@article{(Open Science Index):https://publications.waset.org/pdf/4698, title = {Polyethylenimine Coated Carbon Nanotube for Detecting Rancidity in Frying Oil}, author = {Vincent Lau Chun Fai and Yang Doo Lee and Kyongsoo Lee and Keun-Soo Lee and Shin-Kyung and Byeong-Kwon Ju}, country = {}, institution = {}, abstract = {Chemical detection is still a continuous challenge when it comes to designing single-walled carbon nanotube (SWCNT) sensors with high selectivity, especially in complex chemical environments. A perfect example of such an environment would be in thermally oxidized soybean oil. At elevated temperatures, oil oxidizes through a series of chemical reactions which results in the formation of monoacylglycerols, diacylglycerols, oxidized triacylglycerols, dimers, trimers, polymers, free fatty acids, ketones, aldehydes, alcohols, esters, and other minor products. In order to detect the rancidity of oxidized soybean oil, carbon nanotube chemiresistor sensors have been coated with polyethylenimine (PEI) to enhance the sensitivity and selectivity. PEI functionalized SWCNTs are known to have a high selectivity towards strong electron withdrawing molecules. The sensors were very responsive to different oil oxidation levels and furthermore, displayed a rapid recovery in ambient air without the need of heating or UV exposure.}, journal = {International Journal of Chemical and Molecular Engineering}, volume = {5}, number = {2}, year = {2011}, pages = {181 - 184}, ee = {https://publications.waset.org/pdf/4698}, url = {https://publications.waset.org/vol/50}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 50, 2011}, }