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9. Effect of the indoor humidity control characteristics for amine grafted functionalized mesoporous silica nanomaterials

Author

Lin, Ya-Wen, Lee, Wei-Hao, Kuo, Bo-Yi, and Lin, Kae-Long

Abstract

ABSTRACTIn 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) and, an adjustable pore size and an easy structural surface grafted can use different functional groups for the development of new materials. The 24-h moisture adsorption capacity of the APTES/MCM-41 with 2.5 vol.% amine functional groups was 37.02 g/m2, which conforms to JIS A 1470–1 specifications and far exceeds that of diatomaceous earth and inorganic materials in humidity control coatings (18.6 g/m2). APTES/MCM-41 could be used as an alternative to mechanical dehumidifiers.

Published
2023
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10. Synthesis and Grafted NH 2 -Al/MCM-41 with Amine Functional Groups as Humidity Control Material from Silicon Carbide Sludge and Granite Sludge.

Author

Lin, Ya-Wen, Lee, Wei-Hao, Lin, Kae-Long, and Kuo, Bo-Yi

Subjects
SILICON carbide, HUMIDITY control, FUNCTIONAL groups, MOISTURE in building materials, GRANITE, WATER treatment plant residuals, HUMIDITY, SILICON isotopes
Abstract

Mesoporous Al/MCM-41 was synthesized by extracting silicon carbide sludge and granite sludge as the sources of silicon and aluminum. Different concentrations of aminosilane (2.5, 5, 7.5 vol.%) were used to reflux the grafted NH2-Al/MCM-41 with amine functional groups (NH2-Al/MCM-41). The physical and chemical characteristics were analyzed. The results confirmed that silicon carbide sludge and granite sludge can effectively synthesize Al/MCM-41 with low cost and environmental protection. Reflow grafted amine functional groups can effectively improve the surface properties of NH2-Al/MCM-41. The moisture adsorption and desorption capacity of grafted NH2-Al/MCM-41 with amine functional groups was also studied. Based on moisture adsorption and desorption capacity, the surface properties of NH2-Al/MCM-41 were studied. When 5 vol.% of NH2-Al/MCM-41 amine functional groups is added, the moisture adsorption and desorption capacity is best. When the relative humidity = 95%, the equilibrium moisture content is 39.4 kg/kg, which complies with the standard of Japanese Industrial Standard (JIS A 1475). Therefore, the use of waste derived from the industry to replace expensive commercial materials was simple and environmentally friendly, and the grafted NH2-Al/MCM-41 with amine functional groups can be utilized in multiple applications, particularly as moisture regulation materials in building engineering. [ABSTRACT FROM AUTHOR]

Published
2021
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