Influence of loading factors on VOCs emission from veneered plywood
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ORIGINAL ARTICLE
Influence of loading factors on VOCs emission from veneered plywood Tianyu Cao1 · Jun Shen1 · Qifan Wang1 · Huifang Li1 · Cong Xu1 Received: 13 March 2019 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Polyvinyl chloride overlaid veneered plywood (PVC-VP), melamine-impregnated paper overlaid veneered plywood (MIVP) and unfinished plywood (UF-P) were used as the experimental materials to explore the emission characteristics of volatile organic compounds (VOCs) and different VOC components from plywood under different loading factors. A 15L small chamber and gas chromatography-mass spectrometer were used as equipment. Under the conditions of a temperature of 23.5 °C ± 1 °C, relative humidity of 50% ± 5%, gas exchange rate of 1 h−1, and loading factors of 1m2m−3, 1.5m2m−3, 2m2m−3, 2.5m2m−3, VOCs were collected from plywood on days 1, 3, 7, 14, 21 and 28 for analysis. The results showed that the loading factors had a greater impact on VOCs released from veneered plywood in the early stage, but a smaller impact in the later stage. However, loading factors influenced the middle and late stages of VOCs release from UF-P. Aromatic hydrocarbons account for the largest proportion in VOC components in plywood, and their decreasing rate increased with the loading factors. Polyvinyl chloride (PVC) and melamine-impregnated paper contain olefins and esters, which were released rapidly before the balanced period. The relationship between VOCs released from plywood and loading factors was nonlinear and affected by the use of decorative materials. Therefore, the fitting curves of PVC-VP, MI-VP and UF-P had different functional relationships due to the different surface decorations.
1 Introduction Plywood is widely used in building, interior decoration and ship manufacturing because of its strength stability, and tolerance to temperature and moisture changes (Lv 2018; Zheng et al. 2015; Zhao 2015). However, the volatile organic compounds (VOCs) released from plywood during the process of use can endanger human health. VOCs can irritate eyes, skin, and mucosa (Lin 2014; Höllbacher et al. 2016; Costa et al. 2014), especially among the elderly and children. As a result, it can reduce work efficiency and cause economic losses (Park et al. 2013; Zhang 2015; Madureira et al. 2016). Therefore, the characteristics of VOCs released from wood-based panels and how to reduce them has become a hot research topic in many countries and regions. Many factors affect the emission of VOCs. The release of VOCs can be enhanced by increasing temperature and * Jun Shen [email protected] Tianyu Cao [email protected] 1
relative humidity (Liang et al. 2016; Liu et al. 2010). Under research conditions, VOC emission can also be affected by the size of the experimental chamber. For example, the release of VOCs can be accelerated by using a micro chamber to shorten the detection cycle (Liu et al. 2017; Wang et al. 2017; Du and Shen 2015). In addition, the release of VOCs can be affected by surface decoration ma
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