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Layered porous polyelectrolyte coating and preparation method thereof

A polyelectrolyte and coating technology, applied in the field of layered porous polyelectrolyte coating and its preparation

Inactive Publication Date: 2021-08-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no method for the preparation of layered porous structures in polyelectrolyte coatings by simple means.

Method used

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  • Layered porous polyelectrolyte coating and preparation method thereof
  • Layered porous polyelectrolyte coating and preparation method thereof
  • Layered porous polyelectrolyte coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The scanning electron microscope picture of embodiment 1 is as figure 1 shown by figure 1 It can be seen that the flat and dense polypropyleneimine and modified polyacrylic acid coatings before acid treatment on the left will form the microporous structure in the picture on the right after layered crosslinking and acid treatment, and the microporous structure Distributed in layers. This is mainly due to the strong movement ability of the molecular chains in the uncrosslinked region, which is prone to microphase separation in acid solution or alkaline solution to form a pore structure, while the movement ability of the molecular chains of the crosslinked layer is limited, maintaining a flat and compact state, by This enables the preparation of layered porosity.

Embodiment 2

[0047] (1) Dissolve heparin and 4-aminobenzophenone in water, under the catalysis of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and N-hydroxysulfosuccinimide After reacting for 48 hours, a modified heparin with a grafting rate of 5% was obtained.

[0048] (2) Soak the cleaned silicon wafer (2cm×2cm×1mm) in polydiallyldimethylamine aqueous solution (1mg / mL, pH 10.0) for 30 minutes, take it out, wash it three times with ultra-clean water Blow dry with nitrogen; then soak it in modified heparin aqueous solution (5mg / mL, pH 4.0) for 30 minutes, take it out, wash it with ultra-clean water three times, and then blow dry with nitrogen to complete the coating of one deposition cycle. Layer preparation; the above steps were repeated to complete 20 deposition cycles of coating preparation on the substrate.

[0049] (3) placing the coating prepared in step (2) in a humid and dark environment (100% relative humidity) for 36 hours to obtain a smooth and dense polydiallyldimethylamine / m...

Embodiment 3

[0054] (1) Dissolve polymethacrylic acid and 4-azidoaniline in water at a molar ratio of 30:1, and in 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and N-hydroxysulfur Under the catalysis of substituted succinimide, react for 72 hours to obtain modified polymethacrylic acid.

[0055] (2) Soak the cleaned glass sheet (2cm×2cm×1mm) in polyethyleneimine aqueous solution (3mg / mL, pH 9.0) for 20 minutes, take it out, wash it with ultra-clean water three times, and blow it dry with nitrogen; Then put it into the modified polymethacrylic acid aqueous solution (3mg / mL, pH 3.0) and soak it for 20 minutes, take it out, wash it with ultra-clean water three times, and blow it dry with nitrogen gas, so as to complete the coating of one deposition cycle. Preparation; repeat the above steps to complete 8 deposition cycles of coating preparation on the substrate.

[0056] (3) placing the coating prepared in step (2) in a humid dark environment (100% relative humidity) for 48 hours to obtain ...

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Abstract

The invention relates to the field of functional coatings, in particular to a layered porous polyelectrolyte coating and a preparation method thereof. The preparation method comprises the following steps: modifying a photo-crosslinking group on the surface of polyelectrolyte I to obtain modified polyelectrolyte; sequentially and alternately depositing a substrate with a modified polyelectrolyte aqueous solution and a polyelectrolyte II aqueous solution; leaving the coating standstill in a humid and dark environment to obtain a flat and compact coating; finally, performing inner layered crosslinking on the coating under standing wave optics, and soaking the coating in an acid solution or an alkali solution to obtain the layered porous polyelectrolyte coating. Layered crosslinking in the photo-crosslinkable coating is realized by utilizing the standing wave optics, and meanwhile, the layered porous coating is quickly and efficiently prepared by utilizing the capability of separating polyelectrolyte microphase in a non-crosslinked area in an acid environment. Preparation of a structural color pattern is realized, the structural regulation performance of the coating is greatly improved, and the application range of materials is expanded.

Description

technical field [0001] The invention relates to the field of functional coatings, in particular to a layered porous polyelectrolyte coating and a preparation method thereof. Background technique [0002] Porous coatings have a wide range of applications in the fields of drug delivery, catalysis, separation, sound insulation and heat insulation. Among them, the pore structure plays a crucial role in the realization of material functionalization. For example, the curvature of the hole will affect the liquid penetration; opening or not has a significant difference in the sound insulation effect; the size and distribution of the hole will affect the heat transfer path 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 special properties. For example, nacre is composed of organic poro...

Claims

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Application Information

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IPC IPC(8): B05D5/06B05D7/24B05D7/00B05D3/06B05D1/18B05D1/36C09D133/02C09D105/10
CPCB05D5/06B05D7/24B05D7/58B05D3/06B05D3/067B05D1/18B05D1/36C09D133/02C09D105/10
Inventor 计剑任科峰黄威嫔汪璟
Owner ZHEJIANG UNIV
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