Potential Release of Manufactured Nano Objects during Sanding of Nano-Coated Wood Surfaces

Increasing production and applications of manufactured nano objects (MNOs) have become a source for human exposure and therefore raise concerns and questions about the possible health effects. In this study, the potential release of nano objects, their agglomerates, and aggregates (NOAA) as a result of sanding of hardwood treated with MNOs...

Modelling piloted ignition of wood and plastics

To gain insight in the startup of an incinerator, this article deals with piloted ignition. A newly developed model is described to predict the piloted ignition times of wood, PMMA and PVC. The model is based on the lower flammability limit and the adiabatic flame temperature at this limit. The incoming radiative heat flux, sample thickness and...

Brittleheart as a critical feature for visual strength grading of tropical hardwood - Approach of detection

Brittleheart is a well-known phenomenon in many tropical wood species which reduces the strength properties considerably. According to national strength grading standards such as BS 5756 and NEN 5493, timber with brittleheart has to be rejected. In many cases, however, brittleheart is not visible on the outer surface and the cross section of...

Moisture transport in coated wood

Moisture accumulation inside wood causes favorable conditions for decay. Application of a coating alters the moisture sorption of wood and prevents accumulation of moisture. This paper presents the results of a nuclear magnetic resonance (NMR) study on the influence of a coating on the moisture absorption of wood. NMR allows to determine both...

An economic method to determine the strength class of wood species

As a result of the demand for wood from forests that are managed in an environmentally sustainable manner, many unknown wood species are introduced into the market at the moment. To classify a wood species into a strength class and determine the accompanying grading parameters for visual grading in practice, the strength characteristics are...