CN107899551A - Amino group graphene/cellulose acetate composite material and its application containing polypyrrole - Google Patents
Amino group graphene/cellulose acetate composite material and its application containing polypyrrole Download PDFInfo
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- CN107899551A CN107899551A CN201710941999.3A CN201710941999A CN107899551A CN 107899551 A CN107899551 A CN 107899551A CN 201710941999 A CN201710941999 A CN 201710941999A CN 107899551 A CN107899551 A CN 107899551A
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The present invention discloses a kind of amino group graphene/cellulose acetate composite material containing polypyrrole and its application, and production method is first by graphene oxide(GO)It is configured to the solution of 1mg/ml, taking the 50ml solution, supersonic freeze drying obtains amination graphene oxide solution in a water bath, then the alkaline solution of amination graphene oxide suspension and cellulose diacetate is mixed, mixed liquor is stirred, mechanical shearing or ultrasound, most polymerize to obtain through pyrrole monomer afterwards.The graphene of the amino group containing polypyrrole/cellulose acetate composite material prepared by the present invention has the property of acetate fiber, graphene oxide and polypyrrole concurrently;Paper, film or textile etc. made of the composite material are expected to be widely used in water body purification, metal ion enrichment, ultracapacitor, the multiple fields such as lithium ion battery, antistatic or shielding material, conductive film.
Description
Technical field
The invention belongs to materials science field, and in particular to a kind of amino group graphene/vinegar containing polypyrrole
Acid cellulose composite material and its application.
Background technology
Cellulose is natural biologic material, the rich reserves in nature, has excellent mechanical property, biological can be dropped
Solution.But there are many hydroxyl groups on native cellulose main chain, intermolecular and intramolecular forms a large amount of hydrogen bonds, makes the cellulose be difficult
Dissolving or melting.Substantial amounts of cellulose derivative is developed at present, including cellulose acetate, cellulose ether, cellulose connect
Graft copolymer and cellulose esters.
Derivative of the cellulose diacetate fibers as natural polymer cellulose, itself is nonpoisonous and tasteless, can be selective
Absorption around noxious material, antibacterial, bacteriostasis are good, and have good biocompatibility and biodegradability, are
A kind of environmentally friendly material.Industrial Celluloseacetate cigarette filter tow section is Y-shaped, and specific surface area is big, adsorption capacity
By force, resistance to suction is smaller, and filter effect is notable, itself is nonpoisonous and tasteless, can adsorb peculiar smell, and can selectively adsorb surrounding Toxic
Matter.
Graphene oxide (graphene oxide, GO) is the oxide of graphene, its color is brown color, on the market often
The product seen has powdered, sheet and solution shape.After oxidized, oxygen-containing functional group increases and makes property compared with graphite thereon
Alkene is more active, can improve nature via the various and reaction of oxygen-containing functional group.Graphene oxide can be considered a kind of non-
The flexible material of conventional configuration, has polymer, colloid, film, and the characteristic of amphiphatic molecule.Graphene oxide is for a long time
It is considered as hydroaropic substance, because it has superior dispersiveness in water, still, related experiment is the results show that graphite oxide
Alkene is of virtually amphipathic, and hydrophilic to hydrophobic property distribution is presented from graphene platelet edge to center.
The oxy radical of surface of graphene oxide mainly has the oxy radicals such as-OH, C-O-C, COO-, easily divides with cellulose
Form hydrogen bond between sub- hydroxyl, at the same the hydroxyl that enriches of cellulose surface and C-H can be formed with graphene CH- π interactions,
Electrostatic interaction.Therefore it is graphene is compound with cellulose, the tensile property, electric conductivity and calorifics of cellulose can be improved
Performance etc..In addition, the steric effect of cellulose can also promote the stable dispersion of graphene oxide in the solution.Researcher is by oxygen
Aeroge is made as the crosslinking agent of cellulose in graphite alkene piece (GOS), and compressive strength improves 30%, and modulus improves 90%,
Illustrate that there is interaction between graphene oxide and cellulose.
The amination modification of graphene is considered as one of most effective method of modifying, is drawn in surface of graphene oxide
Enter amino, hydrophily, the polarity of graphene surface can be improved, and then improve its dispersiveness in the polymer, and in graphite
Hydrogen bond or chemical bond are formed between alkene and polymer;, can be with other many compounds meanwhile amino has higher reactivity
React, so that dispersiveness of the graphene after amination in the resins such as epoxy resin, polyamide is improved, carry
The high enhancing effect to composite material thus it is in widespread attention.Amination modification to graphene, mainly there is two kinds at present
Method:A kind of method be to graphene oxide carry out chloride modification, further using acid chloride groups it is active with it is amic
It is grapheme modified that amino reaction prepares amination;Another method is to make the carboxyl on graphene oxide and ammonification using condensing agent
It is grapheme modified that the amino of thing carries out each amination of condensation reaction system.
Polypyrrole (polypyrrole, PPy), has conductivity high, and nontoxic, environmental stability is good, is easy to doping and spy
The characteristics such as different light, electricity, sound.Cellulose nanocrystal is added in composite material, is remarkably improved heat endurance, the power of material
Learn intensity, hardness, rigidity and pliability.This kind of novel nanocomposite materials can be used for chemical sensor or anti-static coatings
Formula, can improve the mechanical property of electrical-conductive nanometer material.In recent years, the personnel that make internal disorder or usurp are ground and find that polypyrrole, polyaniline have a huge sum of money
Belong to ionic adsorption performance, often by polypyrrole, polyaniline be fixed on inorganic nanoparticles be used for heavy metal ion absorption, and incite somebody to action
Polypyrrole be fixed on grinding on amination graphene oxide/cellulose acetate composite material make internal disorder or usurp it is less.Therefore, research and development contain
Amination graphene oxide/cellulose acetate composite material of polypyrrole, and it is played in more necks such as conductive, absorption, load medicines
Domain application is of great significance.
The content of the invention
The present invention seeks to be to provide a kind of amino group graphene/cellulose acetate composite material containing polypyrrole
And its application, the preparation method of the composite material use simple aqueous systems process, reaction condition is gentle, equipment requirement
It is low, easy to large-scale production, it is cheap and easy to get and pollution-free to be related to raw material.Prepared composite material has acetate fiber, oxidation concurrently
The function of graphene and polypyrrole, in electrochemistry, absorption, carries the multiple fields such as medicine and is widely used, have it is preferable economical and
Social benefit.
The technical solution adopted in the present invention is:A kind of amino group graphene/cellulose acetate containing polypyrrole is multiple
Condensation material, its preparation method are:
First by graphene oxide(GO)The solution of 1mg/ml is configured to, takes the 50ml solution ultrasonic in a water bath, then, weighs
The N of 15mg, N- dimethyl-ethylenediamine or N, N- diethyl ethylenediamine are added in GO solution, add 12mg 1- ethyls-(3-
Dimethylaminopropyl) phosphinylidyne diimmonium salt hydrochlorate(EDC.HCl), 100 mg n-hydroxysuccinimides(NHS)And 12mg
4-dimethylaminopyridine(DMAP), the stirring reaction 24h under 25 °C, solution centrifuged under 6000 turns after the completion of reaction 1 it is small when,
Supernatant liquor is given up, lower floor's material is washed with deionized three times repeatedly, when freeze-drying 12 is small, that is, obtains amination oxidation
Graphene solution;
Then the alkaline solution of amination graphene oxide suspension and cellulose diacetate is mixed, mixed liquor is stirred
Mix, mechanical shearing or ultrasound, acquisition amination graphene oxide/cellulose composite material, alkaline solution are:Sodium carbonate or hydrogen-oxygen
Change sodium, urea, thiocarbamide and deionized water by weight 1-10:4-10: 0-10 :70-95 is sufficiently mixed;
Finally, by amination graphene oxide/cellulose acetate composite material with deionized water dissolving ultrasound into suspension, add
Pyrrole monomer, then dopant NaCl, the DBSNa of the amount of material such as it is separately added into, oxidant is then slowly added to while stirring
After FeCl3 6H2O, pyrrole monomer polymerization 6-24h, the suspension of gained, reprecipitation ultrasound point in deionized water are centrifuged
Washing is dissipated, until the supernatant liquid for centrifuging gained is in neutrality, product is placed in Buchner funnel, uses miillpore filter mistake
Filter, is freeze-dried 24 h, it is multiple that grinding obtains amination graphene oxide/cellulose acetate that black contains polypyrrole by sediment
Condensation material powder.
Preferably, the alkaline solution of the cellulose diacetate and the miscible ratio of amination graphene oxide suspension
For 1:1~10:1.
Preferably, the alkaline solution of amination graphene oxide suspension and cellulose diacetate is mixed to get amino
Change comprising the following steps that for graphene oxide/cellulose acetate composite material:
1) by amination graphene oxide deionized water dissolving, the ultrasound in the ultrasonic unit that power is 300-1000W
0.5-5h, obtains finely dispersed amination graphene oxide suspension;
2) by sodium carbonate or sodium hydroxide, urea, thiocarbamide and deionized water by weight 1-10: 4-10 : 0-10 :
70-95 is sufficiently mixed;
3) and then cellulose acetate suspension is added, is stirred under -10 to 20 °C, filtration washing after mechanical shearing or ultrasound 12-24h
Obtain amination graphene oxide/cellulose acetate composite material.
Preferably, in pyrrole monomer polymerisation, pyrrole monomer quality for cellulose diacetate quality 10% ~
100%。
Preferably, the graphene oxide is single-layer graphene oxide, multilayer graphene oxide or the two is mixed
Compound.
Preferably, in the preparation of amination graphene oxide solution, selected amino fragment is N, N- dimethyl
Ethylenediamine or N, N- diethyl ethylenediamine, condensing agent select EDC.HCl and NHS.
The composite material of the present invention is being adsorbed and purified to the exhaust gas containing organic matter and/or heavy metal ion, waste water
Application.
The composite material of the present invention is for answering in terms of conductive composite film, ultracapacitor, electrode and electrocatalysis material
With.
The beneficial effects of the present invention are:The graphene of the amino group containing polypyrrole/acetic acid prepared by the present invention is fine
The plain composite material of dimension has the property of acetate fiber, graphene oxide and polypyrrole concurrently, such as the preferable toughness of acetate fiber, film forming
Property, spinnability and adsorptivity, the high surface reaction activity of graphene oxide, unique electricity, magnetic property, absorption property etc. gather
Pyrroles has unique electric conductivity, absorption heavy metal ability;Paper, film or textile etc. are expected to made of the composite material
Water body purification, metal ion enrichment, ultracapacitor, multiple necks such as lithium ion battery, antistatic or shielding material, conductive film
Domain is widely used;The present invention uses simple aqueous systems process at the same time, and reaction condition is gentle, and equipment requirement is low, just
In large-scale production, it is cheap and easy to get and pollution-free to be related to raw material.Prepared composite material has acetate fiber, graphene oxide concurrently
And the function of polypyrrole, it is widely used in multiple fields such as electrochemistry, absorption, load medicines, there is preferable economic and social effect
Benefit.
Embodiment
The present invention is described in further detail below in conjunction with specific embodiment.
A kind of amino group graphene/cellulose acetate composite material containing polypyrrole, its preparation method are:
First by graphene oxide(GO)It is configured to the solution of 1mg/ml, the graphene oxide is single-layer graphene oxide,
Multilayer graphene oxide or the mixture of the two, take the 50ml solution ultrasonic in a water bath, then, weigh the N of 15mg, N- bis-
Methyl ethylenediamine or N, N- diethyl ethylenediamine are added in GO solution, add 12mg 1- ethyls-(3- dimethylaminos third
Base) phosphinylidyne diimmonium salt hydrochlorate(EDC.HCl), 100 mg n-hydroxysuccinimides(NHS)With 12mg 4- dimethylamino pyrroles
Pyridine(DMAP), the stirring reaction 24h under 25 °C, solution centrifuged under 6000 turns after the completion of reaction 1 it is small when, supernatant liquor is given up
Abandon, lower floor's material is washed with deionized three times repeatedly, when freeze-drying 12 is small, that is, obtains amination graphene oxide solution;
In the preparation of amination graphene oxide solution, selected amino fragment is N, N- dimethyl-ethylenediamines or N, N- diethyl
Ethylenediamine, condensing agent select EDC.HCl and NHS.
Then the alkaline solution of amination graphene oxide suspension and cellulose diacetate is mixed, two acetic acid are fine
It is 1 to tie up the alkaline solution of element and the miscible ratio of amination graphene oxide suspension:1~10:1, mixed liquor is stirred,
Mechanical shearing or ultrasound, obtain amination graphene oxide/cellulose composite material, and alkaline solution is:Sodium carbonate or hydroxide
Sodium, urea, thiocarbamide and deionized water are by weight 1-10:4-10: 0-10 :70-95 is sufficiently mixed;Comprise the following steps that:
1) by amination graphene oxide deionized water dissolving, the ultrasound in the ultrasonic unit that power is 300-1000W
0.5-5h, obtains finely dispersed amination graphene oxide suspension;
2) by sodium carbonate or sodium hydroxide, urea, thiocarbamide and deionized water by weight 1-10: 4-10 : 0-10 :
70-95 is sufficiently mixed;
3) and then cellulose acetate suspension is added, is stirred under -10 to 20 °C, filtration washing after mechanical shearing or ultrasound 12-24h
Obtain amination graphene oxide/cellulose acetate composite material.
Finally, by amination graphene oxide/cellulose acetate composite material with deionized water dissolving ultrasound into suspension,
Pyrrole monomer is added, pyrrole monomer quality is the 10% ~ 100% of cellulose diacetate quality, then the amount of material such as is separately added into
Dopant NaCl, DBSNa, are then slowly added to oxidant FeCl3 6H2O while stirring, after pyrrole monomer polymerize 6-24h, from
The separating obtained suspension of the heart, reprecipitation ultrasonic disperse in deionized water washs, until centrifuging the supernatant liquid of gained
It is in neutrality, product is placed in Buchner funnel, using filtering with microporous membrane, sediment is freeze-dried 24 h, grinding obtains black
Color contains amination graphene oxide/cellulose acetate composite powder of polypyrrole.
The composite material of the present invention is being adsorbed and purified to the exhaust gas containing organic matter and/or heavy metal ion, waste water
Application.
The composite material of the present invention is for answering in terms of conductive composite film, ultracapacitor, electrode and electrocatalysis material
With.
Embodiment:
1. by graphene oxide(GO)It is configured to the solution of 1mg/ml.Take the 50ml solution ultrasonic in a water bath, then, weigh
The N of 15mg, N- dimethyl-ethylenediamine are added in GO solution, add 12mg 1- ethyls-(3- dimethylaminopropyls) phosphinylidyne
Diimmonium salt hydrochlorate(EDC.HCl), 100 mg n-hydroxysuccinimides(NHS)With 12mg 4-dimethylaminopyridine
(DMAP), the stirring reaction 24h under 25 °C, solution centrifuged under 6000 turns after the completion of reaction 1 it is small when, supernatant liquor is given up
Abandon, lower floor's material is washed with deionized three times repeatedly, when freeze-drying 12 is small, that is, obtains amination graphene oxide.
2. amination graphene oxide 0.5g is taken to be dissolved in deionized water, in the ultrasonic unit that power is 300-1000W
Middle ultrasound 0.5-5h, obtains finely dispersed amination graphene oxide suspension;By sodium carbonate, urea, thiocarbamide and go from
Sub- water is by weight 5: 8 : 6 :81 are sufficiently mixed;3) then add 1.0g cellulose acetate suspensions ,-10-20 °C
Filtration washing obtains amination graphene oxide/cellulose acetate composite material after lower stirring, mechanical shearing or ultrasound 12-24h.
3. by obtained amination graphene oxide/cellulose acetate composite material 15ml deionized water dissolvings ultrasound
Into suspension.0.5g pyrrole monomers are added, then dopant NaCl, the DBSNa of the amount of material such as are separately added into, then while stirring
It is slowly added to 0.3g oxidant FeCl3 6H2O.Pyrrole monomer polymerization 12h after, centrifuge gained suspension, reprecipitation in
Ultrasonic disperse washs in deionized water, until the supernatant liquid for centrifuging gained is in neutrality.Product is placed in Buchner funnel,
Use filtering with microporous membrane.Sediment is freeze-dried 24 h, grinding obtains the amination graphite oxide that black contains polypyrrole
Alkene/cellulose acetate composite powder.
4. heavy metal adsorption measuring
Suitable copper nitrate or potassium bichromate crystal is taken with electronic analytical balance, is dissolved in suitable deionized water, is made into 100
Cu (II) solution of ppm or so or Cr (VI) solution of 100 ppm.The Cu (II) of remaining concentration, Cr (VI) solution needed for experiment
The 100ppm solution that can be prepared by diluting oneself obtains.
In order to test the adsorption effect of rear adsorbent before modified, by common acetate fiber, graphene oxide and more containing poly-
The amino group graphene of pyrroles/three kinds of cellulose acetate sorbing material, is respectively charged into 50 mL Cu (II) ion concentrations as 100
In ppm copper nitrate solutions or the conical flask that 50 mL Cr (VI) ion concentrations are 100 ppm potassium bichromate solutions, at room temperature,
4 h are adsorbed in persistent oscillation.The concentration of Cu (II) ion passes through plasma atomic emission spectrometer (ICP- in solution before and after absorption
OES) measure.
Experimental result is shown:Common acetate fiber, graphene oxide and amino group graphene/acetic acid containing polypyrrole
Cellulose iii kind sorbing material has very big difference to Cu (II), the adsorption capacity of Cr (VI) ion.Test result indicates that containing poly-
Amino group graphene/cellulose acetate of pyrroles compares acetate fiber to Cu in solution (II), the adsorption capacity of Cr (VI) ion
Large increase is obtained for graphene oxide.The different sorbing materials of about 0.1 g are respectively put into containing 50 mL Cu ions
In the potassium bichromate solution that the copper nitrate solution or 50 mL Cr ion concentrations that concentration is 88.7 mg/L are 96.6mg/L, contain
Amino group graphene/cellulose acetate sorbing material of polypyrrole respectively reaches the adsorbance of Cu (II) and Cr (VI) ion
28.5 and 33.1 mg/g, the adsorbance without modified acetate fiber and graphene oxide sorbing material to Cu (II) ion
Respectively 1.7 mg/g and 3.8 mg/g, the adsorbance to Cr (VI) ion is respectively 0.8 mg/g and 2.7 mg/g.Thus say
Bright amino group graphene/cellulose acetate adsorption composite material of the invention containing polypyrrole is inhaled with good heavy metal
Attached ability.
5. amino group graphene/cellulose acetate composite material that 5 mg contain polypyrrole is taken to be dissolved in 10 ml steamings first
In distilled water, ultrasonic 1h is dispersed.Take 10 μ L solution to drop in glassy carbon electrode surface, working electrode is used as after natural drying.With
0.5N dilution heat of sulfuric acid is as electrolyte.The glass-carbon electrode of adhesion composite material is working electrode, and platinum filament is to electrode, Ag/
AgCl electrodes carry out charge-discharge test and cyclic voltammetry for the three-electrode system of reference electrode, and test voltage scope is -0.1
~0.8V, with pure polypyrrole material as a comparison.
According to test result, the amino group graphene containing the polypyrrole/purer polypyrrole of cellulose acetate composite material
There is preferable electrochemical capacitor.In 5-10mV/S, scanning curve is similar to rectangle, with sweep speed increase, CV curves by
Gradually deviate " rectangle ", weaken this is because the impedance inside composite electrode makes to interact between ion and electrode.May be used also
To find out, under identical sweep speed, the integral area of the CV curves of composite material is significantly higher than the area of pure polypyrrole, says
Bright amino group graphene/cellulose acetate composite material containing polypyrrole has the electro-chemical activity of higher.
The above, is only present pre-ferred embodiments, therefore the scope implemented of the present invention cannot be limited with this, i.e., according to
The equivalent changes and modifications that scope of the present invention patent and description are made, all should still belong to the model that patent of the present invention covers
In enclosing.
Claims (8)
- A kind of 1. amino group graphene/cellulose acetate composite material containing polypyrrole, it is characterised in that:Its preparation method For:First by graphene oxide(GO)The solution of 1mg/ml is configured to, takes the 50ml solution ultrasonic in a water bath, then, weighs The N of 15mg, N- dimethyl-ethylenediamine or N, N- diethyl ethylenediamine are added in GO solution, add 12mg 1- ethyls-(3- Dimethylaminopropyl) phosphinylidyne diimmonium salt hydrochlorate(EDC.HCl), 100 mg n-hydroxysuccinimides(NHS)And 12mg 4-dimethylaminopyridine(DMAP), the stirring reaction 24h under 25 °C, solution centrifuged under 6000 turns after the completion of reaction 1 it is small when, Supernatant liquor is given up, lower floor's material is washed with deionized three times repeatedly, when freeze-drying 12 is small, that is, obtains amination oxidation Graphene solution;Then the alkaline solution of amination graphene oxide suspension and cellulose diacetate is mixed, mixed liquor is stirred Mix, mechanical shearing or ultrasound, acquisition amination graphene oxide/cellulose composite material, alkaline solution are:Sodium carbonate or hydrogen-oxygen Change sodium, urea, thiocarbamide and deionized water by weight 1-10:4-10: 0-10 :70-95 is sufficiently mixed;Finally, by amination graphene oxide/cellulose acetate composite material with deionized water dissolving ultrasound into suspension, add Pyrrole monomer, then dopant NaCl, the DBSNa of the amount of material such as it is separately added into, oxidant is then slowly added to while stirring After FeCl3 6H2O, pyrrole monomer polymerization 6-24h, the suspension of gained, reprecipitation ultrasound point in deionized water are centrifuged Washing is dissipated, until the supernatant liquid for centrifuging gained is in neutrality, product is placed in Buchner funnel, uses miillpore filter mistake Filter, is freeze-dried 24 h, it is multiple that grinding obtains amination graphene oxide/cellulose acetate that black contains polypyrrole by sediment Condensation material powder.
- 2. a kind of amino group graphene/cellulose acetate composite material containing polypyrrole according to claim 1, its It is characterized in that:The alkaline solution of the cellulose diacetate and the miscible ratio of amination graphene oxide suspension are 1:1~ 10:1。
- 3. a kind of amino group graphene/cellulose acetate composite material containing polypyrrole according to claim 1, its It is characterized in that:The alkaline solution of amination graphene oxide suspension and cellulose diacetate is mixed to get amination oxidation stone Black alkene/cellulose acetate composite material comprises the following steps that:1) by amination graphene oxide deionized water dissolving, the ultrasound in the ultrasonic unit that power is 300-1000W 0.5-5h, obtains finely dispersed amination graphene oxide suspension;2) by sodium carbonate or sodium hydroxide, urea, thiocarbamide and deionized water by weight 1-10: 4-10 : 0-10 : 70-95 is sufficiently mixed;3) and then cellulose acetate suspension is added, is stirred under -10 to 20 °C, filtration washing after mechanical shearing or ultrasound 12-24h Obtain amination graphene oxide/cellulose acetate composite material.
- 4. a kind of amino group graphene/cellulose acetate composite material containing polypyrrole according to claim 1, its It is characterized in that:In pyrrole monomer polymerisation, pyrrole monomer quality is the 10% ~ 100% of cellulose diacetate quality.
- 5. a kind of amino group graphene/cellulose acetate composite material containing polypyrrole according to claim 1, its It is characterized in that:The graphene oxide is single-layer graphene oxide, multilayer graphene oxide or the mixture of the two.
- 6. a kind of amino group graphene/cellulose acetate composite material containing polypyrrole according to claim 1, its It is characterized in that:In the preparation of amination graphene oxide solution, selected amino fragment is N, N- dimethyl-ethylenediamines or N, N- diethyl ethylenediamine, condensing agent select EDC.HCl and/or NHS.
- 7. a kind of amino group graphene/cellulose acetate composite material containing polypyrrole according to claim 1 Using, it is characterised in that:The application that exhaust gas containing organic matter and/or heavy metal ion, waste water are adsorbed and purified.
- 8. a kind of amino group graphene/cellulose acetate composite material containing polypyrrole according to claim 1 Using, it is characterised in that:For the application in terms of conductive composite film, ultracapacitor, electrode and electrocatalysis material.
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CN114249916A (en) * | 2022-01-12 | 2022-03-29 | 华尔科技集团股份有限公司 | Polymer composite film and electrostatic generator using same |
CN115449922A (en) * | 2022-09-26 | 2022-12-09 | 马鞍山皖烯新材料科技有限公司 | Preparation method of high-performance graphene fiber |
CN115449922B (en) * | 2022-09-26 | 2024-04-19 | 马鞍山皖烯新材料科技有限公司 | Preparation method of high-performance graphene fiber |
CN115715976A (en) * | 2022-11-29 | 2023-02-28 | 西安工业大学 | Method for selectively adsorbing lithium ions based on protein/inorganic nanoparticle composite membrane |
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