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Preparation of nano composite gel with organic/inorganic hybrid microspheres as crosslinking points

A hybrid microsphere and nanocomposite technology, used in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of uneven crosslinking density, poor mechanical properties, limited application, etc., and achieve high polymerization efficiency, simple method, raw material Choose from a wide range of effects

Active Publication Date: 2009-09-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, polymer gels are generally formed by chemical cross-linking between molecular chains, resulting in uneven cross-linking density, resulting in stress concentration during stress, and poor mechanical properties, which severely limit its application in various aspects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In 150ml of deionized water, add 7.5g of Laponite XLS clay, stir well and transfer to a place equipped with stirring device, reflux device and N 2 Inlet the three-necked flask, and then place the three-necked flask on an ultrasonic device for ultrasonication for 30min, so that the clay is fully peeled off in the aqueous electrolyte solution, and 75g of styrene dissolved in 1.0g of dibenzoyl peroxide and 4.5g of hexadecane is added dropwise Into the above aqueous solution, pass N 2 And continue to sonicate for 1 hour, then stir and heat to 70-80° C., and polymerize under nitrogen atmosphere for 6-8 hours to prepare organic / inorganic hybrid microspheres. Take 20g of this emulsion and add 5g of acrylamide monomer while stirring, pass N 2 After 30 minutes, add 0.01 g of potassium persulfate and 24 μl of N, N, N', N'-tetramethylethylenediamine, continue to stir for five minutes, and then inject the solution into a glass tube with a length of 400 mm and a diameter of 5.5 mm,...

Embodiment 2

[0029] First configure 150ml of 0.1mol / L NaCl aqueous solution and add 7.5g of Laponite XLS clay, stir well and transfer to a place equipped with stirring device, reflux device and N 2 Inlet the three-necked flask, and then place the three-necked flask on an ultrasonic device for ultrasonication for 30min, so that the clay is fully peeled off in the aqueous electrolyte solution, and 75g of styrene dissolved in 1.0g of dibenzoyl peroxide and 4.5g of hexadecane is added dropwise Into the above aqueous solution, pass N 2 And continue to sonicate for 1 hour, then stir and heat to 70-80° C., and polymerize under nitrogen atmosphere for 6-8 hours to prepare organic / inorganic hybrid microspheres. Take 20g of this emulsion and add 5g of acrylamide monomer while stirring, pass N 2 After 30 minutes, add 0.01 g of potassium persulfate and 24 μl of N, N, N', N'-tetramethylethylenediamine, continue to stir for five minutes, and then inject the solution into a glass tube with a length of 4...

Embodiment 3

[0031] First configure 150ml of 0.2mol / L NaCl aqueous solution and add 7.5g of Laponite XLS clay, stir well and then transfer to a place equipped with stirring device, reflux device and N 2 Inlet the three-necked flask, and then place the three-necked flask on an ultrasonic device for ultrasonication for 30min, so that the clay is fully peeled off in the aqueous electrolyte solution, and 75g of styrene dissolved in 1.0g of dibenzoyl peroxide and 4.5g of hexadecane is added dropwise Into the above aqueous solution, pass N 2 And continue to sonicate for 1 hour, then stir and heat to 70-80° C., and polymerize under nitrogen atmosphere for 6-8 hours to prepare organic / inorganic hybrid microspheres. Take 20g of this emulsion and add 5g of acrylamide monomer while stirring, pass N 2 After 30 minutes, add 0.01 g of potassium persulfate and 24 μl of N, N, N', N'-tetramethylethylenediamine, continue to stir for five minutes, and then inject the solution into a glass tube with a length...

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Abstract

The invention relates to a preparation of nano composite gel with organic / inorganic hybrid microspheres as cross linking points. The preparation comprises the following steps: (1) dissolving clay in 0-0.5mol / L aqueous electrolyte solution, ultrasonically treating after fully stirring, dropwise adding to the clay solution during the ultrasound process, heating to 70-80 DEG C after further ultrasonic treatment for a period, polymerizing in nitrogen atmosphere for 6-8 hours to obtain crosslinking point hybrid microsphere emulsion; and (2) mixing 20g of the crosslinking point hybrid microsphere emulsion with 5-10g of a water soluble monomer, 0.01-0.05g of a water soluble initiator and 8-24mul of a catalyst to obtain prepolymerized solution, polymerizing the prepolymerized solution at the room temperature of 20-30 DEG C for 30-50 hours to obtain the nano composite gel. The preparation has the advantages of simple process and high polymerization rate, the obtained macromolecular microsphere composite gel has excellent mechanical properties, and the method has large raw material range and great application value.

Description

technical field [0001] The invention belongs to the field of preparation of nanocomposite gels, in particular to the preparation of nanocomposite gels with organic / inorganic hybrid microspheres as crosslinking points. Background technique [0002] Polymer gel is a polymer three-dimensional network system composed of polymers and solvents. The system is solvophilic and can be swollen in solvents but not dissolved. It is generally divided into two types: hydrogels using water as solvents and lyogels using organic solvents as solvents. Hydrogel is a viscoelastic body made of swollen and cross-linked hydrophilic polymers with water as a solvent. It is a special soft and wet material. In nature, most living tissues are composed of hydrogels, not only skin, eyes, tissues and organs, but also teeth, bones and nails. Therefore, synthetic hydrogel materials are more similar to living tissue in terms of physical properties than any other synthetic materials, so they are widely used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
Inventor 朱美芳武永涛朱苞蕾范青青俞昊
Owner DONGHUA UNIV
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