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

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Journal of Renewable Materials 2019年第2期7卷 117-128页

作者： Larissa Stieven Montagna isabela c.sar oyama Rita de cÁSSIA Barbosa camargo Lamparelli Ana Paula Silva THAIS Larissa do Amaral Montanheiro Ana Paula Lemes Federal University of São Paulo(UNIFESP) Institute of Science and TechnologyTechnology Laboratory of Polymers and Biopolymers(TecPBio)Talim330São Josédos CamposSP12231-280BrazilSão Josédos CamposSPBrazil

Biodegradable polymers have been increasingly used for scientific and commercial applications because they are similar to some conventional thermoplastics and exhibit the ability of ***(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 *** this work,PHBV/cNT nanocomposites were submitted to biodegradation in an aqueous medium for 34 days through a respirometric ***,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 *** 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 *** 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 *** addition of cNT in PHBV matrix influences the surface morphology,causing the presence of cavities and an increase of roughness.

关键词： Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) carbon nanotube nanocomposites biodegradation in aqueous medium

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