Nanocellulose Aerogels
Nanocellulose Aerogels - Related Videos
08:13
Preparation of Biopolymer Aerogels Using Green Solvents
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Cited by 44 •
2016
A new way for the production of biopolymer-based aerogels by carbon dioxide (CO2) induced gelation is shown. The technique utilizes pressurized carbon dioxide (5 MPa) for the production of biopolymer hydrogels and supercritical CO2 (12 MPa) to convert gels into aerogels. The only solvents needed besides CO2 are water and ethanol.
02:52
Preparation of Bacterial Nanocellulose Pellicles from Cellulose-Producing Bacteria
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2025
Source: Arias, S. L., et al. Fabrication of a Functionalized Magnetic Bacterial Nanocellulose with Iron Oxide Nanoparticles. J. Vis. Exp. (2016).This video demonstrates the production of nanocellulose by culturing cellulose-producing bacteria in a nutrient medium containing mannitol. The bacteria metabolize mannitol into glucose, which is then polymerized and extruded as glucan chains that crystallize into cellulose sheets, forming a three-dimensional matrix at the air–liquid interface. The...
06:54
Preparing Silica Aerogel Monoliths via a Rapid Supercritical Extraction Method
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Cited by 26 •
2014
This article describes a rapid supercritical extraction method for fabricating silica aerogels. By utilizing a confined mold and hydraulic hot press, monolithic aerogels can be made in eight hours or less.
11:06
Encapsulating Cytochrome c in Silica Aerogel Nanoarchitectures without Metal Nanoparticles while Retaining Gas-phase Bioactivity
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Cited by 1 •
2016
This procedure describes how to encapsulate cytochrome c (cyt. c) in silica (SiO2) sol-gels, process these gels to form bioaerogels, and use these bioaerogels to rapidly recognize nitric oxide (NO) through a gas-phase reaction. This type of protocol may aid in the future development of biosensors or other bioanalytical devices.
11:26
Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation
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Cited by 13 •
2014
The objective of this research was to form synthetic plant cell wall tissue using layer-by-layer assembly of nanocellulose fibrils and isolated lignin assembled from dilute aqueous suspensions. Surface measurement techniques of quartz crystal microbalance and atomic force microscopy were used to monitor the formation of the polymer-polymer nanocomposite material.
FAQs
Drying determines whether the three-dimensional nanocellulose network remains intact after liquid removal. Conditions must remove the liquid while preserving the assembled framework, because the resulting architecture controls density, porosity, and accessible surface area. Maintaining this structure is therefore central to producing an aerogel with the physical characteristics needed for adsorption, insulation, sensing, or remediation.
Cellulose nanofibers or nanocrystals serve as the building units of the aerogel framework. Their assembly creates the interconnected three-dimensional structure rather than a compact, nonporous solid. The resulting organization gives the material its low density, high porosity, and large surface area, which are important for interactions with surrounding substances and for incorporating additional functional components.
Surface functionalization changes the chemistry presented at the aerogel interface. Because the surface can be tailored, the material may be adapted for different interactions or functions, while incorporated components can add further capabilities. This chemical flexibility helps connect the same porous cellulose-based framework to applications such as adsorption, catalysis, sensing, and environmental remediation.
High porosity creates extensive internal space, while a large surface area provides more interface for chemical or physical interactions. Together, these characteristics help explain why nanocellulose aerogels are investigated for adsorption, catalysis, sensing, and pollutant-related remediation. Their low density also supports interest in thermal insulation, where limiting material mass is relevant to the material design.
Preparation begins with a suspension of nanocellulose, which is then gelled to assemble the cellulose building units into a three-dimensional network. The gel undergoes drying that removes liquid while preserving this framework. Researchers can subsequently tailor surface chemistry through functionalization or incorporate other components, depending on the intended material properties and application.
The porous structure supports several application areas. Adsorption uses the available surface and internal space, while catalysis can benefit from a structured material that accommodates active chemical functionality. The same platform is also explored for sensing, thermal insulation, and environmental remediation. Functionalization or component incorporation can help align the aerogel with a particular use.
Their cellulose origin gives nanocellulose aerogels a renewable materials basis, which is important when researchers seek alternatives to some petroleum-derived porous materials. This sustainability context complements their technical properties, including low density, high porosity, and large surface area. Chemistry therefore links resource choice with structural design and with applications in remediation, insulation, sensing, adsorption, and catalysis.