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A method for the rapid preparation of bilayer hydrogels using laser-induced continuous front-end polymerization of oil-water two-phase

A front-end polymerization and hydrogel technology, applied in the field of preparation of functional polymer materials, to achieve high application value and short polymerization reaction time

Active Publication Date: 2017-06-09
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has been no report on the preparation of bilayer hydrogel materials by laser-induced oil-water two-phase continuous front-end polymerization.

Method used

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  • A method for the rapid preparation of bilayer hydrogels using laser-induced continuous front-end polymerization of oil-water two-phase
  • A method for the rapid preparation of bilayer hydrogels using laser-induced continuous front-end polymerization of oil-water two-phase

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Take by weighing 33g hydroxypropyl acrylate, 5g ethylene glycol dimethacrylate, 20g perfluoroalkyl ethyl methacrylate and dissolve in 38.0g N,N'-dimethylformamide to form a homogeneous solution, then Add 4g of ammonium persulfate to form a uniform oil phase solution; weigh 60.0g of hydroxyethyl acrylate, 0.5g of ethylene glycol dimethacrylate, and 20.25g of N-vinylpyrrolidone dissolved in 4.0g of water and 15g of glycerin. Mixed solvent made into a uniform solution, and then add 0.25g of potassium persulfate, made into a uniform aqueous solution. Pour the oil phase solution and aqueous solution into the reactor at the same volume ratio, adjust the initiation distance to 1.6m, turn on the UV laser switch and adjust the current to 6mA to initiate the polymerization reaction, and the laser initiation time is 6s. Turn off the laser switch, and complete the polymerization of the monomer by means of the thermal autocatalysis of the exothermic reaction. The schematic diagram i...

Embodiment 2

[0025] Weigh 30.0g of trimethylolpropane triacrylate, 1g of N,N'-methylenebisacrylamide, 23g of perfluoroalkylethyl methacrylate dissolved in 45.0g of glycerin to make a uniform solution, then add 1g Potassium persulfate, made into a uniform oil phase solution; weigh 45.0g trifluoroethyl methacrylate, 0.5g ethylene glycol dimethacrylate, 21.5g N-methylolacrylamide dissolved in 2.0g water and 28g of glycerin in a mixed solvent to prepare a uniform solution, and then add 3g of benzoyl peroxide to form a uniform aqueous solution. Pour the oil phase solution and aqueous solution into the reactor according to the same volume ratio, adjust the initiation distance to 8m, turn on the switch of the carbon dioxide laser reactor and adjust the current to 12mA to initiate the polymerization reaction, and the laser initiation time is 16s. The laser switch is turned off, and the monomer polymerization is completed by means of thermal autocatalysis of the exothermic reaction. After drying, ...

Embodiment 3

[0027] Weigh 60.0g of hydroxypropyl methacrylate, 3g of divinylbenzene, 21.4g of N-vinylcaprolactam and dissolve in 15.0g of 1-methyl-2-pyrrolidone to make a uniform solution, then add 0.6g of tert-butyl peroxide Hydrogen, made into a uniform oil phase solution; weigh 20.0g fluoroalkane methacrylate, 1g divinylbenzene, 36.2g hydroxypropyl acrylate and dissolve in a mixed solvent composed of 10.0g water and 30g dimethyl sulfoxide Make a uniform solution, then add 2.8g of azobisisobutyronitrile to make a uniform aqueous solution. Pour the oil phase solution and aqueous solution into the reactor according to the same volume ratio, adjust the initiation distance to 18m, turn on the infrared solid-state laser reactor switch and adjust the current to 40mA to initiate the polymerization reaction, and the laser initiation time is 56s. The laser switch is turned off, and the monomer polymerization is completed by means of thermal autocatalysis of the exothermic reaction. After drying,...

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Abstract

The present invention adopts laser-induced oil-water two-phase continuous front-end polymerization to rapidly prepare a double-layer hydrogel method, and acrylic monomers, vinyl monomers, initiators and crosslinking agents are respectively dissolved in organic solvents and aqueous phase solvents , to make a uniform oil phase solution and water phase solution; then move the oil phase and water phase solution into the reactor according to the same volume ratio to form a layered oil-water two-phase solution, and use laser treatment on the upper end of the reactor to initiate polymerization; close Laser reactor until all raw materials in the entire reactor are converted into hydrogel; finally, the hydrogel is dried to obtain a double-layer hydrogel. The present invention does not require an external heat source to maintain the polymerization of the entire system during the polymerization reaction process, and is controllable, and the polymerization reaction time is short, energy-saving, and pollution-free; the continuous polymerization between oil and water phases is realized, and it is used for the preparation of hydraulic coagulation with different properties. Glue provides a method and has high application value in industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional polymer materials, in particular to a method for rapidly preparing double-layer hydrogels by adopting laser-induced oil-water two-phase continuous front-end polymerization. Background technique [0002] Hydrogel material is a new type of functional polymer material with a hydrophilic group, which can absorb a large amount of water in water, swell and maintain a certain amount of water but is insoluble in water. It has a three-dimensional network structure and has both solid and liquid properties. Due to the advantages of good physical and chemical properties and excellent biological properties of hydrogel materials, hydrogels have broad application prospects in the fields of biomedicine, tissue engineering, agriculture, forestry, and industry. [0003] Double-layer hydrogel materials are produced by dissolving monomers with different properties in organic solvents and water phase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08J3/24C08L33/14C08L33/16C08L35/02C08L33/26C08L33/24C08F220/28C08F222/14C08F220/24C08F226/10C08F222/38C08F220/22C08F220/58C08F212/36C08F226/06C08F220/56C08F220/06C08F2/46
Inventor 陈苏张万超刘思思
Owner NANJING TECH UNIV