Electrospinning of ceramic nanofibers for polymeric nanocomposites

• Grant number: 16/03667-4
• Support Opportunities: Scholarships abroad - Research
• Effective date (Start): August 01, 2016
• Effective date (End): July 31, 2017
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Rosario Elida Suman Bretas
• Grantee: Rosario Elida Suman Bretas
• Host Investigator: Wolfgang Sigmund
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Research place: University of Florida, Gainesville (UF), United States

Abstract

Responsible: Profa. Rosario E.S. Bretas, Supervisor: Prof. Wolfgang Sigmund. Polymeric nanocomposites are materials made of a polymeric matrix in which nanoparticles (particles with at least one dimension lower than 100 nm) are homogeneously distributed forming a percolating network. In this project these materials will be developed for applications in photo-generation and storage of electrical energy. Percolation will be obtained by using photo-sensitive and energy storage ceramic nanoparticles (NP) of high aspect ratio L/D (L=length, D=diameter), obtained by electrospinning and polymers that form nanometric domains like block copolymers (BCP) and thermoplastic polyurethanes (TPU)(foamed or not). It is well known that BCP can develop nanodiscrete structures like cylinders, lamellas, gyroid or vesicles, where the NP can be inserted, without losing their functionality. Therefore, photo-sensible NP like some organic and inorganic perovskites and energy storage NP like some inorganic perovskites will be used after proper compatibilization. The influence of the aspect ratio of these NP in the percolation threshold, in the domains arrangement of the BCP and TPU and on the final properties of the nanocomposites will also be studied. The insertion of the NP into the polymers will be done by "casting" (film and electrospinning) and melt processes (injection and compression molding); finally their electrical properties and their microstructure will also be analyzed. These materials have high potential for use in solar cells, electromagnetic protection, electrostatic dissipation, capacitors, sensors, among other novel applications. (AU)

Scientific publications

(4)

(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)

C. C. NASCIMENTO; R. E. S. BRETAS; M. R. MORELLI. Síntese da perovskita [KNbO3]0,9[BaNi0,5Nb0,5O3-δ]0,1 por combustão em solução. Cerâmica, v. 65, n. 373, p. 45-53, 2019-01-00. (15/23329-3, 16/03667-4, 06/61008-5)

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, MAY 5 2019. (13/03118-2, 14/17597-2, 16/03667-4, 15/23329-3, 13/07296-2)

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, SEP 10 2018. (13/07296-2, 14/17597-2, 16/03667-4, 13/03118-2)

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, 2021-03-12. (16/03667-4, 13/03118-2, 14/17597-2, 13/07296-2)