Casting and inkjet printable photochromic films based on polymethylmethacrylate - Phosphotungstic acid

Autor(es)

Espindola, A. ^[1] ; Goncalves, N. S. ^[1] ; Nalin, M. ^[2] ; Ribeiro, S. J. L. ^[2] ; Barud, H. S. ^[3] ; Molina, C. ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ Sao Paulo UNIFESP, Dept Chem, Diadema, SP - Brazil

^[2] Sao Paulo State Univ UNESP Araraquara, Chem Inst, Araraquara, SP - Brazil

^[3] Univ Araraquara UNIARA, Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Optical Materials; v. 96, OCT 2019.
• Citações Web of Science: 0

Resumo

The incorporation of polyoxometalates in suitable matrices has been a main effort to produce transparent photochromic materials. Polymeric films based on high transparent polymethylmethacrylate (PMMA) containing phosphotungstic acid (PWA) have been obtained by casting and also by inkjet printing. In this investigation, polymeric PMMA matrix containing PWA were developed in an appropriate ratio of CH2Cl2/THF solvents to provide suitable transparent solution. PMMA/PWA composites obtained by casting were characterized by IR-ATR, Raman, XRD, TG/DTG, UV-Vis. Inkjet printing solution were characterized by surface tension (ST), viscosity and contact angle (CA) on glass substrate and films by optical microscopy. Infrared-ATR and Raman spectroscopies showed that the polyoxometalate structure was preserved in the polymeric matrix and the interaction between them occurred due to electrostatic forces. XRD indicated that PMMA and photochromic films were amorphous and display thermal stability up to 300 degrees C. Upon the UV irradiation, transparent films become blue and the photobleaching process were performed as a function of the temperature in a presence of air. These high transparent and photosensitive photochromic films present potential application as coating by casting and miniatured devices by inkjet printing. (AU)

• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 12/02708-8 - Filmes híbridos fotocrômicos sobre substrato flexível obtidos pelo processo sol gel depositados por impressora jato de tinta
• Beneficiário: Celso Molina
• Modalidade de apoio: Auxílio à Pesquisa - Regular