Evaluation of Biodegradation in Aqueous Medium of Poly(Hydroxybutyrate-Co-Hydroxyvalerate)/Carbon Nanotubes Films in Respirometric System

Autor(es)

Montagna, Larissa Stieven ^[1] ; Oyama, Isabela Cesar ^[1] ; Barbosa Camargo Lamparelli, Rita de Cassia ^[1] ; Silva, Ana Paula ^[1] ; do Amaral Montanheiro, Thais Larissa ^[1] ; Lemes, Ana Paula ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ Sao Paulo UNIFESP, Inst Sci & Technol, Technol Lab Polymers & Biopolymers TecPBio, Talim 330, BR-12231280 Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF RENEWABLE MATERIALS; v. 7, n. 2, p. 117-128, MAR 2019.
• Citações Web of Science: 0

Resumo

Biodegradable polymers have been increasingly used for scientific and commercial applications because they are similar to some conventional thermoplastics and exhibit the ability of self-degradation. Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) nanocomposites films with 1 and 2 wt% of carbon nanotubes (CNT) were prepared by solution mixing, followed by solvent evaporation. In this work, PHBV/CNT nanocomposites were submitted to biodegradation in an aqueous medium for 34 days through a respirometric system. Then, the PHBV films were analyzed by the CO2 production and mineralization as a response of a microbial attack, which was monitored by back titration during all the experiment. The films were also characterized by measuring the weight loss; crystallinity was evaluated by differential scanning calorimetry (DSC) and the surface morphology by scanning electron microscopy (SEM). By analyzing the weight loss of the films, it was observed that adding CNT increases the resistance to biodegradation process. The obtained values of CO2 production and mineralization of the samples, as well as the values of weight loss, showed that the biodegradation of PHBV/CNT nanocomposites was minor in comparison to neat PHBV. The addition of CNT in PHBV matrix influences the surface morphology, causing the presence of cavities and an increase of roughness. (AU)

• Processo FAPESP: 15/09565-6 - Avaliação da biodegradação de filmes de poli (3-hidroxibutirato-co-3-hidroxivalerato)/nanotubos de carbono em sistema respirométrico
• Beneficiário: Isabela César Oyama
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica