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Polyelectrolyte complex coating and preparation method thereof

A polyelectrolyte and composite technology, which can be used in coatings, devices for coating liquids on surfaces, and surface pretreatment, etc., can solve the problems of low degree of automation, low preparation efficiency, low utilization rate of raw materials, etc., so as to improve the utilization rate. , increase the potential, improve the effect of the assembly process

Active Publication Date: 2018-05-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention utilizes the high-efficiency raw material utilization rate and convenient preparation characteristics of polyelectrolyte complexes to explore a new method for preparing polyelectrolyte coatings, thereby improving the low preparation efficiency, low degree of automation and raw material utilization in previous preparation methods. Low rate and other technical issues

Method used

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  • Polyelectrolyte complex coating and preparation method thereof
  • Polyelectrolyte complex coating and preparation method thereof
  • Polyelectrolyte complex coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of poly-L-lysine / sodium hyaluronate (PLL / HA) composite coating

[0042] (1) Preparation of polyelectrolyte complex stable suspension solution

[0043] Prepare 2 mg / ml sodium hyaluronate (HA, molecular weight 200,000) aqueous solution and 1 mg / ml poly-L-lysine (PLL, molecular weight 70,000) aqueous solution; then, quickly add the PLL aqueous solution dropwise to an equal volume of HA aqueous solution , and stirred rapidly for 1 minute at a stirring speed of 1000 rpm to obtain a PLL / HA complex suspension;

[0044] Next, an equal volume of absolute ethanol to the PLL / HA complex suspension was added and stirred rapidly at 1000 rpm for one minute. Finally, a stable PLL / HA complex suspension was prepared, the particle diameter of the PLL / HA complex nanoparticles was 180 nm, and the surface Zeta potential was -18 mV.

[0045] (2) Primary coating prepared by ultrasonic spraying

[0046] The PLL / HA composite suspension prepared in (1) is atomized and deposited on ...

Embodiment 2

[0053] Preparation of poly-L-lysine / sodium hyaluronate (PLL / HA) composite coating

[0054] (1) Preparation of polyelectrolyte complex stable suspension solution

[0055] Prepare 2 mg / ml sodium hyaluronate (HA, molecular weight 200,000) aqueous solution and 1 mg / ml poly-L-lysine (PLL, molecular weight 70,000) aqueous solution; then, quickly add the PLL aqueous solution dropwise to an equal volume of HA aqueous solution , and stirred rapidly for 1 minute at a stirring speed of 1000 rpm to obtain a PLL / HA complex suspension; the particle diameter of the PLL / HA complex nanoparticles was 210 nm, and the surface Zeta potential was -28 mV.

[0056] (2) Primary coating prepared by ultrasonic spraying

[0057] The PLL / HA composite suspension prepared in (1) is atomized and deposited on the surface of the polylactic acid substrate by ultrasonic spraying technology, the frequency of ultrasonic atomization is 100KHz, and the time of ultrasonic atomization spraying is 30 minutes, and the ...

Embodiment 3

[0061] Preparation of poly-L-lysine / sodium hyaluronate (PLL / HA) composite coating

[0062] (1) Preparation of polyelectrolyte complex stable suspension solution

[0063] Prepare 2 mg / ml sodium hyaluronate (HA, molecular weight 200,000) aqueous solution and 1 mg / ml poly-L-lysine (PLL, molecular weight 70,000) aqueous solution; then, quickly add the PLL aqueous solution dropwise to an equal volume of HA aqueous solution , and stirred rapidly for 1 minute at a stirring speed of 1000 rpm to obtain a PLL / HA complex suspension;

[0064] Next, an equal volume of absolute ethanol to the PLL / HA complex suspension was added and stirred rapidly at 1000 rpm for one minute. Finally, a stable PLL / HA complex suspension was prepared, the particle diameter of the PLL / HA complex nanoparticles was 180 nm, and the surface Zeta potential was -18 mV.

[0065] (2) Spin coating to prepare primary coating

[0066] The PLL / HA composite suspension prepared in (1) was deposited onto the surface of the...

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Abstract

The invention discloses a polyelectrolyte complex coating based on a spraying technology. A preparation method of the polyelectrolyte complex coating comprises the following steps that a polyelectrolyte complex is used as a basis, annealing treatment is carried out on the polyelectrolyte complex after spraying, and finally the uniform and complete polyelectrolyte complex coating is obtained. According to the preparation method, the preparation efficiency of the coating and the utilization rate of polyelectrolyte material are greatly improved, and the automation level of the preparation processis greatly promoted.

Description

technical field [0001] The invention relates to the technical field of coating preparation, in particular to a polyelectrolyte composite coating and a preparation method thereof. Background technique [0002] Polymers with ionizable ionic groups on their molecular chains are called polyelectrolytes. When a polyelectrolyte is dissolved in a solvent with a large dielectric constant, dissociation occurs, forming high-molecular ions and many small-molecular ions in solution. Polyelectrolyte materials include synthetic polyelectrolytes, such as polyacrylic acid, sodium polybenzenesulfonate, poly(4-vinylpyridine), etc.; natural polymer polyelectrolytes mainly include chitosan, sodium alginate, sodium hyaluronate and Chemically modified cellulose, they are all polysaccharides derived from nature; in a broad sense, most of the biological macromolecules (such as DNA, protamine sulfate, etc.) related to life activities are also polysaccharides. electrolyte. [0003] Due to the exte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/02B05D3/02B05D7/24
CPCB05D1/02B05D3/0254B05D7/24
Inventor 计剑任科峰汪璟
Owner ZHEJIANG UNIV
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