SciELO - Scientific Electronic Library Online

 
vol.13 issue2Influences of the operating variables of acetosolv pulping on pulp properties of oil palm frond fibresRadial and longitudinal basic density variation in 16 years old Eucalyptus regnans trees author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Maderas. Ciencia y tecnología

On-line version ISSN 0718-221X

Abstract

GAO, Wei; CAO, Jinzhen  and  KAMDEM, D. Pascal. Effect and mechanism of nanosize copper oxide on some physical and mechanical properties of flakeboards. Maderas, Cienc. tecnol. [online]. 2011, vol.13, n.2, pp.203-210. ISSN 0718-221X.  http://dx.doi.org/10.4067/S0718-221X2011000200008.

The effects of nanosize copper oxide and basic copper carbonate on the physical and mechanical properties of flakeboards were investigated according to ASTM Standard D-1037, and the curing process of phenol formaldehyde (PF) resin containing copper compounds was further investigated using dynamic differential scanning calorimetry (DSC). The results showed that nanosize copper oxide had no or slightly beneficial effects on the mechanical properties and dimensional stability of the flakeboards. While basic copper carbonate increased thickness swelling and water absorption to some extent, the difference was not statistically significant. The DSC results indicated that the comparable activation energy and reaction enthalpy, obtained from nanosize copper oxide treated samples, contributed to the higher degree of conversion of PF resin and undiminished bonding strength of flakeboards, which is probably related to the acceleration of the addition reactions taking place among small molecules in PF resin and the enhancement of heat transfer of composite mat caused by nanosize copper oxide.

Keywords : nanosize copper oxide; basic copper carbonate; flakeboard; physical and mechanical properties; differential scanning calorimetry.

        · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License