Amine grafted functionalized mesoporous silica nanomaterials for efficient environmentally friendly building materials for indoor humidity control

Abstract

In this study, the silicon source and aluminum source rich in stone mud were extracted, and the best alkali fusion process for different alkali fusion temperatures and alkali agent ratios was determined by the alkali fusion salt method. The surface of the material was grafted by 3-aminopropyltriethoxysilane to obtain an amine grafted functionalized groups MCM-41 material (APTES/MCM-41). The APTES/MCM-41 material was analyzed and water adsorption/desorption experiment was performed. Utilizing stone sludge to obtain APTES/MCM-41, which has a high specific surface area (25.19 m2/g).An adjustable pore size and an easy structural surface grafted can use different functional groups for the development of new materials. Over 24 hours at high humidity, the moisture adsorption capacity of the APTES/MCM-41 with 2.5 wt.% amine grafted functionalized groups can reach 37.02 g/m2, meeting the JIS A 1470-1 specifications. Comparing the moisture adsorption (18.6 g/m2) of diatomaceous earth and inorganic materials in humidity control coatings, the performance of APTES/MCM-41 materials is relatively excellent. The APTES/MCM-41 can effectively compensate for the shortage of mechanical dehumidifiers due to its high energy consumption and inability for use in small spaces, replacing mechanical dehumidification as an emerging humidity control method.