Evaluation of Biodegradation of PHB/PP-G-MA/Vermiculite Bionanocomposites

Priscylla Jordânia Pereira Mesquita; Rayson de Jesus Araújo; Daniela de Lourdes Anjos C. Simões Andrade; Laura Hecker Carvalho; Tatianny Soares Alves; Renata Barbosa

doi:10.4028/www.scientific.net/MSF.869.298

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HomeMaterials Science ForumMaterials Science Forum Vol. 869Evaluation of Biodegradation of...

Evaluation of Biodegradation of PHB/PP-G-MA/Vermiculite Bionanocomposites

Abstract:

In this study, the biodegradation process of PHB/PP-g-MA/clay bionanocomposites was evaluated. Films with compositions of 5% PP-g-MA and 3% clay (BIO5); and 2.5% PP-g-MA and 3% clay (BIO2,5) were prepared. The biodegradation test was performed according to ASTM G 160-03 for a period of 86 days. The evaluation of the degradation was carried out by optical microscopy (OM), weight loss, FTIR and XRD. The bionanocomposites showed change of color and appearance of cracks. As the mass loss, the BIO2,5 system presented loss of 22.5%, and the BIO5, of 25.9%, for 86 days of exposure in simulated soil. It was also observed by FTIR, a marked reduction in the intensity of the corresponding band to the C = O groups, indicating that microbial attack promoted cleavage of bonds of the ester group. By XRD, there was a decrease in the intensity of the peaks and enlargements thereof with increasing exposure time, demonstrating the biodegradation behavior of bionanocomposites.