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High-strength self-repairing conductive magnetic PVA (Polyvinyl Alcohol) hydrogel and preparation method thereof

A self-healing, high-strength technology applied in the field of functional polymer materials

Inactive Publication Date: 2018-03-23
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to overcome the existing shortcoming of hydrogel, provide a kind of high-strength self-healing conductive magnetic PVA hydrogel and preparation method thereof

Method used

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  • High-strength self-repairing conductive magnetic PVA (Polyvinyl Alcohol) hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of polyaniline-coated nanocellulose:

[0020] First, weigh 20 grams of 1% nanocellulose aqueous suspension in a 100ml beaker, and place it in an ice-water bath at 4°C. 2mmol of phytic acid and 6mmol of aniline were dissolved in 4ml of distilled water, stirred evenly, and added dropwise into the nanocellulose. Weigh 2mmol of ammonium persulfate and dissolve in 4ml of distilled water. Then the ammonium persulfate solution was added dropwise to the nanocellulose to initiate aniline polymerization, and finally the nanocellulose / polyaniline composite was obtained by centrifuging and washing with distilled water for 5 times in a centrifuge at 10,000 rpm.

[0021] (2) Nanocellulose / polyaniline composite dispersed MnFe 2 o 4 Preparation of magnetic nanoparticles:

[0022] Add water to the above-mentioned nanocellulose / polyaniline composite to a concentration of 0.5wt%, and then add 8mmol FeCl 3 and 4 mmol MnSO 4 Stir to dissolve, and heat to 70°C, keep for...

Embodiment 2

[0026] (1) Preparation of polyaniline-wrapped nanocellulose:

[0027] First, weigh 30 grams of 1% nanocellulose in a 100ml beaker and place it in an ice-water bath at about 4°C. 3mmol of phytic acid and 9mmol of aniline were dissolved in 4ml of distilled water, stirred evenly, and added dropwise to the nanocellulose. Weigh 3mmol of ammonium persulfate and dissolve in 4ml of distilled water. Then the ammonium persulfate solution was added dropwise to the nanocellulose to initiate aniline polymerization, and finally the nanocellulose / polyaniline composite was obtained by centrifuging and washing with distilled water for 5 times in a centrifuge at 10,000 rpm.

[0028] (2) Nanocellulose / polyaniline composite dispersed MnFe 2 o 4 Preparation of magnetic nanoparticles:

[0029] Add water to the above nanocellulose / polyaniline composite to a concentration of 0.5wt%, and then add 10mmol FeCl 3 and 5mmolMnSO 4 Stir to dissolve, and heat to 70°C, keep for 5h, add dropwise 6mol / L N...

Embodiment 3

[0033] (1) Preparation of polyaniline-wrapped nanocellulose (nanocellulose):

[0034] First, weigh 40 grams of 1% nanocellulose in a 100ml beaker and place it in an ice-water bath at 4°C. 4mmol of phytic acid and 12mmol of aniline were dissolved in 4ml of distilled water, stirred evenly, and added dropwise into the nanocellulose. Weigh 4mmol of ammonium persulfate and dissolve in 4ml of distilled water. Then the ammonium persulfate solution was added dropwise to the nanocellulose to initiate aniline polymerization, and finally the nanocellulose / polyaniline composite was obtained by centrifuging and washing with distilled water for 5 times in a centrifuge at 10,000 rpm.

[0035] (2) Nanocellulose / polyaniline composite dispersed MnFe 2 o 4 Preparation of magnetic nanoparticles:

[0036] Add water to the above nanocellulose / polyaniline composite to a concentration of 0.5wt%, and then add 10mmol FeCl 3 and 5 mmol MnSO 4 Stir to dissolve, and heat to 70°C, keep for 5h, add drop...

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Abstract

The invention belongs to the technical field of functional polymer materials, and particularly relates to high-strength self-repairing conductive magnetic PVA (Polyvinyl Alcohol) hydrogel and a preparation method thereof. The method comprises the steps of wrapping polyaniline into the surface of nano-crystalline cellulose, immobilizing MnFe2O4 magnetic particles, then adding into a PVA water solution, uniformly mixing, and preparing the high-strength self-repairing conductive magnetic PVA hydrogel. A nano-crystalline cellulose / polyaniline / MnFe2O4 compound is utilized, so that the PVA hydrogelhas high strength, electrical conductivity and magnetic performance at the same time, three defects of low strength, no electrical conductivity and no magnetism of common PVA hydrogel are overcome, and the PVA hydrogel has a higher application value.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and in particular relates to a high-strength self-repairing conductive magnetic PVA hydrogel and a preparation method thereof. Background technique [0002] Hydrogel is a gel with water as the dispersion medium. A part of hydrophobic groups and hydrophilic residues are introduced into the water-soluble polymer with a network cross-linked structure. joint polymer. It is a polymer network system, which is soft in nature, can maintain a certain shape, and can absorb a large amount of water. At present, the main hydrogels produced have disadvantages such as single functionality. Therefore, in order to meet the growing industrial needs, research and development of self-healing, conductive, and magnetic hydrogels are of great significance. [0003] Polyvinyl alcohol (PVA) is an extremely safe polymer organic substance, non-toxic to the human body, has no side effects, and has g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L29/04C08L79/02C08L1/02C08K3/24
Inventor 刘凯黄六莲陈礼辉
Owner FUJIAN AGRI & FORESTRY UNIV
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