Iko kushandiswa kweGraphite Powder

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Graphite Powder

Graphite poda chinhu chakasiyana-siyana chinogona kushandiswa kune zvakawanda zvinangwa. Semuenzaniso, inogona kushandiswa semafuta uye magnetorheological elastomer.

Graphene nanoflakes

Graphene nanoflakes idiki, senge zvidimbu zve graphite poda. Kureba kwavo kwema nanometers mashanu (nm), kubva pa100 kusvika ku200 nm. Zvinogona kugadzirwa neakasiyana-siyana zvinonyungudutsa, zvinosanganisira ionic zvinwiwa, ma surfactants, uye hummers. Anoshandiswa kugadzira transparent conductive electrodes. Iwo anoshandiswawo mukugadzira magineti elastomers, mabhatiri, brake linings, uye crucibles. Ivo vane yakanakisa thermal conductivity. Izvi zvivakwa zvinoita kuti graphene inakidze zvakanyanya kune maapplication mune yepamusoro-inoshanda nanoelectronics uye masensa.

Iyo synthesis yegraphene inosanganisira nzira mbiri. Imwe nzira ndeye epitaxial kukura, iyo inogadzira yakakwirira-crystalline graphene firimu. Imwe nzira ndeyemakemikari vapor deposition. Aya maitiro ane zvakanakira nekuipira zvakasiyana.

Epitaxial kukura inzira inodhura. Chibereko chayo chinosiyana nehupamhi hwe substrate uye hutano hwevanotangira. Zvisinei, maitiro acho ari scalable. Ongororo ichangoburwa yakaratidza kuchinjisa kudhindwa kwemacroscopic graphene mapatani kubva kune yakarongedzwa HOPG.

Iyo electrochemical nzira yekugadzira graphene iri nyore uye ine hushamwari. Izvo hazvidi zvine ngozi oxidizing zvinhu uye zvinogona kukwidziridzwa zviri nyore. Inogadzirawo graphene yemhando yepamusoro. Mabhenefiti matatu makuru eiyi nzira akanyorwa muTafura 1.

Iyo nzira ye exfoliation yakavakirwa pane isina simba Van der Waals kukwezva. Kuti uparadze kukwezva, simba rekunze re300 nN/mm2 rinodiwa. Izvo zvakakoshawo kuchengetedza magirafu akatsiga mukati mepakati. Chinhu chakanaka chinonyungudutsa chakakosha. Izvi zvinonyungudutsa zvinofanirwa kuderedza kushushikana kwechiso uye kuwedzera graphene concentration. Mukuwedzera, ionic zvinwiwa zvinogona kushandiswa seyakagadzika solvent yegraphene. Vanogona kushandiswa kune green chemistry.

Izvo zvemagetsi zvimiro zvegraphene hazvina kuongororwa zvizere. Chikonzero cheizvi ndiko kuoma kwekutamisa. Iwo emagetsi zvimiro zvegraphene zvakare akaganhurirwa nehukuru sisitimu saizi. Vamwe vaongorori vakaita ongororo vachishandisa molecular dynamics kuferefeta mabviro emicroscopic ekukweshana. Migumisiro inovimbisa.

Pamusoro pemaitiro ataurwa pamusoro apa ekugadzira, kune dzimwe nzira dzekugadzira graphene. Graphene flakes inogona kugadzirwa ne mechanical exfoliation. Ndiyo nzira yakachipa yekugadzira yemhando yepamusoro graphene. Iyo nzira inoitwa neinotonhora madziro system, isingambopise madziro. Izvi zvinogadzira graphene isina kukanganisa.

Magnetorheological elastomers

Graphite chimwe chezvinhu zvikuru zvinoumba magnetorheological elastomers (MREs). Zvidzidzo zvakasiyana-siyana zvakaitwa kuti zvivandudze mashandiro emagetsi nemagetsi eMREs. Graphite inozivikanwa kukwidziridza conductivity yemagetsi, kuwedzera ekutanga michina zvivakwa, uye inopa chimiro chiri nani kune MREs.

MREs anonyanya kugadzirwa kubva kune polymer matrix. Mhando dzematrix zvinhu zvinoshandiswa zvinosanganisira silicone, natural rubber, uye synthetic elastomers. Carbonyl iron particles inowanzo shandiswa semagnetic filler particles. Mune zvimwe zviitiko, zvimedu izvi zvinosanganiswa negraphite kana graphene particles. Izvi zvinowedzera zvinogona zvakare kugadzirisa rheological kuita kweMR zvinhu.

Vamwe vatsvakurudzi vakagadzira jira pamusoro pemagineti particles kuti vavandudze kuwirirana pakati pezvikamu uye matrix medium. Izvi zvinogona kuwedzera sedimentation kugadzikana kwezvinhu. Iyo huru deformations yeMREs ine graphite microparticles inotarirwa nekusimba kweiyo magnetic field. Zvakakosha kuziva kuti hukuru hwemagineti huchashandura rheological uye magetsi conductivity yeMRE.

Zvimwe zvezvinowedzera zvinogona kuwedzera plastiki yematrix. Pamusoro peizvozvo, izvi zvinowedzera zvinogona kuverengera kugoverwa kwekushushikana kwemukati mune izvo zvinyorwa. Kushandisa silicone mafuta mune SR matrix kunogona kubatsira kugadzira yakawedzera homogeneous kugovera kweCIPs. Izvi zvinogona kuwedzera mukaha pakati pematrix mamorekuru uye kuderedza kusangana kwemamorekuru. Izvi zvinoguma nekubatana kuri nani kweCIPs nerubber matrix.

Kuti ibudise yakawedzera kutaurwa uye ine simba mechanical performance yeMR elastomers, graphite particles akaunzwa mune yakajairika MREs. Mukuwedzera kune izvi, carbon black yakawedzerwa kune elastomers. Chekupedzisira, tembiricha yegraphite/yekamuri yakanyungudutsa silicon rubber (Gr-MRE) yakagadzirwa. Zvinhu zveGR/RTV-MRE zvakaongororwa pasi pemagineti akasiyana densities. Iyo piezoresistive coefficient yakadzidzwa zvakare.

Iyo dynamic shear modulus ye isotropic MR elastomers yakaongororwa. Tsvagiridzo iyi yakaratidza kuti iyo modulus yekuchengetedza inoshanduka mune inodarika makumi mashanu muzana neiyo magineti flux density. Kuenzaniswa neMRE, iyo hukama magnetorheology ye isotropic MR elastomers yakadzikira. Mune zvimwe zviitiko, zero-munda modulus yaive yakakwirira kune yakaoma matrix zvinhu.

Lithium-graphite intercalation compounds

Zvidzidzo zvakasiyana-siyana zvakaitwa kuti zviongorore kupindirana kweiyo alkali simbi ion kuita graphite. Zvisinei, nzira dzokuisa nadzo hadzisati dzanyatsonzwisiswa.

Muenzaniso mutsva we lithium intercalation mugraphite inokurudzirwa mubasa iri. Iyi modhi yakavakirwa paDaumas-Herold intercalation modhi. Mune iyi modhi, Li + ions inoiswa mugraphite kuburikidza nenhevedzano yematanho epakati. Simba rekufambisa rekupinza rinoenderana nekugoverwa kweLi atomu. Mukuwedzera, iyo modhi yakafanotaurwa kune riini kabhoni.

Iyi modhi inoenderana nemhedzisiro yekuyedza. Zvimiro zvemagetsi zvepristine graphite uye AB-akaturikidzana magirafu anoratidzwa. Simba rekugadzira reLi-GIC rinogona kufungidzirwa kubva pane iyi modhi. Chimiro che graphite electrode chakadzidzwawo. Zvakaonekwa kuti LiC6 komboni ine yakapusa hexagonal planar chimiro. Ichi chimiro chakasimbiswa nekutarisa kwe spectroscopic.

Iwo emagetsi zvimiro zveLiC12 komboni inoratidza itsva ab initio inozvimiririra-munda simba-bhendi chimiro. Chimiro chitsva chine chekuita nepolarization yevalence orbitals yemaatomu egraphite. Izvo zvakare zvinobvumirana nekucherechedza kwekuparadzaniswa kwenzvimbo mune imwe girafu electrode yakwegura. Iyo crystal chimiro chiratidziro chepedyo chehexagonal mesh yeC6. Ionic radius yeNa + ions mugirafu yakakura. Iyo ionization simba realkali simbi inodzikira nekuwedzera huwandu hweatomu. Izvi zvinofarira kubatana kwe electrostatic pakati peiyoni yakanaka uye graphene yakachajiwa zvisina kunaka.

Muchidzidzo ichi, mhedzisiro yelithium concentration pane yemahara simba rekupindirana yakaongororwa mune graphite chimiro cheiyo randomly oriented high graphene (ROHG). Mhedzisiro yeLi paOCV yakaenzanisirwa muhafu-sero. Iyo theoretical modhi yaive yakavakirwa paMonte Carlo maitiro. Mupiro we enthalpy kune simba rekusununguka rekupindirana rakaverengwa zvakare. Izvi zvakaitwa muUB3LYP/6-311G(d) nhanho yedzidziso. Iyo interlayer inosunga simba uye kupindirana kwevan der Waals mugirafu retiti zvakare kuri kubvumirana kwakanaka nekuyedza.

Ichi chidzidzo chinoratidza kuti entropy inobatanidzwa nesimba remahara re lithium intercalation muchimiro cheyeridzo kabhoni. Migumisiro yemiti yakasiyana-siyana yelithium pane enthalpy inoonekwawo.

Graphene poda inogona kushandiswa semafuta ekuzora

Graphene poda ndeimwe yemafuta anovimbisa zvakanyanya. Inonakidzwa nekugadzikana kwemakemikari. Graphene inogona kushandiswa semafuta akasimba uye sekuwedzera kwemafuta mumafuta akajairwa. Iyo ine yakasarudzika tribological zvivakwa uye ine inogona kushandiswa mumunda we nano-composite zvinhu. Zvidzidzo zvakawanda zvakaitwa pane anti-kupfeka uye antifriction zvimiro zvegraphene.

Graphene ine superior tribological properties kune graphite oxide. Inogona kushandiswa sechinhu chinowedzera mumafuta ekuzora kuvandudza mafuta uye antiwear kuita. Graphene particles inogona kugadzirwa ne supercritical CO2 kubvisa graphite. Izvo zvakatsiga, crystalline, uye hazvidi kuenderera mberi kuchipisa.

Kemikari shanduko yegraphene inogona zvakare kuvandudza kwayo dispersibility. Iko kushandura kunoderedza kunze-kwe-ndege kushanduka kwemamorekuru. Kuderedzwa kunoguma kwesimba rekunamatira kunoguma nekuderedzwa kweiyo friction coefficient. Izvi zvinowanikwa kuburikidza nekuwedzera kuomarara kwakajairwa uye kuomarara kwekukotama.

Iyo tribological maitiro egraphene pasimbi yakadzidzwa pamicro-scale. Nekudaro, ichangoburwa macro-scale tribological research yakavhura nzira nyowani dzekushandisa graphene. Izvi zviedzo zvakasimbisa kufanotaura kwekare nezve tribological zvimiro zvegraphene.

Pamusoro pekudzikisa kupfeka, graphene inogona kuvandudza mafuta esimbi. Graphene maplatelet anogona kugadziridzwa kemikari kuti aderedze simba rekunamatira pakati pesimbi uye lubricant. Aya mahwendefa anogona kubva aparadzirwa zvakafanana mumafuta epasi. Iyo yekuwedzera yekuwedzera chinhu chakakosha mukudzikisa kukweshera uye kupfeka kwemafuta ekuzora. Zvakaonekwa kuti 0.075 wt.% yekemikari yakagadziridzwa graphene inopa yakagadziridzwa kutakura mutoro. Zvakare, zvakaderedza dhayamita yekupfeka kwemabhora esimbi ne33%.

Muchidzidzo chekushanda kwekuzora kwegraphene mumvura, Xie et al. yakashuma kuti avhareji yekupfeka mavanga dhayamita yakadzikira nekuwedzera kweiyo graphene concentration. Vakataurawo kuti coefficient of friction (COF) mumvura yakaderera pane iyo yakafanana graphite pakupisa kwekamuri. Iko friction coefficient haina kugadzikana kana isingasviki 0.15 wt.% inowedzerwa kune lubricant.

Pasinei nekuderera kwayo, graphite haidziviriri kubva pakuora. Kusiyana negraphene, graphite haiburitse yakanaka yakaonda firimu kufukidzwa.

Pamusoro peRBOSCHCO

RBOSCHCO ikambani inovimbwa nayo pasi rose inotengesa zvinhu zvemakemikari uye mugadziri ane ruzivo rwemakore anopfuura gumi nemaviri mukupa makemikari emhando yepamusoro uye maNanomaterials. Kambani iyi inotumira zvinhu kunyika dzakawanda, dzakadai seUSA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Uganda, Turkey, Mexico, Azerbaijan, Belgium, Cyprus, Czech Republic, Brazil, Chile, Argentina, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, Germany, France, Italy, Portugal nezvimwewo. Semugadziri anotungamira mukugadzira nanotechnology, RBOSCHCO ndiyo inonyanya kukosha pamusika. Chikwata chedu chebasa chinopa mhinduro dzakakwana dzekubatsira kuvandudza mashandiro emaindasitiri akasiyana-siyana, kugadzira kukosha, uye kugadzirisa matambudziko akasiyana-siyana zviri nyore. Kana uchitsvaga graphite powder, ndapota taura nesu kana kutumira email ku: [email protected]

(Mashandisirwo eGraphite Powder)