Hielscher faka'ata tekinolosia

Uniformly fekau'i CNTs 'e Ultrasonication

Ke lava 'o hu ki he ngaahi nanotubes makehe (CNTs), kuo pau ke fakamovetevete kinautolu 'e he homogeneously.
Ko ultrasonic dispersers 'a e me'angaue angamaheni taha ke tufa 'a e CNTs ki aqueous mo e suspensions Solvent.
'Oku fakatupu 'e he ultrasonic dispersing tekinolosia ha ivi ma'olunga fe'unga ke ma'u ha mavahevahe kakato 'o CNTs ta'e maumau'i kinautolu.

Dispersing ultrasonic 'o e kaponi Nanotubes

Sonication malohi mo ha fekumi, ultrasonicator. (Lomi'i ke fakalahi!)Carbon nanotubes (CNTs) have a very high aspect ratio and exhibit a low density as well as an enormous surface area (several hundred m2/g), which gives them unique properties such as very high tensile strength, stiffness, and toughness and a very high electrical and thermal conductivity. Due to Van der Waals forces, which attract the single carbon nanotubes (CNTs) to each other, CNTs arrange normally in bundles or skeins. These intermolecular forces of attraction are based on a π-bond stacking phenomenon between adjacent nanotubes known as π-stacking. To derive the full benefit from carbon nanotubes, these agglomerates must be disentangled and and the CNTs must be distributed evenly in a homogeneous dispersion. Intense ultrasonication creates acoustic cavitation in liquids. The thereby generated local shear stress breaks CNT aggregates and disperses them uniformly in a homogeneous suspension. The ultrasonic dispersing technology creates sufficiently high shear energy to achieve a complete separation of CNTs without damaging them. Even for the sensitive SWNTs sonication is successfully applied to disentangle them individually. Ultrasonication just delivers a sufficient stress level to separate the SWNT aggregates without causing much fracture to individual nanotubes (Huang, Terentjev 2012).

Ngaahi lelei 'o e ultrasonic CNT fakamovetevetea

  • Toko taha 'oku fakamovetevete CNTs
  • Homogeneous tufaki'anga naunau
  • Kuo movetevete ma'olunga 'a e tu'unga fe'unga
  • 'Olunga CNT loadings
  • 'Ikai ha CNT ma'ulalo
  • mo e vave 'o e ngaue ki
  • mapule'i 'o e tonu 'a e founga
UIP2000hdT e K-2Ultrasonicator ki he kaponi nanotubes dispersions.

UIP2000hdT – 2Kultrasonicator. CNT dispersions

Kole 'a e fakamatala




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


Founga ngaue ultrasonic ma'olunga ki CNT Dispersions

Hielscher e ngaahi naunau Ultrasonics malohi mo falala'anga ultrasonic e me'angaue ki he movetevete lelei 'o CNTs. Pe 'oku fie ma'u ke ke teuteu ha fanga ki'i sipinga CNT ki he fakaikiiki mo e R&T pe ko ha'amou fokotu'u ha ngaahi me'a lalahi 'oku lahi hono dispersions, ka 'oku 'omi 'e he koloa 'o e Hielscher ha ngaahi founga lelei ultrasonic ki ho'omou fie ma'u. Mei he 50W ultrasonicators ki he loki teuteu fale 'o a'u ki 16Khai ultrasonic ngaahi 'iuniti lalahi/ ki he ngaahi ngaohi fakakomesiale, Hielscher Ultrasonics kuo ke kofukofu'i.
To produce high-quality carbon nanotube dispersions, the process parameters must be well controlled. Amplitude, temperature, pressure and retention time are the most critical parameters for a even CNT distribution. Hielscher’s ultrasonicators not only allow for the precise control of each parameter, all process parameters are automatically recorded on the integrated SD card of Hielscher’s digital ultrasonic systems. The protocol of each sonication process helps to ensure reproducible results and consistent quality. Via remote browser control the user can operate and monitor the ultrasonic device without being on the location of the ultrasonic system.
Tupu mei he nanotubes 'a e kaponi (SWNTs) mo e kaponi fakavaha'a-ta'u nanotubes (Mwaleti) 'o hange ko ia 'oku fie ma'u ke fai 'e he aqueous pe ko e fetu'utaki mo e ngaahi me'angaue pau intensities, ko e ultrasonic amplitude ko ha tefito'i me'a mahu'inga ia 'i he taimi 'oku hoko mai ai ki he koloa faka'osi. Hielscher Ultrasonics’ ultrasonic me'a processors lava 'o fakatau'ataina'i lahi mo angavaivai 'aupito. Fokotu'u 'a e amplitude lelei ki ho'o ngaahi fie ma'u ki he ngaue. Na'a mo amplitudes 'e lava ke faingofua 'a e lele 'o a'u ki he 200 μm 'i he ngaue pe 'i 24/7. Ki he amplitudes ma'olunga ange, 'oku 'ata leva fakapatonu ultrasonic sonotrodes. 'Oku faka'ata 'e he robustness 'o Hielscher e me'angaue ultrasonic 'a e 24/7 ke ngaue mamafa 'i he fatongia mo e ngaahi 'atakai 'oku femo'uekina.
'Oku fiemalie 'etau kau kasitoma 'i he robustness mo e ala falala'anga 'o e polokalama 'a Hielscher ultrasonic. 'Oku fakapapau'i 'e he founga hono fola 'i ha ngaahi feitu'u 'oku lahi ai e ngaue ki he fatongia, 'i he ngaahi 'atakai mo e ngaue 'e 24/7 'oku lelei mo ma'ama'a. Ultrasonic 'a e founga ngaue intensification fakasi'isi'i 'a e taimi ngaue pea fakahoko ha ngaahi ola lelei ange, hange ko e lelei ange, ha koloa 'oku ma'olunga ange hono foaki mai.
'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
0.5 ke 1.5mL n.a. VialTweeter
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 faka'aonga'i e foomu 'i lalo, kapau 'oku ke loto ke kole ha fakamatala lahi ange fekau'aki mo e ultrasonic homogenization. Te tau fiefia ke 'oatu ha polokalama ultrasonic fakataha ho'o ngaahi fie ma'u.









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


Hielscher Ultrasonics manufactures ultrasonicators ma'olunga ki he ngaahi polokalama 'o e sonochemical.

High-Power ultrasonic processors mei he fale fakatotolo fakakemi ki ha me'afua pailate mo e fa'u.

Ngaahi fakamo'oni fakafolofola/ngaahi tohi

  • Biver T.; Criscitiello F.; Di Francesco F.; Minichino M.; Swager T.; Pucci A. (2015): MWCNT/Perylene bisimide Water Dispersions for Miniaturized Temperature Sensors. RSC Advances 5: 2015. 65023–65029.
  • Chiou K.; Byun S.; Kim J.; Huang J. (2018): Additive-free carbon nanotube dispersions, pastes, gels, and doughs in cresols. PNAS Vol. 115, No. 22, 2018. 5703–5708.
  • Huang, Y.Y:; Terentjev E.M. (2012): Dispersion of Carbon Nanotubes: Mixing, Sonication, Stabilization, and Composite Properties. Polymers 2012, 4, 275-295.
  • Krause B.; Mende M.; Petzold G.; Pötschke P. (2010): Characterization on carbon nanotubes’ dispersability using centrifugal sedimentation analysis in aqueous surfactant dispersions. Conference paper ANTEC 2010, Orlando, USA, May 16-20 2010.
  • Paredes J.I.; Burghard M. (2004): Dispersions of Individual Single-Walled Carbon Nanotubes of High Length. Langmuir 2004, 20, 5149-5152.
  • Santos A.; Amorim L.; Nunes J.P.; Rocha L.A.; Ferreira Silva A.; Viana J.C. (2019): A Comparative Study between Knocked-Down Aligned Carbon Nanotubes and Buckypaper-Based Strain Sensors. Materials 2019, 12, 2013.
  • Szelag M. (2017): Mechano-Physical Properties and Microstructure of Carbon Nanotube Reinforced Cement Paste after Thermal Load. Nanomaterials 7(9), 2017. 267.



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

nanotubes kaponi

Ko e kaponi nanotubes (CNTs) ko ha konga ia 'o ha kalasi makehe 'o ha ngaahi naunau kaponi 'oku fakapalataha, 'oku ha ai ha ngaahi me'angaue fakamisini, faka'uhila, mo e ngaahi koloa mahu'inga makehe. Ko ha konga lahi ia 'oku faka'aonga'i 'i hono fakatupulaki mo hono fa'u 'o ha nanomaterials, hange ko e nano-composites, 'o fakamalohia e ngaahi ala me'a ko ia. pea 'oku ngaue 'aki ia 'i he ngaahi tekinolosia faka'aati. 'Oku hanga 'e CNTs 'o fakahaa'i ha ivi tensile ma'olunga, pea mo ha ngaahi me'a 'oku ne 'ave mo ma'olunga hono fe'ave'aki e koloa, 'a e fanga ki'i mo e kemikale fakaesino, 'a ia 'oku ne 'ai nanotubes ha tala'ofa additive ki he ngaahi naunau manifold.
'Oku fakafaikehekehe'i 'a e CNTS ki he kaponi kuo 'aa'i nanotubes (SWNTs), 'o makatu'unga pe 'i honau fale, 'a ia ko e kaponi kuo 'aa'i (DWCNTs), mo e kaponi fakavaha'a-ta'u ki he ngaahi nanotubes (), pea mo e Ngaleti kuo 'aa'i (Mwn).
Ko e SWNTs 'oku pukupuku, pea fu'u lahi e ngaahi tiupi kuo ngaohi mei he holisi kaponi matolu 'e taha. 'Oku fokotu'utu'u 'a e la'i pepa 'atomi 'o e carbons 'i ha nge'esi honi lattice. 'Oku nau fa'a conceptually 'i hono fakafehoanaki atu ki he ngaahi la'ipepa ne fokotu'utu'u fakataimi 'o e graphite pe graphene.
'Oku kau ki ai ha nanotubes 'e ua kuo 'aa'i pea 'oku 'i ai e DWCNTs 'e taha 'oku 'i he malumalu 'o e ongo matu'a.
Ko ha foomu CNT 'a e Mwuang, 'a ia 'oku kehekehe ai 'a e kaponi 'a e nanotubes. Hili 'enau inisi honau matolu 'i he vaha'a 'o e 3 – 30 NM pea 'e lava ke nau tupulaki fuoloa, 'e lava ke kehekehe 'enau ngaahi konga 'i he vaha'a 'o e 10 mo e 10 million. Fakafehoanaki ki he kaponi nanofibers, 'oku 'i ai ha fale holisi kehe 'o e Mw, ko ha feitu'u ia 'oku si'isi'i ange hono langa, ko ha ki'i inisi honau matolu ki tu'a, mo ha loto pukupuku. Angamaheni 'aki hono ngaue 'aki industrially 'oku hange ko e (Mavailable) ko e e.g. Baytubes® C150P, Nanocyl® NC7000, Arkekama Graphistrength® C100, mo FutureCarbon CNT-MW.
Synthesis 'o CNTs: 'E lava pe ke fa'u CNTs 'e he plasma 'o makatu'unga 'i ha founga pe Arc) ko hono fakahoko 'o e founga, founga ablation synthesis, founga 'oku ne ngaohi 'aki e kemikale, 'a e ngaahi ngaohi'anga 'o e (FVAD) pe synthesis 'a e kemikale ko e mao Deposition.
Functionalization 'o CNTs: Ke fakalelei'i 'a e ngaahi 'ulungaanga 'o e kaponi nanotubes pea 'ai ke nau taau ange ai mo ha tohi kole pau, CNTs fa'a functionalized, e.g. 'aki hano tanaki atu 'a e ngaahi falani carboxylic (-'o e ku 'i ai) pe hydroxyl (-'OOI).

CNT Dispersing Additives

A few solvents such as super acids, ionic liquids, and N-cyclohexyl-2-pyrrolidnone are capable to prepare relatively high-concentration dispersions of CNTs, whilst the most common solvents for nanotubes, such as N-methyl-2-pyrrolidone (NMP), dimethylformamide (DMF), and 1,2-dichrolobenzene, can disperse nanotubes only at very low concentrations (e.g., typically <0.02 wt% of single-walled CNTs). The most common dispersion agents are polyvinylpyrrolidone (PVP), Sodium Dodecyl Benzene Sulfonate (SDBS), Triton 100, or Sodium Dodecyl Sulfonate (SDS).
Cresols are a group of industrial chemicals which can process CNTs at concentrations up to tens of weight percent, resulting in a continuous transition from dilute dispersions, thick pastes, and free-standing gels to an unprecedented playdough-like state, as the CNT loading increases. These states exhibit polymer-like rheological and viscoelastic properties, which are not attainable with other common solvents, suggesting that the nanotubes are indeed disaggregated and finely dispersed in cresols. Cresols can be removed after processing by heating or washing, without altering the surface of CNTs. [Chiou et al. 2018]

Faka'aonga'i 'o e CNT Dispersions

Ke faka'aonga'i e ngaahi lelei 'o e CNTs, kuo pau ke fakamovetevete kinautolu ki ha ngaahi me'a hange ko e polymers, 'a ia kuo fakamovetevete totonu CNTs 'oku faka'aonga'i ki hono ngaohi 'o conductive pelesitiki, ngaahi faka'ali'ali (multiple Dry), maama 'o e emitting pe diodes, ongo ki he ngaahi 'ata, ngaahi fakatata ngali feliliuaki, ngaahi selo 'o e ngaahi fetu'u , conductive e inks, ngaahi naunau 'oku ne pule'i e koloa, kau ai e ngaahi filimi, foams, filo, mo e tupenu, polymer coatings mo e adhesives, ngaue ma'olunga polymer composites 'aki ha ivi fakamisini mo ha malohi, polymer/CNT e filo, pea pehe ki hono naunau manifi mo antistatic.