Eventos - Resumos
URI Permanente para esta coleçãohttps://repositorio.ipen.br/handle/123456789/8932
Navegar
Submissões Recentes
Resumo IPEN-doc 31813 Análise de fenóis prioritários em águas subterrâneas2025 - MERIDA, GIANCARLA V. S. C.; OTOMO, JULIANA I.; PRADO, DIEGO R. A.; RODRIGUES, ELAINE A.; ANDRADE, DELVONEI A.; BUSTILLOS, OSCAR V.Resumo IPEN-doc 31812 Análise de bio-óleos produzidos pela técnica de extração de microalgas e esgoto sanitário por meio do GC/MS2025 - AVILA, NICOLE; OTOMO, JULIANA; COTRIM, MARYCEL; TANGO, MARIANA; DANIEL, LUIS; REALI, MARCOS; BUSTILLOS, OSCAR V.Resumo IPEN-doc 31811 Response surface methodology applied in the study on the influence of thermofixation on polyamide fabrics2025 - MELO, CAMILA G.; SILVA, LEONARDO G. de A.; ROSA, JORGE M.; COELHO, LUCIA H. G.; PEREIRA, MARIA C. C.The effects of thermofixation on physicochemical properties of polyamide 6.6 knit were studied applying response surface methodology (RSM). Despite presenting a higher value of shrinkage (3.33%), dyestuff and energy consumptions obtained by the applied mathematical model were, respectively, 0.227 g kg⁻¹ and 7.46 × 10⁵ J kg⁻¹ lower than the other process, demonstrating that RSM can be applied in the prediction of the ideal parameters in the polyamide 6.6 thermofixation process.Resumo IPEN-doc 31810 Evaluation of thermal stability of silicone rubber for brachytherapy applications2025 - TEODORO, LARA E. H.; TALACIMON, CRISTHIAN F.; BURIN, ANA L.; SILVA, ANA C. K. S.; RIGO, MARIA E. Z.; MEDEIROS, ILCA M. M. A.; SGRIGNOLI, SABRINA S.; RODRIGUES, PRISCILA S.; LEAL, DAVID A. U.; ROSA, GIOVANNA M.; MIRANDA, SILAS L. P.; TAVARES, PAULO V. S.; ZEITUNI, CARLOS A.; ROSTELATO, MARIA E. C. M.Resumo IPEN-doc 31809 Evaluation of the technical feasibility of commercial compatibilizers for multilayer film recycling2025 - ZILIANI, MARCOS R.; SILVA, LEONARDO G. de A.This study aims to evaluate major commercial compatibilizers for the recycling of multilayer films. Samples were sourced from post-consumer and post-industrial materials and processed using standard industrial equipment, including agglomerators, granulators (knife mills), and an extruder for compatibilizer incorporation. The materials were subsequently tested according to the criteria established by ASTM D648 (Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position) and ASTM D6110 (Standard Test Method for Determining the Charpy Impact Resistance of Notched Specimens of Plastics). Compatibilizing agents were added at the same concentration and using a consistent incorporation methodology to produce pellets, which were then injection-molded into test specimens for evaluation. The raw material was initially characterized using Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA). These techniques were used to assess the basic composition of the material under study, as well as its thermal decomposition behavior and inorganic residue content. Overall, the resulting specimens tested using HDT and Charpy impact tests showed significant changes in certain mechanical and thermal properties, while others remained virtually unchanged. The results indicate that specific compatibilizers demonstrated great potential for the recycling of multilayer films.Resumo IPEN-doc 31808 Effects of ionizing radiation on the molecular structure of polyethylene2025 - ZERBATO, TANIA M. S.; SILVA, LEONARDO G. de A.This study investigates the effects of gamma irradiation (60Co) at doses of 100 and 300 kGy on HDPE composites reinforced with 17 wt% glass fiber. The aim is to evaluate structural and thermal modifications induced by irradiation for potential use in high-demand industrial environments. Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), Heat Deflection Temperature (HDT), Vicat Softening Temperature, X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM) were employed to characterize changes in the material. Results showed slight decreases in melting temperature and minor changes in crystallinity. However, improvements were observed in HDT and Vicat values, indicating enhanced thermal resistance. SEM images revealed good fiber dispersion and fracture surface morphology, although signs of interfacial incompatibility were still present. These findings support the application of gamma-irradiated HDPE composites in conditions involving thermal and mechanical stress.Resumo IPEN-doc 31807 Development PVP hydrogels for drug delivery system via electron beam radiation2025 - ZEN, HELOISA A.; CABRAL, DANIELA F.; LUGAO, ADEMAR B.Resumo IPEN-doc 31806 Comparative analysis of heat of combustion in rubber compounds irradiated by electron beam2025 - PEREIRA, CICERA S.; GONCALVES, GABRIEL A. C.; AOKI, IDALINA V.; SILVA, LEONARDO G. de A.Resumo IPEN-doc 31805 Chemical resistance analysis of coextruded ABS/PMMA sheets subjected to ultraviolet (UV) light and ionizing electron beam (EB) radiation2025 - ARQUINTO, JULIANA; HARADA, JULIO; MARCONDES, CLAUDIO A.; SILVA, LEONARDO G. de A.This study aims to evaluate the chemical resistance of coextruded ABS/PMMA sheets subjected to ultraviolet (UV) radiation and electron beam (EB) irradiation. The samples were exposed to different UV doses (125, 200, and 300 WPI) and EB doses (50 and 100 kGy), and subsequently tested according to the criteria established by the ABNT NBR 15761 standard. Chemical agents were systematically applied to the surface of the samples, and the resulting damage was classified from Grade 4 (no visible change) to Grade 1 (severe degradation). EB-irradiated samples exhibited yellowing, a phenomenon not observed in UV-treated or non-irradiated specimens. Overall, both irradiated and non-irradiated samples showed similar performance in terms of chemical resistance, displaying vulnerability when exposed to acetone, ballpoint pen ink, and permanent markers. The results suggest that radiation-induced crosslinking via UV and EB did not significantly enhance the chemical resistance of PMMA.Resumo IPEN-doc 31804 Treatment of effluent from industrial, automotive, and refinish paints by electron beam irradiation2025 - CODELO, F.; DUARTE, C. L.; CALVO, W.Resumo IPEN-doc 31803 Traditional methods and gamma ionization technique for disinfection of cultural heritage objects2025 - VASQUEZ, P.; DELGADO, A.; BRITO, S.Resumo IPEN-doc 31802 Toxicity reduction in pharmaceutical compound mixtures using electron beam irradiation2025 - BORRELY, S.; FONSECA, N.; TOMINAGA, F.; SOMESSARI, S.Resumo IPEN-doc 31801 The use of irradiation for production of oligochitosan conjugated with oxide graphene2025 - OLIVEIRA, K. G. de; SAKATA, S.; VIEIRA, D. P.; LANDINI, L.; ARAUJO, S. G.; DUARTE, M.Resumo IPEN-doc 31800 Resumo IPEN-doc 31799 New tendencies and technologies on tomography applied to the petroleum industry2025 - AZEVEDO, R. C. de; SANCHEZ, A.; DONIZETTI, A.; SOMESSARI, S.Resumo IPEN-doc 31798 Morphological analysis of micro computed tomography (micro-CT) images of human tendon tissue sterilized by ionizing radiation2025 - MATHOR, M. B.; SANCHEZ DEL POZZO, A.; TUKOZAKI, K.; UBIRAJARA, L.Resumo IPEN-doc 31797 Irradiation processing impact on microbiological quality of Hermetia illucens larvae meal contaminated with different pathogens2025 - RAGOZZINO, P.; BENEDETTI, V. de F.; SOUZA, J. E. de; HAASIS, A. C.Resumo IPEN-doc 31796 Influence of ionizing radiation on hydrophilic polymers irradiated in solid state and aqueous solutions2025 - KADLUBOWSKI, S.; ULANSKI, P.; BALOGH, T.Resumo IPEN-doc 31795 Gamma irradiation synthesis of rGO-Ni/NiO nanocomposites with supercapacities properties2025 - SAKATA, S.; SILVA, D. V. da; OLIVEIRA, K.; DUARTE, M.; FARIA JR, R. N.Resumo IPEN-doc 31794 First Brazilian successful case of consolidation by ionizing radiation of a polychrome wood sculpture2025 - VASQUEZ, P.; OLIVEIRA, M.; PIRES, A.