Статья

Microwave-Assisted Heat Treatment for Sustainable Wood Modification: Enhanced Dimensional Stability and Selective Control of Volatile Organic Compound Emissions

Yuhan LiState Key Laboratory of Efficient Production of Forest Resources, Beijing Key Laboratory of Wood Science and Engineering, MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, No. 35, Qinghua East Road, Haidian District, Beijing 100083, ChinaJingjing GaoGuangxi Forestry Research Institute, Guangxi Laboratory of ForestryBo WangState Key Laboratory of Efficient Production of Forest Resources, Beijing Key Laboratory of Wood Science and Engineering, MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, No. 35, Qinghua East Road, Haidian District, Beijing 100083, ChinaZhengbin HeState Key Laboratory of Efficient Production of Forest Resources, Beijing Key Laboratory of Wood Science and Engineering, MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, No. 35, Qinghua East Road, Haidian District, Beijing 100083, ChinaZhenyu WangState Key Laboratory of Efficient Production of Forest Resources, Beijing Key Laboratory of Wood Science and Engineering, MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, No. 35, Qinghua East Road, Haidian District, Beijing 100083, ChinaSonglin YiState Key Laboratory of Efficient Production of Forest Resources, Beijing Key Laboratory of Wood Science and Engineering, MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, No. 35, Qinghua East Road, Haidian District, Beijing 100083, China

ACS Sustainable Chemistry & Engineeringjournal2025en

ABI

Аннотация

Conventional air heat treatment (Air-HT) suffers from low energy efficiency and excessive volatile organic compound (VOC) emissions, limiting its sustainable implementation. This study evaluates microwave-assisted heat treatment (Mic-HT) of Afrormosia wood at 160, 180, and 200 °C as a sustainable alternative. The results showed that Mic-HT can reduce energy consumption by 10.26%–15.16% relative to Air-HT. At 180 °C, this process significantly enhanced mass loss (75.37% increase) and reduced equilibrium moisture content (4.06% decrease) compared to Air-HT. The treatment improved dimensional stability by 20%–42%, resulting in equivalent dimensional stabilization at lower temperatures (M180 ≈ A200). Mic-HT induces anisotropic color changes in transverse darkening at lower temperatures and intensified chromatic alterations at higher temperatures (L*, a*, and b* values at 200 °C exceeding Air-HT by 7.71%, 21.94%, and 26.17%, respectively). VOC profiling revealed a fundamental transition from aldehyde-dominated to phenol-dominated emissions (>40% total VOCs), suppressing straight-chain aldehydes (>99%) and reducing VOC complexity by 60% at 180 °C. Under the combined action of thermal, nonthermal, and selective effects, Mic-HT enables energy-efficient wood modification with enhanced dimensional stability, anisotropic coloration, and selective emission control. This approach supports sustainable, emission-controllable wood processing aligned with carbon neutrality objectives.

Темы

Lignin and Wood Chemistry Thermochemical Biomass Conversion Processes Composting and Vermicomposting Techniques

Идентификаторы

DOI: 10.1021/acssuschemeng.5c04257

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