Comprehensive insight into surfactant modified-PBAT physicochemical and biodegradability properties

Autor(es)

Camani, Paulo H. ^[1] ; Souza, Alana G. ^[1] ; Barbosa, Rennan F. S. ^[1] ; Zanini, Noelle C. ^[2] ; Mulinari, Daniella R. ^[2] ; Rosa, Derval S. ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ ABC UFABC, Ctr Engn Modeling & Appl Social Sci CECS, Santo Andre, SP - Brazil

^[2] State Univ Rio de Janeiro UERJ, Dept Mechan & Energy, BR-27537000 Resende - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Chemosphere; v. 269, APR 2021.
• Citações Web of Science: 0

Resumo

This work aimed to prepare surfactant modified-PBAT (poly(butylene adipate-co-terephthalate)) sheets with superior properties to increase the PBAT applicability and be a possible solution for plastic disposal environmental problems. Three different surfactant contents (0, 1, 5, and 10 wt%) were investigated, and their effects on PBAT chemical structure, mechanical and morphological properties, wettability, and water absorption were investigated. Modified-PBAT samples showed high hydrogen bond coefficients (0.57) than the pristine PBAT (0.54), indicating an excellent electrostatic interaction between both components and the formation of a rigid hydrogen-bonded network, as confirmed by mechanical tests, where the elastic modulus values for PBAT and PBAT+10% surfactant were 44 and 60 MPa. SEM images and roughness measurements showed changes in PBAT morphology after surfactant addition, improving the roughness and wettability by the voids and polar groups presence, altering the water absorption (WA) behavior. The higher water affinity resulted in high water absorption for PBAT-10%S (17%) compared to the pristine PBAT (2%), which improves hydrolysis tendency, which is the initial step to biodegradation. Biodegradation results indicated that the roughness and WA behavior influenced the biodegradation rate, facilitating hydrolysis and microbial attack, and accelerating modified samples weight loss. Our results suggested developing a material with superior mechanical properties, mainly for PBAT-10%S, that can be applied in several applications, such as packaging and furniture. After discharge, it is not an environmental problem, being a biodegradable material with a green character. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 18/11277-7 - Filmes de PBAT com nanoestruturas de celulose tratadas com óleos essenciais encapsulados para embalagens ativas
• Beneficiário: Derval dos Santos Rosa
• Modalidade de apoio: Auxílio à Pesquisa - Regular