Effect of Carbonization Temperature on Hygric Performance of Carbonized Fiberboards

Abstract

Increases of public attention on healthy environment lead to the regulation of indoor air quality such as Clean Healthy House Construction Standard. This standard covers emission of total volatile organic compounds (TVOCs) (e.g., formaldehyde, benzene, and toluene), ventilation, and use of environmentally-friendly products or functional products. Moisture absorption and desorption abilities are a recommended functionality for improving indoor air quality. In this study, moisture absorption and desorption capacities of carbonized board from wood-based panels and other materials were determined by using UNT-HEAT-01 according to ISO 24358:2008. Pine had higher moisture absorption and desorption capacities (49.0 g/m 2 and 35.3 g/m 2 , respectively) than hinoki cypress, cement board, gypsum board, oriented strand board, and medium density fiberboard (MDF). The moisture absorption and desorption capacities differed considerably according to the wood species. After carbonization process at 400℃, the absorption and desorption ability of MDF increased to 38% and 60%, respectively. However, moisture absorption and desorption capacities decreased with increasing carbonization temperature, but they were still higher than original MDF.) Therefore, it is suggested that carbonization below 600℃ can improve moisture absorption/desorption capacities.

Synthesis of TiO2 via modified sol-gel method and its use in carbonized medium-density fiberboard for toluene decomposition

“…In 2009, a crack-and twist-free carbonized board was developed by using medium-density fiberboard (MDF), plywood, and wood panels (Park et al 2009). The physicochemical properties and functionality of carbonized MDF (c-MDF) have been investigated (Zhou et al 2013;Lee et al 2014;Lee et al 2017a,b). The c-MDF can easily remove formaldehyde (a major volatile compound contributing to sick house syndrome) and shows some ability to remove other aromatic volatile organic compounds (VOCs), such as toluene and xylene, from indoor atmospheres (Park et al 2009).…”

Effect of Loess Treatment and Carbonization on the Hygric Performance of Medium-density Fiberboard

“…The 10 times homogenized loess-treated c-MDF showed lower moisture absorbing and desorbing properties than the other amounts of repeated homogenization, which meant that the loess particle size was reduced to cover all micro and macro pores of c-MDF. Lee et al (2014) explained that not only chemical reactions of materials including wood, wood-based board, and c-MDF influence absorption and desorption, but also physical reactions between materials, which can be influenced by moisture. Furthermore, moisture buffering in porous surfaces was found to have a large influence on the humidity distribution of the dwelling.…”

“…The carbonization process does not require any chemical additions, and the cellular anatomical features of the wood are retained in the new carbon material (Treusch et al 2004). In the authors' previous study, carbonized wood-based materials were introduced for use as environmentally friendly indoor construction materials, because they had excellent flame retardant qualities, sound absorption, electrical resistance, and hygric performance (Kwon et al 2013;Lee et al 2014;Park et al 2014). In particular, Lee et al (2014) reported that the moisture absorption and desorption capacity of medium-density fiberboard (MDF) were significantly improved by carbonization, and that the highest value was obtained at 600 °C.…”