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Gels
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Recent Progress and Development of Advanced Aerogels: Latest Processing Methods,...
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Recent Progress and Development of Advanced Aerogels: Latest Processing Methods, Improved Properties and Application (2nd Edition)

A special issue of Gels (ISSN 2310-2861). This special issue belongs to the section "Gel Processing and Engineering".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 2824

Special Issue Editors

Dr. Mingze Sun

E-Mail Website
Guest Editor
1. Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, USA
2. Department of Surgery, Columbia University Medical Center, New York, NY, USA
Interests: polymer processing; polymer characterization; aerogel; gas-barrier films; multilayered films; biomedical device; in vitro/in vivo study; flame-retardant materials
Special Issues, Collections and Topics in MDPI journals
Dr. Tobias Abt

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Universitat Politècnica de Catalunya (UPC), Barcelona, Spain
Interests: aerogels; polymer composites; polymer processing; polymer characterization; additive manufacturing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Aerogels have attracted considerable attention in recent decades due to their natural, low-toxicity features and controllable, porous structures. Utilizing various matrices, enhanced additives, and updated processing technologies, aerogel composites display optimized properties in the realms of insulation, flame retardancy, absorption, and catalysis and have many potential applications in aerospace engineering, construction, and electronic and medical devices. In this Special Issue, we aim to summarize the progress in the investigation of aerogels through the publication of studies covering inorganic, organic, and hybrid substances of this type, focusing in particular on improved properties and functionalities. We hope to collect recent findings on these gels and determine their potential uses in future applications. Submissions of studies discussing uses of advanced additives, the latest processing technologies, and the optimization of the properties of aerogels are welcomed.

Dr. Mingze Sun
Dr. Tobias Abt
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Gels is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2100 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • aerogel
  • processing
  • properties
  • application

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Related Special Issue

Published Papers (3 papers)

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Research

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16 pages, 5445 KiB  
Article
Aerogels of Polypyrrole/Tannic Acid with Nanofibrillated Cellulose for the Removal of Hexavalent Chromium Ions
by Islam M. Minisy, Oumayma Taboubi, Jiřina Hromádková and Patrycja Bober
Gels 2024, 10(7), 415; https://doi.org/10.3390/gels10070415 - 22 Jun 2024
Viewed by 730
Abstract
The preparation of conducting polymer aerogels is an effective strategy to produce innovative materials with enhanced physicochemical properties. Herein, polypyrrole (PPy) aerogels were oxidatively prepared in the presence of tannic acid (TA) with different concentrations (2.5, 5, and 10% mole ratio to pyrrole [...] Read more.
The preparation of conducting polymer aerogels is an effective strategy to produce innovative materials with enhanced physicochemical properties. Herein, polypyrrole (PPy) aerogels were oxidatively prepared in the presence of tannic acid (TA) with different concentrations (2.5, 5, and 10% mole ratio to pyrrole monomer) under freezing conditions. Nanofibrillated cellulose (NFC) was added during the PPy/TA synthesis to enhance mechanical stability. The effect of TA concentration on the aerogels’ morphology, conductivity, thermal stability, and adsorption capacity was investigated. The conductivity of 9.6 ± 1.7 S cm−1 was achieved for PPy/TA prepared with 2.5% TA, which decreased to 0.07 ± 0.01 S cm−1 when 10% TA was used. PPy/TA aerogels have shown high efficacy in removing Cr(VI) ions from aqueous solutions. Adsorption experiments revealed that all the aerogels follow pseudo-second-order kinetics. PPy/TA prepared with NFC has a maximum adsorption capacity of 549.5 mg g−1. Full article
(This article belongs to the Special Issue Recent Progress and Development of Advanced Aerogels: Latest Processing Methods, Improved Properties and Application (2nd Edition))
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13 pages, 6302 KiB  
Article
Fabrication and Advanced Imaging Characterization of Magnetic Aerogel-Based Thin Films for Water Decontamination
by Adelina-Gabriela Niculescu, Bogdan Mihaiescu, Alexandra Cătălina Bîrcă, Alina Moroșan, Oana Maria Munteanu (Mihaiescu), Bogdan Ștefan Vasile, Tony Hadibarata, Daniela Istrati, Dan Eduard Mihaiescu and Alexandru Mihai Grumezescu
Gels 2024, 10(6), 394; https://doi.org/10.3390/gels10060394 - 11 Jun 2024
Viewed by 933
Abstract
Aerogels have emerged as appealing materials for various applications due to their unique features, such as low density, high porosity, high surface area, and low thermal conductivity. Aiming to bring the advantages of these materials to the environmental field, this study focuses on [...] Read more.
Aerogels have emerged as appealing materials for various applications due to their unique features, such as low density, high porosity, high surface area, and low thermal conductivity. Aiming to bring the advantages of these materials to the environmental field, this study focuses on synthesizing magnetic silica aerogel-based films suitable for water decontamination. In this respect, a novel microfluidic platform was created to obtain core-shell iron oxide nanoparticles that were further incorporated into gel-forming precursor solutions. Afterward, dip-coating deposition was utilized to create thin layers of silica-based gels, which were further processed by 15-hour gelation time, solvent transfer, and further CO2 desiccation. A series of physicochemical analyses (XRD, HR-MS FT-ICR, FT-IR, TEM, SEM, and EDS) were performed to characterize the final films and intermediate products. The proposed advanced imaging experimental model for film homogeneity and adsorption characteristics confirmed uniform aerogel film deposition, nanostructured surface, and ability to remove pesticides from contaminated water samples. Based on thorough investigations, it was concluded that the fabricated magnetic aerogel-based thin films are promising candidates for water decontamination and novel solid-phase extraction sample preparation. Full article
(This article belongs to the Special Issue Recent Progress and Development of Advanced Aerogels: Latest Processing Methods, Improved Properties and Application (2nd Edition))
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Review

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26 pages, 4543 KiB  
Review
Bio-Based Aerogels in Energy Storage Systems
by Vilko Mandić, Arijeta Bafti, Ivana Panžić and Floren Radovanović-Perić
Gels 2024, 10(7), 438; https://doi.org/10.3390/gels10070438 - 30 Jun 2024
Cited by 1 | Viewed by 906
Abstract
Bio-aerogels have emerged as promising materials for energy storage, providing a sustainable alternative to conventional aerogels. This review addresses their syntheses, properties, and characterization challenges for use in energy storage devices such as rechargeable batteries, supercapacitors, and fuel cells. Derived from renewable sources [...] Read more.
Bio-aerogels have emerged as promising materials for energy storage, providing a sustainable alternative to conventional aerogels. This review addresses their syntheses, properties, and characterization challenges for use in energy storage devices such as rechargeable batteries, supercapacitors, and fuel cells. Derived from renewable sources (such as cellulose, lignin, and chitosan), bio-based aerogels exhibit mesoporosity, high specific surface area, biocompatibility, and biodegradability, making them advantageous for environmental sustainability. Bio-based aerogels serve as electrodes and separators in energy storage systems, offering desirable properties such as high specific surface area, porosity, and good electrical conductivity, enhancing the energy density, power density, and cycle life of devices. Recent advancements highlight their potential as anode materials for lithium-ion batteries, replacing non-renewable carbon materials. Studies have shown excellent cycling stability and rate performance for bio-aerogels in supercapacitors and fuel cells. The yield properties of these materials, primarily porosity and transport phenomena, demand advanced characterization methods, and their synthesis and processing methods significantly influence their production, e.g., sol–gel and advanced drying. Bio-aerogels represent a sustainable solution for advancing energy storage technologies, despite challenges such as scalability, standardization, and cost-effectiveness. Future research aims to improve synthesis methods and explore novel applications. Bio-aerogels, in general, provide a healthier path to technological progress. Full article
(This article belongs to the Special Issue Recent Progress and Development of Advanced Aerogels: Latest Processing Methods, Improved Properties and Application (2nd Edition))
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