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Enhancing flexible hybrid silica aerogels: integrating new functionality through addition of different precursors

Bialuschewski, Danny and Steffens, Kai and Milow, Barbara (2022) Enhancing flexible hybrid silica aerogels: integrating new functionality through addition of different precursors. 6th International Seminar on Aerogels, 28.-30.09.2022, Hamburg, Deutschland.

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Abstract

Hybrid silica aerogels can overcome one of the main drawbacks of classical silica aerogels, which are unsuitable for many industrial applications due to their brittle network. By modifying the synthesis through changes in the sol-gel, drying or post-treatment processes, different properties like the mechanical flexibility can be enhanced. This was done by Hayase in 2011 through addition of one or two methylgroups to the tetravalent Si-precursors, resulting in flexible silica aerogels known as marshmallows. These are used as basis for further improvements and modifications, allowing the investigation towards more potential uses. By modifying different parts of the synthesis, changes on a chemical and physical level can be introduced. In this work, we went from Hayase's binary to a ternary precursor system. One component investigated was tetraethoxysilane (TEOS), often used for classical silica aerogels, with the goal reduce the overall pore sizes, changing the aerogels behavior. This however comes at the expense of flexibility. Another precursor with potential for functionalization is vinylmethyldimethoxysilane (VMDMS). The vinyl- groups allow the binding of additional molecules through radical polymerization, giving rise to the possibility to create hybrids otherwise not possible.

Item URL in elib:https://elib.dlr.de/188895/
Document Type:Conference or Workshop Item (Poster)
Title:Enhancing flexible hybrid silica aerogels: integrating new functionality through addition of different precursors
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bialuschewski, DannyDanny.Bialuschewski (at) dlr.deUNSPECIFIED
Steffens, KaiKai.Steffens (at) dlr.deUNSPECIFIED
Milow, BarbaraBarbara.Milow (at) dlr.dehttps://orcid.org/0000-0002-6350-7728
Date:2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Aerogels, Hybrid-Silica-Aerogels, Sol-Gel, Polymerization,
Event Title:6th International Seminar on Aerogels
Event Location:Hamburg, Deutschland
Event Type:international Conference
Event Dates:28.-30.09.2022
Organizer:Hamburg University of Technology
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: Bialuschewski, Danny
Deposited On:21 Oct 2022 09:49
Last Modified:21 Oct 2022 09:49

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