Effect of carbon nanotubes on the biodegradability of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) nanocomposites

Autor(es)

da Silva, Ana Paula ^[1] ; do Amaral Montanheiro, Thais Larissa ^{[1, 2]} ; Montagna, Larissa Stieven ^[1] ; Andrade, Patricia Fernanda ^[3] ; Duran, Nelson ^{[3, 4, 5]} ; Lemes, Ana Paula ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Lab Polymer & Biopolymer Technol TecPBio, Talim 330, BR-12231280 Sao Jose Dos Campos, SP - Brazil

^[2] Inst Tecnol Aeronaut, Div Fundamental Sci, Lab Nanotechnol, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP - Brazil

^[3] Univ Estadual Campinas, Phys Chem Dept, Inst Quim, Biol Chem Lab, BR-13083970 Campinas, SP - Brazil

^[4] Univ Estadual Campinas, Inst Quim, NanoBioss Lab, BR-13083970 Campinas, SP - Brazil

^[5] Univ Fed ABC, Nanomed Ctr, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Polymer Science; v. 136, n. 40 OCT 20 2019.
• Citações Web of Science: 0

Resumo

In this work, the effect of carbon nanotubes (CNT) on the biodegradability of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) nanocomposites with 1 and 2% (w/w) of CNT has been evaluated by biodegradation assays in aqueous medium containing microorganisms extracted from garden soil. After biodegradation process, samples of PHBV and PHBV/CNT were compared regarding magnitude of degradation by visual macroscopic analysis, by measurement of percentage of weight loss and by scanning electron microscopy (SEM). The samples were further characterized regarding roughness and hydrophilicity by contact angle measurement. The final residue resultant from biodegradation of PHBV/CNT was analyzed in a FEI Inspect F50 field emission scanning electron microscope (FESEM) in order to verify the presence of CNT. Our results indicated that CNT did not compromise the biodegradability of PHBV matrix although the biodegradation rate has decreased with the increase of CNT content as shown by the weight loss measurements. SEM analysis of PHBV/CNT nanocomposites after biodegradation process showed increased amount of CNT exposed at the matrix surface suggesting the possibility of CNT recovering after the biodegradation. (c) 2019 Wiley Periodicals, Inc. (AU)

• Processo FAPESP: 13/27064-9 - Utilização de nanocristais de celulose na produção de nanocompósitos poliméricos para aplicações na área médica
• Beneficiário: Ana Paula Lemes
• Modalidade de apoio: Auxílio à Pesquisa - Regular