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Effect of arc current on characteristics of nanocarbons prepared by cryogenic arc discharge method
Tawatchai Charinpanitkul,Kijchai Kanjanaprapakul,Nattaporn Leelaviwat,Nayot Kurukitkoson,김교선 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.6
A variety of nanocarbons (nanohorns, nanoflowers and nanoclusters) could be prepared by arc discharge in cryogenic nitrogen with either graphite–graphite or iron–graphite electrodes manipulated by a strategy of automatic electrode delivering. Based on local thermal equilibrium assumption, magnetohydrodynamic equations were taken into account for estimating the arc power efficiency of 60–84%,depending on the electrode combination. The effects of arc current on the morphology and yield of nanocarbons were investigated within a range of 75–150 A. Transmission electronmicroscopic analyses revealed that the synthesized product consisted of single-walled carbon nanohorns and multi-walled carbon nanoflowers with nominal diameters of 100–200 nm when graphite–graphite electrodes were employed but nanoclusters containing Fe nanoparticles inside carbon nanoshells with smaller size of 70–120 nm were mainly synthesized by iron–graphite electrodes subject to arc discharge in cryogenic nitrogen. 2010 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
Theerawat Suratago,Muenduen Phisalaphong,Siriporn Taokaew,Nitisak Kanjanamosit,Kijchai Kanjanaprapakul,Vorakan Burapatana 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.32 No.-
A bacterial cellulose (BC) hydrogel was modified via impregnation by diffusion of sodium alginate andcross-linking with calcium chloride solution. BC/alginate (BCA) membranes were configured,characterized, and used for pervaporation of mixtures of ethanol–water. BCA membranes were morehydrophilic with a more dense structure and showed improved affinity toward water and considerableenhancement of pervaporation performance. At a permeate pressure of 10 mmHg, the BCA membraneimpregnated with 3% (w/v) alginate solution separated water from ethanol in the feed solution (95%, w/w) with 429.9 selectivity, and a total permeate flux of 33 g/(m2 h).