Guest Editors
Antonio José Felix de Carvalho, Professor, Engineering School of São Carlos, São Paulo State University, São Carlos, Brazil;
Antonio Aprigio da Silva Curvelo, Professor, Chemical Institute of São Carlos (IQSC) , University of São Paulo, São Carlos, Brazil;
Daniel Pasquini, Associate Professor, Chemistry Institute, Federal University of Uberlândia, Uberlândia,Brazil;
Summary
This special issue is intend to publish the best works presented in the
15th Brazilian Polymer Conference which is the most important congress
in the field in Brazil, receiving approximately 1000 lectures. More
information can be taken in the conference home page at: http://www.cbpol.com.br
Keywords
Polymers; Biopolymers; Natural polymers; Giodegradable ploymers; Monomers and composites
Published Papers
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Open Access
EDITORIAL
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Open Access
ARTICLE
Melt Extrusion of Environmentally Friendly Poly(L-lactic acid)/Sodium Metabisulfite Films for Antimicrobial Packaging Applications
Norma M. P. Machado, Gustavo C. Melo, Matheus F. Camargo, Giulianna G. Feijó, Bruna M. S. Putton, Clarice Steffens, Rogerio L. Cansian, Luiz A. Pessan, Francys K. V. Moreira
Journal of Renewable Materials, Vol.9, No.2, pp. 337-349, 2021, DOI:10.32604/jrm.2021.011081
（This article belongs to this Special Issue:
15th Brazilian Polymer Conference (15th CBPol))
Abstract Food packaging materials compounded with antimicrobial additives
can substantially diminish the incidence of foodborne diseases. Here, poly(L-lactic acid) (PLA) films containing sodium metabisulfite (NaM) were produced by
melt extrusion as an attempt to develop a new biodegradable material with antimicrobial properties for packaging. Life cycle assessment (LCA) simulations
revealed that the environmental footprints of the PLA film did not change upon
NaM addition, and that NaM is more eco-friendly than silver nanoparticles.
The PLA/NaM films with NaM content varying from 0.5 to 5.0 wt.% were characterized by differential scanning calorimetry (DSC), thermogravimetric analysis
(TGA), and optical and mechanical properties determinations.…
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Open Access
ARTICLE
Chitosan and Carboxymethylchitosan as High Turbidity Water Biocoagulants
Raimundo N. Lima Júnior, João L. I. O. Almeida, Jones de Andrade, Flávia O. M. S. Abreu
Journal of Renewable Materials, Vol.8, No.11, pp. 1489-1504, 2020, DOI:10.32604/jrm.2020.011629
（This article belongs to this Special Issue:
15th Brazilian Polymer Conference (15th CBPol))
Abstract Biocoagulants emerges as a promising technology in water treatment,
in order to exploit renewable and biodegradable materials. The present work aims
to study the coagulant action of chitosan and carboxymethylchitosan on water
with very high turbidity (above 300 NTU), contrasting the physicochemical
results with those obtained for aluminum sulphate. Carboxymethylchitosan was
produced by the Williamson’s ethers synthesis and characterized by potentiometric titration, FTIR and
1
H-NMR. The coagulant tests were performed using
synthetic water in a Jar-test equipment, through the induction of high and low
velocity gradients, followed by sedimentation. The results showed turbidity and
color removal efficiencies above 99%…
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Open Access
ARTICLE
Urethane Modified Hydrophobic Compact Wood Pulp Paper for Oil Spill Cleanup: A Preliminary Study
Gustavo de Souza, Ricardo K. Kramer, Antonio J. F. Carvalho
Journal of Renewable Materials, Vol.8, No.10, pp. 1257-1268, 2020, DOI:10.32604/jrm.2020.011906
（This article belongs to this Special Issue:
15th Brazilian Polymer Conference (15th CBPol))
Abstract Oil spills and oil/water wastewater are among the great concerns
regarding oil pollution. Existing technologies face many limitations and in some
cases are responsible for causing secondary pollution, therefore there is as seek for
environmental friendly solutions. Biomass, from which celluloses are highlighted,
are being employed for oil/water separation or oil absorbents membranes.
Usually, these membranes are obtained by freeze drying of CNF (cellulose nano-
fibrils) suspensions followed by chemical modification for hydrophobization,
which involves expensive process as chemical vapor deposition and expensive
reactants as sylanes, turning these processes hardly scalable. Here, we produced
a natural porous structure paper from…
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Open Access
ARTICLE
Utilization of Pineapple Crown Fiber and Recycled Polypropylene for Production of Sustainable Composites
Alexandra Augusta Reichert, Mariana Ribas de Sá, Gabriela Escobar Hochmuller da Silva, Cesar Augusto Gonçalves Beatrice, André Ricardo Fajardo, Amanda Dantas de Oliveira
Journal of Renewable Materials, Vol.8, No.10, pp. 1327-1341, 2020, DOI:10.32604/jrm.2020.010291
（This article belongs to this Special Issue:
15th Brazilian Polymer Conference (15th CBPol))
Abstract Nowadays, the production of consumer goods is based on the use of
non-renewable raw materials, which in recent years has been performing as a problem for the environment. Considering the large number of available biofibers in
nature, their use in the development of polymeric composites has inevitably
emerged, it is also necessary to take into account the countless discarded plastics
that still have the potential to be reused. In this work, fibers were extracted from
pineapple crown residues and utilized to compose sustainable composites using
recycled polypropylene from cups discarded in the trash as a matrix. However,
it is known…
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Open Access
ARTICLE
Study of the Superficial Modification of Sisal Fibres with Lignin, and Its Use As a Reinforcement Agent in Cementitious Composites
Plínio B. Mundim, Rondinele A. R. Ferreira, Leila A. C. Motta, Mariana A. Henrique, Daniel Pasquini
Journal of Renewable Materials, Vol.8, No.8, pp. 891-903, 2020, DOI:10.32604/jrm.2020.010655
（This article belongs to this Special Issue:
15th Brazilian Polymer Conference (15th CBPol))
Abstract The objective of this work was to evaluate different superficial treatments of sisal fibres employing lignin, and their use as a reinforcement agent
in cementitious composites. The treatments consisted of superficially impregnating sisal fibres (S) with organosolv lignin (LO), organosolv lignin and glutaraldehyde (LOG), Kraft lignin (LK) and Kraft lignin and glutaraldehyde (LKG). The
fibre modifications were verified by FTIR-ATR and SEM analyzes, and the presence of lignin on the surface of the fibres was evidenced, confirming the effectiveness of the treatments. The mechanical, thermal (by TGA) and water
absorption properties of the fibres before and after the modifications were…
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