Wood is increasingly difficult to obtain due the use of excess wood. Many efforts were made replace wood, one which was composite material. This study aims determine most optimal bending strength with influence variations in volume fractions and fiber orientation hybrid composites luffa fibers hyacinth fibers. In making using hand lay-up method alaklization treatment on gambas 5% NaOH varied fr...

Microwave processing of wood involves many complicated physical phenomena. The process includes absorption of the electromagnetic energy, transport of the generated heat, shape and dimension changes of the wood, phase changes in water, water transport through the wood material, etc. In order to optimize and control this process, the understanding of the various phenomena involved is needed. Thi...

Ab&act The structural performance of medium density fiberboard (MDF) is attributable to three primary variables which are: physical and mechanical properties of individual wood fibers; fiber-to-fiber stress transfer; and fiber orientation. These origins of fiber properties and stress transfer can be traced to the fiber generation method wherein fiber orientation is associated with mat formation...

Qualitative and quantitative data are presented for woods of 37 species representing 11 genera; most species included represent a maximal degree of woodiness for the family, and herbaceous groups are mostly omitted. Growth rings are absent or nearly so. Vessel elements have simple perforation plates (except for Kohleria elegans) and alternate circular or oval pits of various sizes on vessel-ves...

the target of this study was to investigate the possibility of mdf productionfrom eucalyptus camaldulensis wood. mdf fibers were produced applying threelevels of steaming time. laboratory mdf boards were produced using thegenerated fibers and different pressing temperature and time. physical andmechanical properties of mdf panels were measured using relevant eu testmethods and were statisticall...

Several different enzymatic, chemical and mechanical methods have been developed for the isolation of lignin from wood and pulp. However, due to the heterogeneous nature of wood and pulp fibers and the heterogeneity that exists between individual fibers, no method is currently available for the quantitative isolation of native or residual lignin without the risk of structural changes during the...

Wood polymer composites (WPC) are sensitive to moisture because of the hydrophilic nature wood fibers. The main objective this study was improve dimensional stability WPCs by coating. Polypropylene and polylactic acid were reinforced three pulp fibers (kraft, thermomechanical (TMP), chemothermomechanical (CTMP)) at fiber contents (50, 60, 70% w/w). resulting coated using two commercial coatings...

Green composites from polypropylene and lignin-based natural material were manufactured using a melt extrusion process. The lignin-based material used was the so called "liquid wood". The PP/"Liquid Wood" blends were extruded with "liquid wood" content varying from 20 wt % to 80 wt %. The blends were thoroughly characterized by flexural, impact, and dynamic mechanical testing. The addition of t...