Yin Wenhang, Zhang Yueyun, Li Churan, Wu Boxiao, Yang Zhaojin, Huang Heming, Luo Bangrui, Du Guanben, Zhao Ping, Yang Xiaoqin
Key Laboratory of National Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming 650224, China.
Kunming Feilin Wood-Based Panel Group Co., Ltd., Kunming 650033, China.
Molecules. 2025 Apr 28;30(9):1949. doi: 10.3390/molecules30091949.
wood particleboard (EPB), commonly used in indoor decoration, releases volatile organic compounds (VOCs) that can adversely affect indoor air quality and human health. This study systematically examined the VOC emission characteristics of EPB using headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography mass spectrometry (GC-MS). A total of 65 VOCs were identified, with medium-volatility organic compounds (MVOCs) accounting for 28 compounds, low-volatility organic compounds (LVOCs) for 26, and high-volatility organic compounds (HVOCs) for 11. Terpenoids dominated the VOCs, comprising 78.46%, followed by aldehydes (10.77%) and alkanes (7.69%). Key odorant compounds (KOCs) were identified using the relative odor activity value (ROAV), with hexanal (ROAV = 100) and o-cymene (ROAV = 76.90) emerging as the most significant contributors to the overall odor profile. Thermal post-treatment at temperatures of 50-60 °C for durations of 6-12 h was found to be an effective method for reducing the residual VOCs and KOCs in the EPB, leading to a marked decrease in the peak areas of key odorants. The findings suggest several strategies for minimizing VOC emissions and eliminating residual odor, including reducing the use of miscellaneous wood materials, controlling the production of o-cymene, and employing thermal post-treatment at moderate temperatures. These measures provide a promising approach to reducing VOC and odor emissions from EPB and similar composite wood products, thereby enhancing their suitability for indoor applications. This study innovatively establishes an evaluation system for VOC emission characteristics in wood-based panels based on the ROAV. It elucidates the contribution mechanisms of key odor-active substances (e.g., hexanal and pentanal) and presents a thermal post-treatment process for source control, achieving simultaneous VOCs and odor elimination. A ROAV-guided hierarchical management strategy is proposed, providing scientific guidelines for the industrial production of high-quality particleboards with ultralow emissions (TVOC < 50 μg/m) and minimal odor intensity (OI < Grade 3).
木质刨花板（EPB）常用于室内装修，会释放挥发性有机化合物（VOCs），这些化合物会对室内空气质量和人体健康产生不利影响。本研究采用顶空固相微萃取（HS-SPME）结合气相色谱-质谱联用（GC-MS）系统地研究了EPB的VOCs排放特征。共鉴定出65种VOCs，其中中等挥发性有机化合物（MVOCs）有28种，低挥发性有机化合物（LVOCs）有26种，高挥发性有机化合物（HVOCs）有11种。萜类化合物在VOCs中占主导地位，占78.46%，其次是醛类（10.77%）和烷烃（7.69%）。使用相对气味活性值（ROAV）鉴定关键气味化合物（KOCs），己醛（ROAV = 100）和邻异丙基甲苯（ROAV = 76.90）是总体气味特征的最重要贡献者。发现在50-60°C温度下进行6-12小时的热后处理是减少EPB中残留VOCs和KOCs的有效方法，导致关键气味物质的峰面积显著降低。研究结果提出了几种减少VOC排放和消除残留气味的策略，包括减少杂木材料的使用、控制邻异丙基甲苯的产生以及在适中温度下进行热后处理。这些措施为减少EPB和类似复合木制品的VOC和气味排放提供了一种有前景的方法，从而提高其在室内应用中的适用性。本研究创新性地建立了基于ROAV的人造板VOC排放特征评价体系。阐明了关键气味活性物质（如己醛和戊醛）的贡献机制，并提出了一种用于源头控制的热后处理工艺，实现了VOCs和气味的同时消除。提出了一种基于ROAV的分级管理策略，为工业生产超低排放（TVOC < 50 μg/m）和最低气味强度（OI < 3级）的优质刨花板提供了科学指导。
