Preparations and characterisation of a nanosilver‐loaded aerogel based on nanocellulose

Zhang, Lin; Qun, LI; Duan, Linjuan; Liu, Rongrong

doi:10.1049/mnl.2019.0713

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…Biomass materials are highly favored due to the advantages of environmental friendliness and comprehensive sources. − It is well known that aerogels are characterized by low density, high porosity, and low thermal conductivity, − which provide a new alternative for traditional thermal insulation materials and have a great application prospect in the energy-saving building field. − The biomass aerogel combined with the advantages of biomass and aerogel can simultaneously meet the requirements of building new insulation materials for sustainable development; therefore, biomass aerogels with an environmentally friendly property and low thermal conductivity have been considered as a substitute for traditional insulation materials. − …”

Section: Introductionmentioning

confidence: 99%

Construction and Nanostructure of Chitosan/Nanocellulose Hybrid Aerogels

Zhang

Xiong

et al. 2021

Biomacromolecules

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Biomass aerogels have received extensive attention due to their unique natural characteristics. However, biomass-based chitosan aerogels are often confronted with the traditional issue concerning a weak skeleton structure, namely, the corresponding huge shrinkage for chitosan aerogels in the stage from the final gel to the aerogel. Herein, we put forward a new approach to enhance chitosan aerogels by introducing natural biomaterial cellulose nanocrystal (CNC). CNC is applied to connect/cross-link chitosan chains to form its networking construction through supramolecular interaction/physical entanglement, eventually realizing the enhancement of the chitosan aerogel network structure. Chitosan aerogels modified with CNC exhibit a high specific surface area of 578.43 cm2 g–1, and the pore size distribution is in the range of 20–60 nm, which is smaller than the mean free path of gas molecules (69 nm), triggering a “no convection” effect. Hence, the gaseous heat transfer of chitosan aerogel is effectively suppressed. Chitosan aerogels with the addition of CNC show an excellent thermal insulation property (0.0272 W m-1 K-1 at ambient condition) and an enhanced compressive strength (0.13 MPa at a strain of 3%). This improvement method of chitosan aerogel in enhancing the skeleton structure aspect provides a new kind of idea for strengthening the nanoscale morphology structure of biomass aerogels.

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Section: Introductionmentioning

confidence: 99%

Construction and Nanostructure of Chitosan/Nanocellulose Hybrid Aerogels

Zhang

Xiong

et al. 2021

Biomacromolecules

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Immobilization of silver nanoparticles on cellulose nanofibrils incorporated into nanofiltration membrane for enhanced desalination performance

Li²,

Chen³

et al. 2022

npj Clean Water

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Nanofiltration (NF) membranes circumventing global water scarcity with excellent separation and antibacterial performances are highly desirable for efficient water treatment but remain a great challenge. Herein, a nanofiltration membrane was fabricated by in situ immobilizing silver nanoparticles (AgNPs) on sulfated cellulose nanofibril incorporated during interfacial polymerization. AgNPs were confirmed to be uniformly distributed and in situ grown on sulfated cellulose nanofibril (SCNF) due to its abundant sulfate and hydroxyl groups by mixing them with anhydrous piperazine solution as inorganic phase and homophenyl chloride n-hexane solution as the organic phase on the surface of a polyethersulfone microporous membrane. The attributes of SCNF, excellent hydrophilicity, and highly negative charges enhanced both the rejection and water permeability. As the SCNF charge increased, the roughness of SCNF increased and the contact angle decreased, and the maximum values were 203 nm and 17.67°, respectively. Among all the composite NF membranes, H-SCNF/Ag-0.01 had better rejection of Na2SO4 and NaCl, with a maximum rejection of 97.11% and 32.55%, respectively. Meanwhile, it also maintained high water permeability. Antibacterial experiments indicated that the composite NF membrane had effective inhibition against Escherichia coli and exhibited an expected slow-release capability of Ag+, which made it have long-term antibacterial properties. It was estimated that the antibacterial effect could last for 90 days. This work demonstrated that AgNPs in situ immobilization on SCNF could be used as promising nanofillers for designing advanced functional NF membranes.

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Preparations and characterisation of a nanosilver‐loaded aerogel based on nanocellulose

Cited by 2 publications

References 37 publications

Construction and Nanostructure of Chitosan/Nanocellulose Hybrid Aerogels

Construction and Nanostructure of Chitosan/Nanocellulose Hybrid Aerogels

Immobilization of silver nanoparticles on cellulose nanofibrils incorporated into nanofiltration membrane for enhanced desalination performance

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