CN103665437A - Preparation method of bacterial cellulose/graphene composite material - Google Patents
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 239000002131 composite material Substances 0.000 title claims abstract description 57
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 51
- 229920002749 Bacterial cellulose Polymers 0.000 title claims abstract description 36
- 239000005016 bacterial cellulose Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 241000894006 Bacteria Species 0.000 claims abstract description 59
- 229920002678 cellulose Polymers 0.000 claims abstract description 58
- 239000001913 cellulose Substances 0.000 claims abstract description 57
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 47
- 239000010439 graphite Substances 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 9
- 239000006185 dispersion Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 11
- 230000002349 favourable effect Effects 0.000 abstract 1
- 235000010980 cellulose Nutrition 0.000 description 51
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 24
- 239000007864 aqueous solution Substances 0.000 description 20
- 230000015572 biosynthetic process Effects 0.000 description 19
- 238000003786 synthesis reaction Methods 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 239000000243 solution Substances 0.000 description 14
- 239000008367 deionised water Substances 0.000 description 11
- 229910021641 deionized water Inorganic materials 0.000 description 11
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- 230000007935 neutral effect Effects 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 5
- 150000001298 alcohols Chemical class 0.000 description 5
- 230000003252 repetitive effect Effects 0.000 description 5
- 238000005201 scrubbing Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 4
- 238000000855 fermentation Methods 0.000 description 4
- 230000004151 fermentation Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000001509 sodium citrate Substances 0.000 description 4
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 3
- WFJIVOKAWHGMBH-UHFFFAOYSA-N 4-hexylbenzene-1,3-diol Chemical compound CCCCCCC1=CC=C(O)C=C1O WFJIVOKAWHGMBH-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 150000001721 carbon Chemical group 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000052 vinegar Substances 0.000 description 3
- 235000021419 vinegar Nutrition 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 2
- 229930006000 Sucrose Natural products 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 2
- 229910000043 hydrogen iodide Inorganic materials 0.000 description 2
- 239000002054 inoculum Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000012279 sodium borohydride Substances 0.000 description 2
- 229910000033 sodium borohydride Inorganic materials 0.000 description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- PODWXQQNRWNDGD-UHFFFAOYSA-L sodium thiosulfate pentahydrate Chemical compound O.O.O.O.O.[Na+].[Na+].[O-]S([S-])(=O)=O PODWXQQNRWNDGD-UHFFFAOYSA-L 0.000 description 2
- 239000005720 sucrose Substances 0.000 description 2
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 2
- 229940038773 trisodium citrate Drugs 0.000 description 2
- 235000019154 vitamin C Nutrition 0.000 description 2
- 239000011718 vitamin C Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical compound C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 description 1
- 241000589158 Agrobacterium Species 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 241000589516 Pseudomonas Species 0.000 description 1
- 241000589180 Rhizobium Species 0.000 description 1
- 241000192023 Sarcina Species 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000003570 biosynthesizing effect Effects 0.000 description 1
- 238000013124 brewing process Methods 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000008166 cellulose biosynthesis Effects 0.000 description 1
- 150000001924 cycloalkanes Chemical class 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000012567 medical material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- -1 olefines Chemical class 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000008104 plant cellulose Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 229940001516 sodium nitrate Drugs 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- Carbon And Carbon Compounds (AREA)
Abstract
The invention belongs to the technical field of composite materials, and particularly relates to a preparation method of a bacterial cellulose/graphene composite material. A reducing bacteria cellulose/graphite oxide composite material is reduced to prepare the bacterial cellulose/graphene composite material. The method can be used for preparing the high-graphene-content bacterial cellulose/graphene composite material. Compared with the bacterial cellulose material, the bacterial cellulose/graphene composite material has more excellent mechanical properties and higher conductivity. The method is simple in technique, effectively widens the application range of the bacterial cellulose, and has favorable application prospects.
Description
Technical field
The invention belongs to technical field of composite materials, be specifically related to a kind of preparation method of bacterial cellulose/graphene composite material.
Background technology
Graphene (Graphene) is a kind of novel material of the individual layer sheet structure consisting of carbon atom.Be a kind ofly by carbon atom, with sp2 hybridized orbital, to form the flat film that hexangle type is honeycomb lattice, only have the two-dimensional material of a carbon atom thickness.Graphene has high strength (higher than carbon nanotube and diamond), high thermal conductivity coefficient (5300 W/mK), low-resistivity (approximately 10
-6Ω cm), high electron mobility (>15000 cm
2/ Vs) be the current material of resistivity minimum in the world.Can be used for matrix material, electronic industry, a plurality of fields such as new forms of energy.
Bacteria cellulose (Bacterial cellulose, BC) refers under different condition, the synthetic cellulosic general designation of certain microorganism in acetic acid Pseudomonas, Agrobacterium, rhizobium and Sarcina etc.People early just have been found that the material of bacteria cellulose in addition in ancient times, as just there being the record of fermented liquid surface formation gel mycoderm in vinegar brewing process in < < Qimin yaoshu > >.1976, Blang (R. M. Brown) and co-worker thereof described the motion of acetic bacteria in cellulose biosynthesis process first.The natural cellulose that bacteria cellulose and plant or marine alga produce has identical molecular structure unit, but bacteria cellulose fibre has the character of many uniquenesses.1. there is high-crystallinity (can reach 95%, plant cellulose be 65%) and the high polymerization degree (DP value 2 000～8 000); 2. there is hyperfine reticulated structure.More than several times to ten that 3. Young's modulus is general vegetable fibre times, and tensile strength is high; 4. there is very strong water-holding power.The WRV value of the bacteria cellulose of undried is up to more than 1000%, and the water-holding power after lyophilize still surpasses 600%.The ability of swelling again and linters through 100 ℃ of dried bacteria celluloses in water are suitable; 5. there is higher biocompatibility, adaptability and good biodegradability; 6. Modulatory character during bacteria cellulose biosynthesizing.Adopt different cultural methods, as static cultivation and dynamic cultivation, utilize acetic bacteria can obtain the Mierocrystalline cellulose of different higher structures.High physical strength while having very strong wetting ability, stability, good biocompatibility, liquids and gases perviousness and hygrometric state due to it, can be applied to medical material, foodstuffs industry, a plurality of fields such as paper industry.
Application number is that 201110063663.4 Chinese invention patent discloses a kind of bacterial cellulose/graphene composite material and preparation method thereof.Its preparation method is thereby that bacteria cellulose is immersed in graphene dispersing solution and is combined into bacterial cellulose/graphene composite material, has certain mechanical property and conductivity.But wherein due to reasons such as dispersivenesses, the mechanical property of matrix material and the raising of conductivity are limited.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of bacterial cellulose/graphene composite material.This material is composited by Graphene and bacteria cellulose, and with respect to bacteria cellulose material, this material has better mechanical property and the electric conductivity of Geng Gao.
Described a kind of bacterial cellulose/graphene composite material is composited by bacteria cellulose and Graphene.
Be dispersed in the reticulated structure of bacteria cellulose graphene uniform in described a kind of bacterial cellulose/graphene composite material.
The Graphene that above-mentioned Graphene comprises individual layer and the Graphene of multilayer.
In described bacterial cellulose/graphene composite material, the mass ratio of Graphene and bacteria cellulose is 0.0001 ~ 50:100; Be preferably 0.001 ~ 40:100; 0.01 ~ 40:100 more preferably; 1 ~ 40:100 more preferably again.
Described a kind of bacterial cellulose/graphene composite material is to prepare bacterial cellulose/graphene composite material by bacteria cellulose/oxidized graphite composite material being reduced process.
Above-mentioned graphite oxide is by obtaining graphite type material through oxide treatment.
Described reduction processing refers to bacteria cellulose/oxidized graphite composite material is immersed in the solution with reductibility, reacts 10 minutes ~ 72 hours at 10 ~ 100 ℃.
The solution of above-mentioned reductibility refers to the aqueous solution of PH=8 ~ 14 or the mixing solutions of water and alcohols.Be preferably the LiOH of 0.01 ~ 10mol/L concentration, NaOH, KOH, NH
3, N
2h
2, Ca (OH)
2, Ba (OH)
2, Ca (OH)
2and Mg (OH)
2in one or more the aqueous solution; The NaOH of 0.01 ~ 10mol/L concentration more preferably, KOH, NH
3and N
2h
2in one or more the aqueous solution.
The solution of above-mentioned reductibility refers to Trisodium Citrate, sodium borohydride, Sulfothiorine, vitamins C, hydrogen iodide, dihydroxy-benzene, the mixing solutions of the aqueous solution of one or more in phenylenediamine or water and alcohols.
The preparation method of described a kind of bacterial cellulose/graphene composite material implements as follows:
(1) preparation has the solution of reductibility;
(2) bacteria cellulose/oxidized graphite composite material is submerged in this solution;
(3) at 10 ~ 100 ℃, react 10 minutes ~ 72 hours;
(4) after taking-up, one or both in use deionized water and organic solvent wash away impurity, obtain bacteria cellulose/oxidized graphite composite material
In above-mentioned steps, the solution of the reductibility described in step (1) refers to the aqueous solution of PH=8 ~ 14 or the mixing solutions of water and alcohols.Be preferably the LiOH of 0.01 ~ 10mol/L concentration, NaOH, KOH, NH
3, N
2h
2, Ca (OH)
2, Ba (OH)
2, Ca (OH)
2and Mg (OH)
2in one or more the aqueous solution; The NaOH of 0.01 ~ 10mol/L concentration more preferably, KOH, NH
3and N
2h
2in one or more the aqueous solution.
In above-mentioned steps, the solution of the reductibility described in step (1) refers to Trisodium Citrate, sodium borohydride, Sulfothiorine, vitamins C, hydrogen iodide, dihydroxy-benzene, the mixing solutions of the aqueous solution of one or more in phenylenediamine or water and alcohols.
In above-mentioned steps, the graphite oxide in the bacteria cellulose/oxidized graphite composite material described in step (2) and the mass ratio of bacteria cellulose are 0.0001 ~ 50:100; Be preferably 0.0001 ~ 10:100; 0.01 ~ 10:100 more preferably.
In above-mentioned steps, the reaction described in step (3) can follow stir and ultrasonic in one or both.
In above-mentioned steps, the organic solvent described in step (4) can be alkanes, olefines, alcohols, carboxylic-acid, ester class, ethers, amine, ketone, cycloalkane, one or more of phenyl ring class and heterocyclic solvent.
Embodiment
Synthesis example 1
In container, add 100g graphite, the sulfuric acid of 50g SODIUMNITRATE and 2.2L98% concentration, slowly adds 300g potassium permanganate under ice bath.Under ice bath, react 1 hour, be warming up to 35 ℃ of reactions 2 hours, add fast 4.6L deionized water, be warming up to 98 ℃ of reactions 15 minutes.After being cooled to room temperature, slowly add hydrogen peroxide until without bubble, obtain golden yellow dispersion liquid.Repeatedly filter, washing, until pH value arrives 7 left and right, obtains graphite oxide dispersion liquid.Graphite oxide that must be dry after dry.
Synthesis example 2
With Sucus Cocois 90%, sucrose 9.8%, acetic acid 0.2%, be mixed with fermentation medium for bacterial cellulose, add wooden glucose vinegar acidfast bacilli seed liquor, 10%, 30 ℃ of standing for fermentation that inoculum size is culture volume is cultivated 5 days, collects the mycoderm that media surface forms.In the sodium hydroxide solution of 0.5 mol/L concentration, boil 10 minutes, more at room temperature in the sodium hydroxide solution of 0.5 mol/L concentration, soak 24 hours, with deionized water, be washed till neutrality, obtain moistening bacteria cellulose film.
Synthesis example 3
By synthesis example 1, prepare graphite oxide.By the moistening bacteria cellulose film of synthesis example 2 preparation.Dry graphite oxide is added in deionized water, disperse 10 minutes under the rotating speed of 150rpm, supersound process 20 minutes, prepares to obtain graphite oxide dispersion liquid.Get moistening bacteria cellulose film and immerse graphite oxide dispersion liquid, soak 2 hours.Take out bacteria cellulose product and obtain bacteria cellulose/oxidized graphite composite material.
Synthesis example 4
By synthesis example 1, prepare graphite oxide.Dry graphite oxide is added in the mixed solution containing Sucus Cocois 90%, sucrose 9.8% and acetic acid 0.2%, disperse 10 minutes under the rotating speed of 150rpm, supersound process 20 minutes, prepares to obtain the fermentation medium for bacterial cellulose of graphite oxide dispersion liquid.Add wooden glucose vinegar acidfast bacilli seed liquor, 10%, 30 ℃ of standing for fermentation that inoculum size is culture volume is cultivated 5 days, collects the mycoderm that media surface forms.Obtain bacteria cellulose/oxidized graphite composite material.
Embodiment 1
By synthesis example 3, prepare bacteria cellulose/oxidized graphite composite material, regulate the amount of each raw material to make the content of graphite oxide in this matrix material be about 0.001%.The sodium citrate aqueous solution of preparation 0.01mol/L.Bacteria cellulose/oxidized graphite composite material is submerged in sodium citrate aqueous solution.Under 90 degree, react 24 hours.Extremely neutral with deionized water repetitive scrubbing after taking out, obtain bacterial cellulose/graphene composite material.Graphene in gained matrix material and the mass ratio of bacteria cellulose are about 0.0006:100.
Embodiment 2
By synthesis example 3, prepare bacteria cellulose/oxidized graphite composite material, regulate the amount of each raw material to make the content of graphite oxide in this matrix material be about 0.01%.The N of preparation 0.1mol/L
2h
2the aqueous solution.Bacteria cellulose/oxidized graphite composite material is submerged into N
2h
2in the aqueous solution.Under 80 degree, react 12 hours.Extremely neutral with deionized water repetitive scrubbing after taking out, obtain bacterial cellulose/graphene composite material.Graphene in gained matrix material and the mass ratio of bacteria cellulose are about 0.006:100.
Embodiment 3
By synthesis example 3, prepare bacteria cellulose/oxidized graphite composite material, regulate the amount of each raw material to make the content of graphite oxide in this matrix material be about 0.1%.The ammonia soln of preparation 1mol/L.Bacteria cellulose/oxidized graphite composite material is submerged in ammonia soln.Under 50 degree, react 48 hours.Extremely neutral with deionized water repetitive scrubbing after taking out, obtain bacterial cellulose/graphene composite material.Graphene in gained matrix material and the mass ratio of bacteria cellulose are about 0.06:100.
Embodiment 4
By synthesis example 4, prepare bacteria cellulose/oxidized graphite composite material, regulate the amount of each raw material to make the content of graphite oxide in this matrix material be about 1%.The KOH aqueous solution of preparation 10mol/L.Bacteria cellulose/oxidized graphite composite material is submerged in the KOH aqueous solution.Under 10 degree, react 72 hours.Extremely neutral with deionized water repetitive scrubbing after taking out, obtain bacterial cellulose/graphene composite material.Graphene in gained matrix material and the mass ratio of bacteria cellulose are about 0.6:100.
Embodiment 5
By synthesis example 4, prepare bacteria cellulose/oxidized graphite composite material, regulate the amount of each raw material to make the content of graphite oxide in this matrix material be about 10%.The dihydroxy-benzene aqueous solution of preparation 10mol/L.Bacteria cellulose/oxidized graphite composite material is submerged in the dihydroxy-benzene aqueous solution.Under condition at 100 degree with stirring, react 72 hours.Extremely neutral with deionized water and the washing of ethanol alternate repetition after taking out, obtain bacterial cellulose/graphene composite material.Graphene in gained matrix material and the mass ratio of bacteria cellulose are about 7:100.
Embodiment 6
By synthesis example 4, prepare bacteria cellulose/oxidized graphite composite material, regulate the amount of each raw material to make the content of graphite oxide in this matrix material be about 20%.The phenylenediamine aqueous solution of preparation 10mol/L.Bacteria cellulose/oxidized graphite composite material is submerged in the dihydroxy-benzene aqueous solution.Under 100 degree, react 72 hours.Extremely neutral with deionized water and the washing of ether alternate repetition after taking out, obtain bacterial cellulose/graphene composite material.Graphene in gained matrix material and the mass ratio of bacteria cellulose are about 15:100.
Embodiment 7
By synthesis example 4, prepare bacteria cellulose/oxidized graphite composite material, regulate the amount of each raw material to make the content of graphite oxide in this matrix material be about 40%.The NaOH aqueous solution of preparation 10mol/L.Bacteria cellulose/oxidized graphite composite material is submerged in the NaOH aqueous solution.At 100 degree, react 72 hours under with the condition stirring, during not every 12 hours supersound process 10 minutes.Extremely neutral with deionized water repetitive scrubbing after taking out, obtain bacterial cellulose/graphene composite material.Graphene in gained matrix material and the mass ratio of bacteria cellulose are about 40:100.
Test case 1
Get the film of a slice bacteria cellulose or bacterial cellulose/graphene composite material, the high small pieces that are about 100mm * 20mm * 5mm of intercepting length and width.Use film drawer to test the mechanical property of sample prepared in embodiment 1 ~ 7 and synthesis example 2.The results are shown in table 1.
Test case 2
Get the film of a slice bacteria cellulose or bacterial cellulose/graphene composite material, intercepting diameter is about the small pieces of 40mm.Use resistivity tester to test the conductivity of sample prepared in embodiment 1 ~ 7 and synthesis example 2.The results are shown in table 2.
Table 1
| Numbering | Elongation at break (%) | Breaking tenacity (MPa) | Tensile modulus (GPa) |
| Embodiment 1 | 10.81 | 79.44 | 0.9645 |
| Embodiment 2 | 11.13 | 87.92 | 1.1206 |
| Embodiment 3 | 13.74 | 154.37 | 1.9374 |
| Embodiment 4 | 18.96 | 346.07 | 3.6617 |
| Embodiment 5 | 25.10 | 519.35 | 5.7160 |
| Embodiment 6 | 29.47 | 627.09 | 7.0265 |
| Embodiment 7 | 30.58 | 672.84 | 7.5186 |
| Synthesis example 2 | 10.23 | 58.79 | 0.8327 |
From the result of table 1, can find out, with respect to pure bacteria cellulose material, bacterial cellulose/graphene composite material of the present invention has better mechanical property.
Table 2
| Numbering | Resistivity (Ω ·cm） |
| Embodiment 1 | 4.9×10 4 |
| Embodiment 2 | 8.3×10 3 |
| Embodiment 3 | 2.4×10 3 |
| Embodiment 4 | 6.2×10 1 |
| Embodiment 5 | 2.1×10 0 |
| Embodiment 6 | 4.9×10 -1 |
| Embodiment 7 | 8.3×10 -2 |
| Synthesis example 2 | 3.9×10 5 |
From the result of table 2, can find out, with respect to pure bacteria cellulose material, bacterial cellulose/graphene composite material of the present invention has better conductivity.
Claims (5)
1. a preparation method for bacterial cellulose/graphene composite material, is characterized in that preparing bacterial cellulose/graphene composite material by reducing bacteria Mierocrystalline cellulose/oxidized graphite composite material being reduced process.
2. the preparation method of a kind of bacterial cellulose/graphene composite material according to claim 1, it is characterized by the mass ratio of Graphene and bacteria cellulose in this matrix material is 0.0001 ~ 50:100.
3. the preparation method of a kind of bacterial cellulose/graphene composite material according to claim 1, it is characterized by the mass ratio of Graphene and bacteria cellulose in this matrix material is 0.01 ~ 10:100.
4. the preparation method of matrix material according to claim 1, is characterized by described preparation method and implements as follows:
(1) graphite oxide is scattered in solvent, with crossing stirring or supersound process, is prepared into graphite oxide dispersion liquid;
(2) in graphite oxide dispersion liquid, prepare bacteria cellulose product, obtain bacteria cellulose/oxidized graphite composite material.
5. the preparation method of matrix material according to claim 1, its feature bacteria cellulose product is prepared by stationary method or dynamic method.
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2012
- 2012-11-19 CN CN201210467684.7A patent/CN103665437A/en active Pending
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