Electrospinning fibers of natural rubber with polyaniline

Author(s)

Guilherme Dognani

• Document type: Master's Dissertation
• Press: Presidente Prudente. 2016-02-19.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Ciências e Tecnologia. Presidente Prudente
• Defense date: 2016-01-22
• Advisor: Aldo Eloizo Job; Deuber Lincon da Silva Agostini

Abstract

The electrospinning technique has been used to obtain fibers with various polymer materials. In this work were developed in an unprecedented fibers electrospun from natural rubber and polyaniline. For this technique, fibers mats were obtained with fiber diameter of less than 1 micrometers. For the development of these electrospun mats became necessary to first perform an extensive study on the process parameters, which consisted in varying the flow of polymer solution at 0.1, 0.25, 0.5 ml/h, the voltage applied to the process 10, 12.5, 15 kV and rotation of the collector where the fibers were deposited on 30, 40, 50 rpm. After studying the electrospinning parameters, it selected a series with the best parameters, which provided obtaining natural rubber mats called NR. These mats were covered with polyaniline by in situ polymerization method, getting NR/PAni doped and NR/PAni undoped mats. For purposes of comparison were also produced membranes by casting method, which were characterized as its electrical properties, which showed good results, behaving as ohmic materials reaching the conductivity on the order of 10-6 S/m for NR/PAni doped, entering among the semiconductor materials. In addition to the electrical properties were also investigated the thermal, spectroscopic and morphological materials properties. These results showed that it is possible produced natural rubber fibers electrospun forming diameter fibers that have reached minimum values of up to 0.92 micrometers. (AU)

• FAPESP's process: 13/18692-6 - Electrospinning nanofibers vucanized natural rubber with polyaniline
• Grantee: Guilherme Dognani
• Support Opportunities: Scholarships in Brazil - Master