Read e-book online Advanced nanomaterials and nanotechnology : proceedings of PDF

By P K Giri; D K Goswami; A Perumal

Nanoscale technology and expertise have occupied centre degree globally in smooth clinical study and discourses within the early 21st century. The allowing nature of the know-how makes it very important in glossy electronics, computing, fabrics, healthcare, power and the surroundings. This quantity comprises chosen articles provided (as Invited/Oral/Poster displays) on the second foreign convention on Read more...

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Read Online or Download Advanced nanomaterials and nanotechnology : proceedings of the 2nd International Conference on Advanced Nanomaterials and Nanotechnology, Dec 8-10, 2011, Guwahati, India PDF

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Additional resources for Advanced nanomaterials and nanotechnology : proceedings of the 2nd International Conference on Advanced Nanomaterials and Nanotechnology, Dec 8-10, 2011, Guwahati, India

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Hazard. , B 98, Kim, J. , Shim, S. , and Shim, J. , Effect of amphiphilic polyurethane nanoparticles on sorption-desorption of phenanthrene in aquifer material, 145–160, Copyright (2003), with permission from Elsevier. 4 Difference of solubilization mechanism between surfactant molecules and NACP nanoparticles. As mentioned in previous chapter, amphiphilic polymer nanoparticles and surfactant molecules absorb and solubilize phenanthrene molecules with very different ways. That is, micellelike microstructure of NACP is permanently locked in by crosslinking polymerization, so solubilization of crystalline phenanthrene can be done only by direct contact of NACP nanoparticles with crystalline phenanthrene.

Reprinted with permission from Ref. [48]. As mentioned earlier, ACP nanoparticles and SDS molecules have very different microstructure in aqueous phase. As illustrated in Fig. 9, on contact with soil matrix, dissolved SDS molecules are easily adsorbed onto soil, and SDS micelles formed by physical association are also breakdown and adsorbed onto soil matrix as a 31 32 Enhanced Desorption of PAHs from Aquifer Soil single molecule. At low concentration of SDS in aqueous phase, most of the SDS molecules are adsorbed onto soil matrix, so SDS molecules cannot extract adsorbed phenanthrene from soil matrix.

Shim, S. , and Shim, J. , Effect of amphiphilic polyurethane nanoparticles on sorption-desorption of phenanthrene in aquifer material, 145–160, Copyright (2003), with permission from Elsevier. As UAN chains have much higher molecular weight of hydrophobic segments, their hydrophobic segments have much stronger hydrophobic interactions compared with those of surfactant molecules, which makes UAN chains insoluble in water even at extremely low concentration in water. Consequently, UAN chains exist as nano-aggregates in water even at extremely low concentration in water.

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