Utility characteristics of carbon composite board and the performance as building interior material

Abstract

We developed the carbon composite board (CMB) by adhering carbonized material powders with superfine natural cellulose and collagen fibers as binder. The CMB can adsorb volatile chemical compounds (VOCs) evolved from building materials. When the CMB is used practically for an adsorbent material as building interior materials, the environmental humidity in the indoor air changes depending on the seasons. It is necessary to study influence of the humidity on the adsorption property of VOCs. As result, the adsorbability of formaldehyde with the CMB did not change irrespective of change of the room humidity. Reduction of VOCs concentration in room model was also studied by adsorbing formaldehyde with the CMB. The concentration lower than 0.01 ppm was observed during one year of measurement time at the setting ratio of 1.2m2/m3. And we examined the effect of covering of low softening point glass on the fire-retardant property of the CMB. As result, the CMB are ranked as the semi-non-combustible material with the low softening point glass, where the adsorbability of VOCs was maintained. The CMB was put into the wall part in the rooms of the real practical house. The CMB can be expected to be applied for building interior materials of healthy housing.