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Preparation method of high-strength double-network nano hectorite composite aquagel

A technology of composite hydrogel and laponite, which is applied in the field of preparation of high-strength hydrogel to avoid hydrogel defects, enhance stability, and improve mechanical strength

Inactive Publication Date: 2015-02-11
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the traditional sodium alginate / polyacrylamide double network hydrogel, it has a greater improvement

Method used

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  • Preparation method of high-strength double-network nano hectorite composite aquagel
  • Preparation method of high-strength double-network nano hectorite composite aquagel
  • Preparation method of high-strength double-network nano hectorite composite aquagel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Boil distilled water, seal and cool to room temperature to remove oxygen in the water, prepare a 1% nano-hectorite aqueous solution with the cooled distilled water, the particle size of the nano-hectorite used is 20-30nm, and disperse evenly after ultrasonic vibration for 10 minutes ,spare;

[0032] 2) get sodium alginate and acrylamide to be dissolved in step 1) in the nano hectorite aqueous solution prepared, the mass ratio of described sodium alginate and acrylamide is 1:6, and the total content of sodium alginate and acrylamide The mass fraction of 10%;

[0033] 3) Add N,N'-methylenebisacrylamide, ammonium persulfate, and tetramethylethylenediamine to the solution obtained in step 2), the N,N'-methylenebisacrylamide, persulfate Ammonium sulfate and tetramethylethylenediamine account for 0.03%, 0.1%, and 0.2% of the mass of acrylamide, respectively;

[0034] 4) Transfer the solution prepared in step 3) to a glass mold, seal it, place it at 45°C, and keep it warm...

Embodiment 2

[0038] 1) Boil the distilled water, seal and cool to room temperature to remove the oxygen in the water, prepare a 10% nano-hectorite aqueous solution with the cooled distilled water, the particle size of the nano-hectorite used is 90-100nm, and disperse evenly after ultrasonic vibration for 10 minutes ,spare;

[0039] 2) get sodium alginate and acrylamide to be dissolved in step 1) in the nano hectorite aqueous solution prepared, the mass ratio of described sodium alginate and acrylamide is 1:6, and the total content of sodium alginate and acrylamide The quality score of 20%;

[0040]3) Add N,N'-methylenebisacrylamide, ammonium persulfate, and tetramethylethylenediamine to the solution obtained in step 2), the N,N'-methylenebisacrylamide, persulfate Ammonium sulfate and tetramethylethylenediamine account for 0.09%, 0.2%, and 0.3% of the mass of acrylamide, respectively;

[0041] 4) Transfer the solution prepared in step 3) to a glass mold, seal it, place it at 55°C, and kee...

Embodiment 3

[0045] 1) Boil distilled water, seal and cool to room temperature to remove oxygen in the water, prepare a 6% nano-hectorite aqueous solution with a mass fraction of 6% nano-hectorite with the cooled distilled water, the particle size of the nano-hectorite used is 40-50nm, and disperse evenly after ultrasonic vibration for 10 minutes ,spare;

[0046] 2) get sodium alginate and acrylamide to be dissolved in step 1) in the nano hectorite aqueous solution prepared, the mass ratio of described sodium alginate and acrylamide is 1:6, and the total content of sodium alginate and acrylamide The quality score of 14%;

[0047] 3) Add N,N'-methylenebisacrylamide, ammonium persulfate, and tetramethylethylenediamine to the solution obtained in step 2), the N,N'-methylenebisacrylamide, persulfate Ammonium sulfate and tetramethylethylenediamine account for 0.06%, 0.17%, and 0.25% of the mass of acrylamide, respectively;

[0048] 4) Transfer the solution prepared in step 3) to a glass mold,...

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Abstract

The invention discloses a preparation method of a high-strength double-network nano hectorite composite aquagel. The method comprises the following steps: preparing a nano hectorite water solution with cooled boiled distilled water, and dissolving sodium alginate, acrylamide, a crosslinking agent, an initiator and a catalyst in the hectorite water solution, quickly transferring the prepared solution into a glass mold, putting the sealed mold in a 45-55 DEG C environment, and keeping the temperature to react for 2-6 hours; and taking out the formed aquagel in the mold, immersing in a 0.1-1M CaCl2 water solution for 2-6 hours, and taking out to obtain the high-strength double-network nano hectorite composite aquagel. Compared with the traditional aquagel, the composite aquagel has higher strength and percentage of elongation, thereby satisfying the application demands for human cartilage restoration, tissue engineering and other aspects.

Description

technical field [0001] The invention relates to the field of preparation of a high-strength hydrogel, in particular to the preparation of a high-strength double-network nanocomposite hydrogel. technical background [0002] Hydrogel is a kind of macromolecule or macromolecular aggregate with chemical or physical cross-linking structure, which can absorb a large amount of water but is insoluble in water. They can maintain a certain shape and three-dimensional space network structure in water. As a soft material with a water content of up to 90% and very similar to biological soft tissue, hydrogel is widely used in biological and medical fields, such as tissue engineering and cartilage repair. However, the mechanical strength of traditional hydrogels is far lower than that of natural biological tissues, which severely limits the clinical application of hydrogels. Therefore, narrowing the performance gap between polymer hydrogels and biological soft tissues, seeking polymer hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56C08F2/44C08K3/34C08J3/24C08J3/075
Inventor 翟云鸽段洪东
Owner QILU UNIV OF TECH
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