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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampBurgo, Thiago Augusto de Lima-
dc.contributor.authorunicampFrancisco, Kelly Roberta-
dc.contributor.authorunicampClinckspoor, Karl Jan-
dc.contributor.authorunicampGalembeck, Fernando-
dc.typeArtigopt_BR
dc.titleTriboelectricity: macroscopic charge patterns formed by self-arraying ions on polymer surfacespt_BR
dc.contributor.authorBurgo, Thiago A. L.-
dc.contributor.authorDucati, Telma R. D.-
dc.contributor.authorFrancisco, Kelly R.-
dc.contributor.authorClinckspoor, Karl J.-
dc.contributor.authorGalembeck, Fernando-
dc.contributor.authorGalembeck, Sergio E.-
dc.subjectPolímerospt_BR
dc.subject.otherlanguagePolymerspt_BR
dc.description.abstractTribocharged polymers display macroscopically patterned positive and negative domains, verifying the fractal geometry of electrostatic mosaics previously detected by electric probe microscopy. Excess charge on contacting polyethylene (PE) and polytetrafluoroethylene (PTFE) follows the triboelectric series but with one caveat: net charge is the arithmetic sum of patterned positive and negative charges, as opposed to the usual assumption of uniform but opposite signal charging on each surface. Extraction with n-hexane preferentially removes positive charges from PTFE, while 1,1-difluoroethane and ethanol largely remove both positive and negative charges. Using suitable analytical techniques (electron energy-loss spectral imaging, infrared microspectrophotometry and carbonization/colorimetry) and theoretical calculations, the positive species were identified as hydrocarbocations and the negative species were identified as fluorocarbanions. A comprehensive model is presented for PTFE tribocharging with PE: mechanochemical chain homolytic rupture is followed by electron transfer from hydrocarbon free radicals to the more electronegative fluorocarbon radicals. Polymer ions self-assemble according to Flory–Huggins theory, thus forming the experimentally observed macroscopic patterns. These results show that tribocharging can only be understood by considering the complex chemical events triggered by mechanical action, coupled to well-established physicochemical concepts. Patterned polymers can be cut and mounted to make macroscopic electrets and multipolespt_BR
dc.relation.ispartofLangmuir: the ACS journal of surfaces and colloidspt_BR
dc.relation.ispartofabbreviationLangmuirpt_BR
dc.publisher.cityWashington, DCpt_BR
dc.publisher.countryEstados Unidospt_BR
dc.publisherAmerican Chemical Societypt_BR
dc.date.issued2012-
dc.date.monthofcirculationApr.pt_BR
dc.language.isoengpt_BR
dc.description.volume28pt_BR
dc.description.issuenumber19pt_BR
dc.description.firstpage7407pt_BR
dc.description.lastpage7416pt_BR
dc.rightsFechadopt_BR
dc.sourceWOSpt_BR
dc.identifier.issn0743-7463pt_BR
dc.identifier.eissn1520-5827pt_BR
dc.identifier.doi10.1021/la301228jpt_BR
dc.identifier.urlhttps://pubs.acs.org/doi/10.1021/la301228jpt_BR
dc.description.sponsorshipCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQpt_BR
dc.description.sponsorshipFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPpt_BR
dc.description.sponsordocumentnumberSem informaçãopt_BR
dc.description.sponsordocumentnumberSem informaçãopt_BR
dc.date.available2020-09-08T13:38:14Z-
dc.date.accessioned2020-09-08T13:38:14Z-
dc.description.provenanceSubmitted by Thais de Brito Barroso (tbrito@unicamp.br) on 2020-09-08T13:38:14Z No. of bitstreams: 0. Added 1 bitstream(s) on 2021-01-04T15:12:50Z : No. of bitstreams: 1 000303969000012.pdf: 4264116 bytes, checksum: 3db186aac03d2dceb4ea50d06bee9b5c (MD5)en
dc.description.provenanceMade available in DSpace on 2020-09-08T13:38:14Z (GMT). No. of bitstreams: 0 Previous issue date: 2012en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/348828-
dc.contributor.departmentSem informaçãopt_BR
dc.contributor.departmentSem informaçãopt_BR
dc.contributor.departmentSem informaçãopt_BR
dc.contributor.departmentDepartamento de Físico-Químicapt_BR
dc.contributor.unidadeInstituto de Químicapt_BR
dc.contributor.unidadeInstituto de Químicapt_BR
dc.contributor.unidadeInstituto de Químicapt_BR
dc.contributor.unidadeInstituto de Químicapt_BR
dc.identifier.source000303969000012pt_BR
dc.creator.orcid0000-0003-2521-3574pt_BR
dc.creator.orcidSem informaçãopt_BR
dc.creator.orcid0000-0002-0916-2773pt_BR
dc.creator.orcid0000-0003-4778-5442pt_BR
dc.type.formArtigopt_BR
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