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Amino-terminated hyperbranched polyamide modified waste dander is used as graphene oxide monolayer small size dispersant and its preparation method and application

A technology of amino-terminated hyperbranching and waste dander, applied in the direction of single-layer graphene, chemical instruments and methods, applications, etc., can solve the problems of inability to produce waste dander, reduce consumption, improve softness, improve affinity water effect

Active Publication Date: 2022-07-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the waste dander treatment method still cannot effectively utilize all the waste dander

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] A kind of preparation method and using method of amino-terminated hyperbranched polyamide modified waste dander used as graphene oxide monolayer small size dispersant, the concrete steps are:

[0038] (1) The preparation of the degraded waste dander solution includes the following steps:

[0039] Mix 200-300 parts of alkali solution and 25-30 parts of waste dander, stir and react at 80-90 ° C for 10-12 hours, then suction filtration while hot to remove filter residue, and the filtrate is an alkali-degraded waste dander solution;

[0040] 200-300 parts of the alkali-degraded waste dander solution obtained above are adjusted to pH 9-11 with dilute acid, 4-6 parts of alkaline protease are added, stirred at 50-60° C. for 5-6 hours, and removed by rotary evaporation The solid content of the degraded waste dander dispersant obtained by moisture control is 10-15%.

[0041] The waste skin scraps are waste skin scraps produced by tanneries, leather products factories, etc. duri...

Embodiment 1

[0063] (1) The preparation of the degraded waste dander solution includes the following steps:

[0064] 200 parts of sodium hydroxide solution with a mass fraction of 3% and 25 parts of waste dander were mixed, stirred and reacted at 80 ° C for 10 hours, and then filtered while hot to remove the filter residue, and the filtrate was an alkali-degraded waste dander solution;

[0065] 200 parts of the alkali-degraded waste dander solution obtained above were adjusted to pH 9 with dilute hydrochloric acid with a concentration of 2 mol / L, 4 parts of alkaline protease were added, stirred at 50° C. for 5 hours, and the resulting degradation was controlled by removing moisture by rotary evaporation. The solids content of the waste dander solution is 10%.

[0066] (2) Synthesis of amino-terminated hyperbranched polyamide

[0067] Put 52 parts of triethylenetetramine into the reaction vessel, under nitrogen protection, add dropwise a mixed solution of 43 parts of methyl acrylate and 10...

Embodiment 2

[0075] (1) The preparation of the degraded waste dander solution includes the following steps:

[0076] Mix 300 parts of potassium hydroxide with a mass fraction of 5% and 30 parts of waste dander, stir and react at 90 ° C for 12 hours, and then suction filtration while hot to remove the filter residue, and the filtrate is an alkali-degraded waste dander solution;

[0077] 300 parts of the alkali-degraded waste dander solution obtained above were adjusted to pH 11 with 3 mol / L dilute sulfuric acid, 6 parts of alkaline protease were added, stirred at 60° C. for 6 hours, and the obtained degraded waste dander was controlled by removing moisture by rotary evaporation. The solids content in the solution was 15%.

[0078] (2) Synthesis of amino-terminated hyperbranched polyamide

[0079] 62 parts of triethylenetetramine were put into the reaction vessel, and the mixed solution of 53 parts of methyl acrylate and 120 parts of methanol was added dropwise under nitrogen protection. A...

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Abstract

The invention discloses an amino-terminated hyperbranched polyamide modified waste dander used as a graphene oxide monolayer small-size dispersant, and a preparation method and application thereof. In the invention, the modified degraded waste dander and carboxymethylated modified graphene oxide are intercalated and compounded by the amino-terminated hyperbranched polyamide, so as to prepare oxidative compounds with few lamellae and small sizes, which are suitable for use as leather tanning agents and fatliquoring agents. Graphene nanosheet dispersion. The invention prepares a degraded dandruff solution with a smaller relative molecular mass by controlling the alkali degradation and enzymatic degradation conditions of the waste dandruff, which is beneficial to intercalation and dispersion of the graphite oxide nano-sheet layer, and is beneficial to the formation of steric hindrance and lamellae. The repulsive force between the layers, the hydrophilicity of the graphene oxide nanosheets and the dispersibility in water are relatively high. Improve the softness, fullness and elasticity of leather, and reduce the discharge of chrome tanning agents, dyes and fatliquors in wastewater.

Description

technical field [0001] The invention belongs to the field of nano-composite materials, and in particular relates to an amino-terminated hyperbranched polyamide modified waste dander used as a graphene oxide monolayer small-size dispersant and a preparation method and application thereof. Background technique [0002] The biggest problem of graphene oxide as a nanomaterial is that it is difficult to form a uniform and stable dispersion in the use system, especially it is difficult to form a uniform and stable monolayer dispersion. The reason why it is difficult to form a stable dispersion system of graphene oxide monolayer is the lamellar structure of graphene oxide itself. The nano-lamellar structure of graphene oxide is different from other granular nanomaterials such as nano-silica, titanium dioxide, carbonic Calcium, etc., graphene oxide is a lamellar material, the thickness of the lamella is in the range of nanomaterials, the thickness of the graphene oxide monolithic la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/198C14C3/02C14C9/02C08G73/02
CPCC01B32/198C14C3/02C14C9/02C08G73/028C01B2204/02
Inventor 吕生华刘相刘雷鹏杨震郭子轶杨俊杰
Owner SHAANXI UNIV OF SCI & TECH
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