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Preparation method and application of Cu nanowire-reduced graphene oxide three-dimensional porous film

A three-dimensional porous and nanowire technology, applied in the direction of electric/magnetic solid deformation measurement, electromagnetic measurement device, etc., can solve the problems of low sensitivity of resistance strain sensor and narrow strain detection range, and achieve mild conditions, low cost, and excellent electrical conductivity. Effects of sexual and mechanical properties

Inactive Publication Date: 2016-05-18
ZHEJIANG SCI-TECH UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, capacitive strain sensors cannot withstand large strains, and resistive strain sensors have low sensitivity and narrow strain detection range, which restricts their wide application in wearable devices.

Method used

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  • Preparation method and application of Cu nanowire-reduced graphene oxide three-dimensional porous film
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  • Preparation method and application of Cu nanowire-reduced graphene oxide three-dimensional porous film

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preparation example Construction

[0020] The invention provides a method for preparing a Cu nanowire-reduced graphene oxide-PDMS composite material strain sensor, comprising the following contents:

[0021] The preparation method of graphene oxide is: slowly mix 270mL concentrated sulfuric acid / phosphoric acid mixed acid (H 2 SO 4 :H 3 PO 3 =9:1, V / V) was added dropwise to a beaker with 2g of natural graphite powder and kept stirring, then slowly added 12g of potassium permanganate, after mixing evenly, the beaker was transferred to a 50°C water bath for 12h. After the reaction was completed, 300 mL of ice water was added into the beaker, and after cooling to room temperature, 5 mL of 30% hydrogen peroxide was added dropwise to obtain a bright yellow product. Finally, the product was centrifuged and washed with hydrochloric acid and deionized water until pH = 6 at a rotation speed of 8000 rpm / min, and finally freeze-dried to obtain graphene oxide.

[0022] The preparation method of copper nanowire is: prep...

Embodiment 1

[0024] Take a 50mL beaker, measure 22mL of ethylene glycol solution, pour 5mg of reddish-brown Cu nanowires into it, stir and sonicate, repeat several times to obtain a reddish-brown solution, add 50mg of ascorbic acid and 3.1mL of 8mg / mL graphene oxide, and then proceed Stir and sonicate until the graphene oxide is uniformly dispersed, then move it to a hydrothermal reaction kettle, place the reaction kettle in a blast drying oven at 120°C for 4 hours, and finally lower the temperature to room temperature to obtain Cu nanowires- Reduced graphene oxide composite hydrogels.

[0025] Rinse the Cu nanowire-reduced graphene oxide composite hydrogel in the hydrothermal reactor with deionized water for 4-5 times, then pour it into a 100mL beaker and rinse for 3-4 times, in order to remove the gel surface of organic solvents. Then it was dialyzed in 500 mL of 0.5 wt% hydrazine hydrate solution for 16 hours, in order to remove the organic solvent in the gel. Finally, pour it into a ...

Embodiment 2

[0027] Take a 50mL beaker, measure 22mL ethylene glycol solution, pour 10mg reddish-brown Cu nanowires into it, stir, sonicate, repeat several times to obtain a reddish-brown solution, add 50mg ascorbic acid and 3.1mL8mg / mL graphene oxide, and then proceed Stir and sonicate until the graphene oxide is uniformly dispersed, then move it to a hydrothermal reaction kettle, place the reaction kettle in a blast drying oven at 120°C for 4 hours, and finally lower the temperature to room temperature to obtain Cu nanowires- Reduced graphene oxide composite hydrogels.

[0028] Rinse the Cu nanowire-reduced graphene oxide composite hydrogel in the hydrothermal reactor with deionized water for 4-5 times, and pour it into a 100mL beaker for 3-4 times. Then place it in 500mL0.5wt% hydrazine hydrate solution for dialysis for 16h, and finally pour it into a 150mL beaker, rinse it with deionized water after 3 times, put it on a magnetic stirrer to stir evenly, and ultrasonically , until a bla...

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Abstract

The invention provides a preparation method of a Cu nanowire-reduced graphene oxide-PDMS composite strain sensor, and belongs to the field of reduced graphene oxide composite sensors. The preparation method comprises the steps that copper nanowires are added into graphene oxide containing ascorbic acid, Cu nanowire-reduced graphene oxide hydrogel is obtained after reducing, and a Cu nanowire-reduced graphene oxide film with the three-dimensional porous appearance is obtained through washing, stir-breaking and suction filtration film formation; and then liquid PDMS is poured, vacuum filtration is carried out to remove bubbles, the liquid PDMS is subjected to cross-linking and curing at the temperature of 70 DEG C, and finally the Cu nanowire-reduced graphene oxide-PDMS composite strain sensor is obtained. The composite film is large in specific surface area and excellent in electric conductivity and mechanical performance, and the preparation method of a Cu nanowire-reduced graphene oxide-PDMS composite is mild in condition, simple, practical, controllable in process parameter, low in cost and high in repeatability.

Description

technical field [0001] The invention belongs to the field of reduced graphene oxide composite material sensors, and in particular relates to a preparation method using Cu nanowires, reduced graphene oxide and PDMS composite materials, and a method for preparing strain sensors by using the same. The invention belongs to the technical field of advanced graphene composite material sensor preparation. Background technique [0002] As one of the first metal elements discovered and utilized by human beings, Cu has a large reserve in nature and a low price. Its price is about one percent of gold and one tenth of silver. As a one-dimensional nanomaterial, Cu nanowires not only retain the commonality of other nanomaterials, but also have a large aspect ratio and specific surface area, and good electrical conductivity, catalysis and mechanical properties. Therefore, Cu nanowires are widely used in electronic circuits, chemical catalysis, and flexible conductive devices. [0003] Gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24G01B7/16
CPCG01B7/18B22F9/24
Inventor 刘爱萍陆标钱巍吴化平王夏华洪聪聪
Owner ZHEJIANG SCI-TECH UNIV
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