Directionally-Grown Carboxymethyl Cellulose/Reduced Graphene Oxide Aerogel with Excellent Structure Stability and Adsorption Capacity

Zhao, Mingshan; Zhang, Sufeng; Fang, Guigan; Huang, Chen; Wu, Ting

doi:10.3390/polym12102219

Cited by 31 publications

(22 citation statements)

References 40 publications

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“…Meanwhile, the addition of graphene oxide (GO) or silver-loaded titanium dioxide (TiO 2 ) to a cellulose composite matrix has been shown to increase the thickness and decrease the pore size. This is due to the adsorption of the GO or TiO 2 into the pores of the matrix [ 66 , 67 ]. Similar results were observed during the addition of the antibacterial agent, N-halamine, into the chitosan–chitin aerogel, whereby the resultant thickening of the sheets and reduction in the pore size lead to a gradual decrease in the void volume fraction within the aerogels [ 68 ].…”

Section: Porous Polysaccharidesmentioning

confidence: 99%

“…The chemical modification of cellulose can be performed via the processes of etherification, esterification, oxidation, or grafting with various ligands. For example, cellulose has been modified by dissolving in NaOH/urea/water, and crosslinking with N , N ′-methylene bisacrylamide or graphene oxide [ 67 , 78 , 79 ]. For antimicrobial cellulose, particularly for use in fibers and fabrics, copper (Cu), zinc (Zn), or noble metals such as silver (Ag), gold (Au), and platinum (Pt) are incorporated [ 60 , 80 ].…”

Section: Preparation Of Porous Polysaccharidesmentioning

confidence: 99%

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Recent Progress in Polysaccharide Aerogels: Their Synthesis, Application, and Future Outlook

Muhammad¹,

Lee²,

Shin³

et al. 2021

Polymers

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Porous polysaccharides have recently attracted attention due to their porosity, abundance, and excellent properties such as sustainability and biocompatibility, thereby resulting in their numerous applications. Recent years have seen a rise in the number of studies on the utilization of polysaccharides such as cellulose, chitosan, chitin, and starch as aerogels due to their unique performance for the fabrication of porous structures. The present review explores recent progress in porous polysaccharides, particularly cellulose and chitosan, including their synthesis, application, and future outlook. Since the synthetic process is an important aspect of aerogel formation, particularly during the drying step, the process is reviewed in some detail, and a comparison is drawn between the supercritical CO2 and freeze drying processes in order to understand the aerogel formation of porous polysaccharides. Finally, the current applications of polysaccharide aerogels in drug delivery, wastewater, wound dressing, and air filtration are explored, and the limitations and outlook of the porous aerogels are discussed with respect to their future commercialization.

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Section: Porous Polysaccharidesmentioning

confidence: 99%

Section: Preparation Of Porous Polysaccharidesmentioning

confidence: 99%

Recent Progress in Polysaccharide Aerogels: Their Synthesis, Application, and Future Outlook

Muhammad¹,

Lee²,

Shin³

et al. 2021

Polymers

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“…Aligned porous hybrid structures based on the NCs-GO/rGO building blocks exhibit promising potentials in environmental remediation applications with desirable superior absorption feature capacities, selectivity, and sustainability. ,, Figure displays the state-of-the-art of the most advanced NCs-GO/rGO hybrid aerogels, absorbents, and membranes with highly absorptive capacities fabricated by conventional and directional freeze casting drying techniques. ,,,,,− It is commonly known that the charged organic–inorganic species can be absorbed electrostatically via the absorbent charged sites. Accordingly, the NCs-GO/rGO hybrids with abundant functional groups in the basal-center-edges planes can act as superior absorption sites for various pollutants (heavy ions, oils, and chemical solvents).…”

Section: Nanocellulose-graphene Derivative Hybrid Materials and Their...mentioning

confidence: 99%

Section: Nanocellulose-graphene Derivative Hybrid Materials and Their...mentioning

confidence: 99%

Nanocellulose-Graphene Derivative Hybrids: Advanced Structure-Based Functionality from Top-down Synthesis to Bottom-up Assembly

Brakat

Zhu

2021

ACS Appl. Bio Mater.

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There is an emerging endeavor of advanced structure-based functionality in the next-generation advanced functional materials inspired by hierarchical architecture for future technical applications. This review provides an impressive range roadmap for constructing advanced functional materials based on the nanocellulose-graphene derivative hybrids, from the top-down synthesis of their hierarchical materials to the bottom-up assembly of their nanoscale building blocks. First, the roadmap started from the top-down synthesis routes of nanocellulose-graphene hierarchical materials into their derivatives, where the pristine properties of nanoscale building blocks are still accessible and processable. Then, the stable-strong synergistic interfacial interactions between nanocellulose chains and graphene derivative nanosheets are uniquely well-suited in this roadmap for constructing scalable hybrid materials with interesting emergent properties. After that, the roadmap presented the bottom-up assembly approaches of these versatile nanoscale building blocks through self-assembly, templating, and mimicking of the bioinspired hierarchical structures toward advanced functional materials. Thereafter, toward understanding the specificity, superiority, and functionality of such hybrid materials, the roadmap discussed the properties and potential applications so far. Finally, the roadmap pointed out the key challenges and future outlooks, paving the way for comprehensive understanding and ideal designing of hybrid structures from nanocellulose and graphene derivatives.

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“…Aerogel is a solid material with a nanoscale skeleton and nonporous network structures, such as silica aerogels [1], chitosan aerogels [2], polybenzoxazine aerogels [3], etc. Aerogel has the unique characteristics of low density [4], high specific surface area [5], high porosity [6,7], low thermal conductivity [8], excellent absorptive activity [9,10], etc. Owing to the versatile characteristics, aerogel has been widely studied and successfully applied in thermal insulation [11,12], catalyst carrier [13,14], air purification, and water treatment [15,16].…”

Section: Introductionmentioning

confidence: 99%

Constructing Cellulose Diacetate Aerogels with Pearl-Necklace-like Skeleton Networking Structure

Xiong

Zhang

et al. 2021

Gels

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Cellulose and its derivative aerogels have attracted much attention due to their renewable and biodegradable properties. However, the significant shrinkage in the supercritical drying process causes the relatively high thermal conductivity and low mechanical property of cellulose and its derivatives aerogels. Considering the pearl-necklace-like skeleton network of silica aerogels, which can improve thermal insulation property and mechanical property. Herein, we propose a new strategy for fabricating cellulose diacetate aerogels (CDAAs) with pearl-necklace-like skeletons by using tert-butanol (TBA) as exchange solvent after experiencing the freezing-drying course. CDAAs obtained have the low density of 0.09 g cm−3, the nanopore size in the range of 10–40 nm, the low thermal conductivity of 0.024 W m−1 K−1 at ambient conditions, and the excellent mechanical properties (0.18 MPa at 3% strain, 0.38 MPa at 5% strain). Ultimately, CDAAs with moderate mechanical property paralleled to cellulose-derived aerogels obtained from supercritical drying process are produced, only simultaneously owning the radial shrinkage of 6.2%. The facile method for fabricating CDAAs could provide a new reference for constructing cellulose/cellulose-derived aerogels and other biomass aerogels.

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Directionally-Grown Carboxymethyl Cellulose/Reduced Graphene Oxide Aerogel with Excellent Structure Stability and Adsorption Capacity

Cited by 31 publications

References 40 publications

Recent Progress in Polysaccharide Aerogels: Their Synthesis, Application, and Future Outlook

Recent Progress in Polysaccharide Aerogels: Their Synthesis, Application, and Future Outlook

Nanocellulose-Graphene Derivative Hybrids: Advanced Structure-Based Functionality from Top-down Synthesis to Bottom-up Assembly

Constructing Cellulose Diacetate Aerogels with Pearl-Necklace-like Skeleton Networking Structure

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