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Hybrid nanocomposites based on block copolymers for application in supercapacitors

Grant number: 14/17597-2
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): December 01, 2014
Effective date (End): August 31, 2016
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal researcher:Rosario Elida Suman Bretas
Grantee:João Paulo Ferreira Santos
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated scholarship(s):15/09924-6 - Self-assembly and synthesis of PS-b-PVDF-b-PS/MWCNTs hybrid nanocomposites for supercapacitors, BE.EP.DR


The purpose of this project is to obtain hybrid nanocomposites based on block copolymers (CB) and multi-walled carbon nanotubes (MWCNT) for application in supercapacitors. Copolymers of styrene with butadiene will be used, mainly SBS and SEBS whose polystyrene blocks exhibit different morphologies, lamellar for SBS and cylindrical for SEBS, both with nanometer dimensions. The nanocomposites will be obtained by melt extrusion and injection molding. The potential of these structures for use as supercapacitors will be evaluated by electrical conductivity measurements and impedance spectroscopy. The influence of processing variables on their micro/nanostructures and orientation of both, domains of the blocks and the MWCNT, will be studied and compared by small-angle and wide angle X-ray scattering (SAXS and WAXS, respectively), infrared spectroscopy (FTIR) and transmission (TEM) and scanning (SEM) electron microscopy. The processability, the thermo-mechanical and the rheological behavior of these new systems will be characterized and evaluated. The study will provide a correlation between the structure developed in these new systems and the processing conditions in order to obtain the most appropriate arrangements for the production of nanocomposites with higher dielectric constant and permittivity, lower rates of energy loss and better processabilities. In a second step, it is intended to exploit the technique of atom-transfer radical-polymerization (ATRP) and the "self-assembly" of CB in order to create better affinities between MWCNT and block copolymers, which could be even more promising in terms of properties for supercapacitors. This step will be carried out in cooperation and partnership with Cornell University. (AU)

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
FERREIRA SANTOS, JOAO PAULO; FRANCA MELO, GUILHERME HENRIQUE; GONCALVES, ANDRE MARINO; EIRAS, JOSE ANTONIO; SUMAN BRETAS, ROSARIO ELIDA. Flexible conductive poly(styrene-butadiene-styrene)/carbon nanotubes nanocomposites: Self-assembly and broadband electrical behavior. Journal of Applied Polymer Science, v. 135, n. 34, . (13/03118-2, 14/17597-2, 16/03667-4, 13/07296-2)
LUDIMILLA BARBOSA FERREIRA; RAYANE DE SOUZA FERNANDES; ROSARIO ELIDA SUMAN BRETAS; JOÃO PAULO FERREIRA SANTOS. Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior. POLIMEROS-CIENCIA E TECNOLOGIA, v. 30, n. 4, p. -, . (13/03118-2, 14/17597-2, 16/03667-4, 13/07296-2)
FERREIRA SANTOS, JOAO PAULO; CARVALHO, BENJAMIM DE MELO; SUMAN BRETAS, ROSARIO ELIDE. Remarkable change in the broadband electrical behavior of poly(vinylidene fluoride)-multiwalled carbon nanotube nanocomposites with the use of different processing routes. Journal of Applied Polymer Science, v. 136, n. 17, . (15/23329-3, 13/07296-2, 13/03118-2, 14/17597-2, 16/03667-4)
FERREIRA SANTOS, JOAO PAULO; ARJMAND, MOHAMMAD; FRANCA MELO, GUILHERME HENRIQUE; CHIZARI, KAMBIZ; SUMAN BRETAS, ROSARIO ELIDA; SUNDARARAJ, UTTANDARAMAN. Electrical conductivity of electrospun nanofiber mats of polyamide 6/polyaniline coated with nitrogen-doped carbon nanotubes. MATERIALS & DESIGN, v. 141, p. 333-341, . (14/17597-2)
FERREIRA SANTOS, JOAO PAULO; DA SILVA, ALINE BRUNA; ARJMAND, MOHAMMAD; SUNDARARAJ, UTTANDARAMAN; SUMAN BRETAS, ROSARIO ELIDA. Nanofibers of poly(vinylidene fluoride)/copper nanowire: Microstructural analysis and dielectric behavior. EUROPEAN POLYMER JOURNAL, v. 101, p. 46-55, . (14/17597-2, 15/09924-6)

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