An improved method for preparing monolithic aerogels based on methyltrimethoxysilane at ambient pressure Part II: Microstructure and performance of the aerogels

The microstructures, physical properties and mechanical properties of the methyltrimethoxysilane (MTMS) derived aerogels, prepared at ambient pressure using an improved method reported in Part I, have been comprehensively characterised in this paper, as Part II. The study has revealed sophisticated pore structures and morphologies of the aerogels produced, and demonstrated the relationships between the key processing conditions and microstructures of the resultant aerogels. The results of the study also help to further understand the effect of microstructure changes on the macrostructure, volume shrinkage and performances of the aerogels, and provide a general guide on how to manipulate the processing conditions to produce monolithic MTMS based aerogels with desirable structure and properties by ambient pressure drying.

The microstructures of the MTMS derived aerogels prepared at different gelation and ageing temperatures.Figure optionsDownload as PowerPoint slideHighlights
► Reveal sophisticated pore structure and morphology of the aerogels produced.
► The relationship between processing conditions and microstructures and properties.
► Provide a guide on how to produce monolithic MTMS aerogel with desirable quality.
► Improve the practical feasibility of the aerogel fabrication.