MADERAS: Ciencia y Tecnología
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Changes in the chemical structure and decay resistance of heat-treated narrow-leaved ash wood

Published in Maderas Ciencia y tecnología

We analyzed the effects of heat treatment on the chemical structure of wood from narrow-leafed Ash (Fraxinus angustifolia), a fast-growing and economically valuable species. We also analyzed the effects of heat treatment on the wood's resistance to four decay fungi. Narrow-leafed Ash wood samples were heated with saturated steam to 140, 180, 200, a...

Aplicación de celulosa nanofibrilada, en masa y superficie, a la pulpa mecánica de muela de piedra: una sólida alternati...

Published in Maderas Ciencia y tecnología

Se ha estudiado el efecto de distintos dosajes en masa de nanofibras de celulosa (CNF), comprendidas entre un 0 y un 6%, sobre las propiedades físico-mecánicas del papel obtenido a partir de las fibras de pasta mecánica de muela de piedra (SGW). Los resultados obtenidos se han comparado con el procedimiento convencional de refinado a distintos grad...

Characterization of the rhizophora particleboard as a tissue-equivalent phantom material bonded with bio-based adhesive

Published in Maderas Ciencia y tecnología

In this study, some characteristics of Rhizophora spp. particleboards bonded with Serishoom (traditional animal–based adhesive) as a phantom material was investigated. The Rhizophora spp. particleboards were fabricated in two Serishoom adhesive treatment levels (6% and 12%) with three Rhizophora spp. particle sizes (≤ 149 µm, 149 µm – 500 µm, and 5...

Ability of plant-derived oils to inhibit dampwood termite (Zootermopsis augusticollis) activity

Rushda Fatima Jeffrey Morrell

Published in Maderas Ciencia y tecnología

The potential effects of plant derived oils on survival of dampwood termite (Zootermopsis augusticollis) workers was explored on western white pine sapwood blocks. All of the oils rapidly affected protozoa in the hindgut of termite workers and protozoa loss was closely followed by worker mortality. The effects were most rapid with wood treated with...

Study on the effects of wood flour geometry on physical and mechanical properties of wood-plastic composites

Azar Khonsari Hamid Taghiyari Ali Karimi Mehdi Tajvidi

Published in Maderas Ciencia y tecnología

The present study is focused on the effects of the shape and size of Fagus orientalis wood flour on physical and mechanical properties of HDPE based wood plastic composites (WPC). Variables included two mesh sizes (20 and 60), as well as five different contents of ground shavings (0, 25, 50, 75, and 100%) mixed with sawdust; totally 10 treatments. ...

Efecto del raleo sobre las propiedades anatómicas de la madera de Pinus taeda

Rosa Winck Hugo Fassola Cristina María

Published in Maderas Ciencia y tecnología

El raleo tiene implicancias económicas y técnicas para producción forestal y para la actividad industrial. El objetivo del estudio fue determinar la influencia de la intensidad de raleo sobre las propiedades anatómicas de la madera. Se trabajó con muestras tomadas a 1,30 m de altura, de 24 árboles proveniente de un ensayo de raleo en Pinus taeda de...

The effect of nano-zinc oxide on particleboard decay resistance

Pouya Marzbani Younes Afrouzi Asghar Omidvar

Published in Maderas Ciencia y tecnología

The aim of this study was to investigate the decay resistance of particleboards treated with nano-zinc oxide against the white-rot fungus Trametes versicolor and the brown-rot species Coniophora puteana. The nanomaterial was used for manufacturing particleboards at 5, 10 and 15% wt based on the glue dry weight. The soil block decay test was perform...

Mechanical properties of chemically modified portuguese pinewood

Published in Maderas Ciencia y tecnología

To turn wood into a construction material with enhanced properties, many methods of chemical modification have been developed in the last few decades. In this work, mechanical properties of pine wood were chemically modified, compared and evaluated. Maritime pine wood (Pinus pinaster) was modified with four chemical processes: 1,3-dimethylol-4,5-di...

Physico-mechanical properties of plywood bonded by nano cupric oxide (CuO) modified pf resins against subterranean termi...

Wei Gao Guanben Du

Published in Maderas Ciencia y tecnología

Nano CuO and alkane surfactant modified phenol Formaldehyde (PF) resins were applied to manufacture plywood, and physical and mechanical properties, such as shear strength, tensile property, modulus of rupture (MOR), modulus of elasticity (MOE), as well as termite resistance were evaluated. The result showed that the combination of nano CuO and alk...

Phytosanitation of mountain pine beetle infected lodgepole pine using dielectric fields at radio frequencies

Published in Maderas Ciencia y tecnología

As an environmentally friendly alternative to chemical treatment, this research aimed to establish whether dielectric heating at high frequency of infested lodgepole pine (Pinus contorta) boards and logs, obtained from the mountain pine beetle devastated forests of British Columbia, can result in wood free of living fungi, nematodes and insects. Th...

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