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Amino-terminated hyperbranched polyamide modified waste leather scraps as graphene oxide single-lamella small-size dispersing agent and preparation method and application thereof

An amino-terminal hyperbranching and waste dander technology, which is applied in the directions of single-layer graphene, chemical instruments and methods, applications, etc., can solve the problems such as the inability to generate waste dander, and achieve the effect of reducing dosage and improving softness.

Active Publication Date: 2019-11-29
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 method for preparing and using waste dander modified by amino-terminated hyperbranched polyamide as a graphene oxide single-layer small-size dispersant, the specific 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 filter while hot to remove the filter residue, the filtrate is alkali degraded waste dander solution;

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

[0041] The waste dander is the waste dander produced by tannery, leather products factory, etc. The waste dander produced actually comes f...

Embodiment 1

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

[0064] Mix 200 parts of sodium hydroxide solution with a mass fraction of 3% and 25 parts of waste dander, stir and react at 80°C for 10 hours, then suction filter while hot to remove the filter residue, and the filtrate is an alkali-degraded waste dander solution;

[0065] Adjust 200 parts of the alkali-degraded waste dander solution obtained above to a pH value of 9 with dilute hydrochloric acid with a concentration of 2 mol / L, add 4 parts of alkaline protease, stir at 50°C for 5 hours, and remove water by rotary evaporation to control the resulting degradation. The solids content in the waste dander solution was 10%.

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

[0067] Put 52 parts of triethylenetetramine into the reaction container, add dropwise a mixed solution of 43 parts of methyl acrylate and 100 parts of methanol under the protection of nitrogen, an...

Embodiment 2

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

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

[0077] Adjust 300 parts of the alkali-degraded waste dander solution obtained above to a pH value of 11 with 3 mol / L dilute sulfuric acid, add 6 parts of alkaline protease, stir at 60°C for 6 hours, and remove moisture by rotary evaporation to control the obtained degraded dander The solids content in the solution was 15%.

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

[0079] Put 62 parts of triethylenetetramine into the reaction container, add dropwise a mixed solution of 53 parts of methyl acrylate and 120 parts of methanol under the protection of nitrogen, and after the dropwise addition, raise the temperature to 40°C for ...

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Abstract

T The invention discloses amino-terminated hyperbranched polyamide modified waste leather scraps used as a graphene oxide single-lamella small-size dispersing agent and a preparation method and application of the amino-terminated hyperbranched polyamide modified waste leather scraps. According to the invention, the amino-terminated hyperbranched polyamide modified waste leather scraps and carboxymethylated modified graphene oxide are subjected to intercalation compounding so as to prepare a graphene oxide nanosheet dispersion liquid which has few lamellas and a small size and is suitable for being used as a leather tanning agent and a fatliquoring agent. According to the method disclosed by the invention, a leather scrap degradation solution with a relatively small relative molecular massis prepared by controlling alkali degradation and enzyme degradation conditions of the waste leather scrap; intercalation dispersion of the graphite oxide nanosheet layer is facilitated; the formationof steric hindrance and repulsive force between sheet layers is facilitated; graphene oxide nanosheet layers are relatively high in hydrophilicity and dispersity in water, and the prepared graphene oxide single-lamella small-size dispersion liquid is used for tanning and fatliquoring leather, so that the softness, fullness and elasticity of the leather can be obviously improved, and the dischargeamount of a chrome tanning agent, a dye and a fatliquoring agent in wastewater is reduced.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, and in particular relates to an amino-terminated hyperbranched polyamide modified waste dander used as a graphene oxide monolithic small-size dispersant and its preparation method and application. Background technique [0002] The biggest problem with the use 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 monolithic dispersion. The reason why it is difficult to form a single-layer stable dispersion system of graphene oxide lies in the layered structure of graphene oxide itself. Calcium, etc., graphene oxide is a kind of sheet material, and the thickness of its sheet is within the range of nanometer materials. nm), few layers (2~10 layers, 2.2~11nm) and multi-layers (10~30 layers, 11nm~33nm) aggregate coexistence system; the plane size of graphene oxide nanosheets ...

Claims

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Application Information

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Patent Type & Authority Applications(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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