CAMILA ALMEIDA AMORIM
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Artigo IPEN-doc 24948 Characterization of biodegradable mulch black films incorporated with organics fertilizers and rice husk ash2017 - HARADA, JULIO; AMORIM, CAMILA A.; BRAGA, PAULA L.; MACHADO, LUCI D.B.; OLIVEIRA, RENE R.; CABRAL NETO, ABNER; MACEDO, JOSE R.N.; SILVA, LEONARDO G.A.; ROSA, DERVAL S.The effects of organic fertilizer, rice husk ash, both from renewable resources, were evaluated. Both of them were incorporated in biodegradable black mulch films. Morphological, mechanical and thermal properties based on PBAT/PLA composites with 2 % wt. of carbon black were investigated. In addition, the formulations were prepared with 1 % wt. to 2 % wt. rice husk ash and 2 % wt. to 4 % wt. % organic fertilizer The samples were produced by melt extrusion process, using a twin screw extruder machine and blown film extrusion process. As can be seen the properties of biodegradable mulch film samples were investigated by tensile tests, XRD, FTIR, TG, MEV analyses. Correlation between properties were discussed. According to the results it is possible to apply this composite as film for agricultural protection.Artigo IPEN-doc 22628 Mechanical and thermal comparison analyses in polyamide 6 compounds with talc mineral filler and Aerosil®2016 - AMORIM, CAMILA A.; SILVA, LEONARDO G.A.In order to have sustainable development, it is very desirable that the possibilities of obtaining ecologically acceptable raw materials that increase dimensional properties and reduce cost in the industrial sector are explored. In this sense, the possibility of replacing mineral talc powder with the colloidal silicon dioxide (AEROSIL® ) as a mineral filler in polyamide 6 (PA 6) compounds was tested. AEROSIL® is an amorphous substance with low density that satisfies consumer demands. In this study both fillers – talc and colloidal silicon dioxide – used with PA 6 were explored. Moreover, their density and properties in terms of thermogravimetric analysis (TG) were evaluated. Additional mechanical tests such as tensile strength, elongation at break and impact resistance were also carried out. The tests concluded both compounds (PA 6 with colloidal silicon dioxide and PA 6 with talc) demonstrated the same behavior. The results have demonstrated that colloidal silicon dioxide may be viable alternative filler for replacing talc as mineral filler in polyamide 6 compounds. Thus, this work contributes to minimizing environmental problems by enabling the use of colloidal silicon dioxide in the productive process.Artigo IPEN-doc 21185 Comparacao das propriedades de PA 6 e PA 6.6 reforçadas com talco e com cinza de casca de arroz2015 - AMORIM, CAMILA A.; MOURA, JESSICA L.; CORREA, PEDRO H.Z.; BUSS, CLEITON J.W.; ROSSINI, EDVALDO L.; SILVA, LEONARDO G.A.