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Preparation method of covalently cross-linked coated polyacrylate-based graphene nanocomposite 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, poor interface interaction, etc., and achieve obvious competitive advantages, good dispersion, and improved coating The effect of poor wear resistance

Active Publication Date: 2019-04-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, the polymer and graphene are mainly combined by non-covalent forces such as Van der Waals force and hydrogen bond, and the interface between the two is poor, and the composite material is obtained. Relatively low performance

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

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

[0026] Step 1: Preparation of carbonylated polyacrylate

[0027] According to the number of parts by mass, after dissolving 0.5-1.0 parts of ammonium persulfate in 62-99 parts of deionized water, place it in a reactor at 75 ° C, and then drop emulsion A and trigger Agent aqueous solution A, add dropwise for 1.0-1.5 h, after dropping, keep warm at 75 ℃ for 0.5-1.0 h; then add emulsion B and initiator aqueous solution B dropwise to it through the dropping device, add dropwise for 2.0-3.0 h, drop After completion, keep the reaction at 75°C for 2.0-3.0 h, cool down to room temperature after the reaction, adjust the pH value to 7.0-8.0, and filter the material to obtain carbonylated polyacrylate;

[0028] Step 2: Preparation of Aminated Graphene Oxide

[0029] According to the number of parts by mass, ...

Embodiment 1

[0037] Step 1: Preparation of carbonylated polyacrylate

[0038] According to the number of parts by mass, after dissolving 0.5 parts of ammonium persulfate in 62 parts of deionized water, place it in a reactor at 75°C, and then drop emulsion A and initiator aqueous solution A to it simultaneously through a dropping device, Add dropwise for 1.0 h, and then keep it at 75 °C for 0.5 h to react at 75 °C for 0.5 h; then add emulsion B and initiator aqueous solution B dropwise to it through the dropping device, add dropwise for 2.0 h, and keep it at 75 °C for 2.0 h after dropping. After the reaction was completed, the temperature was lowered to room temperature, the pH value was adjusted to 7.0, and the material was filtered to obtain carbonylated polyacrylate. Wherein, emulsion A is made of 0.1 part of sodium lauryl sulfate, 0.05 part of branched chain secondary alcohol polyoxyethylene ether, 20 parts of deionized water, 0.60 part of diacetone acrylamide, 15 parts of methacrylic a...

Embodiment 2

[0045] Step 1: Preparation of carbonylated polyacrylate

[0046] In parts by mass, after dissolving 0.7 parts of ammonium persulfate in 70 parts of deionized water, place it in a reactor at 75°C, and then drop emulsion A and initiator aqueous solution A therein through a dropping device, Add dropwise for 1.0 h, and then keep warm at 75°C for 1.0 h after dropping; add emulsion B and initiator aqueous solution B dropwise to it through the dropping device, add dropwise for 2.0 h, and keep warm at 75°C for 3.0 h after dropping. Cool down to room temperature after the reaction, adjust the pH value to 8.0, and filter the material to obtain carbonylated polyacrylate. Wherein, emulsion A is made of 0.15 parts of sodium lauryl sulfate, 0.06 parts of branched chain secondary alcohol polyoxyethylene ether, 25 parts of deionized water, 0.70 parts of diacetone acrylamide, 17 parts of methacrylic acid Methyl acrylate and 23 parts of butyl acrylate were obtained through high-speed shearing ...

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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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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/08C09D7/62C08F220/18C08F220/14C08F220/58
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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