Fabrication of cellulose nanofiber-deposited cellulose sponge as an oil-water separation membrane

Halim, Abdul; Xu, Yinchao; Lin, Kuan-Hsuan; Kobayashi, Motoyoshi; Kajiyama, Mikio; Enomae, Toshiharu

doi:10.1016/j.seppur.2019.05.005

Cited by 67 publications

(20 citation statements)

References 64 publications

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“…The physical appearance of TOCNF after absorbing water was gel-like, whereas that of ACC-CNF after absorbing water was rubber-like. The swelling capacity of TOCNF and ACC-CNF was 2050% and 256%, respectively 10 . However, the absorption capacity did not agree with the contact angle qualitatively, as shown in Fig.…”

Section: Resultsmentioning

confidence: 96%

Biomimicking properties of cellulose nanofiber under ethanol/water mixture

Halim

Lin

Enomae

2020

Sci Rep

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The two types of cellulose nanofiber (CNF) surface characteristics were evaluated by oil contact angle under ethanol–water solution at several concentrations as well as in air. Wood pulp-based 2,2,6,6-tetramethylpiperidine-1-oxylradical (TEMPO)-oxidized cellulose nanofiber (TOCNF) sheets and bamboo-derived mechanical counter collision cellulose nanofiber (ACC-CNF) sheets were fabricated by casting followed by drying. The CNF shows underwater superoleophobic mimicking fish skin properties and slippery surface mimicking Nepenthes pitcher. The underwater superoleophobic properties of CNF was evaluated theoretically and experimentally. The theoretical calculation and experimental results of contact angle showed a large deviation. The roughness, zeta potential, and water absorption at different concentrations were key factors that determine the deviation. Antifouling investigation revealed that CNF was a good candidate for antifouling material.

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Section: Resultsmentioning

confidence: 96%

Biomimicking properties of cellulose nanofiber under ethanol/water mixture

Halim

Lin

Enomae

2020

Sci Rep

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“…Titanium oxide oil-water separation membranes achieved a separation of 99.2% 61 . Wood-free fiber-based 2,2,6,6-tetramethylpiperidine-1-oxyl oxidized cellulose nanofiber were used to increase the hydrophilicity and underwater oleophobicity of cellulose sponges, to achieve an oil-water separation efficiency of over 90% 62 . While effective, both sponges and oil-water separation filters previously developed cannot be injected in porous media (such as aquifers) to separate oil from water in the subsurface.…”

Section: Resultsmentioning

confidence: 99%

Selective solvent filters for non-aqueous phase liquid separation from water

Marshall

Estepa

Corradini

et al. 2020

Sci Rep

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Injectable filters permeable to water but impermeable to non-polar solvents were developed to contain non-aqueous phase liquids (NAPL) in contaminated aquifers, hence protecting downstream receptors during NAPL remediation. Filters were produced by injecting aqueous solutions of 0.01% chitosan, hydroxyethylcellulose and quaternized hydroxyethylcellulose into sand columns, followed by rinsing with water. Polymer sorption onto silica was verified using a quartz-crystal microbalance with dissipation monitoring. Fluorescence and gas chromatography mass spectroscopy showed low ppm range concentrations of non-polar solvents (e.g., hexane and toluene) in water eluted from the filters (in the absence of emulsifiers). The contact angles between polymer-coated surfaces and hexane or toluene were > 90°, indicating surface oleophobicity. Organic, polar solvents (e.g. tetrahydrofuran and tetrachloroethylene, TCE) were not separated from water. The contact angles between polymercoated surfaces and TCE was also > 90°. However, the contact area with polymer coated surfaces was greater for TCE than non-polar solvents, suggesting higher affinity between TCE and the surfaces. Emulsifiers can be used to facilitate NAPL extraction from aquifers. Emulsion separation efficiency depended on the emulsifier used. Emulsions were not separated with classical surfactants (e.g. Tween 20 and oleic acid) or alkaline zein solutions. Partial emulsion separation was achieved with humic acids and zein particles. Petroleum hydrocarbons (e.g. toluene) are common soil and groundwater contaminants because of their historical and current use in industry 1. Oil spills in surface waters can also occur during transport by boat, threatening surface water bodies and ecosystems in their proximity 2-4. In 1969, the oil well blowout in Santa Barbara, California released 4.1-4.6 million barrels of oil 5,6. Since then, American waters have been contaminated by more than 44 oil spills (each over 420,000 US gallons) 7. Spills have also occurred in Greece (where the Agia Zoni II released over 2,500 tonnes of oil in 2017 8), in India (where the Ennore spill released 160 tonnes of oil 9) and in east China (where the Sanchi oil tanker released 136,000 tonnes of natural-gas condensate in 2018 10). In addition to sorbents 11,12 , separation sponges have been developed to clean-up oil spills in surface waters. Separation sponges can be attached onto suction ports on boats, to selectively extract oil from surface waters 13. Oil-water separation sponges are produced using different methods, including dip coating, chemical vapor deposition, in situ chemical reaction, wet chemical reaction, thermal treatment, polymerization, electroless deposition, or carbonization 13. Different materials have been used to produce sponges for oil-water separation. For instance, graphene/polyurethane sponges have been obtained by in situ polymerization of N-methylpyrrolidone in the presence of graphene 14. These sponges have been used to selectively extract hexane, crude oil and engine oil flo...

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“…Besides, the practicality of these techniques only lies in oil droplets’ size < 150 µm or between 20 to 150 µm for unstable oil droplets [ 101 ]. Concerning environmental pollution, the highly porous, hydrophilic, and oleophobic in water atmosphere cellulose is utilized as the oil/water separation-RC membrane [ 103 ]. The wettability under oil/water is essential in oil/water separation membranes due to its application in a wet state.…”

Section: Regenerated Cellulose Productsmentioning

confidence: 99%

Regenerated Cellulose Products for Agricultural and Their Potential: A Review

et al. 2021

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Cellulose is one of the most abundant natural polymers with excellent biocompatibility, non-toxicity, flexibility, and renewable source. Regenerated cellulose (RC) products result from the dissolution-regeneration process risen from solvent and anti-solvent reagents, respectively. The regeneration process changes the cellulose chain conformation from cellulose I to cellulose II, leads the structure to have more amorphous regions with improved crystallinity, and inclines towards extensive modification on the RC products such as hydrogel, aerogel, cryogel, xerogel, fibers, membrane, and thin film. Recently, RC products are accentuated to be used in the agriculture field to develop future sustainable agriculture as alternatives to conventional agriculture systems. However, different solvent types and production techniques have great influences on the end properties of RC products. Besides, the fabrication of RC products from solely RC lacks excellent mechanical characteristics. Thus, the flexibility of RC has allowed it to be homogenously blended with other materials to enhance the final products’ properties. This review will summarize the properties and preparation of potential RC-based products that reflect its application to replace soil the plantation medium, govern the release of the fertilizer, provide protection on crops and act as biosensors.

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Fabrication of cellulose nanofiber-deposited cellulose sponge as an oil-water separation membrane

Cited by 67 publications

References 64 publications

Biomimicking properties of cellulose nanofiber under ethanol/water mixture

Biomimicking properties of cellulose nanofiber under ethanol/water mixture

Selective solvent filters for non-aqueous phase liquid separation from water

Regenerated Cellulose Products for Agricultural and Their Potential: A Review

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