light weight wood base sandwich panels have some special properties and their most important properties is high mechanical strength with its light weight. these panels can replace instead of traditional structural systems in iran. the purpose of this paper is investigating the mechanical properties of light weight wood base sandwich panels that have made from sunflower stalk wastes and particle...

9.1 General..................................................................................................................................216 9.2 Wood Adhesive Uses............................................................................................................217 9.3 Terminology..........................................................................................................

In this work, carbon xerogels (CXGs) doped with nitrogen or sulfur have been investigated as DSSC counter electrodes. CXGs prepared by a sol–gel method from resorcinol and formaldehyde subsequent carbonization. Nitrogen doping has carried out introducing melamine into the synthesis process along formaldehyde, while incorporated direct reaction of material elemental sulfur. The electrodes for DS...

In this presented work, we describe the development and characterization of a new, environmentally friendly adhesive derived from cornstarch and tannins. The production of wood composites mainly relies on the petrochemical-based and formaldehyde-based adhesives such as urea formaldehyde (UF), phenol formaldehyde (PF) and melamine urea formaldehyde (MUF), which can generate under certain conditi...

this paper reports on formaldehyde exposure and its health hazards in a melamine manufacturing industry. the mean of workers' exposure was measured according to 3500 njosh and was found to be 1.44±o.2l, and 2. 17±o.24 ppm in morning and evening shifts, respectively. for stationary ones it was 1.37±o.20, and 2.06±o.25ppm, respectively. the results show that formaldehyde concentration at the...

Microcapsules with fragrance in the core were used to produce a scented textile. The wall of microcapsules was based on melamine-formaldehyde polymer while an essential oil core. They applied cotton fabric using screen printing two ways: over entire surface and by pattern. properties differently printed samples analyzed. evaluation performed, mechanical studied, antibacterial activity against S...