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Natural phenolic aldehyde-polyethyleneimine bionic adhesion coating and preparation method thereof

A polyethylene imine bionic sticky, polyethylene imine technology, applied in the coating and other directions, can solve the problems of easy decomposition, slow deposition, complicated process, etc., to achieve the effect of promoting deposition, fast deposition method, and reducing the cost of raw materials

Active Publication Date: 2021-11-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: the purpose of the present invention is to provide a natural phenolic-polyethyleneimine biomimetic adhesive coating and its preparation method to solve the problem that the existing catechol biomimetic adhesive coating is easy to decompose under alkaline conditions, deposits slowly, and the process complicated question

Method used

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  • Natural phenolic aldehyde-polyethyleneimine bionic adhesion coating and preparation method thereof
  • Natural phenolic aldehyde-polyethyleneimine bionic adhesion coating and preparation method thereof
  • Natural phenolic aldehyde-polyethyleneimine bionic adhesion coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The surface of mica, a natural phenol - polyethyleneimine biomimetic coating preparation method, comprising the steps of:

[0022] (1) the mass ratio of 2: 1 of 3,4-dihydroxybenzaldehyde and polyethyleneimine was dissolved in pH = 8, 10mM Tris buffer containing 500mMNaCl of;

[0023] (2) release the new mica into a good buffer, shock 60min;

[0024] (3) the mica removed from the container with forceps, rinsed with deionized water, blown dry with a stream of nitrogen to the surface.

[0025] AFM topography of the coating deposited surface coating test results figure 1 Indicated by figure 1 Coating a micro seen nanoscale particles, the particle diameter in the range of about 60 ~ 180nm.

[0026] Redeposition can be dissociated by changing the pH of the coating deposited on the way, the specific process is as follows:

[0027] The resulting natural phenol - polyethyleneimine biomimetic coating deposited mother liquor back into the substrate; the mother liquor was adjusted to p...

Embodiment 2

[0029] One kind of cement paste surface of the block of natural phenolic - Preparation polyethyleneimines biomimetic coating, comprising the steps of:

[0030] (1) The water and cement ratio of 4:10 mass mixture, stirring slowly 1min, further rapid stirring 30s, the mixture was poured into a mold, after curing at room temperature to form removal 1d taken conservation;

[0031] (2) the mass ratio of 2: 1 of 3,4-dihydroxybenzaldehyde and polyethyleneimine was dissolved in pH = 10mM Tris buffer 8;

[0032] (3) The test pieces of cement paste into the buffer and shaken 60min;

[0033] (4) The test pieces of cement removed from the container, deionized water and ethanol alternate wash, placed in a vacuum drying oven at 40 ℃ 2d.

[0034] Scanning electron microscopy of the surface of the test piece cement paste natural phenol - polyethyleneimine-sectional morphologies were characterized biomimetic coating, as a result figure 2 FIG: relative to the base structure is loose, the surface of...

Embodiment 3

[0041] One kind of cement mortar natural surface of the block phenol - polyethyleneimine biomimetic coating preparation method, comprising the steps of:

[0042] (1) The ratio of the mastic 3: standard sand and cement is poured into a stirred pot, stirring was started after the water was added slowly 5s water-cement ratio of 0.5, a total stirring time 180s after the stirring was stopped, the mixture was uniformly poured into mold, vibration compaction, 1d cured after demolding curing at room temperature;

[0043] (2) the mass ratio of 2: 1 of 3,4-dihydroxybenzaldehyde and polyethyleneimine was dissolved in pH = 10mM Tris buffer 8;

[0044] (3) A cement mortar test piece surface to be modified into the buffer and shaken overnight;

[0045](4) Remove the cement test block from the container, washed with deionized water, and dried in a vacuum oven to dry 2D.

[0046] The anti-chloride penetration experiment was carried out by RCM method, and the chlorine ion penetration coefficient o...

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Abstract

The invention discloses a natural phenolic aldehyde-polyethyleneimine bionic adhesion coating and a preparation method thereof. The natural phenolic aldehyde-polyethyleneimine bionic adhesion coating is formed by co-depositing phenolic aldehyde natural products in nature and polyethyleneimine in a water solution on the surface of a substrate at normal temperature to form the bionic adhesion coating formed by micro-nano particles through aggregation. The coating has the advantages of high salt resistance, high alkali resistance, simplicity, rapidness, reusability and the like, can be applied to surface modification of cement-based materials with alkaline pore solutions, and can be applied to ocean engineering concrete protection and chloride ion permeation resistance.

Description

Technical field [0001] The present invention relates to a preparation and a coating adhesion, particularly relates to a natural phenol - polyethyleneimine adhesion biomimetic coatings and method of preparation. Background technique [0002] Catechols biomimetic coating adhesion is characterized in containing a catechol functional group, the functional group having vicinal hydroxyls, can interact more strongly with a variety of surfaces, it is widely applied to various substrate surfaces for undifferentiated, general surface modification. Such changes and biomimetic coating may be modified substrate surface wetting, adsorption, density and surface reactivity, and therefore environmental engineering, chemical and bioengineering fields have been widely used. In such biomimetic adhesive layer, the most commonly used type coating polydopamine deposition faster, but more expensive dopamine hydrochloride starting material, and the coating is not usually polyethylene dopamine salinity, u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/02C09D7/63C04B41/83
CPCC09D179/02C09D7/63C04B41/83C04B41/488C04B41/46C04B41/4539C08K5/07
Inventor 张嘉文蒋金洋王兰心
Owner SOUTHEAST UNIV
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