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New hybrid alginate-silica aerogel films

Niemeyer, Philipp David and Vöpel, Pascal and Milow, Barbara (2023) New hybrid alginate-silica aerogel films. 8th International Polysaccharide Conference, 2023-09-17 - 2023-09-22, Graz, Österreich.

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Abstract

Silica aerogels already show good thermal insulation performance, but they are usually brittle, which particularly with thin films leads to poor handling. Various combinations of a silica aerogel phase and a strengthening biopolymer phase have been reported in the literature, but these are difficult to scale up.[1, 2] In this work, highly scalable processes were developed for the fabrication of mechanically stable hybrid silica-aerogel films. The particle composite material consisting of silica aerogel granules embedded in an alginate aerogel matrix enables bending radii of 10 mm. Scanning electron microscopy studies show that the superhydrophobic silica phase connects perfectly with the fibrillar alginate aerogel phase, see Figure 1. Films of a thickness of 750 µm with a volume ratio of silica aerogel to alginate aerogel of 1:1 were produced. The composite material is perfectly scalable from laboratory to large-scale production with manufacturing methods already established in the market. Due to the low average pore size of 14nm, which is mainly dominated by the silica phase, the measured thermal conductivity at 0°C is 0.018 W·(m·K)-1 and increases to 0.023 W·(m·K)-1 at 80°C. In the presentation, we will look at the manufacturing process and discuss the properties of the composite material based on applications.

Item URL in elib:https://elib.dlr.de/197546/
Document Type:Conference or Workshop Item (Speech)
Title:New hybrid alginate-silica aerogel films
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Niemeyer, Philipp DavidUNSPECIFIEDhttps://orcid.org/0000-0002-4386-2589UNSPECIFIED
Vöpel, PascalUNSPECIFIEDhttps://orcid.org/0000-0001-8233-7261UNSPECIFIED
Milow, BarbaraUNSPECIFIEDhttps://orcid.org/0000-0002-6350-7728UNSPECIFIED
Date:2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Aerogel film, alginate, silica, hybrid
Event Title:8th International Polysaccharide Conference
Event Location:Graz, Österreich
Event Type:international Conference
Event Start Date:17 September 2023
Event End Date:22 September 2023
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 - FFAE - Fahrzeugkonzepte, Fahrzeugstruktur, Antriebsstrang und Energiemanagement
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Niemeyer, Philipp David
Deposited On:18 Oct 2023 11:23
Last Modified:24 Apr 2024 20:57

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