材料 VOC/SVOC 散发解析模型及参数测定方法研究

The impact of emitted volatile organic compounds (VOC) and semi-volatile organic compounds (SVOC) from indoor building materials and furniture cannot be ignored. This study firstly establishes a unified analytical model to describe the emissions of VOC/SVOC from materials, which is helpful for the achievement of general characterization of source/sink behaviors and the integrated control of pollutants. A hybrid optimization method is used to measure the three key parameters in the model, including the initial emittable concentration (C₀), diffusion coefficient (D_m), material/air partition coefficient (K_m), and surface/air partition coefficient (K_s). Data of VOC emissions from a solid wood furniture and SVOC emissions a flame retardant in literature are used to verify the validity of the model and method. Moreover, the impact of long-term SVOC emission on the gas-phase concentration along the material surface (y₀) at different temperatures is analyzed. Results indicate that, with the increase of temperature or emission time, it is more appropriate to use C₀ as a key emission parameter, rather than the widely used y₀ in prior studies.