Characterization of dispersion of carbon nanotubes in polymer matrices

2012 ◽  
Vol 1371 ◽  
Author(s):  
Laura Peña-Parás ◽  
Hubert Phillips ◽  
Enrique V. Barrera
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Scanning Electron Microscopy ◽  
Carbon Nanotube ◽  
Vinyl Ester ◽  
Fixed Frequency ◽  
Ultrasonic Probe ◽  
Scanning Electron

ABSTRACTDispersions of carbon nanotube polymer composites were characterized by Raman mapping.Single-walled nanotubes (SWNTs), double-walled nanotubes (DWNTs), multi-walled nanotubes (MWNTs), and XD-grade carbon nanotubes (XD-CNTs) were dispersed in a vinyl ester (VE) resin using an ultrasonic probe at a fixed frequency. SWNTs were functionalized with succinic acid peroxide (SAP) to enhance dispersion. Increasing ultrasonication energy was found to improve the distribution of carbon nanotubes (CNTs) and decrease the size of ropes, whereas excessive amounts of energy were found to result in damage. The quality of dispersion was verified through optical microscopy and scanning electron microscopy (SEM).

Characterization of air plasma-activated carbon nanotube electrodes for the removal of lead ion

2014 ◽  
Vol 69 (11) ◽  
pp. 2272-2278 ◽  
Author(s):  
Lingfang Yang ◽  
Zhou Shi ◽  
Wenhao Yang
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Scanning Electron Microscopy ◽  
Carbon Nanotube ◽  
Lead Ion ◽  
Air Plasma ◽  
Surface Functional Groups ◽  
Plasma Activation ◽  
Scanning Electron

Carbon nanotube electrodes were prepared by pressing a mixture of carbon nanotubes and polytetrafluoroethylene (which acted as a binder) on a stainless steel net collector, and the electrodes were subsequently activated in our self-designed plasma apparatus, using air plasma. The morphology and surface functional groups of the electrodes were characterized using scanning electron microscopy and Fourier transform infrared spectroscopy, respectively. The results showed that the electrodes activated by air plasma possessed a rougher surface and more oxygen-containing groups than the raw electrodes, properties that were beneficial for their electrosorption performance. After 5 min of air plasma activation, the lead ion electrosorption capacity of the activated electrodes (measured at 450 mV) increased to 3.40 mg/g, which was 73% higher than the capacity of the non-activated, raw electrode, and 5.76 times the adsorption capacity of the raw electrode at 0 mV. The results of this study indicate that air plasma activation can be used to effectively enhance the electrosorption capacity of carbon nanotube electrodes.

scholarly journals Analyzing the quality of carbon nanotube dispersions in polymers using scanning electron microscopy

Carbon ◽  
2007 ◽  
Vol 45 (6) ◽  
pp. 1279-1288 ◽  
Author(s):  
Josef Z. Kovacs ◽  
Kjer Andresen ◽  
Jan Roman Pauls ◽  
Claudia Pardo Garcia ◽  
Michael Schossig ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Carbon Nanotube ◽  
Scanning Electron

Properties of Carbon Nanotube - Polymer Composites

2008 ◽  
Vol 589 ◽  
pp. 117-122
Author(s):  
Andrea Ádámné Major ◽  
Károly Belina
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Scanning Electron Microscopy ◽  
Thermal Properties ◽  
Carbon Nanotube ◽  
Dynamic Shear ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites ◽  
Concentration Series ◽  
Scanning Electron

In the last ten years carbon nanotube composites are in the focus of the researchers of polymer blends. Different composition of carbon nanotubes and polymers were produced by a special mixing unit called Infinitely Variable Dynamic Shear Mixer (IDMX). In the experiments polypropylene and polycarbonate polymers were used as matrix materials. Nanotube masterbatches were used to prepare different compositions. Concentration series were manufactured by the dynamic mixer. The prepared materials were characterised by scanning electron microscopy. Mechanical, electrical and burning properties of the materials were also determined. Thermal properties were examined by DSC.

scholarly journals Pemanfaatan Carbon Nanotube dan Karbon Aktif sebagai Elektroda Model Desalinasi

2008 ◽  
Vol 11 (3) ◽  
pp. 90-95
Author(s):  
Eko Agung Widagdo ◽  
Pardoyo Pardoyo ◽  
Agus Subagio
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Scanning Electron Microscopy ◽  
Carbon Nanotube ◽  
Active Carbon ◽  
Flow Through ◽  
Scanning Electron

Telah dilakukan penelitian tentang pemanfaatan carbon nanotube dan karbon aktif sebagai elektroda model desalinasi. Elektroda dibuat dari komposit carbon nanotubes/active carbon (CNT/AC). Lempeng elektroda dibuat menggunakan metode pressing dengan pengaturan suhu 180°C. Karakterisasi elektroda dilakukan dengan Scanning Electron Microscopy (SEM). Elektroda yang terbentuk digunakan pada prototipe sistem Flow Through Capasitor (FTC) dengan larutan NaCl dan MgCl2.6H2O sebagai larutan uji. Pemberian tegangan pada prototipe dengan melakukan variasi tegangan pada 1, 1,5, 2, dan 3 volt. Kapasitas serapan ion-ion ditentukan dengan melakukan waktu pengaliran larutan pada 20, 30, 40, 50, dan 60 menit. Hasil penurunan konsentrasi diketahui dari pengukuran konsentrasi ion-ion logamnya dengan instrumen AAS. Hasil penelitian yang diperoleh berupa elektroda model desalinasi dengan ukuran panjang, lebar, dan tebal masing-masing 115, 75, dan 1,5 mm. Nilai hambatan elektroda adalah 32,5 ohm, komposisi optimum karbon dan binder yaitu 80:20, dan tegangan optimum pada 1,5 volt. Jumlah elektroda model desalinasi adalah 7 pasang dan kapasitas serapan ion komposit elektroda terhadap ion Na+ dan Mg2+ selama 60 menit, masing-masing sebesar 58,51 dan 53,68%.

scholarly journals Pemurnian Carbon Nanotubes menggunakan Larutan HNO3 dengan metode Pencucian Biasa dan Reflux (Halaman 1 s.d. 4)

2014 ◽  
Vol 17 (49) ◽  
Author(s):  
Agus Subagio ◽  
Pardoyo ◽  
Priyono ◽  
Rike Yudianti ◽  
Khasan Rowi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Scanning Electron Microscopy ◽  
Carbon Nanotube ◽  
Energy Dispersive ◽  
X Ray ◽  
Scanning Electron

Telah dilakukan penelitian berkaitan pemurnian carbon nanotubes (CNT) dengan metode pencucian biasa dan reflux menggunakan larutan HNO3. Pemurnian menggunakan metode pencucian biasa dilakukan dengan memasukkan CNT ke dalam 25 ml larutan HNO3 dengan variasi konsentrasi 25, 45 dan 65% di dalam gelas beker. Selanjutnya dilakukan pengadukan dan didiamkan selama 30 menit. Hasil pencucian disaring dengan kertas saring dan residunya dikeringkan di dalam oven dengan temperatur 120oC selama 1 jam. Sedangkan metode reflux dilakukan pada temperatur 100oC selama 4 jam menggunakan larutan HNO3 dengan variasi konsentrasi 25, 45 dan 65%. CNT hasil pemurnian selanjutnya dikeringkan di dalam oven dengan temperatur 120°C selama semalam. Carbon nanotube sebelum dan sesudah pemurnian dianalisis menggunakan Scanning Electron Microscopy (SEM) dan Energy Dispersive X-Ray Spectroscopy (EDS). Hasil penelitian menunjukkan bahwa tingkat kemurnian CNT yang paling baik dengan menggunakan metode pencucian reflux pada konsentrasi HNO3 sebesar 65%.  

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