Preparation of polymer solutions for the obtaining of nanofibers by electrospinning / Preparação de soluções poliméricas para a obtenção de nanofibras por electrospinning

• Autor(a) principal: Silva, Luana Góes Soares da
• Data de Publicação: 2022
• Outros Autores: Alves, Annelise Kopp
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Veras
• Texto Completo: https://ojs.brazilianjournals.com.br/ojs/index.php/BRJD/article/view/44820
• topic: polyvinylpyrrolidone; titanium dioxide; nanofiber; electrospinning; photocatalysis.

The preference for using nanomaterials is due to properties such as small particle size, diversified shape and large specific surface area. Numerous polymer solutions can be prepared for use in electrospinning, such as: polyvinyl alcohol (PVA), poly-L-lactic acid (PLLA), polyvinylpyrrolidone (PVP), collagen, among others. In this work TiO2 nanofibers were synthesized by electrospinning, through the preparation of polymer solutions containing polyvinylpyrrolidone. The samples were analyzed by ray diffraction (DRX), by scanning electron microscopy (SEM) for microstructural analysis, and the photocatalytic evaluation, by photodegradation tests of 125 mL of a 20 ppm solution of the methyl orange. The partial results show that TiO2 nanofibers treated at a temperature of 650 °C showed more efficiency in the degradation of the methyl orange dye. They showed greater photoactivity in the tests, due to the presence of the anatase phase, which is proven to be the most photoactive phase of TiO2.