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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Polylactic acid/Lignocellulosic residue composites compatibilized through a starch coating

Full text
Author(s):
Rocha, Daniel Belchior [1] ; de Souza, Alana Gabrieli [1] ; Szostak, Marek [2] ; Rosa, Derval dos Santos [1]
Total Authors: 4
Affiliation:
[1] Fed Univ ABC, Lab Polimeros Ambientalmente Amigaveis, Ave Estados 5001, Santo Andre 09210580, SP - Brazil
[2] Poznan Univ Tech, Inst Mat Technol, Polymer Proc Div, Poznan - Poland
Total Affiliations: 2
Document type: Journal article
Source: Polymer Composites; v. 41, n. 8 MAY 2020.
Web of Science Citations: 0
Abstract

The use of natural fiber residues as reinforcement in biodegradable composites has been performed; however, the incompatible interface limits the applications. In this work, the use of starch coating as a natural coupling agent was studied in three different natural residues: sugarcane bagasse, macaranduba, and pinus wastes, aiming biodegradable composites. The coating in bagasse showed low efficiency, with low thickness and failures, due to residue intrinsic higher surface area; while the wood residues showed shorter fibers with uniform starch deposition. These results affected the compatibility between filler and matrix; while the bagasse composite showed voids and decrease in the mechanical properties; however, the macaranduba and pinus showed an increase in the stiffness and strength. All the coated fiber composites showed stable thermal properties and an increase in the crystallinity in the coated samples. The addition of the natural filler resulted in a high water absorption with coated samples absorbing six times more water than neat PLA and without stabilization in a short time. This characteristic may favor the initial abiotic hydrolysis in the biodegradation, showing that the material could be an option to produce short-life packaging in dry environments. (AU)

FAPESP's process: 18/21831-1 - Evaluation of different processing methods of natural fiber composites using starch as a natural coupling agent
Grantee:Derval dos Santos Rosa
Support Opportunities: Research Grants - Visiting Researcher Grant - International
FAPESP's process: 18/25239-0 - Evaluation of dispersion of modified cellulose nanostructures in bionanocomposites
Grantee:Derval dos Santos Rosa
Support Opportunities: Scholarships abroad - Research
FAPESP's process: 18/11277-7 - PBAT films with cellulose nanostructures treated with essential oils encapsulated for active packaging
Grantee:Derval dos Santos Rosa
Support Opportunities: Regular Research Grants