Polyelectrolyte nanometer flame-retardant coating by adoption of layer-by-layer assembly and preparation method thereof

A layer-by-layer self-assembly, polyelectrolyte technology, applied in coatings, polyamide coatings, chitin polysaccharide coatings, etc., can solve the problem that the flame retardant efficiency needs to be further improved, and achieve a simple and easy preparation method, a wide range of sources, low cost effect

Active Publication Date: 2015-11-25
马德里高等材料研究院 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, most of the polyelectrolytes currently used are ionized nanoparticles, such as montmorillonite, graphene, carbon nanotubes, etc. The coating of these nanoparticles will change the color of the matrix material on the one hand, and flame retardant on the other hand. Efficiency needs to be further improved

Method used

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  • Polyelectrolyte nanometer flame-retardant coating by adoption of layer-by-layer assembly and preparation method thereof
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  • Polyelectrolyte nanometer flame-retardant coating by adoption of layer-by-layer assembly and preparation method thereof

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[0026] According to one aspect of the present invention, a kind of preparation method of layer-by-layer self-assembled polyelectrolyte nano flame retardant coating is provided, comprising the following steps:

[0027] Step 1 is a pretreatment step: soak the base material in an acidic solution, then wash it with water and dry it.

[0028] According to the present invention, the base material is fabric, wood, foam or plastic, preferably fabric such as polyester, foam material such as polyurethane. For immersion, the base material can be processed into a suitable shape such as a cuboid, and a suitable scale, such as centimeters, decimeters or even meters.

[0029] The matrix material is soaked in an acidic solution for pretreatment. This pretreatment helps to improve the adsorption of the surface of the matrix material, thereby facilitating the deposition of some compounds on the surface of the matrix material.

[0030] According to the present invention, soak in the acidic solu...

Embodiment 1

[0053] Cut the polyurethane foam to 10cm×10cm×3cm;

[0054] Weigh 0.5g of polyacrylic acid and add it to 99.5g of deionized water, stir until completely dissolved, and set aside;

[0055] Weigh 5g of chitosan and add it to 995g of deionized water, stir until completely dissolved, and set aside;

[0056] Weigh 20g of sodium alginate and add it to 980g of deionized water, stir until completely dissolved, set aside;

[0057] 1) Pretreatment: Take the cut polyurethane foam and immerse it in the above polyacrylic acid solution, soak it for 300 seconds, wash it with deionized water, and then dry it;

[0058] 2) Self-assembly: Put the above-mentioned pretreated polyurethane foam into the above-mentioned chitosan solution and soak for 60 seconds, then wash it with deionized water and dry it, then put it into the above-mentioned sodium alginate solution and soak it for 60 seconds, and use it Rinse with deionized water, then dry;

[0059] Repeat the above self-assembly process 5 time...

Embodiment 2

[0061] Cut the polyurethane foam to 10cm×10cm×3cm;

[0062] Weigh 0.5g of polyacrylic acid and add it to 99.5g of deionized water, stir until completely dissolved, and set aside;

[0063] Weigh 5g of chitosan and add it to 995g of deionized water, stir until completely dissolved, and set aside;

[0064] Weigh 20g of sodium alginate and add it to 980g of deionized water, stir until completely dissolved, set aside;

[0065] 1) Pretreatment: Take the cut polyurethane foam and immerse it in the above polyacrylic acid solution, soak it for 300 seconds, wash it with deionized water, and then dry it;

[0066] 2) Self-assembly: Put the above-mentioned pretreated polyurethane foam into the above-mentioned chitosan solution and soak for 60 seconds, then wash it with deionized water and dry it, then put it into the above-mentioned sodium alginate solution and soak it for 60 seconds, and use it Rinse with deionized water, then dry;

[0067] Repeat the above self-assembly process 10 tim...

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Abstract

The invention discloses a polyelectrolyte nanometer flame-retardant coating by adoption of layer-by-layer assembly and a preparation method thereof. The preparation method comprises following steps of: 1), preprocessing: putting and soaking base material into an acid solution and cleaning and drying base material with water; 2), self-assembly: putting and soaking pre-processed base material to a cationic polyelectrolyte solution in order to from a layer of ion membrane, taking out the layer of ion membrane and cleaning the ion membrane with water for drying, putting and soaking the ion membrane into the cationic polyelectrolyte solution in order to form an layer of anionic membrane, and cleaning the layer of anionic membrane with water and drying; sequentially repeating above self-assembly process for multiple times so that the polyelectrolyte nanometer flame-retardant coating is prepared by adoption of layer-by-layer assembly on the surface of the base material. The polyelectrolyte nanometer flame-retardant coating by adoption of layer-by-layer assembly and the preparation method thereof have following beneficial effects: the polyelectrolyte nanometer flame-retardant coating is green and eco-friendly and has a simple and feasible preparation method; damage to the internal structure of base material is avoided; high flame-retardant efficiency is obtained; and the preparation method is suitable for formation of flame-retardant coatings on material surfaces including fabric, wood, foam and plastics.

Description

technical field [0001] The invention belongs to the field of flame retardant coating preparation, in particular to a preparation method of layer-by-layer self-assembled polyelectrolyte nano flame retardant coating and the flame retardant coating prepared thereby. Background technique [0002] Layer-by-layer assembly (L-b-L) technology is a surface modification technology developed in the early 1990s, which can accurately modify the composition, thickness and structure of colloidal particle surfaces at the nanoscale control. This assembly technology uses ionized particles as templates, which are alternately immersed in polyelectrolyte solutions with opposite charges, soaked for a certain period of time, taken out and rinsed, and the multilayer film system can be obtained by cycling the above process. Layer-by-layer self-assembly technology has the advantages of wide application range, controllable properties of the generated microspheres, environmental friendliness, simplici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D7/24C09D5/18C09D105/04C09D105/08C09D179/02C09D105/16C09D177/04C09D123/06
CPCB27K3/0278
Inventor 王德义王鑫王锐张秀芹周静宜
Owner 马德里高等材料研究院
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