Phosphorylation of arylated mwcnts was then achieved

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Unformatted text preview: e presence of phosphorus in the Tpp -MWCNTs which was very crucial in our research could be seen in the XPS spectrum and EDS spectrum. Raman spectroscopy rev ealed that the graphite band (G) and defect band (D) intensities ratio (IG/ID) was decreasing from 4.18 to 3.72, for pristine MWCNTs and Tpp-MWCNTs respectively. TGA was also used for the thermal studies of purified MWCNTs and Tpp-MWCNTs. The synthesis of Tpp-MWCNTs was successfully carried out as proven by the characterization techniques. MAT-O16 MANGROVE (RHIZOPHORA APICULATA) AND ITS MONOMER (CATECHIN) AS POTENTIAL CORROSION INHIBITORS FOR COPPER IN 0.5 M HCl Affaizza Mohamad Shah, Afidah Abd. Rahim, shafida A. Hamid and Solhan Yahya School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: afidah@usm.my Mangrove tannin and its monomer (catechin) as a non -toxic corrosion inhibitor of copper in 0.5 M hydrochloric acid (HCl) using polarisation techniques, electrochemical impedance spectroscopy (EIS) , weight loss measurements and scanning electron microscopy (SEM) have been studied. Potentiodynamic polarisation measurements showed that the presence of mangrove tan nin and catechin in 0.5 M HCl affected mainly the cathodic process for copper and decreased the corrosion current and shifted the corrosion potential towards more negative values. Weight loss measurements indicated that the inhibition efficiency of mangrove tannin and catechin increases with increasing concentrations. Results obtained from the weight loss, potentiodynamic polarisation and impedance measurements showed similar trends of inhibition efficiency. A change of morphology was observed after the addition of inhibitor as shown from SEM analysis. The inhibition efficiency of mangrove tannin and catechin was compared to that of quebracho tannin. 150 3rd ICYC 2010 Universiti Sains Malaysia MAT-O17 23rd-25th June 2010 PREPARATION OF SOLID ELECTROLYTES FROM ORGANIC-INORGANIC COMPOSITE MATERIALS OF EPOXIDISED NATURAL RUBBER (ENR-50) AND TITANIA ALKOXIDES Siti Mutrofin,...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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