Low temperature-resistant superhydrophobic and elastic cellulose aerogels derived from seaweed solid waste as efficient oil traps for oil/water separation

Dai, Qinglin; Li, Daohao; Sun, Yuanyuan; Wang, Hu; Lu, Yun; Yang, Dongjiang

doi:10.1016/j.chemosphere.2023.139179

Cited by 9 publications

(5 citation statements)

References 65 publications

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“…These variations could be attributed to the distinct densities and viscosities of the substances involved. 36,37 What's more, thanks to the larger pores of the substrate and less pore blockage, the adsorption capacity of HMF-0.3 showed an improvement compared to the previous report. 38,39 To normalize the adsorption capacity for density, the results were transformed into the adsorption volume (Figure 4c).…”

Section: ■ Results and Discussionmentioning

confidence: 76%

“…Various oils and solvents were tested in the adsorption experiments, revealing significant differences in solvent adsorption capacity, as illustrated in Figure b. These variations could be attributed to the distinct densities and viscosities of the substances involved. , What’s more, thanks to the larger pores of the substrate and less pore blockage, the adsorption capacity of HMF-0.3 showed an improvement compared to the previous report. , To normalize the adsorption capacity for density, the results were transformed into the adsorption volume (Figure c). The outcomes indicated that the absorbed liquid volumes were consistently around 130 mL/g for all substances, except for lubricating oil.…”

Section: Resultsmentioning

confidence: 93%

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Construction and Regulation of a Superhydrophobic Sponge via In Situ Anchoring of a Hyper-Cross-Linked Polymer for Efficient Oil/Water Separation

Xue,

Wang,

Man

et al. 2024

ACS Appl. Polym. Mater.

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In the ever-growing environmental concerns caused by crude oil spills and solvent discharges, our study pioneered an ingenious approach to fabricate superhydrophobic melamine formaldehyde (HMF) materials through in situ anchoring of a porous hyper-cross-linked polymer (HCP) and achieved stable integration of HCP on the MF surface by covalent bonds and hydrogen bonds instead of traditional adhesives. The resulting composite material exhibits exceptional performance with an oil adsorption capacity of 130 mL/g, a filtration/separation efficiency exceeding 99%, and remarkable environmental resistance and recyclability. The robust interfacial strength and high degree of cross-linking porous HCP facilitate tailorable design and easy adjustment of pore structures and ensure repeated use through simple squeezing. Notably, the hydrophobicity and porous structure of the sponge can be conveniently regulated by controlling the deposition amount of HCP, realizing a high adsorption capacity and/or efficient emulsion separation on demand. This study not only contributes to the advancement of wettability materials but also presents an efficient, versatile, and convenient method and toolbox to address diverse oil/water separation challenges, paving the way for sustainable environmental solutions and marking a significant stride toward a cleaner future.

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Section: ■ Results and Discussionmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 93%

Construction and Regulation of a Superhydrophobic Sponge via In Situ Anchoring of a Hyper-Cross-Linked Polymer for Efficient Oil/Water Separation

Xue,

Wang,

Man

et al. 2024

ACS Appl. Polym. Mater.

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“…Aerogels modified with methyltrimethoxysilane (MTMS) are hydrophobic, to improve the specificity for oil. Despite the excellent properties of aerogels, which include high porosity, low density, and high surface area [5], the mechanical properties of cellulose-based aerogels still need to be improved for use at high temperatures or organic solvent removal [6]. Little literature is available about the reuse of aerogels close to real-world conditions, namely the purification of oil from water and the multiple use of aerogels [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…A recent article mentions cyclic compression testing of nanofibrillated aerogels to evaluate the durability of samples after 50 compression-unloading cycles, but also uses non-oil-sorbed aerogels [12]. There are almost no studies attempting cyclic mechanical testing with oil or organic liquids, and there are a few studies in which aerogel is soaked in oil and mechanically squeezed in ethanol [13] to evaluate shape relaxation [6].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Cellulose Aerogel Composites with and without Crude Oil Filling

Paulauskiene,

Sirtaute,

Tadzijevas

et al. 2024

Gels

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Aerogels are an excellent alternative to traditional oil absorbents and are designed to remove oil or organic solvents from water. Cellulose-based aerogels can be distinguished as polymers that are non-toxic, environmentally friendly, and biodegradable. The compression measurement properties of aerogels are often evaluated using dry samples. Here, oil-soaked, hydrophobized cellulose aerogel samples were examined in comparison to dry samples with and without additional hemp fibers and various levels of starch for crosslinking. The samples were characterized by compression measurement properties and filmed to evaluate the regeneration of the sorbent with repeated use. Overall, the measurements of the mechanical properties for the dry samples showed good reproducibility. The Young’s modulus of samples with additional hemp fibers is significantly increased and also shows higher strength than samples without hemp fibers. However, samples without hemp fibers showed slightly better relaxation after compression. Oil acts as a weak plasticizer for all aerogel samples. However, it is important to note that the oil does not cause the samples to decompose in the way unmodified cellulose aerogels do in water. Therefore, using hydrophobized cellulose aerogels as sorbents for oil in a sea or harbor with swell means that they can be collected in their entirety even after use.

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“…Therefore, cellulose stands out as the most favorable material for designing and preparing eco-friendly super-wetting oil/water separation materials. With the rapid development of design ideas and fabrication technologies, a significant number of cellulose-based oil/water separation materials have emerged [ 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 ]. For example, Ma et al reported the successful development of cellulose-coated cotton fabric with hydrophilic and underwater oleophobic properties.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophilic and Underwater Superoleophobic Copper Mesh Coated with Bamboo Cellulose Hydrogel for Efficient Oil/Water Separation

Peng,

Zhao,

Huang

et al. 2023

Polymers

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Super-wetting interface materials have shown great potential for applications in oil–water separation. Hydrogel-based materials, in particular, have been extensively studied for separating water from oily wastewater due to their unique hydrophilicity and excellent anti-oil effect. In this study, a superhydrophilic and underwater superoleophobic bamboo cellulose hydrogel-coated mesh was fabricated using a feasible and eco-friendly dip-coating method. The process involved dissolving bamboo cellulose in a green alkaline/urea aqueous solvent system, followed by regeneration in ethanol solvent, without the addition of surface modifiers. The resulting membrane exhibited excellent special wettability, with superhydrophilicity and underwater superoleophobicity, enabling oil–water separation through a gravity-driven “water-removing” mode. The super-wetting composite membrane demonstrated a high separation efficiency of higher than 98% and a permeate flux of up to 9168 L·m−2·h−1 for numerous oil/water mixtures. It also maintained a separation efficiency of >95% even after 10 cycles of separation, indicating its long-term stability. This study presents a green, simple, cost-effective, and environmentally friendly approach for fabricating superhydrophilic surfaces to achieve oil–water separation. It also highlights the potential of bamboo-based materials in the field of oil–water separation.

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Low temperature-resistant superhydrophobic and elastic cellulose aerogels derived from seaweed solid waste as efficient oil traps for oil/water separation

Cited by 9 publications

References 65 publications

Construction and Regulation of a Superhydrophobic Sponge via In Situ Anchoring of a Hyper-Cross-Linked Polymer for Efficient Oil/Water Separation

Construction and Regulation of a Superhydrophobic Sponge via In Situ Anchoring of a Hyper-Cross-Linked Polymer for Efficient Oil/Water Separation

Mechanical Properties of Cellulose Aerogel Composites with and without Crude Oil Filling

Superhydrophilic and Underwater Superoleophobic Copper Mesh Coated with Bamboo Cellulose Hydrogel for Efficient Oil/Water Separation

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