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Polymers 2016, 8(10), 354; doi:10.3390/polym8100354

Low Density Wood-Based Particleboards Bonded with Foamable Sour Cassava Starch: Preliminary Studies

1
LEPABE—Faculdade de Engenharia, Universidade do Porto, rua Dr. Roberto Frias, 4200-465 Porto, Portugal
2
DEMAD—Department of Wood Engineering, Polytechnic Institute of Viseu, Campus Politécnico de Repeses, 3504-510 Viseu, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: Antonio Pizzi
Received: 29 June 2016 / Revised: 23 September 2016 / Accepted: 29 September 2016 / Published: 8 October 2016
(This article belongs to the Special Issue Renewable Polymeric Adhesives)
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Abstract

This work investigates the feasibility of producing low density particleboards using an adhesive system based on sour cassava starch, taking advantage of its adhesive and self-expansion properties. Relevant properties of the produced particleboards were evaluated according to European Standards including: density, internal bond, moisture content and thickness swelling. Low density particleboards were produced with densities between 207 kg/m3 and 407 kg/m3. The best performance corresponded to particleboard with a density of 318 kg/m3, an internal bond strength of 0.67 N/mm2, and a thickness swelling of 8.7%. These values meet the standard requirements of general purpose lightweight boards for use in dry conditions. Heat post-treatment (24 h at 80 °C) led to lower internal bond strength, due to retrogradation (recrystallization of amylose and amylopectin chains upon cooling) causing higher rigidity of the starch binder. However, it showed to have a significant effect on decreasing the thickness swelling. View Full-Text
Keywords: lightweight; particleboards; sour cassava starch; foam lightweight; particleboards; sour cassava starch; foam
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Monteiro, S.; Martins, J.; Magalhães, F.D.; Carvalho, L. Low Density Wood-Based Particleboards Bonded with Foamable Sour Cassava Starch: Preliminary Studies. Polymers 2016, 8, 354.

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