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Combined Process (combined + process)

Distribution by Scientific Domains
Polymers and Materials Science75%

Selected Abstracts

A Combined Process of In Situ Functionalization and Microwave Treatment to Achieve Ultrasmall Thermal Expansion of Aligned Carbon Nanotube,Polymer Nanocomposites: Toward Applications as Thermal Interface Materials

ADVANCED MATERIALS, Issue 23 2009
Wei Lin
Ultrasmall thermal expansion of aligned carbon nanotube,epoxy composites at temperatures below and above the glass transition is achieved by a novel combined process of in situ functionalization and microwave treatment. Carbon nanotube,polymer interfacial bonding is the key to the reduced thermal expansion, enhanced storage modulus, and improved thermal conductivity. [source]

Centrifugal Gel Casting: A Combined Process for the Consolidation of Homogenous and Reliable Ceramics

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 2 2010
Saeed Maleksaeedi
In this work, a combined process, called centrifugal gel casting (CGC), was proposed for the fabrication of homogenous and reliable monolithic and composite ceramics starting from submicrometer-sized powders. This method exploits the advantages of both conventional gel casting (GC) and centrifugal slip casting (CSC), while overcoming the limitations associated with the two methods. Via this process, a relatively low centrifugal force is applied to form a highly concentrated slurry in the mold cavity, which is then followed by in situ polymerization of slurry during gelation. In this work, concentrated alumina slurries with different solid contents from 45 to 65 vol% were consolidated by the three forming methods mentioned above. Various properties of green and fired products were measured and compared. Shorter processing time, lower centrifugal force, higher green strength, and minimal segregation are observed to be the characteristics of CGC in comparison with CSC. In situ elimination of bubbles with no need for degassing and the ability to remove heterogeneities, on top of high reliability and the potential to process higher viscosity slurries, are the main advantages of this method over the conventional GC. [source]

A Combined Hydroxylation of 3-Cyanopyridine to 3-Cyano-6-hydroxypyridine and 6-Hydroxynicotinic Acid by Resting Cells of Comamonas testosteroni JA1 Grown on Nicotinic Acid

ENGINEERING IN LIFE SCIENCES (ELECTRONIC), Issue 4 2005
S. Yuan
Abstract A strain of Comamonas testosteroni,JA1 known for its capacity to hydroxylate 3-cyanopyridine to 3-cyano-6-hydroxypyridine was found to be also capable to hydroxylate nicotinic acid at a higher rate. In the course of the induced cultivation the forming 6-hydroxynicotinic acid was degraded either slightly, in the presence of nicotinic acid in the medium, or faster, in the absence of nicotinic acid. In a combined process of hydroxylation of nicotinic acid by growing culture and hydroxylation of 3-cyanopyridine by resting cells of Comamonas testosteroni,JA1, not only an additional amount of 50.38,g of solid 6-hydroxynicotinic acid was produced from 1,L of cultivation broth with a 99.97,% molar conversion yield, but also the yield of 3-cyano-6-hydroxypyridine produced was more than doubled. This can be compared to that of the resting cells from the induced cultivation broth where within 8,h an amount of 5.77,g of solid 3-cyano-6-hydroxypyridine was produced by resting cells from 1,L of the cultivation broth. This also was superior to 4.39,g/L of cultivation broth of resting cells reported in the literature. [source]

Centrifugal Gel Casting: A Combined Process for the Consolidation of Homogenous and Reliable Ceramics

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 2 2010
Saeed Maleksaeedi
In this work, a combined process, called centrifugal gel casting (CGC), was proposed for the fabrication of homogenous and reliable monolithic and composite ceramics starting from submicrometer-sized powders. This method exploits the advantages of both conventional gel casting (GC) and centrifugal slip casting (CSC), while overcoming the limitations associated with the two methods. Via this process, a relatively low centrifugal force is applied to form a highly concentrated slurry in the mold cavity, which is then followed by in situ polymerization of slurry during gelation. In this work, concentrated alumina slurries with different solid contents from 45 to 65 vol% were consolidated by the three forming methods mentioned above. Various properties of green and fired products were measured and compared. Shorter processing time, lower centrifugal force, higher green strength, and minimal segregation are observed to be the characteristics of CGC in comparison with CSC. In situ elimination of bubbles with no need for degassing and the ability to remove heterogeneities, on top of high reliability and the potential to process higher viscosity slurries, are the main advantages of this method over the conventional GC. [source]