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Application of multi-component super-molecule hydrogel as adhesion agent

A supramolecular hydrogel and adhesive technology, applied in the direction of non-polymer adhesive additives, adhesives, adhesive types, etc., can solve the problem of weak adhesive force, irreversible adhesive behavior, and only one-time use Use and other issues

Active Publication Date: 2013-09-04
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.
[0005] Although the adhesive has been commercialized, most commercially available products (such as general epoxy resin adhesives, polyacrylate adhesives (such as 502 glue)) have very poor adhesion on PTFE. Weak, and their bonding behavior is usually irreversible, only for one-time use

Method used

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  • Application of multi-component super-molecule hydrogel as adhesion agent
  • Application of multi-component super-molecule hydrogel as adhesion agent
  • Application of multi-component super-molecule hydrogel as adhesion agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Embodiment 1, preparation supramolecular hydrogel

[0064] 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;

[0065] 2) The resulting mixture was kept at 12°C for 10 minutes to obtain a carbon nanotube / polyethylene polyamine supramolecular hydrogel.

[0066] 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. .

[0067] figure 1 It is a digital photo of the carbon nanotube / polyethylene polyamine supramolecular hydrogel obtained in Example 1.

[0068] 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

[0073] Embodiment 2, preparation supramolecular hydrogel

[0074] 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;

[0075] 2) The resulting mixture was kept at 12°C for 6 hours to obtain a carbon nanotube / polyethyleneimine supramolecular hydrogel.

[0076] 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%).

[0077] 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

[0078] Embodiment 3, preparation supramolecular hydrogel

[0079] 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;

[0080] 2) The resulting mixture was kept at 12°C for 12 hours to obtain a graphene / polyethylene polyamine supramolecular hydrogel.

[0081] 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%).

[0082] 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 application of a multi-component super-molecule hydrogel as an adhesion agent. The hydrogel consists of a component with a strong hydrogen bond, a component with a weak hydrogen bond and water, wherein the component with the strong hydrogen bond is one or more of a carbon oxide nano tube, graphene oxide, carboxylic ferroferric oxide nano particles, carboxylic silver nano particles, carboxylic quantum dots, polyacrylic acid, polypropylene glycol, polyvinyl alcohol, polyurethane, polyamide and poly(sodium-p-styrenesulfonate); and the component with the weak hydrogen bond is a small molecule compound or a macromolecular compound. When the hydrogel provided by the invention is used as an adhesion agent, the hydrogel is different from a common adhesion agent; and the adhesive power of the gel in the vertical direction is far larger than that in the tangential direction, and thus the hydrogel can play the role of bonding two bones together in an artificial joint, so that the bones can rotate freely along the tangential direction without being separated from each other.

Description

technical field [0001] The invention relates to the application of a multi-component supramolecular hydrogel as a binder, and belongs to the field of hydrogel technology. 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 stren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J179/02C09J133/02C09J11/04C09J129/02C09J129/04C09J175/04C09J177/00C09J125/18C09J11/06C08J3/075
Inventor 张锦杜然
Owner PEKING UNIV
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