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Improving the properties of flexible hybrid-silica aerogels

Steffens, Kai and Bialuschewski, Danny and Milow, Barbara (2022) Improving the properties of flexible hybrid-silica aerogels. FEMS Junior EUROMAT 2022, 19.-22. Jul 2022, Coimbra, Portugal.

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Abstract

Silica aerogels with their remarkable properties such as low density and thermal conductivity are prime candidates for a wide range of different applications, such as insulation materials in aviation. While pure silica aerogels are very brittle and difficult to handle, adapting the sol-gel process can result in organic-inorganic hybrid-materials with a high mechanical flexibility, a good hydrophobicity while still retaining a sufficient insulating performance. They were first investigated by Hayase et al. [1] and are based on methyltrimethoxysilane (MTMS) and dimethoxydimethylsilane (DMDMS). For further improvement of the material s properties, the synthesis needs to be tuned. Starting with recipes filed for patenting by the German Aerospace Center (DLR) [2], the synthesis route was first investigated towards varying precursors and their ratios, using different solvents and mixtures, as well as testing a wide range of surfactants and catalysts. Mechanical, thermal, chemical and morphological properties of the samples were investigated. After further polymeric crosslinking the metal-oxygen bonds can be partially substituted by the more lightweight carbon-backbone, while retaining the flexibility of the material. Therefore, investigations using a consistent precursor system of MTMS and dimethoxymethylvinylsilane (DMMVS) are carried out. The above-mentioned properties are required in the field of aviation, and the resulting aerogels can possibly outperform the state-of-the-art compressed fiberglass-mats.

Item URL in elib:https://elib.dlr.de/189546/
Document Type:Conference or Workshop Item (Poster)
Title:Improving the properties of flexible hybrid-silica aerogels
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Steffens, KaiKai.Steffens (at) dlr.dehttps://orcid.org/0000-0003-4310-7775
Bialuschewski, DannyDanny.Bialuschewski (at) dlr.deUNSPECIFIED
Milow, BarbaraBarbara.Milow (at) dlr.dehttps://orcid.org/0000-0002-6350-7728
Date:20 July 2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:aerogels, synthesis parameters, optimization, improvement
Event Title:FEMS Junior EUROMAT 2022
Event Location:Coimbra, Portugal
Event Type:international Conference
Event Dates:19.-22. Jul 2022
Organizer:Federation of European Materials Societies
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - MRO and Cabin
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Steffens, Kai
Deposited On:03 Nov 2022 08:50
Last Modified:03 Nov 2022 08:50

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