The invention discloses a preparation method of a hydrogel electrode with high mechanical property and self-healing property, and belongs to the technical field of biological materials. The preparation method comprises the following steps of firstly, preparing a polydopamine-modified conductive nanometer material in a solution; then, adding a water-soluble monomer into the solution; adding an initiator, a crosslinking agent and an additive, and uniformly mixing; initiating and polymerizing by free radicals to form the hydrogel electrode. The prepared hydrogel electrode has the advantages that the good conductive property and mechanical property are realized; under the non-covalent bond action of polydopamine chains, the self-healing capability is good; the conductivity and mechanical property can be healed by self in short time after accidental damaging; the biocompatibility is good, so that the hydrogel electrode is expected to be applied into modern clinical detection and biomedical measurement.

Preparation method of hydrogel electrode with high mechanical property and self-healing property

An optical fiber includes a graphene oxide and a reduced graphene oxide and a gas sensor includes the optical fiber. A method for manufacturing the optical fiber includes coating a graphene oxide layer and reducing a part of the graphene oxide layer, and a method for manufacturing the gas sensor includes coating a graphene oxide layer and reducing a part of the graphene oxide layer.

Optical fiber containing graphene oxide and reduced graphene oxide, and method for manufacturing gas sensor containing the same

Reduced-graphene oxide circuits are directly patterned on glass substrate using an industrially available excimer laser system. A threshold of laser energy density is observed, which provide a clear differentiation on whether the graphene oxide is reduced. The highest conductivity measured is 7.142×10 3 S/m. The reduced-graphene oxide displays a transmittance greater than 80% across the entire range from 450 to 800 nm. The outstanding electrical, optical, and morphological properties have enabled reduced-graphene oxide to display promising applications, and this nano-processing method makes reduced-graphene oxide even more attractive when used as a transparent electrode for touch screens or in other applications.

Laser direct patterning of reduced-graphene oxide transparent circuit

The invention relates to a method for preparing highly conductive graphene oxide, and belongs to the field of filler surface functionalization. The method comprises the following steps of after depositing dopamine on the surface of the graphene oxide under alkaline conditions, placing polydopamine surface functionalised graphene oxide in a silver plating solution, adding a reducing agent glucose solution to carry out reduction, and finally coating a uniform and dense silver thin layer on the surface of a graphene oxide nano-layer with a high shape factor by heat treatment. The method provided by the invention has the advantages of mild conditions, very short consumed time and strong controllability, the coating performance of the prepared composite material is good, the bonding strength between the silver layer and the graphene oxide is higher, and the conductivity is excellent.

Method for preparing highly conductive graphene oxide

The invention relates to a magnetic graphene oxide composite nanomaterial and a preparation method thereof. The material is prepared from graphene oxide, magnetic nano particles and a polydopamine shell layer; graphene oxide is connected with the magnetic nano particles wrapped by polydopamine, polydopamine serves as a connecting arm between the magnetic nano particles and graphene oxide, and the magnetic nano particles are immobilized on the surface of graphene oxide. When the material is prepared, the magnetic nano particles with stable citric acid are firstly prepared according to a solvothermal method, and then the surfaces of the magnetic nano particles are wrapped by the polydopamine shell layer in an alkaline buffer solution; finally, hydrogen bonds between polydopamine and graphene oxide and pi-pi interact, and the magnetic graphene oxide composite nanomaterial is prepared. The material has the common properties of graphene oxide and the magnetic nano particles, the hydrophilic performance of the material is improved through introduction of polydopamine, and the method is mild in condition and high in expansibility, and preparation is easy and convenient.

Magnetic graphene oxide composite nanomaterial and preparation method thereof

The present disclosure relates to a graphene paper which reduced graphene oxide layers and coating layers are stacked in sequence. The graphene paper prepared according to a preparation method of the present invention has excellent electrical conductivity and mechanical properties, and can be economically prepared in large-sized graphene paper, therefore may be efficiently applied to various electrical devices such as thin-film electrodes, flexible electrodes, super capacitors, semiconductor insulating layer reinforcements and TFT semiconductor layer-electrodes, and the like.

Graphene paper which reduced graphene oxide layers and coating layers are stacked in sequence and preparation method thereof

PROBLEM TO BE SOLVED: To provide a graphene paper in which coating layers and reduced graphene oxide layers are laminated sequentially.SOLUTION: Concerning the graphene paper produced by this method, not only the electric conductivity and mechanical property thereof are excellent, but also a large-area graphene paper can be formed economically. Therefore, the graphene paper is useful for producing electronic materials such as a thin-film electrode, a flexible electrode, a supercapacitor, a reinforcing agent for a semiconductor conductive film, or a TFT semiconductor layer electrode.

Graphene paper of reduced graphene oxide layer and coating layer laminated sequentially, and method for producing the same

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Graphene paper which reduced graphene oxide layers and coating layers are stacked in sequence and preparation method thereof

Graphene paper of reduced graphene oxide layer and coating layer laminated sequentially, and method for producing the same