DJALMA BATISTA DIAS
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Artigo IPEN-doc 27707 Study of renewable silica powder influence in the preparation of bioplastics from corn and potato starch2021 - AZEVEDO, LUCIANA C. de; ROVANI, SUZIMARA; SANTOS, JONNATAN J.; DIAS, DJALMA B.; NASCIMENTO, SANDI S.; OLIVEIRA, FABIO F.; SILVA, LEONARDO G.A.; FUNGARO, DENISE A.In the present study, 0.5–1.5% silica powder, from sugarcane waste ash, was incorporated into corn and potato starch bioplastics doped with sodium silicate solution to improve the properties of elongation at break and increase the thermal resistance of the bioplastics. The starch-based bioplastics were produced by casting and characterized by color analyses, transparency, opacity apparent, humidity, thickness, tensile strength, elongation at break, FTIR, DSC, SEM, and biodegradation assay. The addition of 0.5% of silica powder improved the elongation at break of the corn starch-based bioplastics. The sample CS5-P0.5 presented the highest percentage of elongation at the break among the studied samples, increased from 59.2% (without silica powder) to 78.9% (with silica powder). For potato starch bioplastic the addition of 0.5% of silica powder did not improve elongation at break but increased the thermal resistance. Increased until 17 °C for PS5-P0.5 sample and until 11 °C for PS7.5-P0.5 sample. The bioplastics of potato starch were biodegraded in 5 days, and those of corn starch took almost 40 days. Silica powder inhibited the growth of fungi in starch bioplastics.Resumo IPEN-doc 07709 Estudio de la polimerizacion del hexafluoropropileno utilizando la radiacion ultravioleta para la sintesis del perfluropolieter1997 - ANDRADE e SILVA, L.G.; LUGAO, A.B.; DIAS, D.B.; MORI, M.N.; LOPERGOLO, L.C.; GHILARDI, E.; CASTRO, A.R.M.Resumo IPEN-doc 16427 The study of ionizing radiation effect on polypropylene and rice husk ash composites2010 - ALFARO, EDUARDO F.; DIAS, DJALMA B.; SILVA, LEONARDO G.A.Resumo IPEN-doc 15854 Propriedades mecanicas e termicas de nanocompositos de poliamida 6 e argila irradiados2010 - DIAS, D.B.; VALENZUELA-DIAZ, F.R.; WIEBECK, H.; SILVA, L.G.A.Resumo IPEN-doc 15534 Study of the properties of polyethylene foams crosslinked by electron beam2006 - DIAS, D.B.; ANDRADE e SILVA, L.G.Resumo IPEN-doc 12624 Influencia da radiação ionizante na propriedades das espumas de polietileno reticulado por feixe de eletrons2006 - DIAS, D.B.; ANDRADE e SILVA, L.G.Artigo IPEN-doc 10769 Estudo das propriedades de espumas de polietileno retificado por irradiacao com feixe de eletrons2005 - DIAS, D.B.; ANDRADE e SILVA, L.G.Artigo IPEN-doc 12062 Thermogravimetry of irradiated human costal cartilage2007 - MARTINHO JUNIOR, ANTONIO C.; MACHADO, LUCI D.B.; DIAS, DJALMA B.; MATHOR, MONICA B.; HERSON, MARISA R.; MEUMAN, NILTON F.; PASQUALUCCI, CARLOS A.G.Artigo IPEN-doc 19478 Comparison between optical coherence tomography technique and mechanical compression assay to evaluate ionizing radiation effects in frozen and lyophilized bone tissue2013 - SANTIN, STEFANY P.; SANTOS, LUIZ A.U.; FREITAS, ANDERSON Z. de; MARTINHO JUNIOR, ANTONIO C.; DIAS, DJALMA B.; SOARES, FERNANDO A.N.; SEGURA PINO, EDDY; VELOSO, MARCELO N.; MATHOR, MONICA B.Artigo IPEN-doc 13415 Study of the morphology of HMS-PP (High Melt Strength Polypropylene) films2008 - OLIANI, W.L.; LIMA, L.F.C.P.; PARRA, D.F.; DIAS, D.B.; LUGAO, A.B.