Thermosensitive poly(N-vinylcaprolactam) as a transmission light regulator in smart windows

Autor(es)

Sala, Renata L. ^[1] ; Goncalves, Ricardo H. ^[1] ; Camargo, Emerson R. ^[1] ; Leite, Edson R. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Fed Univ Sao Carlos UFSCar, Dept Chem, Rod Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[2] CNPEM, Brazilian Nanotechnol Natl Lab LNNano, Rua Giusepe Maximo Scalfaro 10000, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SOLAR ENERGY MATERIALS AND SOLAR CELLS; v. 186, p. 266-272, NOV 2018.
• Citações Web of Science: 4

Resumo

Upcoming generation of smart windows requires simple design, fast stimulus response and cost-effective production. Aiming these features, we reported a new approach of switchable devices based on the thermosensitive polymer poly(N-vinylcaprolactam) (PNVCL) and facile assembly of the components (FTO layers and polymer). Its optical/color change from transparent to opaque is temperature-dependent and activated by induced Joule heating of conductive substrates. Therefore, the reported devices showed fast reversible response (less than 60 s) by small input power and adjustable opaqueness according to polymer concentration. In opposite to traditional electrochromic smart windows dependence of the kinetics charge-transfer reaction, the observed features are triggered by the thermodynamic mechanism of the reversible coil-globule transition from PNVCL suspension, which can lead to stable performance of the proposed device. (AU)

• Processo FAPESP: 13/25663-2 - Desenvolvimento de Nanocompósitos Poliméricos Aplicados em Engenharia Tecidual
• Beneficiário: Renata Lang Sala
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 15/13958-3 - Biomateriais nanocompósitos a base de hidrogéis termossensíveis
• Beneficiário: Emerson Rodrigues de Camargo
• Modalidade de apoio: Auxílio à Pesquisa - Regular