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Preparation method of microgel composite hydrogel

A composite hydrogel and microgel technology, which is applied in the field of polymers, can solve the problems of complex preparation process and achieve the effect of simple preparation process and excellent mechanical properties

Inactive Publication Date: 2010-07-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using microgels containing double bonds to prepare microgel composite hydrogels, it is necessary to prepare microgels containing double bonds by chemical modification on the basis of reactive microgels, which makes the whole preparation process very complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In a 500ml flask, add 45g acrylamide, 4g AMPS, 4g N-methylol acrylamide, 0.05g dipropylene, 56ml water, add 2.5g OP-10, 7.5g SP80, stir well, add 110ml Cyclohexane was purged with nitrogen for 20 minutes, and then 0.005 g of ammonium persulfate and 0.01 g of sodium bisulfite were added as initiators, and the reaction was carried out for 3 hours to obtain an N-methylol-containing microgel emulsion. 8.5 grams of the emulsion was dried and redispersed in 47 grams of water. Take 10g of dispersion liquid into a 150ml beaker, add 20g of acrylamide, 5g of AMPS, 65ml of water, stir and dissolve for 10 minutes to form a prepolymer solution, drive oxygen for 20 minutes, add 0.008g of ammonium persulfate and 0.008g of hydrogen sulfite sodium. The base polymer was obtained by polymerizing at room temperature for 5 hours, and the base polymer was treated at 99° C. for 10 minutes and 90° C. for 1.5 hours.

[0041] The water content of the gel was calculated using the following form...

Embodiment 2

[0048] In a 500ml flask, add 40g acrylamide, 6g AMPS, 7g N-methylol acrylamide, 0.04g dipropylene, 56ml water, add 2.5g OP-10, 7.5g SP80, stir well, add 110ml Cyclohexane was purged with nitrogen for 20 minutes, then 0.005 g of potassium persulfate and 0.01 g of sodium bisulfite were added as initiators, and the reaction was carried out for 3 hours to obtain an N-methylol-containing microgel emulsion. 8.5 grams of the emulsion was dried and redispersed in 47 grams of water. Take 5g of dispersion liquid into a 150ml beaker, add 25g of acrylamide, 2g of AMPS, 68ml of water, stir and dissolve for 10 minutes to form a prepolymer solution, drive oxygen for 25 minutes, add 0.012g of potassium persulfate and 0.012g of hydrogen sulfite sodium. The base polymer was obtained by polymerizing at room temperature for 4 hours, and the polymer was treated at 99°C for 10 minutes and at 90°C for 4.5 hours.

[0049] The performance test is the same as in Example 1, and the results are as foll...

Embodiment 3

[0052] In a 500ml flask, add 42g acrylamide, 5g AMPS, 6g N-methylol acrylamide, 0.03g dipropylene, 56ml water, add 2.5g OP-10, 7.5g SP20, stir well, add 110ml Cyclohexane was purged with nitrogen for 20 minutes, then 0.005 g of ammonium persulfate and 0.02 g of sodium bisulfite were added as initiators, and the reaction was carried out for 3 hours to obtain an N-methylol-containing microgel emulsion. 8.5 grams of milk was dried and re-dispersed in 47 grams of water. Take 14g of dispersion liquid in a 150ml beaker, add 20g of acrylamide, 4g of AMPS, 62ml of water, fully stir and dissolve for 10 minutes to form a prepolymer solution, drive oxygen for 20 minutes, add 0.005g of ammonium persulfate and 0.005g of hydrogen sulfite sodium. The base polymer was obtained by polymerizing at room temperature for 5 hours, and the polymer was treated at 89° C. for 4 hours.

[0053] The performance test is the same as in Example 1, and the results are as follows:

[0054] Tensile strength...

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Abstract

The invention belongs to the technical field of polymer, and relates to a preparation method of microgel composite hydrogel, which comprises the following steps: preparing solution containing N-hydroxymethyl, preparing dispersion solution, preparing prepolymerization solution, polymerization and heating and crosslink at high temperature. Acrylamide is adopted as a main monomer, N-methylol acrylamide is used as a functional monomer, the prepared microgel dispersion solution containing the N-hydroxymethl is adopted as a potential crosslink agent, and then the microgel composite hydrogel is prepared with a method of first polymerization and later high-temperature processing and crosslink. The method is free from adopting chemical modifier to obtaining the microgel containing the potential crosslink point, so the preparation process of the microgel composiste hydrogel is simpler, and the mechanical performance of the prepared hydrogel is excellent.

Description

Technical field: [0001] The invention belongs to the technical field of polymers, and in particular relates to a preparation method of a microgel composite hydrogel. Background technique: [0002] Hydrogel is a functional polymer material with a three-dimensional network structure, which can absorb water and swell but is insoluble in water, and has good water retention performance and biocompatibility. It can be widely used in many fields such as medicine, medical treatment, health care, construction, agriculture, forestry and horticulture, irrigation and water saving, soil improvement, petrochemical industry, sewage treatment and tissue engineering. Conventional hydrogels greatly limit their applications due to their poor mechanical strength. Traditional hydrogels are prepared from small-molecule chemical cross-linking agents such as N,N′-methylenebisacrylamide. Due to the disordered distribution of cross-linking points in the system, the chain lengths are different, so t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08F220/56C08F220/58C08J3/075
Inventor 赵芳秦绪平
Owner SHANDONG UNIV
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