Facile fabrication of hydrophobic and underwater superoleophilic elastic and mechanical robust graphene/PDMS sponge for oil/water separation

Pan, Zihe; Guan, Yi; Liu, Yanhong; Cheng, Fangqin

doi:10.1016/j.seppur.2020.118273

Cited by 44 publications

(24 citation statements)

References 57 publications

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“…According to the results presented in the table, PDMS composites modify the mechanical, thermal, and surface wettability properties of PDMS. The additive-type studies by Zieh Pan et al [ 127 ], Xiashi Ren et al [ 126 ] and Gao Shouwei et al [ 124 ] showed that addition composites help to increase the surface hydrophobicity of PDMS sponges and membranes, thus improving the effectiveness for filtering oil in water and extracting heavy ions. Another study by A. Syafiq et al also modified the surface of PDMS to increase hydrophobicity and fabricate a self-cleaning glass substrate [ 128 ].…”

Section: Results Summarymentioning

confidence: 99%

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Polydimethylsiloxane Composites Characterization and Its Applications: A Review

et al. 2021

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Polydimethylsiloxane (PDMS) is one of the most promising elastomers due its remarkable proprieties such as good thermal stability, biocompatibility, corrosion resistance, flexibility, low cost, ease of use, chemically inertia, hyperplastic characteristics, and gas permeability. Thus, it can be used in areas such as microfluidic systems, biomedical devices, electronic components, membranes for filtering and pervaporation, sensors, and coatings. Although pure PDMS has low mechanical properties, such as low modulus of elasticity and strength, it can be improved by mixing the PDMS with other polymers and by adding particles or reinforcements. Fiber-reinforced PDMS has proved to be a good alternative to manufacturing flexible displays, batteries, wearable devices, tactile sensors, and energy harvesting systems. PDMS and particulates are often used in the separation of liquids from wastewater by means of porosity followed by hydrophobicity. Waxes such as beeswax and paraffin have proved to be materials capable of improving properties such as the hydrophobic, corrosion-resistant, thermal, and optical properties of PDMS. Finally, when blended with polymers such as poly (vinyl chloride-co-vinyl acetate), PDMS becomes a highly efficient alternative for membrane separation applications. However, to the best of our knowledge there are few works dedicated to the review and comparison of different PDMS composites. Hence, this review will be focused on PDMS composites, their respective applications, and properties. Generally, the combination of elastomer with fibers, particles, waxes, polymers, and others it will be discussed, with the aim of producing a review that demonstrates the wide applications of this material and how tailored characteristics can be reached for custom applications.

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Section: Results Summarymentioning

confidence: 99%

“…The graphene-embedded PDMS sponge showed improved elasticity and durability and required less time to absorb the same amount of oil. However, robust and elastic mechanical sponges can be produced for direct application in oil–water separation in an underwater environment with less absorption time [ 127 ].…”

Section: Pdms Compositesmentioning

confidence: 99%

Polydimethylsiloxane Composites Characterization and Its Applications: A Review

et al. 2021

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“…The compressibility of aerogels is usually considered to be a basic feature for the application in oil/water separation due to the fact that their compressibility performance determines their corresponding extrusion capacity [ 33 ]. The compressive loading–unloading curves of F-CS aerogel under strains of 20%, 40%, and 60% are displayed in Figure 4 A.…”

Section: Resultsmentioning

confidence: 99%

Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Zhu

Jiang

Liu

et al. 2021

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A superhydrophobic fluorinated silica functionalized chitosan (F-CS) aerogel is constructed and fabricated by a simple and sustainable method in this study in order to achieve highly efficient gravity-driven oil/water separation performance. The fluorinated silica functionalization invests the pristine hydrophilic chitosan (CS) aerogel with promising superhydrophobicity with a water contact angle of 151.9°. This novel F-CS aerogel possesses three-dimensional structure with high porosity as well as good chemical stability and mechanical compression property. Moreover, it also shows striking self-cleaning performance and great oil adsorption capacity. Most importantly, the as-prepared aerogels exhibits fast and efficient separation of oil/water mixture by the gravity driven process with high separation efficiency. These great performances render the prepared F-CS aerogel a good candidate for oil/water separation in practical industrial application.

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“…Among polymers, there is an increasing interest in the study of polydimethylsiloxane (PDMS) for applications such as mechanical and civil engineering, electronic devices, and in biomedical fields [2][3][4][5][6][7]. Within these areas, applications were reported such as water/oil and gas filtration membranes [8][9][10], sensors [11][12][13], lubricants [14], sealing agents [15], blood analogues [16][17][18], and also for microfluidic devices [19][20][21][22][23]. Recently, there has been a significant growing interest in microelectromechanical systems (MEMS) and microfluidic and optical devices [24].…”

Section: Introductionmentioning

confidence: 99%

Composite Material of PDMS with Interchangeable Transmittance: Study of Optical, Mechanical Properties and Wettability

et al. 2021

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Polydimethylsiloxane (PDMS) is a polymer that has attracted the attention of researchers due to its unique properties such as transparency, biocompatibility, high flexibility, and physical and chemical stability. In addition, PDMS modification and combination with other materials can expand its range of applications. For instance, the ability to perform superhydrophobic coating allows for the manufacture of lenses. However, many of these processes are complex and expensive. One of the most promising modifications, which consists of the development of an interchangeable coating, capable of changing its optical characteristics according to some stimuli, has been underexplored. Thus, we report an experimental study of the mechanical and optical properties and wettability of pure PDMS and of two PDMS composites with the addition of 1% paraffin or beeswax using a gravity casting process. The composites’ tensile strength and hardness were lower when compared with pure PDMS. However, the contact angle was increased, reaching the highest values when using the paraffin additive. Additionally, these composites have shown interesting results for the spectrophotometry tests, i.e., the material changed its optical characteristics when heated, going from opaque at room temperature to transparent, with transmittance around 75%, at 70 °C. As a result, these materials have great potential for use in smart devices, such as sensors, due to its ability to change its transparency at high temperatures.

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Facile fabrication of hydrophobic and underwater superoleophilic elastic and mechanical robust graphene/PDMS sponge for oil/water separation

Cited by 44 publications

References 57 publications

Polydimethylsiloxane Composites Characterization and Its Applications: A Review

Polydimethylsiloxane Composites Characterization and Its Applications: A Review

Sustainable, Highly Efficient and Superhydrophobic Fluorinated Silica Functionalized Chitosan Aerogel for Gravity-Driven Oil/Water Separation

Composite Material of PDMS with Interchangeable Transmittance: Study of Optical, Mechanical Properties and Wettability

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