Thermal energy storage wood (TESW) is a passive energy-efficient building material that effectively regulates indoor temperature and homogenizes the heat distribution. However, the energy storage performance of TESW is diminished by leakage. In addition, the flammable phase change materials incorporated within the wood are potential fire hazards. In this study, TESW with flame-retardant and anti-leakage (P 9 A 1 –UP–wood C ) was prepared by impregnating wood cell lumen with polyethylene glycol (PEG), phytic acid, urea and acrylic acid, and thermally initiating cross-linking. Accordingly, the enthalpy and phase change temperature of P 9 A 1 –UP–wood C were 47.98 J g −1 and 25.07 °C, respectively. Meanwhile, 98.95 % of the enthalpy remained after 100 cycles. In addition, the total smoke release of P 9 A 1 –UP–wood C was reduced by 28.61 % from that of raw wood (wood C ), and the production rates of CO 2 and CO during the combustion process were also significantly decreased, indicating good smoke-suppressing and toxicity-reducing effects of the flame retardants. The building-energy efficiency of the TESW was simulated in Designbuilder software. This flame-retardant, leakage-resistant TESW prepared via a toxic solvent-free method can improve the safety and long-term stability of passive energy-saving materials and promotes the storage and reuse of low-grade thermal energy.
Mengmeng Zhang,Zhihui Sui,Lijian Sun,Qi Zhang,Yikun Xu,Lihua Deng,Fang Hu
Functional thermoregulation fabrics have emerged as a significant area of research and development within the textile industry, garnering extensive attention in recent years. Herein, dodecyl alcohol/paraffin wax-styrene-acrylate emulsions (DD/PW-TiO₂/FSiWSA) were prepared using the core-shell emulsion polymerization method and used for the finishing of linen fabrics. To address the issues of low solid content, insufficient stability, and poor water resistance in water-based styrene-acrylic emulsions (WSA), nano-TiO₂ was first modified with 3-methacryloxy propyl trimethoxysilane (KH-570). Subsequently, KH-570 modified nano-TiO₂ and organic fluorosilicon were simultaneously introduced into the polymer skeleton. The structural characteristics of DD/PW-TiO₂/FSiWSA were studied. The results shows that the DD/PW-TiO₂/FSiWSA coating increases the water contact angle (WCA) of linen fabric from 0° to 131.95°, while also providing excellent stain resistance. The modified fabric has excellent anti-UV properties, and the UV protection factor is as high as 56.16. Moreover, the modified fabric exhibited excellent antibacterial activity against A. niger and S. aureus . Encouragingly, the modified fabric has excellent heat storage and temperature regulation capability, with a peak phase transition temperature of 23.6 °C, a latent heat of fusion of 25.36 J/g, and a 65.9 % increase in thermal conductivity. The coating is universal and can enhance the hydrophobicity of materials such as cotton fabrics, polyester cotton, paper, cardboard and wood, with a WCA range of 115.56° ~ 131.72°. Therefore, this multifunctional coating will lead cellulose materials towards diverse applications.
危险品化学品经营许可证（带存储）