Abstract:

【Objective】To reduce the testing cost and enhance the research reliability and efficiency, this paper introduced a new rapid detection method for testing VOC released from three-layer parquet. The M-CTE thermal extractor was explored to analyze the effect of environmental factors about release characteristics of VOC on the stable phase and to find the correlation between the rapid detection and 1 m³ traditional climate box method. 【Method】This paper established a single factor experiment matched to the appropriate environmental conditions and to analyze the release rule of VOC under different temperature, relative humidity, ratio of air exchange rate and loading factor by using rapid sampling device and GC-MS conjunctively. On the one hand, the main components and release characteristics of the VOC released from three-layer parquet were probed. On the other hand, the influence of various environmental factors on VOC under equilibrium condition was analyzed. According to the release rule, the best condition was determined by rapid detection method. Meanwhile, the 1m³ traditional climate box method was used to characterize the concentration released during the process of natural attenuation. The data measured from the two kind of method was compared and the correlation was established. 【Result】Results showed that: as the main components of VOC emission released from three-layer parquet, aromatics and esters had obvious changing trend in concentration. Besides some parts of alkanes, alkenes, aldehydes and ketones, small amounts of ethers, alcohols and acids were also found. Furthermore, the TVOC equilibrium concentration increased with the raise of temperature and relative humidity, but the higher the temperature, the less impact of humidity on it. Ratio of air exchange rate and loading factor had remarkable effect on TVOC emissions under high temperature and high moisture condition, the smaller the ratio of air exchange rate and loading factor, the larger the TVOC concentration were found from three-layer parquet in the stage of stable emission. 【Conclusion】By comparing the data of 1 m³ traditional climate box method, we found the trend of VOC release was basically consistent and they had the same compounds. With the time going, the release quantity of TVOC gradually fell to a stable trend. The main components of VOC, esters and aromatic hydrocarbons, were derived from the organic solvent on surface working. Thus, environment friendly coating was recommended. High temperature and high moisture had a significant impact on release quantity of VOC from three-layer parquet by rapid detection method due to the synergy effect of temperature and humidity. The release quantity of VOC was apparently affected by the ratio of air exchange rate and loading factor under high temperature and moisture. The release rate of VOC tested by rapid detection method was apparently fast and reliable. Therefore, the new method could be used for rapid detection of VOC released from wood-based panels to deal with specific problems in the manufacturing process and improve the quality of products.

Key words: three-layer parquet, rapid detection, volatile organic compounds(VOC), small chamber method