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Structure-Processing-Property Study of Aerogel Composites
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Structure-Processing-Property Study of Aerogel Composites

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (30 September 2020) | Viewed by 6513

Special Issue Editors

Dr. Miguel Sanchez-Soto

E-Mail Website
Guest Editor
Centre Català del Plàstic, Universitat Politècnica de Catalunya • Barcelona Tech, 08019 Barcelona, Spain
Interests: polymer-based and composite aerogels; bio-based materials; recycling and recovery; flame retardancy; mechanical properties; fracture behaviour
Special Issues, Collections and Topics in MDPI journals
Dr. Tobias Abt

E-Mail Website
Co-Guest Editor
Centre Català del Plàstic, C/ Colom 114, 08222 Terrassa, Spain
Interests: aerogels; biopolymers; thermoplastic composites; nanocomposites

Special Issue Information

Dear Colleagues,

The Special Issue, “Structure-Processing-Property Study of Aerogel Composites” will encompass the current understanding of structure–processing–property relationships as well as the recent advances in the synthesis, characterization and applications of the different types of composite aerogels. These highly porous materials combine outstanding properties such as low density, ultra-low thermal conductivity, great sorption capacity and high surface area. Multifunctionality can be obtained when small amounts of different fillers are dispersed in the aerogels. Therefore, interesting new properties such as fire resistance, electrical conductivity or magnetic properties can be imparted. Moreover, the relatively low mechanical properties and structural integrity of aerogels are commonly enhanced with the incorporation of reinforcements.

This special issue focuses on all types of composite aerogels, organic, inorganic and also including hybrid, reinforced or modified types but especially on how their properties are affected by the microstructure, composition and processing parameters of composite aerogels. Original research papers are solicited on recent developments in aerogel processing, characterization, structure and resulting properties. Articles and reviews dealing with new aerogel applications are also welcome.

This Special Issue is an initiative of the AERoGELS (CA18125 - Advanced Engineering and Research of aeroGels for Environment and Life Sciences) Action (https://cost-aerogels.eu) by COST (European Cooperation in Science and Technology) that aims to boost the development of aerogels for biomedical and environmental applications by setting up a multidisciplinary knowledge-based network from technological, scientific and market points of view

Prof. Dr. Miguel Sanchez-Soto
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. Materials is an international peer-reviewed open access semimonthly 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 2600 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 Composites
  • Structure-Processing-Property relationships
  • Aerogel technology
  • Fillers and nanofillers
  • Hybrid materials
  • Freeze and supercritical drying
  • Multifunctional
  • Porosity
  • Thermal insulation
  • Flame-retardant
  • Applications

Published Papers (2 papers)

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Research

14 pages, 4178 KiB  
Article
Advanced Opacified Fiber-Reinforced Silica-Based Aerogel Composites for Superinsulation of Exhaust Tubing Systems in Semi-Stationary Motors
by Markus Heyer, André Berkefeld, Pascal Voepel and Barbara Milow
Materials 2020, 13(12), 2677; https://doi.org/10.3390/ma13122677 - 12 Jun 2020
Cited by 7 | Viewed by 3193
Abstract
Within this study, monolithic three-dimensional silica aerogel (SA) composite parts with super insulating properties are presented. A generic part based on fiber-reinforced (FR) silica aerogel for thermal insulation of the exhaust tubing system—to keep the exhaust gases as hot as possible to improve [...] Read more.
Within this study, monolithic three-dimensional silica aerogel (SA) composite parts with super insulating properties are presented. A generic part based on fiber-reinforced (FR) silica aerogel for thermal insulation of the exhaust tubing system—to keep the exhaust gases as hot as possible to improve the efficiency of the catalyst system—was produced via a sol-gel-based molding process in combination with a supercritical drying using scCO2. A thermal conductivity of 16 mW m−1 K−1 was measured via a heat flow meter technique. In this manuscript, we present a full cycle of the material compound design, starting with fundamental material evaluation including aerogel optimization, opacifier influence, and casting process. The obtained generic part in shape of a half-shell for pipe insulation is characterized under real conditions. Full article
(This article belongs to the Special Issue Structure-Processing-Property Study of Aerogel Composites)
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12 pages, 2436 KiB  
Article
Preparation, Characterization, and In Vitro Evaluation of Resveratrol-Loaded Cellulose Aerogel
by Lili Qin, Xinyu Zhao, Yiwei He, Hongqiang Wang, Hanjing Wei, Qiong Zhu, Ting Zhang, Yao Qin and Ai Du
Materials 2020, 13(7), 1624; https://doi.org/10.3390/ma13071624 - 01 Apr 2020
Cited by 18 | Viewed by 2748
Abstract
Resveratrol is a natural active ingredient found in plants, which is a polyphenolic compound and has a variety of pharmaceutical uses. Resveratrol-loaded TEMPO-oxidized cellulose aerogel (RLTA) was prepared using a freeze-drying method, employing high speed homogenization followed by rapid freezing with liquid nitrogen. [...] Read more.
Resveratrol is a natural active ingredient found in plants, which is a polyphenolic compound and has a variety of pharmaceutical uses. Resveratrol-loaded TEMPO-oxidized cellulose aerogel (RLTA) was prepared using a freeze-drying method, employing high speed homogenization followed by rapid freezing with liquid nitrogen. RLTAs were designed at varying drug–cellulose aerogel ratios (1:2, 2:3, 3:2, and 2:1). It could be seen via scanning electron microscopy (SEM) that Res integrated into TEMPO-oxidized cellulose (TC) at different ratios, which changed its aggregation state and turned it into a short rod-like structure. Fourier transform infrared (FTIR) spectra confirmed that the RLTAs had the characteristic peaks of TC and Res. In addition, X-ray diffraction (XRD) demonstrated that the grain size of RLTA was obviously smaller than that of pure Res. RLTAs also had excellent stability in both simulated gastric fluid and phosphate buffer solution. The drug release rate was initially completed within 5 h under a loading rate of 30.7 wt%. The results of an MTT assay showed the low toxicity and good biocompatibility of the RLTAs. TC aerogel could be a promising drug carrier that may be widely used in designing and preparing novel biomedicine. Full article
(This article belongs to the Special Issue Structure-Processing-Property Study of Aerogel Composites)
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