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Graphene modified vinyl acetate-maleic anhydride copolymer flame-retardant leather retanning agent preparation method

A vinyl acetate and graphene modification technology, applied in the field of leather chemicals, can solve the problems of weak double bond reactivity and low degree of copolymerization, and achieve the effects of improving quality grade, improving conductivity and high flame retardant efficiency

Active Publication Date: 2018-08-31
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, graphene oxide itself contains double bonds to copolymerize with vinyl monomers. However, the main part of graphene oxide is composed of relatively stable six-membered rings, and the reactivity of double bonds is weak. Graphene oxide and vinyl monomers The degree of free radical copolymerization is low, and graphene oxide cannot be well grafted to the molecular chain of leather tanning agent

Method used

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  • Graphene modified vinyl acetate-maleic anhydride copolymer flame-retardant leather retanning agent preparation method
  • Graphene modified vinyl acetate-maleic anhydride copolymer flame-retardant leather retanning agent preparation method
  • Graphene modified vinyl acetate-maleic anhydride copolymer flame-retardant leather retanning agent preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of maleic anhydride grafted graphene oxide, in parts by weight

[0027] Add 1 part of graphene oxide and 150 parts of tetrahydrofuran into a 500 mL round-bottomed flask equipped with nitrogen protection device, mechanical stirring and constant pressure dropping funnel, and ultrasonically disperse for 1.0 h; add 6.0 parts of triethylamine, and use 10 Add 3.5 parts of hexachlorocyclotriphosphine cyanide dropwise into the reaction solution, react at 60 °C for 4-6 h, filter under reduced pressure, wash with absolute ethanol, and dry in vacuum; mix the dried product with 150 parts of tetrahydrofuran and ultrasonically disperse Add it back into the device, then add 3.0 parts of ethylenediamine and 6.0 parts of triethylamine dropwise to the system, react at room temperature for 2 h, filter under reduced pressure, wash with absolute ethanol, and dry in vacuum; then dry the product and 150 parts of tetrahydrofuran Mix and ultrasonically disperse and add to the de...

Embodiment 2

[0032] (1) Preparation of maleic anhydride grafted graphene oxide, in parts by weight

[0033]Mix 1 part graphene oxide with 150 parts N,N - Dimethylformamide was added to a 500 mL round bottom flask equipped with a nitrogen protection device, mechanical stirring and a constant pressure dropping funnel, ultrasonically dispersed for 1.0 h; 6.0 parts of triethylamine was added, and 10 parts of N,N - 3.5 parts of hexachlorocyclotriphosphorus cyanide diluted in dimethylformamide were added dropwise to the reaction solution, reacted at 60°C for 4-6 h, filtered under reduced pressure, washed with absolute ethanol, and dried in vacuum; the dried product and 150 parts of N,N -Dimethylformamide is mixed and ultrasonically dispersed and re-added to the device, and then 3.7 parts are added dropwise to the system 1,3 - Propylenediamine and 6.0 parts of triethylamine, reacted at room temperature for 2.5 h, filtered under reduced pressure, washed with absolute ethanol, and dried in vacuum;...

Embodiment 3

[0038] (1) Preparation of maleic anhydride grafted graphene oxide

[0039] Mix 1 part graphene oxide with 150 parts N,N - Dimethylacetamide was added to a 500 mL round bottom flask equipped with a nitrogen protection device, mechanical stirring and a constant pressure dropping funnel, ultrasonically dispersed for 1.0 h; 4.7 parts of pyridine was added, and 10 parts of N,N - 3.5 parts of hexachlorocyclotriphosphorus cyanogen diluted in dimethylacetamide were added dropwise to the reaction solution, reacted at 60°C for 4-6 h, filtered under reduced pressure, washed with absolute ethanol, and dried in vacuum; the dried product and 150 parts of N,N -Dimethylacetamide was mixed and ultrasonically dispersed and re-added to the device, and then 3.7 parts were added dropwise to the system 1,3 - Propylenediamine and 4.7 parts of pyridine, reacted at room temperature for 2.5 h, filtered under reduced pressure, washed with absolute ethanol, and dried in vacuum; then the dried product an...

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Abstract

The invention relates to a graphene modified vinyl acetate-maleic anhydride copolymer flame-retardant leather retanning agent preparation method. The method comprises the steps that graphene oxide reacts with a chlorinating agent and diamine to obtain amino graphene oxide, a maleic anhydride monomer is grafted to aminated graphene oxide, sulfate serves as an initiator, vinyl acetate, maleic anhydride, maleic anhydride modified graphene oxide, acrylamide and the like serve as comonomer, and by means of free radical polymerization, a graphene-based vinyl acetate-maleic anhydride copolymer flame-retardant leather retanning agent is obtained. Modified graphene is connected with vinyl acetate-maleic anhydride copolymer macromolecules through covalent bonds, the very good dispersible uniformityand stability are achieved, the retanning agent is used for retanning and filling of leather, the properties such as flame retardance and conductive, heat resistant, tear resistant and antibacterial property of the leather can be effectively improved, and the finished product level and international competitiveness of leather goods are improved.

Description

technical field [0001] The invention belongs to the technical field of leather chemicals, and in particular relates to a preparation method of a graphene-modified vinyl acetate-maleic anhydride copolymer flame-retardant leather retanning agent. Background technique [0002] Leather products have excellent comprehensive properties such as vapor permeability, water permeability, heat resistance, wear resistance and scratch resistance, and impact resistance, so they are widely used in many fields such as clothing, furniture packaging, and automobile interior decoration. Due to the improvement of people's awareness of fire safety, leather must have good flame-retardant and fire-resistant properties, and the development of high-efficiency flame-retardant leather has become a research hotspot. At present, the flame retardant effect of leather is mainly achieved by adding flame retardants in the market. For example, the patent CN 104450990A discloses a "preparation method of flame ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F285/00C08F218/08C08F222/06C08F220/56C14C3/22
CPCC08F285/00C14C3/22C08F218/08
Inventor 范浩军何亚洲陈意颜俊章培昆
Owner SICHUAN UNIV
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