Multi-component super-molecular hydrogel and preparation method thereof

A supramolecular hydrogel and hydrogel technology, applied in chemical method analysis, non-polymer adhesive additives, adhesives, etc., to achieve a strong universal effect

Active Publication Date: 2013-08-14
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, carbon nanotube-based hydrogels with self-healing functions or the ability to respond to more than two external stimuli simultaneously have rarely been reported.

Method used

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  • Multi-component super-molecular hydrogel and preparation method thereof
  • Multi-component super-molecular hydrogel and preparation method thereof
  • Multi-component super-molecular hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1, preparation supramolecular hydrogel

[0072] 1) Take 1 mL of oxidized carbon nanotube aqueous solution with a concentration of 4 mg / mL, add 1 mL of polyethylene polyamine, seal the system and heat it in a water bath at 50 °C for 30 s;

[0073] 2) The resulting mixture was kept at 12°C for 10 minutes to obtain a carbon nanotube / polyethylene polyamine supramolecular hydrogel.

[0074] Then, according to the above steps, by adjusting the mass ratio of oxidized carbon nanotubes to polyethylene polyamine (1:33-3500) and the mass percentage of water (25%-90%), a series of hydrogels with compositions were prepared. .

[0075] figure 1 It is a digital photo of the carbon nanotube / polyethylene polyamine supramolecular hydrogel obtained in Example 1.

[0076] in figure 1 (a) In the hydrogel shown, the concentration of oxidized carbon nanotubes is 0.2wt%, and the water content is 25wt%, 37.5wt%, 50wt%, 62.5wt% and 75wt% from left to right; figure 1 (b) The water...

Embodiment 2

[0081] Embodiment 2, preparation supramolecular hydrogel

[0082] 1) Take 1 mL of oxidized carbon nanotube aqueous solution with a concentration of 4 mg / mL, add 1 mL of branched polyethyleneimine with a molecular weight of 300, seal the system and heat it in a water bath at 50 °C for 30 s;

[0083] 2) The resulting mixture was kept at 12°C for 6 hours to obtain a carbon nanotube / polyethyleneimine supramolecular hydrogel.

[0084] Then, according to the above steps, a series of hydrogels were prepared by adjusting the mass ratio of carbon nanotubes to polyethyleneimine (1:33-3500) and the mass percentage of water (25%-75%).

[0085] A digital photo of a hydrogel of a composition prepared in this example (the concentration of oxidized carbon nanotubes is 0.2wt%, the water content is 50wt%, and the mass ratio of oxidized carbon nanotubes to polyethyleneimine is 1:250) is as follows figure 2 (b) shown.

Embodiment 3

[0086] Embodiment 3, preparation supramolecular hydrogel

[0087] 1) Take 1mL of graphene oxide aqueous solution with a concentration of 3mg / mL, add 1mL of polyethylene polyamine, seal the system and heat it in a water bath at 50°C for 30s;

[0088] 2) The resulting mixture was kept at 12°C for 12 hours to obtain a graphene / polyethylene polyamine supramolecular hydrogel.

[0089] Then, according to the above steps, a series of hydrogels were prepared by adjusting the mass ratio of graphene oxide to polyethylene polyamine (1:33-3500) and the mass percentage of water (25%-90%).

[0090] A digital photo of a composition of hydrogel prepared in this embodiment (the concentration of carbon nanotubes is 0.15wt%, the water content is 50wt%, and the mass ratio of graphene oxide to polyethylene polyamine is 1:333.3 is as follows figure 2 (c) shown.

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Abstract

The invention discloses multi-component super-molecular hydrogel and a preparation method of the multi-component super-molecular hydrogel. The hydrogel is formed by a component containing a strong hydrogen bond, a component containing a weak hydrogen bond and water, wherein the component containing the strong hydrogen bond is one or more of a carbon oxide nano tube, graphene oxide, a carboxylated ferroferric oxide nano particle, a carboxylated silver nano particle, a carboxylated quantum dot, polyacrylic acid, polypropylene glycol, polyvinyl alcohol, polyurethane, polyamide and poly(p-styrene) sodium sulfonate; and the component containing the weak hydrogen bond is a small-molecular compound or a high-molecular compound. A lot of cross-linking force of the hydrogel disclosed by the invention comes from the weak hydrogen bond so that the hydrogel is very sensitive to the stimulation of an external environment; when chemical components are proper, gel-sol conversion can be carried out under the effects of temperature rising, near-infrared light illumination and acids; and the conversion is reversible, namely the gel-sol conversion can be carried out under the effects of temperature reduction, removing of a near-infrared light source and alkalis.

Description

technical field [0001] The invention relates to a multi-component supramolecular hydrogel and a preparation method thereof. Background technique [0002] With the emergence of supramolecular science, supramolecular hydrogels have attracted extensive attention since the beginning of the 21st century. Compared with hydrogels cross-linked by traditional chemical methods, the three-dimensional network structure of supramolecular hydrogels is induced by weak interactions. Because the weak interaction is extremely sensitive to changes in the environment and is often reversible, supramolecular hydrogels not only maintain the characteristics of high water content, biocompatibility, and environmental friendliness of traditional hydrogels, but also often have both Excellent properties such as stimulation response and self-healing. However, hydrogels that can realize multiple functions often have strict requirements on the type and strength of cross-linking force. How to effectively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08G73/04C08L33/02C08K9/02C08K7/00C08K3/04C08K3/22C08K3/30C08L29/02C08L29/04C08L75/04C08L77/00C08L25/18C08K3/08C08J3/24C08J3/075C09J179/02C09J133/02C09J11/04G01K11/06G01J1/48G01N31/00
Inventor 张锦杜然
Owner PEKING UNIV
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