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Effect of Process Conditions on the Properties of Resorcinol-Formaldehyde Aerogel Microparticles Produced via Emulsion-Gelation Method

Kamal Mohamed, Seeni Meera and Heinrich, Charlotte and Milow, Barbara (2021) Effect of Process Conditions on the Properties of Resorcinol-Formaldehyde Aerogel Microparticles Produced via Emulsion-Gelation Method. Polymers, 13 (15), p. 2409. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/polym13152409. ISSN 2073-4360.

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Official URL: https://www.mdpi.com/2073-4360/13/15/2409

Abstract

Organic aerogels in the form of powder, microgranules and microsized particles receive considerable attention due to their easy fabrication, low process time and costs compared to their monolithic form. Here, we developed resorcinol-formaldehyde (RF) aerogel microparticles by using an emulsion-gelation method. The main objective of this study is to investigate the influence of curing time, stirring rate, RF sol:oil ratio and initial pH of the sol in order to control the size and properties of the microparticles produced. The emulsion-gelation of RF sol prepared with sodium carbonate catalyst in an oil phase at 60 °C was explored. RF microparticles were washed with ethanol to remove the oil phase followed by supercritical and ambient pressure drying. The properties of the dried RF microparticles were analyzed using FT-IR, N2 adsorption isotherm, gas pycnometry, wide angle X-ray scattering and scanning electron microscope. RF microparticles with high surface area up to 543 m2/g and large pore volume of 1.75 cm3/g with particle sizes ranging from 50–425 µm were obtained.

Item URL in elib:https://elib.dlr.de/143324/
Document Type:Article
Title:Effect of Process Conditions on the Properties of Resorcinol-Formaldehyde Aerogel Microparticles Produced via Emulsion-Gelation Method
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kamal Mohamed, Seeni Meeraseenimeera.kamalmohamed (at) dlr.dehttps://orcid.org/0000-0002-8812-1362
Heinrich, CharlotteCharlotte.Heinrich (at) dlr.dehttps://orcid.org/0000-0002-8970-9598
Milow, BarbaraBarbara.Milow (at) dlr.dehttps://orcid.org/0000-0002-6350-7728
Date:6 August 2021
Journal or Publication Title:Polymers
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:13
DOI :10.3390/polym13152409
Page Range:p. 2409
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2073-4360
Status:Published
Keywords:aerogel; resorcinol-formaldehyde; emulsion-gelation; microparticles; supercritical drying
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Energie und Verkehr, V - NGC Fahrzeugstruktur II
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Kamal Mohamed, Seeni Meera
Deposited On:17 Aug 2021 07:56
Last Modified:28 Apr 2022 09:28

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