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Hybrid Silica Aerogels

Niemeyer, Philipp David and Böttcher, Bjarne and Milow, Barbara (2022) Hybrid Silica Aerogels. 6th INTERNATIONAL SEMINAR ON AEROGELS 2022, 28.-30. Sept. 2022, Hamburg, Deutschland.

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Abstract

The ever-growing demand on single use food packaging materials made from expanded polystyrene (EPS) comes at a high price. Careless disposal at the place of consumption leads to environmental pollution. Driven by wind and collected by rivers, an incredible amount of EPS reaches the oceans. Large garbage patches are the shameful result which will outlive the responsible due to ultralow degradation rates. Aiming at the replacement of EPS products we are developing biodegradable hybrid aerogels from polymers and silica. The combination of a ductile polymer aerogel network that covers the brittle silica phase is a promising strategy to overcome the biggest drawback of silica aerogel when handled - dustiness. Hydrophobic silica aerogel in liquid phase was mechanically treated. The efficient breakdown of particles to submillimeter sizes was dust free and scalable. Resulting suspensions were thickened with polymer. With our focus on scalability, we employed different high throughput methods to produce hybrid gel bodies of various shapes. After solvent exchange to ethanol hybrid gels were supercritically dried with CO2. Following physisorption measurement practice hybrid aerogels showed high specific surface areas. A uniquely shaped hysteresis of investigated hybrid aerogels revealed dual mesoporosity. Scanning electron microscope investigations revealed a homogeneous polymer network in which silica particles were embedded. With our main development focus on insulation performance the heat flow method was used to measure the thermal conductivity of hybrid aerogels at values that are one third below of commercial EPS. Monolithic structures made from hybrid aerogels combine lightweight, thermal insulation and biodegradability. Our hybrid silica aerogels are a sustainable alternative to EPS.

Item URL in elib:https://elib.dlr.de/188990/
Document Type:Conference or Workshop Item (Poster)
Title:Hybrid Silica Aerogels
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Niemeyer, Philipp DavidPhilipp.Niemeyer (at) dlr.dehttps://orcid.org/0000-0002-4386-2589
Böttcher, Bjarnebjarne.boettcher (at) dlr.deUNSPECIFIED
Milow, BarbaraBarbara.Milow (at) dlr.dehttps://orcid.org/0000-0002-6350-7728
Date:29 September 2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:hybrid aerogel, silica, alginate, beads, particles, marine based
Event Title:6th INTERNATIONAL SEMINAR ON AEROGELS 2022
Event Location:Hamburg, Deutschland
Event Type:international Conference
Event Dates:28.-30. Sept. 2022
Organizer:Hamburg University of Technology
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - NGC Fahrzeugstruktur II
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Niemeyer, Philipp David
Deposited On:17 Oct 2022 08:25
Last Modified:17 Oct 2022 08:25

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