A hydrogel sensing membrane capable of sequentially detecting anions, metal cations and dye molecules and its preparation method

A metal cation, sequential detection technology, applied in the direction of material analysis, material analysis, measurement device using sonic/ultrasonic/infrasonic waves, and can solve problems such as no discovery

Active Publication Date: 2022-01-25
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the bottleneck problem faced in the application process of hydrogel is how to use the characteristics of the hydrogel network structure to easily introduce functional groups to expand the functional applications of hydrogel films such as sensing and detection applications, so the development of functional detection sensor The applied hydrogel has always been a research hotspot
There are no literature or patent reports about this kind of hydrogel sensing membrane with sequential detection of anions, metal cations and dye molecules and its preparation method

Method used

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  • A hydrogel sensing membrane capable of sequentially detecting anions, metal cations and dye molecules and its preparation method
  • A hydrogel sensing membrane capable of sequentially detecting anions, metal cations and dye molecules and its preparation method
  • A hydrogel sensing membrane capable of sequentially detecting anions, metal cations and dye molecules and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Organic monomer acrylamide (60wt%), photoinitiator Irgacure 2959 (1.0mol% of organic monomer), crosslinking agent N, N'-methylenebisacrylamide (0.03mol of organic monomer %) and the molecular weight of water-soluble short-chain chitosan is 5KDa, deacetylation degree 85% (40wt%) joins in the water of 15mL, forms transparent solution under heating and stirring at 60 ℃ then, blows nitrogen gas deoxygenation 5 minutes then through uniform The glue machine spin-coated the surface of the gold-plated electrode on the quartz wafer to form a film (the homogenization time was 30 seconds, and the rotation speed was 2000rpm), and then irradiated with ultraviolet light (150W) for 20 minutes to form a polyacrylamide / chitosan composite hydrogel.

[0037] (2) Then, the quartz wafer of the spin-coated polyacrylamide / chitosan composite hydrogel film is connected to the flow cell of the quartz crystal microbalance, and the sodium phosphate solution is passed through the quartz wafer su...

Embodiment 2

[0042] (1) organic monomer methacrylamide and N,N-dimethylacrylamide (61wt%), photoinitiator Irgacure 2959 (1.2mol% of monomer), crosslinking agent glutaraldehyde (monomer 0.035mol%) and water-soluble short-chain chitosan with a molecular weight of 10KDa and a deacetylation degree of 86% (39wt%) were added to 15mL of water, and then heated and stirred at 65°C to form a transparent solution, followed by nitrogen gas deoxygenation for 5 minutes Spin coating on different substrates such as quartz wafer gold-plated electrodes, silicon chips or mica sheets through a homogenizer to form a film (the homogenization time is 40 seconds, the rotation speed is 2500rpm), and then irradiated with ultraviolet light (150W) for 30 minutes to form poly(formazan Acrylamide-co-N,N-dimethylacrylamide) / chitosan composite hydrogel.

[0043] (2) Then, the quartz wafer spin-coated with poly(methacrylamide-co-N,N-dimethylacrylamide) / chitosan composite hydrogel film was connected to the flow cell of the...

Embodiment 3

[0048] (1) organic monomer N-tert-butylacrylamide (62wt%), photoinitiator Irgacure 2959 (1.4mol% of monomer), crosslinking agent ethylene glycol dimethacrylate (0.04mol% of monomer) %) and the molecular weight of water-soluble short-chain chitosan is 12KDa, deacetylation degree 87% (38wt%) joins in the water of 15mL, forms transparent solution under heating and stirring at 60 ℃ then, blows nitrogen to deoxygenate 5 minutes then through uniform The glue machine spin-coats the surface of different substrates such as quartz wafer gold-plated electrodes, silicon wafers or mica sheets to form a film (uniform glue time 50 seconds, speed 3000rpm), and then irradiates with ultraviolet light (150W) for 30 minutes to form poly N-tert-butyl acrylamide / chitosan composite hydrogel.

[0049] (2) Then, the quartz wafer of spin-coating polyN-tert-butylacrylamide / chitosan composite hydrogel film is connected to the flow cell of quartz crystal microbalance, sodium nitrate solution is passed thr...

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Abstract

The invention discloses a hydrogel sensing membrane capable of sequentially detecting anions, metal cations and dye molecules and a preparation method thereof, belonging to the field of polymer hydrogel materials. The invention flexibly adjusts the chitosan structure and the sensing properties of anions, metal cations and dye molecules by adjusting the chitosan molecular weight and action time (soaking time) in situ. Chitosan / polyacrylamide composite hydrogels were firstly prepared, and then post-crosslinked using different anion solutions to generate rigid chitosan ionic networks, then crosslinked using metal cation solutions, and then reduced by alkaline solutions to obtain chitosan The sugar / polyacrylamide / inorganic particle composite hydrogel finally adsorbs dye molecules, thus obtaining a hybrid chitosan / polyacrylamide ion-covalent double cross-linked network hydrogel film. It has broad application prospects in the fields of sensors and capacitors.

Description

technical field [0001] The invention belongs to the field of polymer hydrogel materials, and in particular relates to a hydrogel sensing membrane capable of sequentially detecting anions, metal cations and dye molecules, a preparation method and application thereof. The hydrogel sensing membrane for highly sensitive detection of anions, metal cations and dye molecules is obtained through the preparation method. Background technique [0002] As we all know, polymer hydrogel is a three-dimensional cross-linked network structure, which is insoluble in water, but can swell in water. It has great application prospects in controlled release, tissue regeneration and biosensors. However, the bottleneck problem faced in the application process of hydrogel is how to use the characteristics of the hydrogel network structure to easily introduce functional groups to expand the functional applications of hydrogel films such as sensing and detection applications, so the development of fun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C08J5/18C08J3/075C08F251/00C08F220/56C08F220/54C08F220/58G01N29/02
CPCC08J7/04C08J5/18C08J3/075C08F251/00G01N29/022G01N2291/022C08J2351/02C08F220/56C08F220/54C08F220/58
Inventor 曹峥张成闻晓倩成骏峰戴彦恺游兴华翟祥祥吴盾刘春林
Owner CHANGZHOU UNIV
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