Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation

Lo, Yu-Hsiang; Yang, Ching‐Wen; Chang, Hsu‐Kai; Hung, Wei-Chen; Chen, Po‐Yu

doi:10.1038/s41598-017-01642-2

Cited by 41 publications

(19 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, numerous investigations have been devoted to the wettability on different surfaces, particularly for the surfaces inspired by Nature Mother [18][19][20][21][22][23][24][25][26]. Paxson et al [27] fabricated a surface with the hierarchical textures initiated by lotus leaves and revealed the relevant mechanism of the variation or evolution of the adhesion force per unit length of the projected contact line distributed on natural textured surfaces.…”

Section: Cassie-baxter Modelmentioning

confidence: 99%

Wettability on Different Surfaces

Kwok¹

2020

21st Century Surface Science - A Handbook

View full text Add to dashboard Cite

Wettability has been explored for 100 years since it is described by Young’s equation in 1805. It is all known that hydrophilicity means contact angle (θ), θ < 90°; hydrophobicity means contact angle (θ), θ > 90°. The utilization of both hydrophilic surfaces and hydrophobic surfaces has also been achieved in both academic and practical perspectives. In order to understand the wettability of a droplet distributed on the textured surfaces, the relevant models are reviewed along with understanding the formation of contact angle and how it is affected by the roughness of the textured surface aiming to obtain the required surface without considering whether the original material is hydrophilic or hydrophobic.

show abstract

Section: Cassie-baxter Modelmentioning

confidence: 99%

Wettability on Different Surfaces

Kwok¹

2020

21st Century Surface Science - A Handbook

View full text Add to dashboard Cite

show abstract

“…Oil spills have occurred frequently historically [1], From the Gulf of Mexico oil spill to the Bohai Bay [2][3][4], every accident has caused tremendous economic losses and environmental pollution, even threaten the entire marine life chain and human survival [5,6]. Therefore, the handling of oil spills is critical [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Traditional methods including gravity separation, slag removal, flotation, adsorption and biological treatment were used to deal with oil spills [4,[9][10][11][12][13]. However, the commonly used methods have their own limits such as low efficiency, incomplete separation, high cost and cumbersome process [1,14].…”

Section: Introductionmentioning

confidence: 99%

A ternary system oleophilic–hydrophobic membrane prepared by electrospinning for efficient gravity-driven oil–water separation

et al. 2019

View full text Add to dashboard Cite

The preparation of composite nanofibers often can make up for the shortage of single materials in the field of oil-water separation, including separation efficiency, mechanical properties and fine flexibility. The film materials prepared by doping inorganic nanoparticles have defects of poor stability and uneven dispersion of the fiber surface. In this paper, we prepared a novel polyvinylidene fluoride (PVDF)-polystyrene (PS)-cellulose acetate (CA) ternary mixture system membrane by electrospinning. Nanosized polystyrene in the spinning process uniformly gathers on the fiber surface by interlacing PVDF and CA to manipulate the microstructure of the fiber surface. PVDF is added to increase mechanical properties. Degradable CA is selected to promote pore formation and compatibility between the other two polymers. The composite membrane has high separation efficiency, high oil flux and superior mechanical properties as demonstrated by oil/water separation test and stress-strain test. The optimized oil flux reaches 1935.67 L h −1 m −2 only driven by gravity of 0.73 kPa. Due to low energy consumption, excellent separation and more flexible regulation, this membrane may have great application value in industrial oil-water separation in the future.

show abstract

“…Recently, diatomite was proposed as active support to obtain hierarchically porous nanocomposites with interesting application in environmental field [18][19][20] . The addition of other levels of porosity, with varying sizes, to the nano porosity already present and typical of diatomite 21,22 , leads to a bio-inspired final product with hierarchical and graded porosity that can be properly tuned according to the final properties desired for the material.…”

mentioning

confidence: 99%

Process strategy to fabricate a hierarchical porosity gradient in diatomite-based foams by 3D printing

Capasso

Liguori

Verdolotti

et al. 2020

Sci Rep

View full text Add to dashboard Cite

Motivated by the hierarchical micro and nanoscale features in terms of porosity of diatomite, the production of ceramic-graded porous foams with tailored porosity, obtained by using it as raw material, has been proposed. the main challenge during the foam-production process has been the preservation of diatomite nanometric porosity and the addition of other levels of hierarchical porosity. the coupled use of two techniques of direct foaming (chemical and mechanical), combined with the use of 3D printing inverse replica method, assured the achievement of porosity of, respectively, microscopic and macroscopic dimensions. optical and scanning electron microscopies have been performed for an in-depth characterization of the final microstructure. XRD analysis has been carried out to check the influence of sacrificial templates on the matrix mineralogical composition. The porosity of the diatomite-based foams has been investigated by means of nitrogen-adsorption analysis and mercuryintrusion porosimetry. The experimental tests confirmed the presence of different porous architectures ranging over several orders of magnitudes, giving rise to complex systems, characterized by hierarchical levels of porosity. The presence of porosity of graded dimensions affects the final mechanical performances of the macroporous diatomite-based foams, while their mineralogical composition does not result to be affected by the addition of templates.

show abstract

Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation

Cited by 41 publications

References 45 publications

Wettability on Different Surfaces

Wettability on Different Surfaces

A ternary system oleophilic–hydrophobic membrane prepared by electrospinning for efficient gravity-driven oil–water separation

Process strategy to fabricate a hierarchical porosity gradient in diatomite-based foams by 3D printing

Contact Info

Product

Resources

About