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Polymer coating with layered porous structure based on in-situ polymerization and preparation method thereof

A polymer coating, porous structure technology, applied in coatings, chitin coatings, alginic acid coatings, etc., to achieve the effect of simplifying convenience

Inactive Publication Date: 2021-08-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the preparation of polyelectrolyte coatings by in situ polymerization, and the preparation of porous structures in coatings through further regulation have yet to be explored.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0042] (1) dissolving 20wt% acrylamide, 30wt% polyacrylic acid and 0.5wt% photoinitiator I-2959 in water to obtain a photoreactive mixed solution;

[0043] (2) Take 100 μL of the mixed solution and drop it on the surface of a hydrophobically treated silicon wafer (2cm×2cm×1mm), cover the surface of the droplet with a cleaned hydrophilic quartz wafer (2cm×2cm×1mm), and place it under ultraviolet light Irradiate under irradiation for 30 minutes to realize the preparation of in-situ polymerized polyacrylamide / polyacrylic acid coating;

[0044] (3) Soak the prepared coating in a 10 mg / mL cross-linking agent (1,5-bis-azido-3-oxapentane) solution for 24 hours and then blow it dry;

[0045] (4) placing the coating humidity containing the crosslinking agent in an environment of 100% for 24 hours to obtain a transparent and smooth coating prepared on the quartz sheet;

[0046] (5) The coating obtained in step (4) is closely attached to the surface of the silicon wafer, and under 365nm...

Embodiment 3

[0049] (1) dissolving 50wt% acrylic acid, 30wt% chitosan and 0.5wt% photoinitiator I-2959 in water to obtain a photoreactive mixed solution;

[0050] (2) Take 200 μL of the mixed solution and drop it on the surface of a hydrophilic treated silicon wafer (2cm×2cm×1mm), cover the surface of the droplet with a clean hydrophobic glass piece (2cm×2cm×1mm), and place it under ultraviolet light Irradiate under irradiation for 20 minutes to realize the preparation of in-situ polymerized polyacrylic acid / chitosan coating;

[0051] (3) Soak the prepared coating in a 5 mg / mL crosslinking agent (1,5-bis-azido-3-oxapentane) solution for 48 hours and then blow it dry;

[0052] (4) Place the coating containing the crosslinking agent in an environment with a humidity of 75% for 24 hours to obtain a transparent and smooth coating prepared on the surface of the silicon wafer;

[0053] (5) placing the coating obtained in step (4) under 265nm ultraviolet light conditions for 15 minutes to realiz...

Embodiment 4

[0056] (1) Dissolving 30wt% N-isopropylacrylamide, 30wt% sodium alginate and 1wt% photoinitiator I-2959 in water to obtain a photoreactive mixed solution;

[0057] (2) Take 50 μL of the mixed solution and add it dropwise on the surface of a hydrophilic treated silicon wafer (1cm×1cm×1mm), and then cover the surface of the droplet with a cleaned hydrophilic quartz wafer (2cm×2cm×1mm), and place it in a UV Under light irradiation for 20 minutes, the preparation of in-situ polymerized polyacrylic acid / chitosan coating is realized;

[0058] (3) Soak the prepared coating in a 5 mg / mL crosslinking agent (1,5-bis-azido-3-oxapentane) solution for 48 hours and then blow it dry;

[0059] (4) Place the coating containing the crosslinking agent in an environment with a humidity of 75% for 24 hours to obtain a transparent and smooth coating prepared on the surface of the silicon wafer;

[0060] (5) placing the coating obtained in step (4) under 365nm ultraviolet light conditions for 35 mi...

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Abstract

The invention discloses a polymer coating with a layered porous structure based on in-situ polymerization and a preparation method thereof. The preparation method of the polymer coating with the layered porous structure based on in-situ polymerization comprises the following steps of (1) dissolving a monomer containing double bonds in a polyelectrolyte solution, dropwise adding on the surface of a substrate I, covering a substrate II on liquid drops, and performing in-situ polymerization to obtain a polyelectrolyte coating; (2) soaking the polyelectrolyte coating in a solution of a photo-crosslinking agent, and standing the coating in a dark and humid environment to obtain a flat and compact coating; and (3) performing inner layer crosslinking on the coating after standing under standing wave optics, and soaking in an acid or alkali solution to obtain the polymer coating. According to the preparation method of the polymer coating with the layered porous structure based on in-situ polymerization, the polyelectrolyte coating is prepared through in-situ polymerization, layered cross-linking in the coating is achieved by endowing the coating with the secondary cross-linking capacity, and meanwhile the coating with the layered porous structure is rapidly and efficiently prepared through the micro-phase separation capacity of polyelectrolyte in a non-cross-linked area in the acid / alkali environment.

Description

technical field [0001] The invention relates to the field of functional coatings, in particular to a layered porous polymer coating based on in-situ polymerization and a preparation method thereof. Background technique [0002] Porous coatings have a wide range of applications in the fields of drug delivery, catalysis, photonic crystals, separation, wettability, sound insulation and heat insulation. Among them, the pore structure plays a crucial role in the realization of material functionalization. For example, the presence of holes affects the slow-release performance of the coating; the preparation of regular holes endows the material with special photoelectric properties; the aspect ratio of the holes affects the permeability of the material. Therefore, the regulation of the microporous structure in porous coatings is the key to the preparation of functionalized porous coatings. [0003] Regular layered porous structures widely exist in nature and endow organisms with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D3/06B05D3/10B05D1/38B05D7/24C09D133/02C09D179/02C09D133/26C09D105/08C09D105/04C09D133/24
CPCB05D5/00B05D3/107B05D1/38B05D3/067B05D7/54B05D7/24C09D133/02C09D179/02C09D133/26C09D105/08C09D105/04C09D133/24B05D2203/30
Inventor 计剑任科峰黄威嫔汪璟
Owner ZHEJIANG UNIV
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