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Preparation method of acrylamide-polyvinyl alcohol-acrylic acid-calcium chloride three-network compound hydrogel

A technology of acrylamide and polyvinyl alcohol, which is applied in the field of preparation of acrylamide-polyvinyl alcohol-acrylic acid-calcium chloride triple network composite hydrogel, can solve the problem that PVA hydrogel does not have elongation at break, does not have Toughness and other issues to achieve the effects of avoiding stress defects, improving mechanical properties, and wide sources of raw materials

Inactive Publication Date: 2018-01-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The freezing / thawing cycle of the PVA polymer in the freezing-thawing cycle solution leads to the formation of physical crosslinks, and then forms a hydrogel with a three-dimensional network structure. Pure PVA hydrogels do not have good elongation at break, only physical cross-linked and thus not very ductile

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add polyvinyl alcohol (PVA) and deionized water (DI) into a 250ml flask and heat at 90°C for 2 hours to dissolve the polyvinyl alcohol to form a homogeneous solution, then place it at room temperature and cool it for later use.

[0028] Acrylamide (AM), acrylic acid (AC), PVA and calcium chloride (CaCl 2 ) was added into DI at a mass ratio of 4:2:1:0.2 to obtain a homogeneous mixed solution I, AM, AC, PVA and CaCl in the mixed solution 2 The total concentration is 23.07wt%, then add N,N'-methylene bisacrylamide in sequence, after dissolving, carry out argon bubble 0.5h, then add ammonium persulfate and N,N,N',N'-tetra Methylethylenediamine is mixed evenly, and the mass of N,N'-methylenebisacrylamide, ammonium persulfate and N,N,N',N'-tetramethylethylenediamine and acrylamide and acrylic monomer The ratio is 0.0014:0.0033:0.0083:1, and then the obtained solution is transferred to a glass mold, vacuumized and ultrasonically treated, sealed and then incubated at 60°C for ...

Embodiment 2

[0031] The preparation of polyvinyl alcohol solution is the same as in Example 1.

[0032] Mix AM, AC, PVA and CaCl at room temperature 2 Add it to DI at a mass ratio of 1:5:1:1 to obtain a homogeneous mixture I, AM, AC, PVA and CaCl in the mixture 2 The total concentration is 25.00wt%, then add N,N'-methylene bisacrylamide in sequence, after dissolving, carry out argon bubble 0.5h, then add ammonium persulfate and N,N,N',N'-tetra Methylethylenediamine is mixed evenly, and the mass of N,N'-methylenebisacrylamide, ammonium persulfate and N,N,N',N'-tetramethylethylenediamine and acrylamide and acrylic monomer The ratio is 0.0014:0.0033:0.0083:1, and then the obtained solution is transferred to a glass mold, vacuumized and ultrasonically treated, sealed and then incubated at 60°C for 8 hours. The freezing-thawing process is the same as in Example 1, and acrylamide-polyvinyl alcohol-acrylic acid-calcium chloride triple network composite hydrogel is formed.

[0033] The hydrogel...

Embodiment 3

[0035] The preparation of polyvinyl alcohol solution is the same as in Example 1.

[0036] Mix AM, AC, PVA and CaCl at room temperature 2 Add it to DI at a mass ratio of 3:3:1:1 to obtain a homogeneous mixture I, AM, AC, PVA and CaCl in the mixture 2The total concentration is 25.00wt%, then add N,N'-methylene bisacrylamide in sequence, after dissolving, carry out argon bubble 0.5h, then add ammonium persulfate and N,N,N',N'-tetra Methylethylenediamine is mixed evenly, and the mass ratio of N,N'-methylenebisacrylamide, ammonium persulfate and N,N,N',N'-tetramethylethylenediamine to acrylamide monomer is 0.0015:0.005:0.0125:1, then transfer the obtained solution into a glass mold, vacuumize and ultrasonically treat it, seal it and incubate at 60°C for 6 hours, freeze-thaw process is the same as in Example 1, and acrylamide- Polyvinyl alcohol-acrylic acid-calcium chloride triple network composite hydrogel.

[0037] The hydrogel obtained in this embodiment was measured by a uni...

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Abstract

The invention relates to a preparation method of acrylamide-polyvinyl alcohol-acrylic acid-calcium chloride three-network compound hydrogel. The preparation method comprises the following steps: firstly, proportionally dissolving acrylamide, acrylic acid, calcium chloride and polyvinyl alcohol into water for mixing; secondly, sequentially adding a cross-linking agent and an initiator; and after argon oxygen displacement treatment is performed, adding a catalyst; and thirdly, carrying out vacuumizing and ultrasonic treatment on the obtained mixture solution and then carrying out a heating reaction to obtain the acrylamide-polyvinyl alcohol-acrylic acid-calcium chloride three-network compound hydrogel with a certain shape. The prepared hydrogel is frozen at the temperature of 20 DEG C belowzero for 12 hours, is unfrozen at room temperature for 8 hours and is repeatedly frozen and unfrozen for three times. The acrylamide-polyvinyl alcohol-acrylic acid-calcium chloride three-network compound hydrogel prepared by the preparation method disclosed by the invention has relatively-high tensile strength and compression strength; the water absorption expansion rate can be controlled by controlling the use amounts of polyvinyl alcohol and calcium chloride; and in addition, the acrylamide-polyvinyl alcohol-acrylic acid-calcium chloride three-network compound hydrogel has a potential application value in biomedicine, such as non-load artificial cartilage.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a method for preparing acrylamide-polyvinyl alcohol-acrylic acid-calcium chloride triple network composite hydrogel. Background technique [0002] Hydrogel is a polymer material with a three-dimensional network structure. It is a material that can absorb water and swell but is insoluble in water and has good biocompatibility. It is widely used in many fields such as medicine, medical treatment, health care and tissue engineering. . The tensile strength and compressive strength of the hydrogel obtained by a single chemical crosslinking of traditional organic crosslinked hydrogels are very low, and the elongation at break of the hydrogel becomes lower with the increase of the amount of chemical crosslinking agent , the hydrogel becomes brittle under compression. Due to the poor mechanical strength of hydrogels, its application is limited. [0003] In recent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/26C08L29/04C08K3/16C08F220/56C08F220/06C08F222/38C08J3/24
Inventor 秦绪平王现功赵芳冯圣玉
Owner SHANDONG UNIV
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