CN110498407A

CN110498407A - Liquid CO2Graphene fragment film build method is integrated in sedimentation

Info

Publication number: CN110498407A
Application number: CN201910780960.7A
Authority: CN
Inventors: 董兰田; 董恬纲
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2019-11-26

Abstract

The present invention discloses a kind of liquid CO₂Graphene fragment film build method is integrated in sedimentation.It is characterized in that by mixed in proportion powdery graphite alkene fragment and liquid CO₂Suspension pours into horizontal positioned evaporating pan, graphene sedimentation, liquid CO₂Graphene diaphragm is obtained after evaporation.The characteristics of compared with prior art, the present invention having easy using facility, film forming is balanced, low in cost, safety and environmental protection, also has and expands and extend graphene fragment continuity, is further promoted in graphene the physical property the advantages of.Thus, the present invention has good application value.

Description

Liquid CO2Graphene fragment film build method is integrated in sedimentation

One, technical field:

The present invention relates to the modified deformation processing of new material, specifically a kind of liquid CO₂Graphene fragment is integrated in sedimentation Film build method.

Two, background technique:

Graphene with its electricity, calorifics, in terms of the common concern by society of brilliant advantages characteristic, performance And attention, referred to as overturn the new material in the world, become relevant industry personnel, unit, the hot topic of enterprise, research object and Fall over each other the popular industry of exploitation.For example only just have the unit or mechanism of upper hundred research and development and production graphene within the border in Shandong Province, Currently, the graphene research and development and production in China are taken its place in the front ranks of the world, but most of research and development exist more the dispersion of people's wealth, The repeat mode that small scale, level are low, do things in his own way, is stereotyped, advancing side by side.It produces result, goes out product, goes out benefit as general Time pursue a goal, fashion agitation that is eager for instant success and quick profits, following the fashion, chase after public attention, rob project is entirely possible to various countries at one The leading impetus is lost in starting line, the Chinese graphene status that China occupies many advantages.

Although the mankind just have found and test the dysmorphism that confirmation carbon has Two dimensional Crystallization in the nineties in last century Body existence form, i.e. graphene, but the universal awareness and understanding graphene of people is from An Deliegaimu in 2004 and Constant Ding Nuowoxiao love is successfully separated out graphene from graphite, and therefore in acquisition Nobel Prize in physics in 2010 's.They finally obtain the graphene of single layer of carbon atom Two dimensional Crystallization by using the multiple stickup and removing of adhesive tape.They Test and its process, also demonstrate at least: first, the graphite of pure carbon atom is in adhesive tape multiple stickup and stripping process, most The carbon atom of single layer can be retained in glue surface eventually.Second, only in single layer of carbon atom under the conditions of orderly two-dimensional arrangements, ability Starting and the atomic power for concentrating carbon atom, all establish the crystalline substance of covalent bond on unified two-dimensional directional with adjacent three carbon atoms Body structural relation.Graphite in nature is unable to nature evolution and generates graphene, is because in three-dimensional graphite stack body, often A carbon atom is all in the three-dimensional state mutually surrounded, inherence atomic power possessed by each atom with the more carbon atoms in periphery All comprehensive, impartial dispersion acts on three-dimensional all directions, can not assemble to form the critical kinetic energy for establishing covalent bond.

The graphene that the mankind are had found and confirmed special nature free from worldly cares and performance temptation, generate as pursuing carbon The same fanaticism of the diamond of another paramorph, causes the research to surge forward and great upsurge in production is inevitable and can manage Solution.

Current commercial production graphene approach mainly has physical method: as micromechanics stripping method, seal cut transfer print Method, template etc.；Chemical method: as aoxidized --- reduction method, solution stripping method, heating Si-C method, chemical vapour deposition technique, oxygen Change 22 reduction methods of dispersion etc..The graphene product in the above way produced is in grey moth shape more, claims Graphene powder, and volume increasing is expanded Hundreds times, actually the graphene fragment for tiny mixed and disorderly unordered accumulation, referred to as powdered graphite alkene fragment are more appropriate accurate.Graphite The height superiority and inferiority of alkene product quality, mainly with the graphene shive content of two dimensional crystal, the two dimensional crystal piece number of plies and fragment area The main indicators such as size and it is different, this greatly differs from each other with the two-dimensional concept infinitely extended in common people's idea to four-way, with have and It greatly differs from each other with complete, the continuous graphite alkene structure for embodying graphene whole physicochemical property and performance.

Only with the graphene of above-mentioned such method production, shown in numerous experimental studies and application practice free from worldly cares Performance and function, more mysterious and important properties and function need to be cracked and verify.It is different but for As-Is Enterprise, the graphene product produced using distinct methods, there is greatest differences for performance and function, cause the original of this species diversity Cause, natural be in the product in the number, fragment of graphene content the two-dimentional chip number of plies number and fragment continuous surface Long-pending size.But have ignored here one it is of equal importance, equally restrict such graphene product performance it is important because Element --- the i.e. arrangement order problem of graphene fragment.

Why graphene has comprehensive physical and chemical aspect, the especially brilliant advantage of electricity, calorifics, mechanics etc. Characteristic and performance, by the concern and attention of society, the reason is that each carbon atom is one in the chemical structure of graphene Uniformly it is connected with three carbon atoms in a plane, the stable Two dimensional Crystallization body with the combination of well-set covalence key of forming properties, It and is unique a kind of substance with Two dimensional Crystallization property that the mankind have found in nature up to now.The two of graphene It ties up in structure, electronics movement, heat transfer and stretching tension etc. all have the stringent directionality rule consistent with its structure, Only continuous whole two dimensional crystal structure, it is radial to be just able to achieve electricity, heat, the optimum transfer of power.In powdered graphite alkene fragment In unordered set body, the conduction of electricity, heat, power is completed along the directivity curve of each graphene fragment monomer, with its whole essence There are huge spreads for advantage performance.

It is used in field what special nature free from worldly cares, the powerful performance using graphene acted on, the optimal morphology of graphene Unquestionable optimal case be with use environment it is isometric, etc. it is wealthy, etc. the continuous graphite alkene chip of shapes or the stone of superimposion Black alkene wafer article.The production continuous graphite alkene chip scheme being confirmed in experiment first is that most simple and easy tape-stripping is shelled From, but problem is that single-layer graphene wafer thickness only has 0.335nm, application range is extremely limited.Obtain the graphite of 1mm thickness Alkene plate or band need about 3,000,000 layers of graphene wafer superimposion.The arduous degree of its work as one can imagine, it is reasonable to Suspect its possibility, practicability problem.

Therefore, it is still being difficult to continuously infinitely extend with two sides at present, the industrial volume production in a manner of infinite expanding of continuing in all directions How complete graphene two dimension chip instantly, realizes two dimension splicing or longitudinally perpendicular transversely and horizontally between graphene fragment The folded row of three-dimensional realizes the ordering arrangement in the subtle composition of graphene fragment manufactured goods, still can yet be regarded as and make up graphene fragment not Foot, makes its performance and function closer to the effective ways of complete graphene essential attribute.

Three, summary of the invention:

The purpose of the present invention is be directed to the status of above-mentioned industrial volume production graphene and people to the higher demand of graphene Target, provides a kind of simple using facility, and application technology is mature, can significantly promote the liquid of existing graphene property quality CO₂Graphene fragment film build method is integrated in sedimentation.

The purpose of the present invention is what is be achieved through the following technical solutions:

A kind of liquid CO₂Graphene fragment film build method, including powdery graphite alkene, liquid CO are integrated in sedimentation₂, insulation barrel, Blender, evaporating pan hold in the palm film and flutter device, it is characterized in that the whirling motion by the blender in sealing thermal insulation bucket is stirred, will by than The powdery graphite alkene and liquid CO of example strict measurement₂It is allocated as even density suspension, is poured into to set index and is covered with support film Evaporating pan, through flutter device oscillation after stand, graphene sedimentation, liquid CO₂Evaporation, to form and obtain graphene film in trying to get to the heart of a matter Piece.

The liquid CO₂Graphene fragment film build method is integrated in sedimentation, it is characterized in that setting different sizes and shapes Evaporating pan, configures the suspension of various concentration, and the suspension of different number is poured into evaporating pan, produce more specifications, model and The graphene diaphragm of density.

The liquid CO₂Graphene fragment film build method is integrated in sedimentation, it is characterized in that the setting of several evaporating pans is being turned On disk or circulation conveying band, the production line automatically or semi-automatically continuously run is formed.

Liquid CO of the invention₂Sedimentation integrates graphene fragment film build method compared with prior art, has simple process, The easily-controllable feature of production process, in addition, also having following many advantages:

1, because of liquid CO₂Liquid CO is added in characteristic with ultra-low viscosity and superpower adsorptivity, powdered graphite alkene₂In, easily Exist with free microplate monomer, is easily formed the suspension uniformly blended under blender effect.Convenient for calculating quantitative suspension Interior graphene content.

2, because of liquid CO₂Has ultra-low viscosity, the physical characteristic of superpower mobility and superpower adsorptivity pours into suspension The universe that paves easily is formed after horizontal evaporating pan waits deep uniform state.

3, powdered graphite alkene microplate is regardless of size, is the laminated structure of single layer of carbon atom Two dimensional Crystallization, and 2.25 Specific gravity be much larger than liquid CO₂1.101 specific gravity, in the low-resistance liquid CO of ultra-low viscosity₂In, especially under the effect of flutter device, It easily successively successively laminates, is fallen on the support film in evaporating pan in a horizontal manner, formation is orderly horizontally arranged, more graphite The complete performance of alkene and function physical property, it is more convenient the graphene diaphragm of application.

4, graphene microchip is in sedimentation, it may occur that the collision of edge-to-edge is docked, and free carbon atom can also be incorporated into stone Black alkene microplate edge extends graphene microchip and expands, further increases the Inherent advantage performance of film forming graphene.

5, the setting support film in evaporating pan, is easier to remove after graphene can be made to form a film, and is also more convenient MULTILAYER COMPOSITE processing And application, pallet can be attached in as insulating layer, also peelable naked use.

6, graphene diaphragm is processed through the invention, can pass through setting different size and form according to user demand Evaporating pan produce various specifications using control measures such as quantity, the concentration for pouring into evaporating pan suspension, shapes and sizes Graphene diaphragm.

7, by the graphene diaphragm to pressure roller to pressure disposition production, the density of diaphragm can be further increased, diaphragm is promoted Physical strength and conduction, heating conduction.

Four, Detailed description of the invention:

Without attached drawing.

Five, specific embodiment:

Connected applications practice is made to be described in detail further below to the present invention:

It is manufactured with the production scale of planning and is able to bear supercritical pressure, facilitate metering, the fixation for conveniently feeding intake and discharging The blender of sensible insulation barrel middle and lower part is arranged in the upper arched roof sealing cover center of insulation barrel in volume confinement insulation barrel.Evaporating pan It for the tray that floor height is smooth, is placed on the continuous horizontal platform that can steadily move, flutter device is set to mobile platform and rises Beginning portion.Support film bubble-free is laid in the entire bottom surface of evaporating pan.

In application practice, the Graphene powder of strict measurement is taken, is added to the liquid CO of same strict measurement₂In insulation barrel, It is stirred evenly after sealing, pours into graphene liquid CO by set amount₂Suspension is moved back through the oscillation of flutter device to one in evaporating pan Side is stood, to liquid CO₂It volatilizees back, the stone diaphragm of sizing is taken out together with support film.

Above-mentioned application practice is only a kind of specific embodiment of technical solution of the present invention, all with liquid CO₂As carrier, Pass through liquid CO₂Suspension, sedimentation, centrifugation it is selected processing and optimization graphene moral character methods, all in the application right In claimed technical scope.

Except for the technical features described in the specification, remaining is the known technology of those skilled in the art.

Claims

1. a kind of liquid CO₂Graphene fragment film build method, including powdery graphite alkene, liquid CO are integrated in sedimentation₂, insulation barrel stirs Device is mixed, evaporating pan holds in the palm film and flutter device, it is characterized in that the whirling motion by the blender in sealing thermal insulation bucket is stirred, it will in proportion The powdery graphite alkene and liquid CO of strict measurement₂It is allocated as even density suspension, is poured into to set index and be covered with support film Evaporating pan is stood after the oscillation of flutter device, graphene sedimentation, liquid CO₂Evaporation, to form and obtain graphene diaphragm in trying to get to the heart of a matter.

2. liquid CO according to claim 1₂Graphene fragment film build method is integrated in sedimentation, it is characterized in that setting is different big Small and shape evaporating pan, configures the suspension of various concentration, and the suspension of different number is poured into evaporating pan, produces more rule The graphene diaphragm of lattice, model and density.

3. according to " liquid CO₂Graphene fragment film build method is integrated in sedimentation ", it is characterized in that by the setting of several evaporating pans in turntable or On circulation conveying band, the production line automatically or semi-automatically continuously run is formed.