Mechanically Strengthened Aerogels through Multiscale, Multicompositional, and Multidimensional Approaches: A Review

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(18)

Published: Nov. 2, 2023

Abstract In recent decades, aerogels have attracted tremendous attention in academia and industry as a class of lightweight porous multifunctional nanomaterial. Despite their wide application range, the low mechanical durability hinders processing handling, particularly applications requiring complex physical structures. “Mechanically strengthened aerogels” emerged potential solution to address this drawback. Since first report on 1931, various modified synthesis processes been introduced last few decades enhance aerogel strength, further advancing scope. This review summarizes state‐of‐the‐art developments mechanically through multicompositional multidimensional approaches. Furthermore, new trends future directions for prevailed commercialization plastic materials are discussed.

Language: Английский

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Sodium alginate/ Al2O3 fiber nanocomposite aerogel with thermal insulation and flame retardancy properties

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 489, P. 151223 - 151223

Published: April 16, 2024

Language: Английский

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Fully biobased thermal insulating aerogels with superior fire-retardant and mechanical properties

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 495, P. 153587 - 153587

Published: June 29, 2024

Biomass-based aerogels offer a promising potential as alternatives to plastic-based foams for thermal insulation applications. However, their inherent flammability has hindered practical usage. In this work, we addressed issue by employing layer-by-layer assembly technique deposit two oppositely charged biobased materials, namely phytic acid and chitosan, onto fully aerogel system. These were fabricated using cellulose filaments chitosan cross-linked with citric acid, resulting in mechanically robust 3D structure. The synergistic effects of the deposited significantly enhanced fire resistance mechanical strength. developed six bilayer depositions (LBL6), showed an outstanding peak heat release rate (pHRR) 6.0 kW.m−2, total (THR) 0.4 MJ.m−2, substantially lower than previously cellulose-based foams. LBL6 also demonstrated immediate self-extinguishing behaviour, boasting impressive limiting oxygen index (LOI) value 63 %, which is highest reported aerogel. Furthermore, exhibited superior Young's modulus up 4.5 MPa, surpassing flame-retardant aerogels. Additionally, they excelled properties, conductivity less 38.2 mW·m−1·K−1, placing them same range as, or even than, commercially available insulators. Given simplicity development process well-known advantages completely system, our present sustainable environmentally friendly alternative current commercial insulators that are derived from petroleum-based materials.

Language: Английский

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Cellulose and nanocellulose aerogels, their preparation methods, and potential applications: a review

Cellulose, Journal Year: 2024, Volume and Issue: 31(4), P. 2001 - 2029

Published: Feb. 2, 2024

Language: Английский

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Cellulose from the banana stem: optimization of extraction by response surface methodology (RSM) and charaterization

Heliyon, Journal Year: 2022, Volume and Issue: 8(12), P. e11845 - e11845

Published: Dec. 1, 2022

Cellulose was extracted from the banana stem by chemical method and factors affecting extraction process such as concentration of NaOH H2O2, well assisted microwave time were investigated. Design-Expert software with Response Surface Methodology used in modeling optimization cellulose process. The results XRD, FT-IR, SEM also to determine physicochemical properties obtained stem. showed efficiency high applicability create valuable industrial products.

Language: Английский

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Cellulose/Salep-based intelligent aerogel with red grape anthocyanins: Preparation, characterization and application in beef packaging

Food Chemistry, Journal Year: 2023, Volume and Issue: 425, P. 136493 - 136493

Published: June 1, 2023

Language: Английский

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Thermal Insulation Performance of Aerogel Nano-Porous Materials: Characterization and Test Methods

Gels, Journal Year: 2023, Volume and Issue: 9(3), P. 220 - 220

Published: March 14, 2023

Due to the extremely high porosity and low density of nano-porous thermal insulation materials, characteristic size pores inside materials solid skeleton structure are on nanometer scale, which leads obvious nanoscale effect heat transfer law aerogel materials. Therefore, characteristics existing mathematical models for calculating conductivity various modes at need be summarized in detail. Moreover, order verify accuracy calculation model correct experimental data required modify model. Because medium is involved radiation transfer, test methods have a large error, brings great difficulties design In this paper, mechanism, characterization methods, discussed. The main contents review as follows. first part introduces structural specific application environment aerogel. second part, analyzed. third summarized. fourth fifth gives brief conclusion prospect.

Language: Английский

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Renewable biomass-based aerogels: from structural design to functional regulation

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(14), P. 7489 - 7530

Published: Jan. 1, 2024

Global population growth and industrialization have exacerbated the nonrenewable energy crises environmental issues, thereby stimulating an enormous demand for producing environmentally friendly materials. Typically, biomass-based aerogels (BAs), which are mainly composed of biomass materials, show great application prospects in various fields because their exceptional properties such as biocompatibility, degradability, renewability. To improve performance BAs to meet usage requirements different scenarios, a large number innovative works past few decades emphasized importance micro-structural design regulating macroscopic functions. Inspired by ubiquitous random or regularly arranged structures materials nature ranging from micro meso macro scales, constructing microstructures often corresponds completely functions even with similar biomolecular compositions. This review focuses on preparation process, concepts, regulation methods, synergistic combination chemical compositions porous perspective gel skeleton pore structure. It not only comprehensively introduces effect physical BAs, but also analyzes potential applications corresponding thermal management, water treatment, atmospheric harvesting, CO

Language: Английский

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Superwetting PVA/cellulose aerogel with asymmetric structure for oil/water separation and solar-driven seawater desalination

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 476, P. 135131 - 135131

Published: July 6, 2024

Language: Английский

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Controlled porosity intelligent aerogel based on chitosan nanofiber, anthocyanins and starch nanoparticles: Preparation, characterization and application in monitoring food spoilage

Food Hydrocolloids, Journal Year: 2024, Volume and Issue: 156, P. 110261 - 110261

Published: June 3, 2024

Language: Английский

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