Electronic textiles functionalized with conductive polymers

Detalhes bibliográficos
Autor(a) principal: Mendes, Bernardo Luís Moura
Data de Publicação: 2019
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/92222
Resumo: Smart textiles have received a lot of attention nowadays for combining two of the most prolific industries: fabrics and electronics. This was possible due to the evolution of conductive polymers, mean-ing that a material as conductive as metals with flexible properties was in the market. Its potential to integrate signals and stimuli from contact means that a myriad of applications might be in the making, spanning interest from electronics to communication, military and biomedical uses. The main goal of this work was to study different methodologies to functionalize commercial textiles with conductive polymers to obtain piezoresistive textiles. Polypyrrole (PPy) and poly(3,4-ethylenedioxythiophene) (PEDOT) are two intrinsically conduc-tive polymers used to functionalize lycra and felt textiles. Such functionalization was carried out by in situ-polymerization of pyrrole (Py) and 3,4-ethylenedioxythiophene (EDOT). Several polymerization con-ditions were evaluated to determine the most suitable ones to prepare stable conductive textiles. In-plane electrical conductivities of 6.707x10−3 Scm−1 to 1.808x10−2 Scm−1 and transversal conductivities of 1.837x10−4 Scm−1 to 2.040x10−3 Scm−1 were reached throughout textiles. Morphological, chemical and electrical characterization was carried before and out after polymerization. Piezoresistive behaviour of textiles was studied, because coated and agglomerated polymer comes into different contacts when stress is applied. Two different approaches were studied: stretch behaviour for elastic lycra ranging from 11-26kΩ and pressure behaviour for felt textiles ranging from 0.72-19.54kΩ. Finally, stability tests were studied. In this section, abrasion was performed to show the wear off textiles. Felt had the best stability with values from 3.903x10−4 S.cm−1 to 6.685x10−6 S.cm−1, while lycra had the worst results, from 1.242x10−4 S.cm−1 to 2.696x10−11 S.cm−1. Conductivity over time was studied, showing there is over a 50% conductivity decline over 6 months. Washing cycles, showed de-clines of over four orders of magnitude, compromising further use.
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spelling Electronic textiles functionalized with conductive polymersPolypyrrolePEDOTsmart textilespiezoresistiveflexible electronicsDomínio/Área Científica::Engenharia e Tecnologia::NanotecnologiaSmart textiles have received a lot of attention nowadays for combining two of the most prolific industries: fabrics and electronics. This was possible due to the evolution of conductive polymers, mean-ing that a material as conductive as metals with flexible properties was in the market. Its potential to integrate signals and stimuli from contact means that a myriad of applications might be in the making, spanning interest from electronics to communication, military and biomedical uses. The main goal of this work was to study different methodologies to functionalize commercial textiles with conductive polymers to obtain piezoresistive textiles. Polypyrrole (PPy) and poly(3,4-ethylenedioxythiophene) (PEDOT) are two intrinsically conduc-tive polymers used to functionalize lycra and felt textiles. Such functionalization was carried out by in situ-polymerization of pyrrole (Py) and 3,4-ethylenedioxythiophene (EDOT). Several polymerization con-ditions were evaluated to determine the most suitable ones to prepare stable conductive textiles. In-plane electrical conductivities of 6.707x10−3 Scm−1 to 1.808x10−2 Scm−1 and transversal conductivities of 1.837x10−4 Scm−1 to 2.040x10−3 Scm−1 were reached throughout textiles. Morphological, chemical and electrical characterization was carried before and out after polymerization. Piezoresistive behaviour of textiles was studied, because coated and agglomerated polymer comes into different contacts when stress is applied. Two different approaches were studied: stretch behaviour for elastic lycra ranging from 11-26kΩ and pressure behaviour for felt textiles ranging from 0.72-19.54kΩ. Finally, stability tests were studied. In this section, abrasion was performed to show the wear off textiles. Felt had the best stability with values from 3.903x10−4 S.cm−1 to 6.685x10−6 S.cm−1, while lycra had the worst results, from 1.242x10−4 S.cm−1 to 2.696x10−11 S.cm−1. Conductivity over time was studied, showing there is over a 50% conductivity decline over 6 months. Washing cycles, showed de-clines of over four orders of magnitude, compromising further use.Baptista, AnaFaustino, BrunoRUNMendes, Bernardo Luís Moura2020-02-05T16:34:27Z2019-1220192019-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/92222enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-05-22T17:43:14Zoai:run.unl.pt:10362/92222Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-22T17:43:14Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Electronic textiles functionalized with conductive polymers
title Electronic textiles functionalized with conductive polymers
spellingShingle Electronic textiles functionalized with conductive polymers
Mendes, Bernardo Luís Moura
Polypyrrole
PEDOT
smart textiles
piezoresistive
flexible electronics
Domínio/Área Científica::Engenharia e Tecnologia::Nanotecnologia
title_short Electronic textiles functionalized with conductive polymers
title_full Electronic textiles functionalized with conductive polymers
title_fullStr Electronic textiles functionalized with conductive polymers
title_full_unstemmed Electronic textiles functionalized with conductive polymers
title_sort Electronic textiles functionalized with conductive polymers
author Mendes, Bernardo Luís Moura
author_facet Mendes, Bernardo Luís Moura
author_role author
dc.contributor.none.fl_str_mv Baptista, Ana
Faustino, Bruno
RUN
dc.contributor.author.fl_str_mv Mendes, Bernardo Luís Moura
dc.subject.por.fl_str_mv Polypyrrole
PEDOT
smart textiles
piezoresistive
flexible electronics
Domínio/Área Científica::Engenharia e Tecnologia::Nanotecnologia
topic Polypyrrole
PEDOT
smart textiles
piezoresistive
flexible electronics
Domínio/Área Científica::Engenharia e Tecnologia::Nanotecnologia
description Smart textiles have received a lot of attention nowadays for combining two of the most prolific industries: fabrics and electronics. This was possible due to the evolution of conductive polymers, mean-ing that a material as conductive as metals with flexible properties was in the market. Its potential to integrate signals and stimuli from contact means that a myriad of applications might be in the making, spanning interest from electronics to communication, military and biomedical uses. The main goal of this work was to study different methodologies to functionalize commercial textiles with conductive polymers to obtain piezoresistive textiles. Polypyrrole (PPy) and poly(3,4-ethylenedioxythiophene) (PEDOT) are two intrinsically conduc-tive polymers used to functionalize lycra and felt textiles. Such functionalization was carried out by in situ-polymerization of pyrrole (Py) and 3,4-ethylenedioxythiophene (EDOT). Several polymerization con-ditions were evaluated to determine the most suitable ones to prepare stable conductive textiles. In-plane electrical conductivities of 6.707x10−3 Scm−1 to 1.808x10−2 Scm−1 and transversal conductivities of 1.837x10−4 Scm−1 to 2.040x10−3 Scm−1 were reached throughout textiles. Morphological, chemical and electrical characterization was carried before and out after polymerization. Piezoresistive behaviour of textiles was studied, because coated and agglomerated polymer comes into different contacts when stress is applied. Two different approaches were studied: stretch behaviour for elastic lycra ranging from 11-26kΩ and pressure behaviour for felt textiles ranging from 0.72-19.54kΩ. Finally, stability tests were studied. In this section, abrasion was performed to show the wear off textiles. Felt had the best stability with values from 3.903x10−4 S.cm−1 to 6.685x10−6 S.cm−1, while lycra had the worst results, from 1.242x10−4 S.cm−1 to 2.696x10−11 S.cm−1. Conductivity over time was studied, showing there is over a 50% conductivity decline over 6 months. Washing cycles, showed de-clines of over four orders of magnitude, compromising further use.
publishDate 2019
dc.date.none.fl_str_mv 2019-12
2019
2019-12-01T00:00:00Z
2020-02-05T16:34:27Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/92222
url http://hdl.handle.net/10362/92222
dc.language.iso.fl_str_mv eng
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dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv mluisa.alvim@gmail.com
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