Fabrication and Characterization of Cellulose Nanofiber Aerogels Prepared via Two Different Drying Techniques

Wang, Zhe; Zhu, Wenkai; Huang, Runzhou; Zhang, Yang; Jia, Chong; Zhao, Hua; Chen, Wei; Xue, Yuanyuan

doi:10.3390/polym12112583

Cited by 36 publications

(15 citation statements)

References 34 publications

(34 reference statements)

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“…Further, the sc-CO 2 drying process produces aerogels with smaller macropores than those obtained via FD. In terms of the mechanical properties, the compressive strength of the CNF aerogel product obtained via freeze drying is greater than that obtained via sc-CO 2 drying due to the formation of the ice crystals that enhance the internal structure of the aerogel via cellulose aggregation [ 104 ]. Moreover, the FD method is more favorable due to its ease of application, environmental friendliness, and cost effectiveness.…”

Section: Preparation Of Porous Polysaccharidesmentioning

confidence: 99%

“…In addition, the drying efficiency during aerogel formation can be observed by examining the developing morphology over several works. Such studies clearly indicate that the structure can be destroyed during the drying-adsorption cycle, particularly when the FD methods are used, due to the rapid change of liquid to crystal form [ 104 ]. In contrast, the sc-CO 2 drying can maintain the original pore size of the aerogel [ 25 , 103 ].…”

Section: Characterization Of the Polysaccharide Aerogelsmentioning

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: Preparation Of Porous Polysaccharidesmentioning

confidence: 99%

Section: Characterization Of the Polysaccharide Aerogelsmentioning

confidence: 99%

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

Muhammad¹,

Lee²,

Shin³

et al. 2021

Polymers

View full text Add to dashboard Cite

show abstract

“…Since the discovery of the supercritical state in the 19th century, various studies have been carried out, and it has been applied and popularized in petrochemical and environmental protection [ 1 ], thermal power generation [ 2 ], food and drug industries [ 3 , 4 ], biomedical applications [ 5 , 6 , 7 ], material preparation [ 8 , 9 ], etc. This has gradually led to the formation of supercritical fluid extraction technology, supercritical fluid chromatography technology, supercritical dyeing technology, and supercritical drying technology, etc.…”

Section: Introductionmentioning

confidence: 99%

A Bibliometric Analysis and Review of Supercritical Fluids for the Synthesis of Nanomaterials

Zhang

Xing

et al. 2021

Nanomaterials

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Since the 1990s, supercritical fluids for the synthesis of nanomaterials have been paid more and more attention by researchers and have gradually become one of the most important ways to prepare nanomaterials. In this study, literature data on “supercritical fluids for the synthesis of nanomaterials” from 1998 to 2020 were obtained from the Web of Science database, and the data were processed and analyzed by the bibliometric method combined with Microsoft office 2019, Origin 2018, VOSviewer, and other software, so as to obtain the research status and development trend of “supercritical fluids for the synthesis of nanomaterials”. The results show that since literature on “supercritical fluids for the synthesis of nanomaterials” appeared for the first time in 1998, the number of articles published every year has risen. In terms of this field, China has become the second-largest publishing country after the United States, and China and the United States display a lot of cooperation and exchanges in this field. “Supercritical CO2”, “supercritical water”, “supercritical antisolvent”, “surface modification”, and so on have become the research hotspots of “supercritical fluids for the synthesis of nanomaterials”.

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“…Thus, the aqueous medium maintains the dispersion and colloidal individualization of NFC in water [ 13 ]. According to Wang and co-workers [ 14 ], compared to other drying processes (like CO 2 drying), aerogels obtained from the liquid nitrogen freeze-drying may present higher shrinkage, higher compression strength, lower specific surface area, higher pore volume, and higher density.…”

Section: Introductionmentioning

confidence: 99%

Nanofibrillated Cellulose-Based Aerogels Functionalized with Tajuva (Maclura tinctoria) Heartwood Extract

et al. 2021

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Aerogels are 3-D nanostructures of non-fluid colloidal interconnected porous networks consisting of loosely packed bonded particles that are expanded throughout their volume by gas and exhibit ultra-low density and high specific surface area. Cellulose-based aerogels can be obtained from hydrogels through a drying process, replacing the solvent (water) with air and keeping the pristine three-dimensional arrangement. In this work, hybrid cellulose-based aerogels were produced and their potential for use as dressings was assessed. Nanofibrilated cellulose (NFC) hydrogels were produced by a co-grinding process in a stone micronizer using a kraft cellulosic pulp and a phenolic extract from Maclura tinctoria (Tajuva) heartwood. NFC-based aerogels were produced by freeze followed by lyophilization, in a way that the Tajuva extract acted as a functionalizing agent. The obtained aerogels showed high porosity (ranging from 97% to 99%) and low density (ranging from 0.025 to 0.040 g·cm−3), as well a typical network and sheet-like structure with 100 to 300 μm pores, which yielded compressive strengths ranging from 60 to 340 kPa. The reached antibacterial and antioxidant activities, percentage of inhibitions and water uptakes suggest that the aerogels can be used as fluid absorbers. Additionally, the immobilization of the Tajuva extract indicates the potential for dentistry applications.

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Fabrication and Characterization of Cellulose Nanofiber Aerogels Prepared via Two Different Drying Techniques

Cited by 36 publications

References 34 publications

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

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

A Bibliometric Analysis and Review of Supercritical Fluids for the Synthesis of Nanomaterials

Nanofibrillated Cellulose-Based Aerogels Functionalized with Tajuva (Maclura tinctoria) Heartwood Extract

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