• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Master's Dissertation
DOI
10.11606/D.88.2003.tde-01122014-113352
Document
Author
Full name
Marcia Yumi Teruya
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2003
Supervisor
Committee
Alves, Neri (President)
Bianchi, Rodrigo Fernando
Pessan, Luiz Antonio
Title in Portuguese
Blendas condutoras elétricas obtidas a partir do látex de seringueira Hevea Brasiliensis com polianilina
Keywords in Portuguese
Borracha natural
Condutividade elétrica.
Nanocamadas
Polianilina
Abstract in Portuguese
É grande o interesse em combinar as propriedades mecânicas e elétricas de diferentes materiais poliméricos. Neste trabalho, filmes de Borracha Natural com camadas superficiais condutoras de polianilina (PANI) são preparados e caracterizados por diferentes técnicas. A PANI dopada foi depositada em ambos os lados do filme de borracha por polimerização química "in situ" da anilina a temperatura ambiente. O processo da polimerização da PANI "in situ" foi otimizado variando a concentração dos reagentes químicos com o objetivo de se obter uma camada de PANI com espessura desejada, boa adesão na borracha e que produzisse também aumento da condutividade elétrica na superfície. As amostras obtidas são caracterizadas usando-se Microscopia Eletrônica de Varredura, Microscopia Óptica, Difratometria de raios-X, análise por Calorimetria Diferencial de Varredura, análise Termo-Dinâmico-Mecânica, análise Termogravimétrica, Espectroscopia no FT-IR, Ensaio Mecânico e condutividade elétrica na superfície e no volume dos filmes preparados. Os resultados mostram que os filmes produzidos são do tipo multicamadas, pois não há uma interpenetração da PANI na borracha. A melhor condutividade e uniformidade é obtida com filmes preparados com três deposições, atingindo a ordem de 10-7 S/cm
Title in English
Electrical conductive blends obtained using the rubber tree Hevea brasiliensis latex with polyaniline
Keywords in English
Electrical conductive
Nanolayers
Natural rubber
Polyaniline
Abstract in English
The combination of properties of different polymeric materials in one sample is of great interest. In this work natural rubber films covered with a layer of conductive polyaniline (PANI) were prepared and studied by means of several experimental techniques. The doped PANI layer was deposited onto both rubber films surfaces by the "in situ" polymerization technique. The polymerization of PANI was performed at room temperature and the deposition process was optimized in order to obtain a PANI layer with an adequate thickness, good adhesion to the rubber and to promote the increase of its surface electric conductivity. Samples were characterized employing the scanning electron microscopy, optical microscopy, X-ray diffractometry, differential scanning calorimetry, thermo gravimetric analysis, dynamic mechanical thermal analysis, mechanical analysis and surface/volume electric conductivity. Results showed that the formed films consisted of a PANI layer that did not penetrated in the rubber. The better uniformity of deposition and maximum electric conductivity of the order of 10-7 S/cm was obtained on films that were prepared by deposition of three PANl layers
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
MarciaYumiTeruyaM.pdf (15.63 Mbytes)
Publishing Date
2014-12-03
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
Centro de Informática de São Carlos
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2020. All rights reserved.