Makatuʻunga ʻi he vai Graphene Exfoliation

ʻOku fakaʻata ʻe ultrasonic exfoliation ke maʻu ha kiʻi graphene siʻisiʻi kae ʻikai fakaʻaongaʻi fefeka solvents fakaʻaongaʻi pe ʻa e vai maʻa. Sonication delaminates graphene ngaahi laʻipepa ʻi ha kiʻi faitoʻo nounou. ʻOku hanga ʻe he fakaʻehiʻehi mei he solvents ʻo liliu graphene exfoliation ʻi ha founga lanu mata mo tuʻuloa.

Graphene hono ngaohi ʻo fakafou ʻi he konga huhuʻa Exfoliation

Ultrasonic disperser UIP4000hdT for commercial graphene exfoliation in continuous flowʻOku manufactured fakakomesiale ʻa e Graphene ʻo fakafou ʻi he konga huhuʻa exfoliation. ʻOku fie maʻu ʻe he konga exfoliation ʻo e graphene ʻa hono fakaʻaongaʻi ʻo e kona, environmentally fakatuʻutamaki, mo e solvents mamafa, ʻa ia ʻoku fakaʻaongaʻi ko e kemikale kimuʻa pe ʻi hono fakatahaʻi ki he/mo ha founga fakamaʻu fakamisini. Kuo fokotuʻu ʻa e ultrasonication ki he ngaahi laʻipepa fakamisini ʻo e graphene, ko ha founga falalaʻanga, lelei mo malu ke maʻu ai ha ngaahi laʻipepa graphene lelei ʻi he tuʻunga fakamisini kakato. Koeʻuhi ʻoku o fakataha maʻu pe hono fakaʻaongaʻi ʻo e solvents fefeka mo e fakamole, fakaʻuliʻi, toʻo faingataʻa mo e fakaʻauha, ngaahi hohaʻa ki he malu pea pehe ki he kavenga ʻa e ʻatakai, ʻoku mahuʻinga ʻaupito ha fili ʻoku ʻikai kona mo malu ange. Graphene exfoliation fakaʻaongaʻi ʻa e vai ko ha solvent mo ha malohi fakaʻata ki he delamination fakamisini ʻo ha ngaahi laʻipepa graphene siʻisiʻi ko ia ko ha founga palomesi lahi ia ki ha ngaohiʻanga graphene lanu mata.
Solvents angamaheni, ʻa ia ʻoku faʻa fakaʻaongaʻi ko ha konga huhuʻa ke fakamovetevetea graphene nanosheets, fakakau ai ʻa e Dimethyl sulfoxide (UEMSO), N, N-dimethylformamide (UEMF), N-methyl-2-pyrrolidone (NMP), Tetramethylurea (TMU), Tetrahydrofuran (THF), propylene carbonateacetone (PC), ethanol, mo e formamide.
ʻI heʻene hoko ko ha founga kuo ʻosi fokotuʻu taimi loloa ki graphene exfoliation ʻi he meʻafua fakakomesiale, ultrasonication lava ai ke maʻu ha graphene lelei ʻo e maʻa maʻolunga ʻi he totongi maʻulalo. ʻI ultrasonic graphene exfoliation ʻe lava ke hoko ʻa e telinga kakato kaka ki ha faʻahinga tohi pe, ʻe faingofua pe hono fakahoko ʻo e faiva graphene tama ki ha ngaahi graphene lahi.

Kole 'a e fakamatala




Fakatokanga'i ange 'etau Tu'utu'uni totonu fakatautaha.


Ultrasonic disperser UIP2000hdT, a 2000 watts powerful sonic system, for graphene exfoliation and dispersion.

He UIP2000hdT ko ha ultrasonic malohi ia ʻi he disperser ki graphene exfoliation mo e fakamovetevetea.

Ultrasonic Exfoliation ʻo Graphene ʻi he vai

Naʻe fakatotoloʻi ʻe Tyurnina et Al. (2020) ʻa e ngaahi nunuʻa ʻo e amplitude mo sonication malohi ʻi he ngaahi founga fakaleleiʻi ʻo e vai maʻa graphite pea mo hono ola graphene exfoliation. ʻI he ako, naʻa nau fakaʻaongaʻi ha Hielscher UP200S (200W, 24kHz). Naʻe fakaʻaongaʻi ʻa e ultrasonic exfoliation ʻo fakaʻaongaʻi ʻa e vai ko ha sitepu pe ʻe taha ki he graphene delamination. Naʻe feʻunga pe hono faitoʻo nounou ʻo e 2h ke maʻu ai ha graphene siʻisiʻi ʻi ha fokotuʻutuʻu beaker sonication.

Ultrasonic graphene exfoliation in water

Ko ha fakahokohoko vave (mei he a ki he f) ʻo e ʻEsia ʻoku ne fakatataaʻi ʻa e sono-exfoliation fakamisini ʻo ha graphite ʻi he vai ʻo fakaʻaongaʻi ʻa e UP200s, ko ha kHz ultrasonicator mo e 3-MM sonotrode. ʻOku fakahaaʻi ʻe he ngaahi ngahau ʻa e feituʻu ʻoku vaeua (exfoliation) mo cavitation e bubbles.
© Tyurnina et Al. 2020 (CC fai ʻe NC-4.0)

Optimization ʻo ultrasonic Graphene Exfoliation

Ultrasonic processor UP200St mo sonotrode mo e kaunga e sio'ata 'o e kelekele.ʻE lava ke faingofua pe hono fokotuʻutuʻu ultrasonic ʻoku fakaʻaongaʻi ʻe Tyurnina et Al. (2020) optimized ki ha tuʻunga lavameʻa mo vave ange exfoliation ʻaki hano fakaʻaongaʻi ha ultrasonic Seinopolo ʻi he founga ʻoku hu mai ai. ʻOku fakaʻata ʻe ultrasonic hono faitoʻo ʻo e laine ki ha teunga ultrasonic lahi ange ʻo e ngaahi meʻa graphite kotoa pe: ko hono fafanga fakahangatonu ʻo e graphite/vai ki he feituʻu ʻoku fakangatangata ai ʻa ultrasonic cavitation, ʻoku hoko kotoa ʻa e graphite uniformly sonicated tupu mei ha tuʻunga maʻolunga ʻo e graphene.
ʻOku fakaʻata ʻe Hielscher ultrasonics systems ke mapuleʻi totonu ʻa e ngaahi fakangatangata mahuʻinga kotoa pe hange ko e amplitude, taimi/pukepuke, input ʻo e ivi (meʻa ke fai/mL), malohi, mo e mafana ʻo e ʻea. Ko hono fokotuʻu ko ia ʻo e ngaahi fakangatangata ultrasonic ʻoku maʻolunga taha hono fakavaivaiʻi, lelei mo e lavameʻa fakalukufua.

ʻOku ultrasonication fefe ʻa e tuʻuaki Graphene Exfoliation

ʻI he taimi ʻoku fakatahaʻi ai ʻa e ngaahi peau fakaʻata maʻolunga ki ha slurry ʻo graphite efu mo e vai pe ko ha solvent, sonomechanical ngaahi malohi hange ko e tutuʻu maʻolunga, fetoʻaki lahi mo e malohi lahi mo e mafana differentials fakatupu ha ngaahi tuʻunga malohi ʻo e ivi. Ko e ngaahi tuʻunga malohi ko ʻeni ʻo e ivi ko e ola ia ʻo e cavitation. Laukonga lahi ange fekauʻaki mo ultrasonic cavitation heni!
ʻOku kamata ʻe he malohi fakaʻata hono fakalahi ʻo e efu graphite, koeʻuhi he ʻoku fluids ʻi he vahaʻa ʻo e graphene, ʻa ia ʻoku faʻu ʻaki ʻa e graphite. ʻOku delaminate ʻe he ultrasonic e ngaahi malohi ʻo e graphene ʻa e ngaahi laʻipepa ʻe taha ʻo e graphene pea fakamovetevetea kinautolu ko graphene tama ʻi he founga fakalelei. Ke maʻu ha graphene taimi loloa ʻi he vai, ʻoku fie maʻu ha surfactant.

ultrasonicator UP200St (200W) dispersing graphene laʻipepa

Kole 'a e fakamatala




Fakatokanga'i ange 'etau Tu'utu'uni totonu fakatautaha.


Ultrasonicators ngaue maʻolunga ki Graphene Exfoliation

ʻOku fakataumuʻa ʻa e ngaahi fotunga poto ʻo Hielscher ultrasonicators ke fakapapauʻi ʻoku fai ha tafa falalaʻanga, reproducible ngaahi ola mo e anga fakakaumeʻa. ʻE lava ke faingofua hono maʻu mo dialled ʻa e ngaahi fokotuʻutuʻu ngaue ʻo fakafou ʻi he menu, ʻa ia ʻe lava ke maʻu ʻo fakafou ʻi he digital colour Touch-Display mo e browser ʻoku ʻikai lava ʻo mapuleʻi. Ko ia ai, ko e ngaahi tuʻunga kotoa ʻo e ngaue hange ko e kupenga, ivi fakakatoa, amplitude, taimi, malohi mo e mafana ʻoku hiki ia ʻi ha kaati SD. ʻOku fakaʻata koe heni ke ke toe fakaleleiʻi mo fakafehoanaki ʻa e sonication ki muʻa pea ke lahi ange ʻa e founga graphene exfoliation ki he lavameʻa maʻolunga taha.
Hielscher's industrial processors of the hdT series can be comfortable and user-friendly operated via browser remote control.ʻOku fakaʻaongaʻi ʻa e Hielscher Ultrasonics systems ʻi he funga ʻo e mamani ki hono ngaohi ʻo e ngaahi laʻipepa graphene lelei mo graphene oxides. Hielscher faingofua pe hono fakalele ʻo e ultrasonicators lalahi amplitudes ʻi he tafa hokohoko (24/7/365). Amplitudes ʻo aʻu ki he 200μm ʻe faingofua pe hono maʻu e ngaahi tuʻunga angamaheni sonotrodes (ultrasonic probes/Meʻaifi Hoane mo cascatrodesTM). ʻOku lava ke maʻu ha amplitudes maʻolunga ange fakapatonu ultrasonic sonotrodes. Koeʻuhi ko ʻenau robustness mo hono tokangaʻi maʻulalo, ʻoku angamaheni ʻaki hono fakahu ʻetau ngaahi founga exfoliation ultrasonic ki hono fakaʻaongaʻi mamafa ʻo e fatongia pea mo e ngaahi ʻatakai ʻoku femoʻuekina.

Hielscher ultrasonic processors ki graphene exfoliation kuo ʻosi fakahu fakaemamani lahi ia ʻi he meʻafua fakakomesiale. Fetuʻutaki mai he taimi ni ke aleaʻi hoʻo founga ngaohi graphene e ngaohiʻanga koloa! ʻE fiefia ʻetau kau ngaue taukei lelei ke vahevahe ha fakamatala lahi ange ʻi he founga exfoliation, ultrasonic systems mo e totongi!

'Oku 'omi 'e he e tepile 'i lalo ha faka'ilonga ia 'o e tu'unga 'o e ngaue ki he fakafuofua'i 'o e hotau ultrasonicators:

Kulupu (batch) 'o e tohi 'Oku tafe mai 'a e 'ea 'Oku fokotu'u atu 'a e ngaahi me'angaue
mL 'o e 1 ki he 500 10 ki he 200mL/miniti 'e UP100H
mL 'i he 10 ki he 2000 20 ki he 400mL/miniti 'e UP200Ht, UP400St
0.1 ki he 20L 0.2 ke 4L/miniti 'e UIP2000hdT
10 ki he 100L 2 ki he 10L/miniti 'e UIP4000hdT
n.a. 10 ki he 100L/miniti 'e UIP16000
n.a. lalahi fakataha'i 'o e UIP16000

Fetu'utaki mai kiate kimautolu! / Kole kiate kitautolu!

Kole ki ha fakamatala lahi ange

Kataki 'o ngaue 'aki e foomu 'i lalo ke kole ha toe fakamatala ki he ultrasonic processors, faka'aonga'i mo e totongi. Te mau fiefia ke alea'i e founga 'oku mo 'i ai mo ho'omou ngaahi fie ma'u ultrasonic he polokalama!









Kataki 'o fakatokanga'i ange 'etau Tu'utu'uni totonu fakatautaha.


Ultrasonic high-shear homogenizers are used in lab, bench-top, pilot and industrial processing.

Hielscher Ultrasonics ʻa e ngaohiʻanga koloa maʻolunga ultrasonic homogenizers ki hono tuifio ʻo e ngaahi polokalama, fakamovetevetea, emulsification mo e toʻo hingoa ʻi he fale fakatotolo fakakemi, pailate mo e meʻafua ki he ngaahi meʻa fakapisinisi.

Ngaahi tohi/fakamo'oni fakafolofola

  • Anastasia V. Tyurnina, Iakovos Tzanakis, Justin Morton, Jiawei mi, Kyriakos Porfyrakis, Barbara M. Maciejewska, Nicole Grobert, Dmitry G. Eskin (2020): Ultrasonic exfoliation ʻo graphene ʻi he vai: ko ha ako mahuʻinga Parameter. Kāponi Vol. 168, 2020. 737-747.
    (Maʻu ʻi ha mohu founga Commons ongoongo 4.0: CC fai ʻe NC-4.0. Vakai ki he ngaahi lea kakato heni.)
  • Štengl V., J. Henych, M. Slušná, P. Ecorchard (2014): Ha exfoliation 'o e analogues inorganic 'o e graphene. Na'e tohi 'e Nanoscale 'o e fakatotolo 'a e 9(1), 2014.
  • Unalan I.U., C. momoAº, Trabattoni S., Piergiovannia L., Farris S. (2015): Tokoni ki he Polysaccharide vave exfoliation 'o e graphite platelets ki ngaahi la'ipepa vai dispersible graphene 'o e tu'unga ma'olunga. RSC fakalakalaka 5, 2015 26482 – 26490.
  • Bang, J. H.; Suslick, S. K. (2010): Ko hono faka'aonga'i 'o ha ki he Synthesis 'o e ngaahi naunau 'o e Nanostructured. Ngaahi naunau kafakafa 22/2010. p. 1039-1059.
  • Stengl, V.; Popelková, D.; Vlácil, P. (2011): TiO2-Graphene Nanocomposite ko e Photocatalysts 'a e ma'olunga 'o e ngaue. 'I: Ko e tohinoa fakatu'asino fakakemi F 115/2011. p. 25209-25218.



Ngaahi mo'oni'i me'a 'oku mahu'inga ke 'ilo'i

graphene

La'i pepa 'a e Graphene Graphene ko ha monolayer 'o e sp2-fehokotaki 'a e kaponi atoms. 'Oku 'omi 'e he Graphene 'a e ngaahi 'ulungaanga fakamatelie makehe hange ko ha makehe lalahi pau fukahi faka'elia (2620 m2l-1), ma'olunga ange 'o e ngaahi koloa fakamisini mo 'a ha talavou modulus 1 'a e TPa mo e ha malohi fau 'o e 130 GPa, ha matu'aki ma'olunga conductivity faka'ilekitulonika (loki-mafana electron fefononga'aki 'o 2.5 × 105 senitimita 'e2 V-1s-1), ma'olunga 'aupito 'a e 'ea conductivity ('i 'olunga 3000 W m K-1), ke nau talamai 'a e ngaahi koloa mahu'inga taha. Koe'uhi ko e ma'olunga ange 'o e koloa fakamamani, graphene 'oku lahi hono faka'aonga'i ki hono fakatupulaki mo hono ngaohi 'o e puha 'uhila 'a e ma'olunga 'o e ngaue, ngaahi selo 'o e lolo, ngaahi selo ai, supercapacitor, storages peroxide, ngaahi paa electromagnetic mo naunau faka'ilekitulonika. 'Ikai ngata ai, 'oku fakakau ai 'a e graphene ki he tokolahi 'o e nanocomposites mo e fakataha'i 'o e ngaahi naunau ko e fakamamafa'i fakalakalaka'i, e.g. 'i he polymers, nau mo ha matrices ukamea. Koe'uhi ko hono conductivity ma'olunga, ko ha konga mahu'inga 'o e conductive 'a e vali mo e inks e graphene.
E Lepiti mo e malu teuteu ultrasonic 'o e graphene 'o e tau'ataina 'i he palopalema 'Oku faka'ata 'a e fakakatoa 'o e ngaahi tohi 'i he si'isi'i 'o e fakamole 'a e fakalahi 'a e ngaahi polokalama 'o e graphene ki he ngaahi ngaue'anga lahi ange mo lahi ange.
Ko ha taha-atom-matolu pe e ki'i kaponi, 'a ia 'e lava ke ke fakamatala'i ia ko ha fa'unga tautaha-fakatoka pe 2 'o e graphene 'a e Graphene (tautaha pe graphene = SLG). Graphene kuo Faka'elia fukahi pau ha 'ape lalahi mo e ngaahi koloa fakamisini ma'olunga ('a e kau modulus 'o e 1 TPa mo malohi fau 'o e 130 GPa), 'oku 'omi 'e he fu'u faka'ilekitulonika mo e 'ea conductivity, tokanga'i makehe fefononga'aki, misini faka'ata lahi, pea ko e impermeable ki he kasa. Koe'uhi ko e ngaahi 'ulungaanga fakamatelie ko 'eni, 'oku faka'aonga'i ai 'a e graphene ko e fakamamafa'i fakalakalaka'i ke foaki 'a e composites hono ivi, conductivity, etc. Kae lava ke fakataha'i 'a e ngaahi 'ulungaanga 'o e graphene mo e ngaahi naunau kehe, kuo pau ke ke fakamovetevete ki e komipauni 'o to'o ai 'a e graphene pe 'oku faka'aonga'i ia ko ha coating si'isi'i filimi ki ha substrate.


Hielscher Ultrasonics supplies high-performance ultrasonic homogenizers from lab to industrial size.

Ngaue ultrasonics maʻolunga! ʻOku ʻufiʻufi ʻe he koloa ʻa Hielscher ʻa e tuʻunga kakato mei he fale fakatotolo fakakemi ultrasonicator ʻi he ngaahi ʻiuniti ʻi ʻolunga ki he ngaahi polokalama ultrasonic lalahi.