Toward high-performance fibrillated cellulose-based air filter via constructing spider-web-like structure with the aid of TBA during freeze-drying process

Lu, Zhaoqing; Su, Zhiping; Song, Shunxi; Zhao, Yongsheng; Ma, Shanshan; Zhang, Meiyun

doi:10.1007/s10570-017-1561-x

Cited by 37 publications

(33 citation statements)

References 36 publications

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“…Hence, a wide diversity of crystal morphologies can be observed during the solidification of a binary mixture of water/TBA [142]. Secondly, TBA molecules can attach to the surface of CNFs through hydrogen-bonding interactions which leads to hydrophobic surfaces of the fibrils by introducing tert-butyl groups [143]. This can considerably disturb the redistribution of solid particles by the solidification front.…”

Section: Suspending Fluidmentioning

confidence: 99%

Ice-Templated Porous Nanocellulose-Based Materials: Current Progress and Opportunities for Materials Engineering

et al. 2018

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Nanocelluloses (cellulose nanocrystals, CNCs, or cellulose nanofibrils, CNFs) are the elementary reinforcing constituents of plant cell walls. Because of their pronounced slenderness and outstanding intrinsic mechanical properties, nanocelluloses constitute promising building blocks for the design of future biobased high-performance materials such as nanocomposites, dense and transparent films, continuous filaments, and aerogels and foams. The research interest in nanocellulose-based aerogels and foams is recent but growing rapidly. These materials have great potential in many engineering fields, including construction, transportation, energy, and biomedical sectors. Among the various processing routes used to obtain these materials, ice-templating is one of the most regarded, owing to its simplicity and versatility and the wide variety of porous materials that this technique can provide. The focus of this review is to discuss the current state of the art and understanding of ice-templated porous nanocellulose-based materials. We provide a review of the main forming processes that use the principle of ice-templating to produce porous nanocellulose-based materials and discuss the effect of processing conditions and suspension formulation on the resulting microstructures of the materials.

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Section: Suspending Fluidmentioning

confidence: 99%

Ice-Templated Porous Nanocellulose-Based Materials: Current Progress and Opportunities for Materials Engineering

et al. 2018

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“…When the fiber diameter is reduced to the nanoscale size, the filtration efficiency of the fiber‐based filter can be greatly improved due to the increased contact probability between the aerosol particles and the fiber surface. [ 24–26 ] The microscopic morphology of BC is an ultra‐fine three‐dimensional nano network structure, which shows great superiority for air filter. In addition, BC is a porous aerogel, which also possesses many superior advantages, such as large specific surface area, interconnected porous structure and flexible functions.…”

Section: Introductionmentioning

confidence: 99%

Rational design of bacterial cellulose‐based air filter with antibacterial activity for highly efficient particulate matters removal

et al. 2021

Nano Select

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Multifunctional air filters with efficient particulate matters (PMs) removal, low respiratory resistance and prevention harmful substances are highly demanded. Bacterial cellulose (BC) air filter can capture PMs and separate them from the airflow; however, the dense network structure sacrifices the air permeability. Herein, we incorporated silver nanowires (AgNW) to BC filter through in‐situ cultivation method to prepare a new air filter. The addition of AgNW endows BC filter with antibacterial activity and increases the porosity and air permeability. Surprisingly, AgNW incorporation achieves high‐efficiency filtration through electrostatic adsorption. The filtration efficiency of the BC/AgNW composite filter paper for PM2.5 and PM10 is as high as 99.7% and 99.8%, respectively, that are on par with commonly used 3 M masks on the market. The pressure drop is 123 Pa, which can meet market demand with satisfaction. In addition, the tailor‐made BC/AgNW owns efficient antibacterial potency to keep the human body from infecting germs and other interferences. Overall, this work indicated that the versatile composite air filter paper is promising for various applications in the environmental field and the critical need for human health.

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“…An air filter with spider‐web‐like structures based on fibrillated cellulose was fabricated by freeze‐drying, and exhibited a filtration efficiency of 99% for PM model particles with diameters of 300 nm. [ 222 ] Due to the lower pressure drop, CNF aerogel‐containing filters also have the potential to reduce energy consumption in air filtration systems. [ 213 ]…”

Section: Construction and Applications Of Biopolymer‐based Materials mentioning

confidence: 99%

Biopolymer Nanoscale Assemblies as Building Blocks for New Materials: A Review

Pei

Wang

Tang

et al. 2021

Adv Funct Materials

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Biopolymers, a class of fascinating polymers from biomass provide sustainability, biodegradability, availability, biocompatibility, and unique properties. A ubiquitous feature of biopolymers is their hierarchical structure, with the presence of well‐organized structures from the nanoscale to macroscopic dimensions. This structural organization endows biopolymers with toughness, defect resistance, and bucking adaptability. To retain these inherent structural features, nano‐structural assemblies isolated from biomass have been applied as building blocks to construct new biopolymer‐based materials. This top‐down processing strategy is distinct from the more traditional molecular‐level bottom‐up design and assembly approach for new materials. In this review, the hierarchical structures of several representative biopolymers (cellulose, chitin, silk, collagen) are introduced with a focus on these nanoscale building blocks, as well as highlighting the similarities and differences in the respective chemistries and structures. Recent progress in production strategies of these natural building blocks are summarized, covering methods and treatments used for isolations. Finally, approaches and emerging applications of biopolymer‐based materials using these natural nano‐ and meso‐scale building blocks are demonstrated in areas of biomedicine, electronics, environmental, packaging, sensing, foods, and cosmetics.

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Toward high-performance fibrillated cellulose-based air filter via constructing spider-web-like structure with the aid of TBA during freeze-drying process

Cited by 37 publications

References 36 publications

Ice-Templated Porous Nanocellulose-Based Materials: Current Progress and Opportunities for Materials Engineering

Ice-Templated Porous Nanocellulose-Based Materials: Current Progress and Opportunities for Materials Engineering

Rational design of bacterial cellulose‐based air filter with antibacterial activity for highly efficient particulate matters removal

Biopolymer Nanoscale Assemblies as Building Blocks for New Materials: A Review

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