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Tuning the Properties of Phenolic Aerogels by Derivatization of Phenolic Precursors

Anklam, Thomas and Milow, Barbara and Tannert, René (2023) Tuning the Properties of Phenolic Aerogels by Derivatization of Phenolic Precursors. GDCh-Wissenschaftsforum Chemie 2023, 2023-09-04 - 2023-09-06, Leipzig, Deutschland.

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[img] PDF - Only accessible within DLR until September 2025


Aerogels are open porous nanostructured solids obtained by sol-gel, dissolutionreprecipitation, or polymerization processes followed by drying of the resulting wet gels. They can be of organic or inorganic nature, stiff or flexible, translucent or opaque, hydrophilic or hydrophobic and are known for their remarkable properties such as low densities, low heat conductivities, high porosities, high specific surface areas and low sound transmittance.[1] The most prominent example of an organic aerogel, belonging to the phenolic aerogels, is the resorcinol-formaldehyde (RF) aerogel.[2] The phenolic nature of RF and phenolic aerogels in general renders these materials hydrophilic, a factor that partly limits their commercial use.[3] In order to address this issue, we report on the condensation of alkoxy-substituted phenols with formaldehyde, yielding alkylated analogs of phenolic aerogels. The influence of synthetic parameters like solvent, temperature and catalyst concentration as well as the alkyl chain length and the nucleophilic reactivity of the alkoxy-substituted phenols on the properties (e. g. surface and pore characteristics and wetting behavior) of the resulting aerogels are presented References: [1]: L. Ratke, P. Gurikov, The Chemistry and Physics of Aerogels: Synthesis, Processing, and Properties, Cambridge University Press, Cambridge, 2021. [2]: a) R. W. Pekala, J. Mater. Sci. 1989, 24, 3221-3227. b) S. Mulik, C. Sotiriou-Leventis, N. Leventis, Chem. Mater. 2007, 19, 6138-6144. c) A. M. ElKhatat, S. A. Al Muhtaseb, Adv. Mater. 2011, 23, 2887-2903. [3]: A. V. Rao, G. M. Pajonk, D. Y. Nadargi, M. M. Koebel, in Aerogels Handbook (Eds.: M. A. Aegerter, N. Leventis, M. M. Koebel), Springer New York, New York, NY, 2011, pp. 79-101.

Item URL in elib:https://elib.dlr.de/197068/
Document Type:Conference or Workshop Item (Poster)
Title:Tuning the Properties of Phenolic Aerogels by Derivatization of Phenolic Precursors
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Anklam, ThomasUNSPECIFIEDhttps://orcid.org/0000-0002-3192-907XUNSPECIFIED
Milow, BarbaraUNSPECIFIEDhttps://orcid.org/0000-0002-6350-7728UNSPECIFIED
Tannert, RenéUNSPECIFIEDhttps://orcid.org/0000-0001-9484-8886UNSPECIFIED
Date:4 September 2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:aerogel, hydrophobic, derivatization, phenolic ether, hansen solubility parameters, microstructure control, contact angle
Event Title:GDCh-Wissenschaftsforum Chemie 2023
Event Location:Leipzig, Deutschland
Event Type:international Conference
Event Start Date:4 September 2023
Event End Date:6 September 2023
Organizer:Gesellschaft Deutscher Chemiker e.V.
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: Anklam, Thomas
Deposited On:18 Oct 2023 11:23
Last Modified:24 Apr 2024 20:57

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