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Tough stretchable compressible polymer/graphene oxide nano composite hydrogel with excellent self-repairing performance

A nanocomposite and hydrogel technology, applied in the field of self-healing hydrogel, can solve the problems of low self-healing efficiency, achieve excellent mechanical properties, enhance self-healing ability and mechanical strength, and achieve high self-healing efficiency

Inactive Publication Date: 2018-03-20
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although great progress has been made, most regenerative hydrogels recover less than 0.5 MPa tensile strength and less than 90% self-healing efficiency after repair.
Therefore, it remains a great challenge to design and synthesize novel self-healing materials with enhanced mechanical properties without sacrificing their repair efficiency.

Method used

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  • Tough stretchable compressible polymer/graphene oxide nano composite hydrogel with excellent self-repairing performance
  • Tough stretchable compressible polymer/graphene oxide nano composite hydrogel with excellent self-repairing performance
  • Tough stretchable compressible polymer/graphene oxide nano composite hydrogel with excellent self-repairing performance

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Embodiment 1

[0046] 1 Experimental part

[0047] 1.1 Experimental reagents and materials

[0048] Graphite powder (8000 mesh, purity 99.95%), sodium formaldehyde sulfoxylate hydrate (ALD), N,N'-methylenebisacrylamide (MBA), acrylamide (AM) and 2,2'-azobis (2-Methylpropionamidine) dihydrochloride (AIBA) was supplied by Aladdin Corporation. Ammonium persulfate (APS), concentrated sulfuric acid (95–98%), concentrated hydrochloric acid (36–38%), ammonia water, potassium permanganate, all of analytical grade (purchased from Beijing Chemical Company (China)). Hydrogen peroxide (H 2 o 2 ) and sodium nitrate were purchased from Laiyang Kangde Chemical Company. Acryloyloxyethyltrimethylammonium chloride, 80wt% aqueous solution (DAC) is purchased from Bailingwei Company

[0049] 1.2 Preparation of graphene oxide

[0050] Graphene oxide was prepared from natural graphite by the Hummers method. Briefly, 36ml of sulfuric acid was added to a 250ml round bottom flask placed in an ice bath. About ...

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Abstract

The invention provides tough stretchable compressible polymer / graphene oxide nano composite hydrogel and the tough stretchable compressible polymer / graphene oxide nano composite hydrogel has excellentself-repairing performance. Under the existence of graphene oxide, by free radical polymerization of acrylamide (AM) and acryloyloxyethyl trimethyl ammonium chloride (DAC), the cationic polyacrylamide / graphene oxide (GO) hydrogel is prepared. Mechanical performance and self-repairing capacity can be regulated by content of GO and a mass ratio of the AM to the DAC. An ionic bond between the DAC and the GO and a hydrogen bond between the AM and the GO can effectively dissipate energy and reconstruct a network. The obtained composite hydrogel has high rigidity (Young modulus: to 1.1MPa), high toughness (to 9.3MJm<-3>) and high fatigue resistance, and a high self-repairing rate (tensile strength of over 92%, tensile strain of over 99% and toughness of over 93%). The tough stretchable compressible polymer / graphene oxide nano composite hydrogel are simple in step, convenient to operate and high in practicality.

Description

technical field [0001] The invention belongs to the field of self-repairing hydrogels, in particular to tough, stretchable and compressible polymer / graphene oxide nanocomposite hydrogels with excellent self-repairing performance. Background technique [0002] Recently, self-healing materials have received increasing attention due to their ability to repair themselves after damage, as this property can extend the life of the material, reduce maintenance costs, and improve the overall safety of the system. There are three strategies to achieve self-healing materials, including the storage of repairing agents, dynamic covalent bond formation, and the use of non-covalent interactions (e.g., hydrogen bonds, hydrophobic associations, host-guest interactions, π-π stacking, and electrostatic interactions). Hydrogels, as soft three-dimensional mesh materials, can not only be used in bioengineering because of their biocompatibility, but also have potential applications in waste treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/34C08F220/56C08F2/44C08K3/04
CPCC08F220/34C08F2/44C08K3/04C08F220/56
Inventor 刘利彬潘晨光张强郭改兰
Owner QILU UNIV OF TECH
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