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Microfluidic equipment for preparing graphene oxide

A graphene and fossil technology, applied in the field of equipment for preparing graphene oxide using microfluidic technology, can solve the problems of batch process with many steps, hindering the reaction process, environmental problems, etc.

Pending Publication Date: 2021-05-11
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many problems in the reported improved Hummers method: first, the oxidation rate of graphite is restricted by the slow diffusion of active substances between pre-intercalated graphite layers, and the reaction time is long; 2 o 7 There is a risk of explosion at high temperature, and the reaction safety hazard is great; 3. There are many steps in the batch process, and the product quality is difficult to accurately control
[0004] Existing reports use stronger oxidants to quickly prepare graphene oxide. The invention patent "CN104310385A A Fast and Green Method for Preparing Single-layer Graphene Oxide" uses potassium ferrate as an oxidant and reacts at -10-80°C for 0.5- 24h, although the reaction time can be shortened to 0.5h, but the use of more strong oxidants leads to more serious environmental problems
The invention patent "CN106882803A A method and device for preparing graphene oxide" uses a multi-stage pipeline reactor for mixing, oxidation and reduction respectively, which strengthens the reaction control and realizes continuous production, but still uses conventional pipelines, in which the oxidation The steps still take 1-4h
Invention patent "CN102471068B Manufacturing method of nanometer-sized graphene materials and its manufacturing equipment" introduced microchannel equipment for the first time to prepare graphene oxide and stripped and reduced it in a vertical fluidized bed furnace, realizing continuous production of graphene, but no Realize the controllable preparation of graphene oxide oxidation degree, and the yield of graphite oxide is not specified
In addition, the intercalation reaction and oxidation reaction in the microreactor of this patent are carried out at the same time, and it is difficult to achieve effective regulation of the oxidation reaction alone
And the quenching step is carried out in the microreactor, and the quenching step involves a quenching agent (such as H 2 o 2 ) reacts with the unreacted oxidant, a large amount of gas will be produced, which will easily cause the problem of hindering the reaction process and clogging in the microchannel

Method used

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  • Microfluidic equipment for preparing graphene oxide

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Embodiment Construction

[0025] In the following, only some exemplary embodiments are briefly described. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the descriptions are to be regarded as exemplary rather than restrictive in nature.

[0026] In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Straight", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", etc. or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be ...

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Abstract

The invention discloses equipment for preparing graphene oxide through microflow control. The equipment comprises a first raw material tank, a second raw material tank, a micro-mixer, a micro-channel reactor, a separation device, a graphene oxide collection device, an acid liquor collection device and a purification device, wherein the first raw material tank and the second raw material tank are respectively connected with a feed port of the micro-mixer, a discharge port of the micro-mixer is connected with a feed port of the micro-channel reactor, a discharge port of the micro-channel reactor is connected with the separation device, the graphene oxide collection device and the acid liquor collection device are respectively connected with the separation device, and the purification device is connected with the graphene oxide collection device.

Description

technical field [0001] The invention relates to the field of graphene oxide preparation, in particular to equipment for preparing graphene oxide using microfluidic technology. Background technique [0002] Graphene, as a single atomic layer two-dimensional material formed by periodic repeated arrangements of carbon six-membered rings, has attracted much attention due to its excellent electrical, thermal, and mechanical properties since its inception, and is considered to be a functional material and structural material with great potential . The top priority for the development of graphene in important fields such as energy, environment, biomedicine, and electronic devices is to solve the problem of efficient preparation of graphene. The reduced graphene oxide method is considered to be one of the easiest methods to scale up and realize large-scale production of graphene. , by chemically modifying a large number of oxygen-containing functional groups on the graphite sheet, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00C01B32/198
CPCB01J19/0093B01J2219/00867B01J2219/00889C01B2204/02C01B32/198
Inventor 朱彦武郑雅轩叶传仁袁宏唐润理瞿研
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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