A kind of preparation method of anti-drying and anti-freezing hydrogel

A technology of gel and frozen water, which is applied in the direction of chemical reaction of materials, and material analysis by observing the influence of chemical indicators. It can solve problems such as limited use, and achieve uniform distribution, simple operation, and experimental short cycle effect

Active Publication Date: 2022-02-01
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thereby solving the problem that hydrogel-based detection devices inhibit ion transmission due to freezing below zero or dehydration and drying in dry environments, thus limiting their use in low temperature and dry environments

Method used

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  • A kind of preparation method of anti-drying and anti-freezing hydrogel
  • A kind of preparation method of anti-drying and anti-freezing hydrogel
  • A kind of preparation method of anti-drying and anti-freezing hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] a. Dissolving acrylamide monomer in solvent water to prepare acrylamide monomer solution with a mass fraction of 1%;

[0028] b. Dissolving the cross-linking agent N,N'-methylenebisacrylamide in water to form a N,N'-methylenebisacrylamide crosslinking agent solution with a mass fraction of 1g / L;

[0029] c. Under magnetic stirring, drop 784 μl of the N,N'-methylenebisacrylamide crosslinking agent solution obtained in step b into 20 ml of the acrylamide monomer solution obtained in step a, keep stirring for 10 minutes, and add acrylamide 0.1% initiator tetramethylethylenediammonium based on monomer mass fraction and 0.1% additive clay based on acrylamide monomer mass fraction, continue stirring for 20 minutes, then add acrylamide monomer mass fraction 1% of moisturizing molecular sulfuric acid;

[0030] d. According to the addition of tetramethylethylenediammonium initiator, select the ultraviolet light with a wavelength of 365nm for 30 minutes to carry out photopolymer...

Embodiment 2

[0033] a. Dissolving the N-(isobutoxy)methacrylamide monomer in a solvent to form a 50% N-(isobutoxy)methacrylamide monomer solution by mass fraction;

[0034] b. Dissolving the N,N'-diisopropylcarbodiimide crosslinking agent in water to form a N,N'-diisopropylcarbodiimide crosslinking agent solution with a mass fraction of 20g / L;

[0035] c. Under magnetic stirring, drop 784 μl of the N,N'-diisopropylcarbodiimide crosslinking agent solution obtained in step b into the N-(isobutoxy)methacrylamide monomer obtained in step a In 20ml of the solution, keep stirring for 10min, add 1% ammonium persulfate initiator based on the mass fraction of N-(isobutoxy)methacrylamide monomer and N-(isobutoxy)methacrylamide 10% polyethylene glycol (PEG) additive based on the mass fraction of the amide monomer, after continuing to stir for 20 minutes, add 40% of the moisturizing agent based on the mass fraction of N-(isobutoxy) methacrylamide monomer sex molecule phosphoric acid;

[0036] d. Acc...

Embodiment 3

[0039] a. Dissolving the methacrylamide monomer in a solvent to prepare a methacrylamide monomer solution with a mass fraction of 10%;

[0040] b. Dissolving the N,N'-methylenebisacrylamide crosslinking agent in water to form a N,N'-methylenebisacrylamide crosslinking agent solution with a mass fraction of 12g / L;

[0041] c. Under magnetic stirring, drop 784 μl of the N,N'-methylenebisacrylamide crosslinking agent solution obtained in step b into 20 ml of the methacrylamide monomer solution obtained in step a, keep stirring for 10 minutes, and add 1% sodium bisulfite initiator based on the mass fraction of methacrylamide monomer and 8% polyvinyl alcohol (PVA) additive based on the mass fraction of methacrylamide monomer, after continuing to stir for 20min, add 20% moisturizing molecular acrylic acid based on the mass fraction of methacrylamide monomer;

[0042] d. According to the addition of sodium bisulfite initiator, select a UV light with a wavelength of 254nm to illuminate...

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Abstract

A method for preparing an anti-drying anti-freeze hydrogel according to the present invention, the method is made of monomers, solvents, crosslinking agents, initiators, additives and hygroscopic molecules, and the anti-freezing hydrogel obtained by the method of the present invention Dry antifreeze hydrogel, the anti-freeze performance is that it can still maintain elasticity after being left open at room temperature for 1-7 months in a dry environment with a humidity of 11%-13%RH. After drying for 1‑7 days, it still does not freeze and maintains good elasticity. The anti-drying antifreeze hydrogel is used to load the explosive detection reagent, which is directly used to detect the corresponding explosive particles or liquid. Thereby solving the problem that the hydrogel-based detection device inhibits ion transmission due to freezing below zero or losing water when used in a dry environment, thereby limiting its use in low temperature and dry environments.

Description

technical field [0001] The invention belongs to the field of material preparation and specifically provides a method for preparing an anti-drying and anti-freeze hydrogel. Background technique [0002] Hydrogel-based detection substrates, because of the water-rich properties of hydrogels, have been widely used in drug delivery, sensor construction, tissue engineering, soft electronics and other fields. However, due to the large amount of dissolved water, conventional hydrogels inevitably freeze at sub-zero temperatures and dry out when used in dry environments, thereby limiting the transport of ions, which fundamentally limits their use as detection substrates at low temperatures and Use in dry environments. The current research on the antifreeze and anti-drying properties of hydrogels is mainly to add antifreeze agents, such as glycerin and ethylene glycol, etc. (Angewandte Chemie International Edition2018, 57, 6568-6571). Chinese patent (CN 108329497A) describes an antif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F222/38C08F220/58C08F220/54C08F220/06C08F120/58C08F120/56C08F2/50C08F2/44C08K3/30C08K3/32C08K5/09C08K5/053G01N21/78
CPCC08F220/56C08F220/54C08F120/58C08F120/56C08F222/385C08F220/58C08F2/50C08F2/44C08K3/30C08K3/32C08K5/09C08K5/053G01N21/78C08K2003/309C08K2003/329C08F220/06
Inventor 窦新存王培贤王广发蔡珍珍
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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