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Development of composite sensors with carbon nanotubes and molecularly imprinted polymers for xylose and arabinose determination into sugarcane bagasse hydrolysates

Grant number: 17/09492-4
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): August 01, 2017
Effective date (End): December 09, 2019
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Leonardo Lataro Paim
Grantee:Miguel Sales Porto de Sousa
Home Institution: Universidade Estadual Paulista (UNESP). Campus de Rosana. Rosana , SP, Brazil
Associated scholarship(s):18/25830-0 - Development of composite sensors with carbon nanotubes and molecularly imprinted polymers for xylose and arabinose determination into sugarcane bagasse hydrolysates, BE.EP.IC

Abstract

One means of decreasing dependence in relation to fossil fuels, given the environmental impacts and the recognition that world oil reserves are slowly ending, several countries are investing in the production of second generation bioethanol. This fuel has become attractive because it can be produced from bagasse, which is a residue of sugarcane. Thus, it is extremely important to evaluate the efficiency and optimization of different processes of second generation bioethanol production, mainly in the compositional analysis of the hydrolysates from the pretreatment of lignocellulosic biomass. Therefore, the present project has the objective of developing electrochemical sensors constituted by graphite/paraffin composite electrodes and multi-walled carbon nanotubes (MWCNTs), modified with molleculary imprinted polymers. An excellent low cost option, which allows performing rapid analysis with high selectivity, sensitivity and with great possibility of miniaturization and field application. MIPs will be prepared for the quantification of pentoses (xylose and arabinose) obtained from lignocellulosic matrices. The results obtained with the sensors based on MIPs should be evaluated by the SEM, EDS, CV and Impedance techniques. In addition, MIP sensors must have excellent reproducibility and direct application to the hydrolysates of the lignocellulosic material, with the possibility of simultaneous and rapid analyzes in miniaturized and portable systems, as well as the online application of the sensors in second generation ethanol production processes. (AU)