ホルムアルデヒド除去マイクロカプセルを配合した木質複合材料の強化：長期的、徐放性、環境適合性

The long-term emission of free formaldehyde from plywood is a common problem, and the addition of formaldehyde capture agents typically reduces the plywood bonding performance. In this paper, melamine(ME)@sodium alginate (SA)/ethyl cellulose (EC) double-shell microcapsules (MEM) were prepared for the first time by the sol-gel method. The preparation process was optimized by response surface methodology via Box-Behnken design, and the results were highly reliable. MEM showed good spheroidizing properties, and its coating rate reached 71.97%. When 8% MEM was added to plywood, the emission of formaldehyde decreased by 47.67%. Moreover, the bonding strength reached 1.27 MPa, which was 8.32% higher than that of the control group. This performance met both the mainstream E₀-grade formaldehyde emission standard as well as the national Class II plywood standard of China, solving the problem of formaldehyde pollution in the environment. Therefore, MEM addresses the trade-off between mitigating the harm to human health and avoiding a reduction in plywood performance when using formaldehyde scavengers. Compared with tea polyphenol@SA/EC(TPM) and sodium chlorite@SA/EC(CDM) with different core materials, MEM is a promising low-cost microcapsule agent. This research provides potential alternatives for improving indoor air quality, green building certification, and replacing traditional inefficient cleaning methods.