School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, 243032, Anhui, People's Republic of China.
School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan, 243032, Anhui, People's Republic of China.
Environ Sci Pollut Res Int. 2023 Apr;30(18):51830-51843. doi: 10.1007/s11356-023-25979-6. Epub 2023 Feb 23.
The decanoic acid-palmitic acid composite phase change material compounds with SiO and TiO to prepare decanoic acid-palmitic acid/SiO@TiO phase change microcapsules (D-P-SiO@TiO PCM). The D-P-SiO@TiO PCM could show efficient temperature regulation, remove pollutants through photocatalysis, and control air humidity. However, it is difficult to obtain the best experimental scheme directly using the traditional experimental setup due to the complicated photocatalytic-humidity performance. The radial basis function (RBF) model optimized the uniform experimental design parameters, and the D-P-SiO@TiO PCM showed enhanced photocatalytic-humidity performance. The RBF-calculated preparation parameters were as follows: the molar ratio of decanoic acid-palmitic acid to tetraethyl silicate was 0.42, pH was 1.83, the molar ratio of deionized water to tetraethyl silicate was 98.15, while the molar rate of tetrabutyl titanate to tetraethyl silicate was 0.76. The degradation rate of gaseous formaldehyde by the RBF-optimized D-P-SiO@TiO PCM was 69.57% after 6 h, and the moisture content was between 0.0923 and 0.0940 g·g at 43.16-75.29% relative humidity (RH). The comparison between model optimization and the experiment sample prepared using the optimized parameters showed that the theoretical photocatalytic-humidity performance target value was 2.0502, and the tested target value was 2.0757. The error calculated from these two values was only 1.24%, and both were better than the best value of uniform experimental calculation. RBF mathematical model was proved to be an effective, convenient, and economic-saving method to simulate and predict D-P-SiO@TiO PCM experimental design parameters. SEM and TEM analyses of the RBF-optimized D-P-SiO@TiO PCM showed a uniform spherical structure, and the particle size analysis analyses was about 200 nm. The DSC analysis showed the phase transition temperature range was between 16.97 and 28.94 °C, within the comfort range of the human body. The UV-Vis investigations showed the absorption edge of the RBF-optimized D-P-SiO@TiO PCM was 380 nm, in line with the band gap structure of the TiO anatase phase. The thermogravimetric investigations showed that this composite was stable at normal temperature and pressure. After a 100 times hot-cold cycle, the quality of the RBF-optimized D-P-SiO@TiO PCM maintained its stability, as the photocatalytic-humidity performance was almost the same. The N-adsorption analysis showed it had a high specific surface area and irregular pore structures, which could help it regulate air humidity. Considering these results, the D-P-SiO@TiO PCM, a new ecological functional material, would be used in the construction industry to improve the architectural ecological environment.
癸酸-棕榈酸复合相变材料与 SiO 和 TiO 复合，制备癸酸-棕榈酸/SiO@TiO 相变微胶囊（D-P-SiO@TiO PCM）。D-P-SiO@TiO PCM 可以实现高效的温度调节、通过光催化去除污染物和控制空气湿度。然而，由于复杂的光催化-湿度性能，直接使用传统的实验装置很难获得最佳的实验方案。径向基函数（RBF）模型优化了均匀实验设计参数，D-P-SiO@TiO PCM 表现出增强的光催化-湿度性能。RBF 计算的制备参数如下：癸酸-棕榈酸与正硅酸乙酯的摩尔比为 0.42，pH 值为 1.83，去离子水与正硅酸乙酯的摩尔比为 98.15，四丁基钛酸酯与正硅酸乙酯的摩尔比为 0.76。RBF 优化的 D-P-SiO@TiO PCM 在 6 小时内对气态甲醛的降解率达到 69.57%，在 43.16-75.29%相对湿度（RH）下的湿度含量在 0.0923 到 0.0940 g·g 之间。模型优化与优化参数制备的实验样品之间的比较表明，理论光催化-湿度性能目标值为 2.0502，测试目标值为 2.0757。这两个值的计算误差仅为 1.24%，均优于均匀实验计算的最佳值。RBF 数学模型被证明是一种有效、方便和经济的方法，可用于模拟和预测 D-P-SiO@TiO PCM 实验设计参数。RBF 优化的 D-P-SiO@TiO PCM 的 SEM 和 TEM 分析显示出均匀的球形结构，粒径分析约为 200nm。DSC 分析表明，相变温度范围在 16.97 和 28.94°C 之间，在人体舒适范围内。UV-Vis 研究表明，RBF 优化的 D-P-SiO@TiO PCM 的吸收边缘为 380nm，符合 TiO 锐钛矿相的能带结构。热重分析表明，在常温常压下，该复合材料稳定。经过 100 次冷热循环后，RBF 优化的 D-P-SiO@TiO PCM 的质量保持稳定，光催化-湿度性能几乎相同。N-吸附分析表明，它具有高比表面积和不规则的孔结构，有助于调节空气湿度。考虑到这些结果，癸酸-棕榈酸/SiO@TiO 相变微胶囊作为一种新型生态功能材料，将用于建筑行业，以改善建筑生态环境。
