High-gel strength, salt resistant amphoteric ion type nano-composite hydrogel and preparing method

A zwitterionic and nanocomposite technology, applied in the field of zwitterionic nanocomposite hydrogel and preparation, can solve the problem of low gel absorption capacity and achieve the effect of high gel strength

Inactive Publication Date: 2008-09-24
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, since the nanocomposite hydrogel prepared by this method only co...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First disperse and strip 3.0g of sodium MMT in 80.0g of deionized water to form a uniform and stable colloidal dispersion; then dissolve 10.0g of anionic monomer sodium acrylate and 20.0g of cationic monomer DMC in deionized water to prepare a mass concentration It is a 50% monomer solution; the monomer solution is added to the aforementioned colloidal dispersion under stirring conditions, and then 0.001g of NMBA and 0.01g of ammonium persulfate are added to prepare a prepolymerization reaction solution;

[0029] The pre-polymerization reaction solution was polymerized under nitrogen at 60°C for 12 hours to obtain a polymerized product, and then the polymerized product was treated at 50°C for 5 days to obtain a zwitterionic nanocomposite hydraulic gel with high gel strength and salt resistance glue.

[0030] The performance results of the composite gel are as follows: gel strength: 198.85mJ / g; absorption multiple of 0.9% NaCl saline solution: 60g / g.

Embodiment 2

[0032] First disperse and strip the sodium MMT of 15.0g in 80.0g deionized water to form a uniform and stable colloidal dispersion; 50% monomer solution; under agitation, the monomer solution is added to the aforementioned colloidal dispersion, and then 0.001g NMBA and 0.01g ammonium persulfate are added to prepare a prepolymerization reaction solution;

[0033] The pre-polymerization reaction solution was polymerized under nitrogen at 60°C for 12 hours to obtain a polymerized product, and then the polymerized product was treated at 50°C for 5 days to obtain a zwitterionic nanocomposite hydraulic gel with high gel strength and salt resistance glue.

[0034] The performance results of the composite gel are as follows:

[0035] Gel strength: 124.58mJ / g Suction weight concentration 0.9% NaCl saline multiple: 90g / g;

Embodiment 3

[0037] First disperse and strip the sodium MMT of 3.0g in 80.0g deionized water to form a uniform and stable colloidal dispersion; 50% monomer solution; under agitation, the monomer solution is added to the aforementioned colloidal dispersion, and then 0.001g NMBA and 0.01g ammonium persulfate are added to prepare a prepolymerization reaction solution;

[0038] The pre-polymerization reaction solution was polymerized at 50°C for 20 hours under nitrogen to obtain a polymerized product, and then the polymerized product was treated at 40°C for 7 days to obtain a high gel strength, salt-resistant zwitterionic nanocomposite hydraulic gel glue.

[0039] The performance results of the composite gel are as follows: gel strength: 24.96mJ / g; absorption weight concentration 0.9%NaCl saline multiple: 110g / g.

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Abstract

The invention relates to high-strength-gel and salt-resistant zwitterionic nano-composite hydrogel and a preparation method thereof. The hydrogel consists of a polymer matrix accounting for 60 to 100 weight percent of the gel and inorganic components accounting for 0 to 40 weight percent of the gel. The preparation method is that prepolymerization reaction solution is firstly prepared; the inorganic components are dispersed and stripped in deionized water to form even and stable colloidal dispersion; and then monomer is dissolved in the deionized water to prepare into monomer solution with 30 percent to 100 percent of mass concentration; when being stirred, the monomer solution is added into the colloidal dispersion, and then a crosslinking agent, an initiator and a catalyst are added in to prepare the prepolymerization reaction solution; under the nitrogen condition and 20 DEG C to 60 DEG C, the prepolymerization reaction solution is polymerized for 12 to 30 hours to obtain a polymerization product; and then the polymerization product is treated for 3 to 7 days under 40 DEG C to 60 DEG C; the mechanical strength of the gel after the obtained hydrogel absorbs water is up to 225mJ/g, and the salt absorbing magnification is up to 140g/g.

Description

technical field [0001] The invention relates to a high gel strength, salt-tolerant zwitterionic nanocomposite hydrogel and a preparation method thereof. Background technique [0002] Polymer hydrogel is a special functional polymer, which has a unique three-dimensional network structure and can absorb a large amount of solvent without losing it easily. This makes it widely used in agriculture, industry, biomedicine and tissue engineering. [0003] However, the poor mechanical strength of hydrogel greatly limits its application. However, relying on increasing the amount of organic cross-linking agent to enhance the gel strength of the hydrogel usually makes the hydrogel very brittle. Therefore, the preparation of nanocomposite hydrogels with high gel strength by the method of organic / inorganic nanocomposites is of great significance in both theory and application. Among the organic / inorganic hybrid hydrogels reported in the literature, most of the work that can better impr...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/56C08F212/14C08F8/00C08L33/02C08K3/34
Inventor 王丕新徐昆张文德宋春雷刘晓光苏雪峰
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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