Preparation method for covalent crosslinking cladded type polyacrylate-based graphene nano composite finishing agent

A technology of polyacrylate and covalent cross-linking, which is applied in the direction of coating, etc., can solve the problems of low performance of composite materials, high viscosity of composite system, high processing energy consumption, etc., and achieve obvious competitive advantages, good dispersion, coating resistance good abrasive effect

Active Publication Date: 2017-10-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also has disadvantages such as high processing energy consumption and high viscosity of the composite system.
In addition, in the composite materials prepared by the solution blending method and the melt blending

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] The preparation method of covalently cross-linked coated polyacrylate-based graphene nanocomposite finishing agent, is characterized in that, comprises the following steps:

[0026] Step 1: Preparation of carbonylated polyacrylate

[0027] In parts by mass, 0.5-1.0 part of ammonium persulfate was dissolved in 62-99 parts of deionized water, placed in a reactor at 75 °C, and then the emulsion A and the initiator were simultaneously added dropwise to it through a dropping device. Aqueous solution A was added dropwise for 1.0-1.5 h. After dropping, the reaction was kept at 75 °C for 0.5-1.0 h; Emulsion B and aqueous initiator solution B were then added dropwise to it through a dropping device, and added dropwise for 2.0-3.0 h. After the reaction is completed, the reaction is kept at 75 °C for 2.0-3.0 h, and after the reaction is completed, it is lowered to room temperature, the pH value is adjusted to 7.0-8.0, and the material is filtered to obtain the carbonylated polyacr...

Example Embodiment

[0036] Example 1:

[0037] Step 1: Preparation of carbonylated polyacrylate

[0038] In parts by mass, after dissolving 0.5 part of ammonium persulfate in 62 parts of deionized water, it was placed in a reactor at 75 ° C, and then the emulsion A and the initiator aqueous solution A were simultaneously added dropwise to it through a dripping device, After dripping for 1.0 h, the reaction was kept at 75 °C for 0.5 h after the dripping; Emulsion B and the initiator aqueous solution B were added dropwise to it through the dropping device for 2.0 h, and the reaction was kept at 75 °C for 2.0 h after dripping. After the reaction, the temperature was lowered to room temperature, the pH value was adjusted to 7.0, and the material was filtered to obtain the carbonylated polyacrylate. Wherein, Emulsion A is composed of 0.1 part of sodium lauryl sulfate, 0.05 part of branched secondary alcohol polyoxyethylene ether, 20 parts of deionized water, 0.60 part of diacetone acrylamide, 15 part...

Example Embodiment

[0044] Example 2:

[0045] Step 1: Preparation of carbonylated polyacrylate

[0046] In parts by mass, after dissolving 0.7 part of ammonium persulfate in 70 parts of deionized water, it was placed in a reactor at 75 ° C, and then the emulsion A and the initiator aqueous solution A were simultaneously added dropwise to it through a dripping device, After dropping for 1.0 h, the reaction was kept at 75 °C for 1.0 h after the dropping; then, the emulsion B and the initiator aqueous solution B were added dropwise through the dropping device for 2.0 h. After the dropping, the reaction was kept at 75 °C for 3.0 h. After the reaction, the temperature was lowered to room temperature, the pH value was adjusted to 8.0, and the material was filtered to obtain the carbonylated polyacrylate. Among them, the emulsion A is composed of 0.15 parts of sodium lauryl sulfate, 0.06 parts of branched secondary alcohol polyoxyethylene ether, 25 parts of deionized water, 0.70 parts of diacetone acr...

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Abstract

The invention relates to a method. At present, researches about a cladded type polyacrylate-based graphene nano composite material prepared through covalent crosslinking are rarely reported. The method provided by the invention is realized through the following steps: firstly, taking sodium dodecyl sulfate and branched secondary alcohol ethoxylates as emulsifiers, taking butyl acrylate and methyl methacrylate as main monomers and taking diacetone acrylamide as a functional monomer; carrying out an emulsion polymerization method on the components to prepare carbonylated polyacrylate emulsion; then, enabling a graphene oxide water solution prepared by utilizing an improved Hummers method and adipic dihydrazide to react at 30 DEG C for 10h to 12h, so as to prepare aminated graphene oxide; and finally, enabling the carbonylated polyacrylate and the aminated graphene oxide to be subjected to a ketone-hydrazide crosslinking reaction under a weak acidic condition (wherein the pH (Potential of Hydrogen) is equal to 4 to 5), so as to prepare a covalent crosslinking cladded type polyacrylate-based graphene nano composite finishing agent. The covalent crosslinking cladded type polyacrylate-based graphene nano composite finishing agent is applied to leather finishing so that the wear-resisting performance of a finished leather sample is improved.

Description

technical field [0001] The invention relates to a preparation method of a polyacrylate-based graphene nanocomposite coating agent, in particular to a preparation method of a covalently crosslinked polyacrylate-based graphene nanocomposite coating agent. Background technique [0002] Graphene has extremely high mechanical strength, large specific surface area, and excellent electrical and thermal conductivity. Using it as an inorganic nanofiller can improve the mechanical properties, friction resistance, and electrical and thermal conductivity of polymer materials. The dispersion of graphene in the polymer matrix is ​​a key factor affecting the structure and performance of composite materials, so how to choose a suitable preparation method to make graphene nanosheets uniformly and effectively dispersed in the polymer matrix is ​​crucial for the processing of composite materials. Production as well as practical application is critical. [0003] Polyacrylate leather finishing ...

Claims

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Application Information

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IPC IPC(8): C09D133/08C09D7/12C08F220/18C08F220/14C08F220/58
CPCC08F220/18C08F220/1804C08K3/04C08K9/04C08K2201/011C09D133/08C08F220/14C08F220/58
Inventor 马建中张雷高党鸽吕斌张文博
Owner SHAANXI UNIV OF SCI & TECH
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