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

Polymers

Jorge Martins¹  Fernão D. Magalhães¹  Sandra Monteiro¹  Luísa Carvalho¹ 

[1] LEPABE—Faculdade de Engenharia, Universidade do Porto, rua Dr. Roberto Frias, 4200-465 Porto, Portugal;

关键词: lightweight;    particleboards;    sour cassava starch;    foam;   

DOI  :  10.3390/polym8100354

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown