2026-06-27T22:58:54Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/189092024-07-22T18:13:50Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Sanz Pont, Daniel author Sanz Arauz, David author Bedoya, César author Flat, Robert author López De Andrés, María Sol 2023-06-17T22:50:09Z 2023-06-17T22:50:09Z 2016-09 1359-5997 ; Essn: 1871-6873 10.1617/s11527-015-0746-8 https://hdl.handle.net/20.500.14352/18909 https://link.springer.com/journal/11527/49/9 https://link.springer.com High performance thermal insulating composite materials can be produced with mineral binders and hydrophobic aerogel particles through a hydrophilization process for the latter with surfactants. The present study is focused on the development of aerogel/calcium sulfate composites by the hydrophilization of hydrophobic silica aerogel particles through a polymer-based surfactant. Its effects on the microstructure and hydration degree are examined as well as their relation to the resulting mechanical and physical properties. Results show that composites with an around 60 % of aerogel by volume can achieve a thermal conductivity <30 mW/m × K. Interestingly, a surfactant addition of 0.1 % by wt% of the water in the mixtures provides better material properties compared to a surfactant wt% addition of 5 %. However, it has been found around 40 % entrained air, affecting the material properties by reducing the binder and aerogel volume fractions within the composites. Moreover, gypsum crystallization starts to be inhibited at aerogel volume fractions >35 %. Towards material optimization, a model for the calculation of thermal conductivity of composites and an equation for the compressive strength are proposed. eng Anhydrite/aerogel composites for thermal insulation journal article URL https://docta.ucm.es/bitstreams/f2524b7b-5a8e-4758-a139-1ce538abb602/download File MD5 7a89c52219f3401f0fa92925e8327673 2542451 application/pdf AnhydriteAerogelCompositesForT.pdf