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Preparation method of multi-stimuli-responsive hydrogel layer-by-layer assembly film with multi-component structure

A technique of multi-stimulation and layer-by-layer assembly, applied in the field of chemistry, to achieve the effect of simple preparation method

Active Publication Date: 2018-03-06
NINGXIA MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] At present, the existing stimuli-responsive films mainly focus on single-structure films, or are only responsive to a single external stimulus.
However, combining two different types of stimuli-responsive films (layer-by-layer assembly film and hydrogel film) to construct multiple stimuli-responsive films with multiple structures on the same solid substrate surface has rarely been reported in the literature, especially the hydrogel The film is assembled layer by layer, and the layer-by-layer assembly film of hydrogel has not been reported so far

Method used

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  • Preparation method of multi-stimuli-responsive hydrogel layer-by-layer assembly film with multi-component structure
  • Preparation method of multi-stimuli-responsive hydrogel layer-by-layer assembly film with multi-component structure
  • Preparation method of multi-stimuli-responsive hydrogel layer-by-layer assembly film with multi-component structure

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Embodiment Construction

[0060] Below is a list of {PAH / PAA} 5 / {PAA-PBA / Dex} 5 The / PDEA / PNIPAm composite film is taken as an example to introduce the preparation method of the multi-structure multi-stimulus-responsive hydrogel layer-by-layer assembled film of the present invention in detail.

[0061] 1. Prepare the working electrode PG

[0062] The graphite electrode PG was polished, and then ultrasonically cleaned in secondary water for 30 s. After drying, it could be used as the working electrode used in the experiment.

[0063] 2. Assembling {PAH / PAA} on the surface of the working electrode PG 5 Layer-by-layer assembly of films

[0064]2a. Immerse the working electrode PG in a positively charged polyacrylamine hydrochloride (hereinafter referred to as PAH) solution. The concentration of the PAH solution is 1 mg / mL and the pH value is 8.0. After soaking for 20 minutes, take it out, rinse and dry.

[0065] 2b. Immerse the working electrode PG in step 2a in a negatively charged polyacrylic acid ...

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Abstract

The invention discloses a method for preparing a multiple-structure multi-stimuli-responsive hydrogel layer-by-layer assembled film. The method comprises the following steps: (I) preparing a working electrode; (II) assembling a (PAH / PAA)m layer-by-layer assembled film on the surface of the working electrode PG; (III) assembling a (PAA-PBA / Dex)n layer-by-layer assembled film on the surface of the PG / (PAH / PAA)m electrode; (IV) assembling a PDEA (polydiethylene glycol adipate) hydrogel film on the surface of the PG / (PAH / PAA)m / (PAA-PBA / Dex)n electrode; and (V) assembling a PNIPAm (poly(n-isopropyl acrylamide)) hydrogel film on the surface of the PG / (PAH / PAA)m / (PAA-PBA / Dex)n / PDEA electrode. The method has the beneficial effects that: (1) the method is simple and convenient without complex instrument equipment; (2) two different methods for preparing the film are combined to successfully construct a hydrogel layer-by-layer assembled film having a unique dual structure; and (3) the film has the stimuli-responsive property to the pH value of the environment, fructose molecules, salt, temperature and methanol.

Description

technical field [0001] The invention relates to a method for preparing a thin film, in particular to a method for preparing a layer-by-layer assembled thin film of a multi-structure multi-stimulus-responsive hydrogel, belonging to the technical field of chemistry. Background technique [0002] There are many preparation methods for polymer films, such as coating method, in-situ chemical polymerization method, grafting method, self-assembly method, Langmuir-Blodgett (LB) film method, sol-gel method, electrochemical polymerization method, layer Layer assembly method and spin coating method, etc. [0003] Layer-by-layer assembly (LbL for short) technology is a relatively new thin-film preparation method developed in the 1990s. Due to its simple operation and good controllability at the nanometer level, the layer-by-layer assembly technology has attracted more and more attention, and there are many reports on its basic research and applied research. [0004] At present, LbL fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/333
CPCG01N27/333
Inventor 姚惠琴曹菊琴闫乾顺朱彦姝甘倩倩郑志祥
Owner NINGXIA MEDICAL UNIV