxide, epoxy chloropropane and trimethylolpropane are adopted as reactant, sodium hydroxide is adopted for manufacturing the strong alkali environment (pH=11-13), and the epoxy resin based graphene oxide nanometer leather tanning agent is prepared and obtained through the catalytic action of beta-cyclodextrin and can be used for leather tanning. The tanning effect of the agent is equal to that of a chrome tanning agent, the contraction temperature of leather can be 105 DEG C, and the tensile strength, tear strength, elongation at break and other performance are equal to those of chrome tanned leather.

Description

technical field [0001] The invention relates to a leather tanning agent, in particular to a preparation method of an epoxy resin-based graphene oxide nanoscale leather tanning agent. Background technique [0002] The process of leather tanning is the process in which the leather tanning agent reacts with the collagen fibers to form a chemical bond. The essence is that the tanning agent and the collagen fibers produce a cross-linked structure, which makes the raw hide denatured to form leather, which makes the leather have low antimicrobial effect and good Excellent mechanical properties and proper elasticity and softness. Leather tanning is a very important process in the tanning industry, and leather tanning agents play a key role in it. The types of tanning agents mainly include metal tanning agents (chrome tanning agents, aluminum tanning agents, titanium tanning agents, etc.), vegetable tanning agents, aldehyde tanning agents, organic tanning agents, etc. At present, ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/22
CPCC14C3/22
Inventor 吕生华朱琳琳
Owner 和麟企业(安徽)有限公司
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