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Method for preparing nano composite hydrogel with magnetic function

A nanocomposite and hydrogel technology, which is applied in the field of nanocomposite hydrogel preparation, can solve the problems of single function and insufficient magnetic response, and achieve the advantages of wide source of raw materials, low cost, good stability and intelligent responsiveness Effect

Inactive Publication Date: 2012-05-02
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing a nanocomposite hydrogel with magnetic functions. The method is simple in process and low in cost, and the obtained magnetic nanocomposite hydrogel has excellent magnetic response properties. In addition, the The method has a wide selection range of raw materials, overcomes the defects of single functionality and insufficient magnetic response of ordinary nanocomposite hydrogels, and has high application value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Add 1.5g of inorganic clay Laponite XLS to 30g of deionized water, stir well and add 6.39g of acrylamide, 0.06g of potassium persulfate, 0.01g of N,N,N',N',-tetramethylethylenediamine into a clay aqueous solution to obtain a transparent pre-polymerization solution, and then inject the pre-polymerization solution into a glass tube with a length of 40 mm and a diameter of 6 mm, and polymerize at 25° C. for 48 hours to obtain a nanocomposite hydrogel.

[0029] (2) 10gFeCl 2 4H 2 O and 20gFeCl 3 ·6H 2 O is completely dissolved in 100g deionized water, and N 2 30min to remove residual O in the solution 2 , add 5g of nanocomposite hydrogel, and soak for 24 hours at 25°C. Configure 100mL of 1mol / L sodium hydroxide solution, put into the soaked gel, and react in a closed reactor for 5 hours, and the whole process is carried out under N 2 In the atmosphere, the nanocomposite hydrogel with magnetic function is prepared.

Embodiment 2

[0031] (1) Add 4.5g of inorganic clay Laponite XLS to 30g of deionized water, and after fully stirring, add 10.65g of acrylamide, 0.1g of potassium persulfate, and 0.01g of azobisisobutyronitrile into the clay solution to obtain a transparent prepolymerized Then inject the pre-polymerization solution into a glass tube with a length of 40mm and a diameter of 6mm, and polymerize at 25°C for 24 hours to obtain a nanocomposite hydrogel.

[0032] (2) 10gFeCl 2 4H 2 O and 20gFeCl 3 ·6H 2 O is completely dissolved in 100g deionized water, and N 2 30min to remove residual O in the solution 2 , add 5g of nanocomposite hydrogel, and soak for 48 hours at 25°C. Configure 100mL of 1mol / L sodium hydroxide solution, put into the soaked gel, and react in a closed reactor for 5 hours, and the whole process is carried out under N 2 In the atmosphere, the nanocomposite hydrogel with magnetic function is prepared.

Embodiment 3

[0034] (1) Add 0.15g inorganic clay Laponite XLG in 30g deionized water, after fully stirring, 2.13g acrylamide, 0.02g ammonium persulfate, 0.01g triethanolamine are added to the aqueous solution of clay to obtain a transparent prepolymerized liquid, and then The pre-polymerization solution was injected into a glass tube with a length of 40 mm and a diameter of 6 mm, and polymerized at 25° C. for 96 hours to obtain a nanocomposite hydrogel.

[0035] (2) 5gFeCl 2 4H2 O and 10gFeCl 3 ·6H 2 O is completely dissolved in 100g deionized water, and N 2 30min to remove residual O in the solution 2 , add 5g of nanocomposite hydrogel, and soak for 24 hours at 25°C. The whole process is in N 2 In the atmosphere, configure 100mL of 1mol / L sodium hydroxide solution, put the soaked gel, and react in a closed reactor for 2 hours to prepare a nanocomposite hydrogel with magnetic function.

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Abstract

The invention relates to a method for preparing nano composite hydrogel with magnetic function. The method comprises the following steps of: (1) adding inorganic clay into deionized water, stirring to completely strip the clay, adding a water-soluble monomer, an initiator and a catalyst, mixing uniformly to obtain a prepolymer solution, and polymerizing the obtained prepolymer solution at the temperature of between 5 and 30 DEG C for 24 to 120 hours to obtain nano composite hydrogel; and (2) dissolving a bivalent iron salt and a trivalent iron salt into deionized water, adding 1 to 10 grams of the nano composite hydrogel, soaking for 24 to 120 hours at the temperature of between 5 and 30 DEG C under the protection of nitrogen to obtain soaked hydrogel, preparing 0.5 to 5mol / L co-precipitator, adding the soaked hydrogel, reacting for 1 to 12 hours under the protection of nitrogen, and thus obtaining the nano composite hydrogel with magnetic function. The preparing method is simple, wide in raw material source and low in cost; and the obtained nano composite hydrogel has excellent magnetic performance and high application value.

Description

technical field [0001] The invention belongs to the field of preparation of nanocomposite hydrogel, in particular to a preparation method of nanocomposite hydrogel with magnetic function. Background technique [0002] Polymer hydrogel is a multi-component system composed of three-dimensional polymer network and solvent water. After absorbing a large amount of water, it can cause macroscopic changes in the polymer network. Hydrogels have the properties of a solid that cannot flow macroscopically, and have a solution-like behavior microscopically, which can swell in water but not dissolve. Although the water in the hydrogel is bound in the gel network, it still has certain mobility, which is similar to the structure of living organisms and has good biocompatibility. The organic / inorganic nanocomposite hydrogel introduces nanoscale inorganic clay as physical cross-linking points in the three-dimensional network, and forms a three-dimensional network structure through the non-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/26C08L33/24C08L33/02C08K3/22C08F120/56C08F120/54C08F120/06C08F2/44C08K3/34
Inventor 朱美芳夏梦阁贾朦朦武永涛刘晟张冀
Owner DONGHUA UNIV
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