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Recent Advances in the Synthesis and Application of Bio-Based Foams...
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Recent Advances in the Synthesis and Application of Bio-Based Foams and Aerogels

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Porous Materials".

Deadline for manuscript submissions: closed (20 January 2023) | Viewed by 3220

Special Issue Editor

Prof. Dr. Krzysztof Strzelec

E-Mail Website
Guest Editor
Institute of Polymer & Dye Technology, Faculty of Chemistry, Lodz University of Technology, Lodz, Poland
Interests: functional polymer materials; modification of polymers; polymer composites; self-repairing polymers; polymer foams
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Bio-based materials are made from natural polymers and represent renewable and environmentally friendly alternatives to widely used polymeric materials made from non-renewable fossil resources. Biopolymer foams and bio-based composite foams are an important focus of research. Their good mechanical and insulation properties increase attention for their potential in a wide variety of applications—for example, where ultralow density and high surface area, as well as thermal insulation, gas adsorption, energy storage, and selective liquid absorption are required. The use of bio-based raw materials and functionalized, reinforced bio-fillers may improve the mechanical and physical properties of composite foams and increase their biodegradability. Owing to these beneficial effects, the use of bio-based materials for the production of environmentally friendly composite foams will promote new application paths for the conversion of agricultural waste into useful resources for creating a new class of green materials.

Bio-aerogels are new materials based on renewable resources such as cellulose, tannin, lignin, chitosan, alginate, pectin, polysaccharides, proteins, and nucleic acids. Due to their outstanding properties (e.g., low density and very high specific surface area), they have great potential for a wide range of applications in fields such as biomedicine, pharmaceutical, biotechnology, cosmetics, and food, and they can be used in areas typical for classic aerogels (i.e., thermal and acoustic insulation, filtration, oil–water separation, absorption and adsorption, catalyst support and ion exchange media, fuel cells, and capacitors).

This present Special Issue, “Recent Advances in the Synthesis and Application of Bio-Based Foams and Aerogels”, considers recent research on advanced biopolymer foams and aerogels. Of special interest is research focused on new formulations and technologies that aim to produce improved cellular materials, as well as those related to the analysis of foaming mechanisms that use different conventional and non-conventional experimental techniques.

It is my pleasure to invite you to submit a manuscript to this Special Issue. Full papers, communications, and reviews are all welcome.

Prof. Dr. Krzysztof Strzelec
Guest Editor

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

  • bio-based foams and aerogels, synthesis and applications
  • porous composite materials based on renewable raw materials
  • foaming mechanisms
  • drying processes for aerogels production
  • modification of biopolymers used for the synthesis of aerogels
  • structure–property relationships, cellular structure
  • functionalization of biopolymer foams and aerogels
  • biodegradable and sustainable polymeric foam materials
  • bio-based foams processing techniques
  • polymer matrices for bio-based foam composites
  • modification of bio-fillers

Published Papers (2 papers)

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Research

17 pages, 4717 KiB  
Article
The Effect of a Chemical Foaming Agent and the Isocyanate Index on the Properties of Open-Cell Polyurethane Foams
by Klaudia Kamińska, Mateusz Barczewski, Maria Kurańska, Elżbieta Malewska, Krzysztof Polaczek and Aleksander Prociak
Materials 2022, 15(17), 6087; https://doi.org/10.3390/ma15176087 - 2 Sep 2022
Cited by 4 | Viewed by 1474
Abstract
This article presents an ecological approach based on climate neutrality to the synthesis of open-cell polyurethane foams with modified used cooking rapeseed oils. Water was used as a chemical blowing agent in the amount of 20–28 wt.% in relation to the weight of [...] Read more.
This article presents an ecological approach based on climate neutrality to the synthesis of open-cell polyurethane foams with modified used cooking rapeseed oils. Water was used as a chemical blowing agent in the amount of 20–28 wt.% in relation to the weight of the bio-polyol. The influence of water on the physical and mechanical properties of the synthesized foams was investigated. The resultant porous materials were tested for the content of closed cells, cell structure, apparent density, thermal conductivity, compressive strength, and dimensional stability. It was found that the apparent density decreased in the range of 11–13 kg/m3 when the amount of the foaming agent was increased. In the next step, a foam with a water content of 22% was selected as having the most favorable physico–mechanical properties among all the foams with various water contents. The isocyanate index of the selected foam was then changed from 0.6 to 1.1 and it was observed that the compressive strength increased by an average of 10 kPa. The thermal conductivity coefficients of the final materials with different water contents and isocyanate indices were comparable and in the range of 40–43 mW/m·K. Full article
(This article belongs to the Special Issue Recent Advances in the Synthesis and Application of Bio-Based Foams and Aerogels)
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35 pages, 6456 KiB  
Article
Adsorption of Non-Steroidal Anti-Inflammatory Drugs on Alginate-Carbon Composites—Equilibrium and Kinetics
by Małgorzata Wasilewska and Anna Deryło-Marczewska
Materials 2022, 15(17), 6049; https://doi.org/10.3390/ma15176049 - 1 Sep 2022
Cited by 12 | Viewed by 1419
Abstract
In this work, alginate–carbon composites with different active carbon content were synthesized and studied by various techniques. The obtained materials can be used as adsorbents in the processes of removing organic pollutants from water. In this study, the effect of the immobilization of [...] Read more.
In this work, alginate–carbon composites with different active carbon content were synthesized and studied by various techniques. The obtained materials can be used as adsorbents in the processes of removing organic pollutants from water. In this study, the effect of the immobilization of activated carbon in calcium alginate was investigated. Textural properties were determined by measuring low-temperature nitrogen adsorption/desorption isotherms. The largest specific surface area was recorded for ALG_C8 and amounted to 995 m2/g. The morphology of alginate materials was determined on the basis of scanning electron microscopy. The adsorption properties were estimated based on the measurements of equilibrium and adsorption kinetics. The highest sorption capacities were 0.381 and 0.873 mmol/g for ibuprofen and diclofenac, respectively. The generalized Langmuir isotherm was used to analyze the equilibrium data. A number of equations and kinetic models were used to describe the adsorption rate data, including first (FOE) and second (SOE) order kinetic equations, 1,2-mixed-order kinetic equation (MOE), fractal-like MOE equation (f-MOE), multi-exponential equation (m-exp), in addition to diffusion models: intraparticle diffusion model (IDM) and pore diffusion model (PDM). Thermal stability was determined on the basis of data from thermal analysis in an atmosphere of synthetic air. Full article
(This article belongs to the Special Issue Recent Advances in the Synthesis and Application of Bio-Based Foams and Aerogels)
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