2018 Volume 30 Issue 3 Pages 52-63
In this study, composite boards containing rice husk activated carbon were prepared by hot pressing method by using a heat-fusion binder and measured for properties from the point of applying for building materials. We used coconuts shell activated carbon for comparison and considered the effect of particle size. It was found that the boards can be fabricated with using polyvinyl butyral (PVB) as a binder. Compared with the conventional method, the present method can be dominant in manufacturing energy and production cost. The results of physical property measurements showed that the composite boards with coconuts shell activated carbon have higher breaking stress than those with rice husk activated carbon because the packing density of carbon particles in the former ones are higher than the latter ones. It was also shown that these boards have several distinctive properties, such as sound absorption, volatile organic compounds (VOC) adsorption and moisture absorption-desorption. In particular, VOC adsorption speed of rice husk activated carbon board is faster than that of coconuts shell activated carbon board, because of the former having larger specific surface area of meso/macro pores than that of the latter. Moreover, it was found the behavior of VOC adsorption depends on the surface area and micropores distribution as well as the functional groups on the carbon particles.
From the above, it was found that the composite boards with rice husk activated carbon are able to be fabricated by thermal fusing molding and the boards are expected to be applied to building materials as they have several distinctive properties.
