Straw-wood composites bonded with various adhesive systems |
| |
Authors: | A H Grigoriou |
| |
Institution: | (1) School of Forestry and Natural Environment, Laboratory of Forest Products, Aristotelian University, 54006 Thessaloniki, Greece, GR |
| |
Abstract: | In order to study the feasibility of utilizing wheat straw as an alternative raw material for panels, experimental one-layer
particleboards were produced by mixing straw with industrial wood particles in various proportions (100:0, 75:25, 50:50, 25:75,
0:100). Three different adhesive systems were used for blending the raw materials: a UF resin (E2 grade), a PMDI resin and various UF:PMDI combinations (10:0, 8:2, 7:3, 6:4, 5:5). The evaluation of the mechanical and hygroscopic
properties of panels showed the following results: Partial replacement of wood particles from straw in panels bonded with
pure UF resin resulted in deterioration of all properties except linear swelling. Partial or whole substitution of wood by
straw in PMDI bonded panels, improved the bending strength and all hygroscopic properties of the panels but reduced the internal
bond (dry and wet) and screw holding strength, although to a much smaller degree compared to UF bonded panels. The properties
of panels bonded with various UF:PMDI combinations and comprising 50% wood and 50% straw were considerably improved by increasing
the PMDI content. In terms of the properties, pure straw panels or panels made of certain wood/straw mixtures, if bonded with
PMDI resin or the appropriate UF:PMDI combination, can be used for specific applications where high quality panels are required
according to the specifications of the related standards.
Received 11 February 1998 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|