NEW PARTICLEBOARDS BASED ON AGRICULTURAL BYPRODUCTS: PHYSICOCHEMICAL PROPERTIES WITH DIFFERENT BINDERS

Author(s): A. Mahieu, N. Leblanc
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference
on Bio-Based Building Materials
Editor(s): Sofiane AMZIANE, Mohammed SONEBI and Karine CHARLET
ISBN:
e-ISBN: 978-2-35158-192-6
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 633-639
Total Pages: 7
Language : English

Abstract: Because the timber market is more and more competitive, the particleboard manufacturers are
looked for new sources of vegetal raw material supply. In the same time, the use of healthier,
safer and more environmentally friendly materials become a priority in the building sector. In this
context, some agricultural byproducts as annual plant stems can be an interesting alternative. In
fact these resources are abundant, renewable and safe raw material. Moreover their porous
structure gives them interesting properties for building materials such as lightness and thermal
insulation capacity. In order to diversify raw material supply sources of a particleboard
manufacturer, two agricultural byproducts have been studied: flax shives and sunflower bark.
The particleboards are made at a laboratory scale by thermocompression of vegetal raw
particles at a target density of 500 kg.m3

. Two particle sizes have been compared in the panels
for each agroresource: 0.5-2 mm and 2-5mm. The vegetal particles are bonded by different
methods:
- without addition of any binder. In that case water is sprayed on the vegetal particles
before the forming process at 80% w/w. The lignocellulosic compounds contained in the
agro resources can act as binders.
- with a biosourced binder based on casein, incorporated at different rates with the vegetal
particles.
The observed mechanical behavior (by bending test and internal bond) for the particleboards
can be very different in function of the agro resource, the particle size and the binder used. The
different materials are also compared by their thermal properties and their behavior with water.
By using a biobased binder the mechanical properties of the particleboards are very better. For
all studied properties, panels made with flax shives present better properties than these made
with sunflower bark so flax shives seem more suitable for particleboard manufacturing. But with
optimization of the formulation and the process, both studied agro resources could be used in
particleboards for applications as furniture or door panel and efficient 100% biobased panels can
be obtained.

Online publication :2017
Publication type :full_text
Public price (Euros) : 0.00