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Method for preparing polyaspartic acid nano hydrogel felt

A nano-hydrogel and polyaspartic acid technology, which is applied in textiles and papermaking, fiber treatment, non-woven fabrics, etc., can solve the problem of difficult control of polyaspartic acid electrospinning, and achieve a simple spinning process Easy to control, uniform fiber and small fiber diameter

Inactive Publication Date: 2015-07-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the disadvantage that polyaspartic acid electrospinning is not easy to control, and to provide a preparation method of polyaspartic acid nano hydrogel felt

Method used

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  • Method for preparing polyaspartic acid nano hydrogel felt
  • Method for preparing polyaspartic acid nano hydrogel felt
  • Method for preparing polyaspartic acid nano hydrogel felt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Polysuccinimide is self-made in the laboratory, the raw material is L-aspartic acid, purchased from Aladdin, the purity is 99%, and the specification is A108860-500g. The synthesis method of polysuccinimide is as follows: put finely ground L-aspartic acid and 259g of 85% phosphoric acid in a 2L flask and mix evenly, and react under reduced pressure on a rotary evaporator at 180°C for 2.5h to remove the original water and the water produced by the reaction. After cooling slightly, 200 mL of DMF was added to dissolve the massive solid formed, and the solution was poured into a beaker containing 1 L of distilled water. Filter and wash the precipitate with water until neutral. Vacuum-dried at 110°C for 24 hours to obtain polysuccinimide with a molecular weight of 30,000.

[0024] 2. Dissolving polysuccinimide in dimethylformamide, the mass fraction of the solution is 30%. After stirring completely to dissolve, stand still for degassing and spinning, set the advancing ...

Embodiment 2

[0028] 1. Polysuccinimide is self-made in the laboratory, the raw material is L-aspartic acid, purchased from Aladdin, the purity is 99%, and the specification is A108860-500g. The synthesis method of polysuccinimide is as follows: put finely ground L-aspartic acid and 259g of 85% phosphoric acid in a 2L flask and mix evenly, and react under reduced pressure on a rotary evaporator at 180°C for 2.5h to remove the original water and the water produced by the reaction. After cooling down slightly, 200 mL of DMF was added to dissolve the massive solid formed, and the solution was poured into a beaker containing 1 L of distilled water. Filter and wash the precipitate with water until neutral. Vacuum-dried at 110°C for 24 hours to obtain polysuccinimide with a molecular weight of 30,000.

[0029] 2. Dissolving polysuccinimide in dimethylformamide, the mass fraction of the solution is 33%. After stirring completely to dissolve, stand still for degassing, and perform spinning. Set ...

Embodiment 3

[0033] 1. Polysuccinimide is self-made in the laboratory, the raw material is L-aspartic acid, purchased from Aladdin, the purity is 99%, and the specification is A108860-500g. The synthesis method of polysuccinimide is as follows: put finely ground L-aspartic acid and 259g of 85% phosphoric acid in a 2L flask and mix evenly, and react under reduced pressure on a rotary evaporator at 180°C for 2.5h to remove the original water and the water produced by the reaction. After cooling down slightly, 200 mL of DMF was added to dissolve the massive solid formed, and the solution was poured into a beaker containing 1 L of distilled water. Filter and wash the precipitate with water until neutral. Vacuum-dried at 110°C for 24 hours to obtain polysuccinimide with a molecular weight of 30,000.

[0034] 2. Dissolving polysuccinimide in dimethylformamide, the mass fraction of the solution is 27%. After stirring completely to dissolve, stand still for degassing, and perform spinning. Set ...

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Abstract

The invention discloses a method for preparing a piece of polyaspartic acid nano hydrogel felt. The method comprises the following steps of: dissolving an intermediate of polyaspartic acid, namely polysuccinimide, in dimethylformamide for electrostatic spinning, so as to obtain a piece of polysuccinimide nano fiber felt; cross-linking the obtained polysuccinimide nano fiber felt by a cross-linking agent; dipping the cross-linked nano felt in a sodium hydroxide solution for hydration, washing the nano felt by using distilled water until the nano felt is neutral, deswelling the washed nano felt by using methanol, and then performing vacuum drying on the deswelled nano felt, so as to obtain the polyaspartic acid nano hydrogel felt insoluble in water. The nano hydrogel felt provided by the invention has the characteristics of nanoscale reticular structure, high water-absorbing quality, high swelling rate, excellent biocompatibility and biodegradability, and the like; and therefore, the nano hydrogel felt has a quite wide application prospect in the aspects of drug sustained release and tissue engineering as well as the aspect of water-absorbing materials.

Description

technical field [0001] The invention belongs to the technical field of polymer nano hydrogel preparation, and relates to a preparation method of polyaspartic acid nano hydrogel felt. Background technique [0002] Hydrogel is a polymer material with a three-dimensional network structure through moderate crosslinking, which is hydrophilic but insoluble in water. They can quickly swell to an equilibrium volume in water and still maintain their shape and three-dimensional space network structure, and dehydrate and deswell under certain conditions. Polymer Materials. At present, hydrogels are widely used in the fields of industry, agriculture, medicine and bioengineering materials. [0003] Although gels synthesized by traditional methods can obtain high swelling rates, their swelling kinetics are usually quite slow. The emergence of porous hydrogels has solved this problem well. In addition, the formation of porous structure can make the gel have more space to absorb more wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M13/332D06M13/123D04H1/728D04H1/4326D06M101/30
Inventor 覃小红张彩丹吴韶华吴佳骏李鹏翔
Owner DONGHUA UNIV
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