Functional nanocomposite aerogels based on nanocrystalline cellulose for selective oil/water separation and antibacterial applications

Zhang, Yan; Yin, Maoli; Lin, Xinghuan; Ren, Xiaofeng; Huang, Tung‐Shi; Kim, Ick Soo

doi:10.1016/j.cej.2019.04.075

Cited by 98 publications

(23 citation statements)

References 44 publications

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“…[54,56] Cellulose can be extracted from lignocellulose by acid hydrolysis, enzymatic hydrolysis, mechanical refining, solvent extraction, and oxidation. [57][58][59][60][61][62][63][64] Nowadays, the advantages of low-cost, non-toxic, good biocompatibility, and biodegradability make cellulose widely used in many fields such as mechanical reinforcement materials, [65][66][67][68][69][70] oil-water separation materials, [70][71][72][73][74][75][76] adsorption materials, [77][78][79] medical slow-release materials, [80][81][82][83] and optoelectronic materials. [84][85][86][87][88][89][90][91][92][93] Thus, cellulose has been recognized as the main raw material for the energy and chemical industry in the future.…”

Section: Cellulosementioning

confidence: 99%

Chiral Photonic Liquid Crystal Films Derived from Cellulose Nanocrystals

Duan

Cheng

Wang

et al. 2021

Small

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As a nanoscale renewable resource derived from lignocellulosic materials, cellulose nanocrystals (CNCs) have the features of high purity, high crystallinity, high aspect ratio, high Young's modulus, and large specific surface area. The most interesting trait is that they can form the entire films with bright structural colors through the evaporation‐induced self‐assembly (EISA) process under certain conditions. Structural color originates from micro‐nano structure of CNCs matrixes via the interaction of nanoparticles with light, rather than the absorption and reflection of light from the pigment. CNCs are the new generation of photonic liquid crystal materials of choice due to their simple and convenient preparation processes, environmentally friendly fabrication approaches, and intrinsic chiral nematic structure. Therefore, understanding the forming mechanism of CNCs in nanoarchitectonics is crucial to multiple fields of physics, chemistry, materials science, and engineering application. Herein, a timely summary of the chiral photonic liquid crystal films derived from CNCs is systematically presented. The relationship of CNC, structural color, chiral nematic structure, film performance, and applications of chiral photonic liquid crystal films is discussed. The review article also summarizes the most recent achievements in the field of CNCs‐based photonic functional materials along with the faced challenges.

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Section: Cellulosementioning

confidence: 99%

Chiral Photonic Liquid Crystal Films Derived from Cellulose Nanocrystals

Duan

Cheng

Wang

et al. 2021

Small

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“…A bottom-up assembly process is commonly used for the preparation of superhydrophobic aerogels [ 19 , 20 ]. So far, a variety of superhydrophobic aerogels have been developed, including silica-based aerogels [ 21 , 22 ], carbon-based aerogels [ 23 , 24 , 25 , 26 ], cellulose-based aerogels [ 27 , 28 , 29 , 30 , 31 , 32 ], and boron nitride aerogels [ 33 ], etc. Among them, the cellulose aerogel has been considered as the most promising aerogel.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Superhydrophobic Cross-Linked Nanocellulose Aerogels for Oil–Water Separation

et al. 2021

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A facile and environmental-friendly approach was developed for the preparation of the cross-linked nanocellulose aerogel through the freeze-drying process and subsequent esterification. The as-prepared aerogel had a three-dimensional cellular microstructure with ultra-low density of 6.05 mg·cm−3 and high porosity (99.61%). After modifying by chemical vapor deposition (CVD) with hexadecyltrimethoxysilane (HTMS), the nanocellulose aerogel displayed stable super-hydrophobicity and super-oleophilicity with water contact angle of 151°, and had excellent adsorption performance for various oil and organic solvents with the adsorption capacity of 77~226 g/g. Even after 30 cycles, the adsorption capacity of the nanocellulose aerogel for chloroform was as high as 170 g/g, indicating its outstanding reusability. Therefore, the superhydrophobic cross-linked nanocellulose aerogel is a promising oil adsorbent for wastewater treatment.

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“…Due to its special structural and functional properties, such as high-specific surface area, open pore system, biodegradability and biocompatibility, cellulose hydrogels and aerogels can be used in food, pharmaceutical, cosmetic, environment, and biomedical industrial sectors as carriers of bioactive compounds [ 16 ] and drugs [ 17 , 18 ], as a tissue engineering substrate for cultivating organs/tissues/cells [ 19 ], as a safety bio-packaging [ 20 ] and thermo- [ 21 ] and electromagnetic insulation materials [ 20 ], and as good adsorbents for water purification [ 22 , 23 , 24 ] and oil/water separation processes [ 25 ]. More examples of the applications of cellulose-based hydrogels and aerogels can be found in recent reviews [ 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Cellulose-Based Hydrogels and Aerogels Embedded with Silver Nanoparticles: Preparation and Characterization

Vasil’kov

Rubina

Naumkin

et al. 2021

Gels

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The paper presents the preparation and characterization of novel composite materials based on microcrystalline cellulose (MCC) with silver nanoparticles (Ag NPs) in powder and gel forms. We use a promising synthetic conception to form the novel composite biomaterials. At first MCC was modified with colloidal solution of Ag NPs in isopropyl alcohol prepared via metal vapor synthesis. Then Ag-containing MCC powder was used as precursor for further preparation of the gels. The hydrogels were prepared by dissolving pristine MCC and MCC-based composite at low temperatures in aqueous alkali solution and gelation at elevated temperature. To prepare aerogels the drying in supercritical carbon dioxide was implemented. The as-prepared cellulose composites were characterized in terms of morphology, structure, and phase composition. Since many functional properties, including biological activity, in metal-composites are determined by the nature of the metal-to-polymer matrix interaction, the electronic state of the metal was carefully studied. The studied cellulose-based materials containing biologically active Ag NPs may be of interest for use as wound healing or water-purification materials.

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Functional nanocomposite aerogels based on nanocrystalline cellulose for selective oil/water separation and antibacterial applications

Cited by 98 publications

References 44 publications

Chiral Photonic Liquid Crystal Films Derived from Cellulose Nanocrystals

Chiral Photonic Liquid Crystal Films Derived from Cellulose Nanocrystals

Facile Fabrication of Superhydrophobic Cross-Linked Nanocellulose Aerogels for Oil–Water Separation

Cellulose-Based Hydrogels and Aerogels Embedded with Silver Nanoparticles: Preparation and Characterization

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