Superhydrophobic electrospun nanofibers

Nuraje, Nurxat; Khan, Waseem S.; Lei, Yu; Ceylan, Muhammet; Asmatulu, Ramazan

doi:10.1039/c2ta00189f

Cited by 305 publications

(189 citation statements)

References 111 publications

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“…The nanofibrous separation membrane was fabricated using the commercially available fluoro-containing polymer poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) 31 via a simple electrospinning method [32][33][34][35] in which 1H, 1H, 2H, 2H-perfluorodecyltrimethoxysilane (PFDTMS) was doped as a regulator for tuning of the oleophobicity of the membrane. Figure 1 demonstrates the fabrication and separation process of the membrane.…”

Section: Resultsmentioning

confidence: 99%

Separation of organic liquid mixture by flexible nanofibrous membranes with precisely tunable wettability

Hou

Wang

et al. 2016

NPG Asia Mater

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Separation of liquid mixtures, especially organic liquid mixtures, is widely used in industrial processes but still faces challenges with respect to separation in a high-efficiency, low-energy mode. In this work, we report a flexible wettability-tunable nanofibrous membrane composed of a high-performance fluoro-polymer as the matrix and fluorosilane as a surface energy regulator that can be successfully applied in immiscible organic liquid mixture separation. The separation is achieved by tuning the surface energy of a membrane to a value between the surface tensions of two organic liquids. Moreover, for use in different mixed liquid systems, we programmatically designed nanofibrous membranes with the proper surface energy that could intercept the relatively high surface tension liquid and allow the low surface tension liquid to pass through. These membranes are expected to become a competitive candidate for complex organic chemical product separation, resource recycling, and environmental protection. INTRODUCTIONLiquid mixtures of solvents or reactants are ubiquitously applied in processes in the petrochemical, textile printing, food and medical industries. These complex liquid mixtures often must be separated after reaction for the purpose of product purification, resource recycling or harmless discharge. 1 Traditional liquid separation methods such as distillation and separation have exposed many drawbacks, including high-energy consumption, low flux and low efficiency, that dramatically increase the separation time and cost. 2 Therefore, challenges remain for the development of separation processes of organic liquid mixtures that are efficient, allow high throughput and conserve energy. Among various separation approaches, the membrane separation technique has been extensively proven as a high throughput and energy-efficient choice. [3][4][5] Over the past decade, various membranes with special wettability properties have been successfully prepared and have exhibited excellent performance in oil/water separation. The mechanisms of membrane separation are based on exact opposite wettabilities toward oil and water, including superhydrophobic/superoleophilic membranes 3,5-8 or superhydrophilic/superoleophobic membranes. 9-15 For example, superhydrophobic/oleophilic membranes have been prepared from various materials, including metals, polymers or even clothes and filter papers, that could intercept water and allow oil to pass through. [16][17][18][19][20] In addition, researchers have gained inspiration from oil-contaminantfree fish skin to fabricate oil-repellent hydrogel membranes that could separate oil from water. 21,22 Although significant progress has been achieved for membrane-based oil/water separation in the last few years, development of separation membranes for organic liquids is still highly limited because organic liquids usually possess a relatively lower surface tension than water. The difficulty in separation of organic liquid mixtures has increased because it is more difficult to build a super...

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Section: Resultsmentioning

confidence: 99%

Separation of organic liquid mixture by flexible nanofibrous membranes with precisely tunable wettability

Hou

Wang

et al. 2016

NPG Asia Mater

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“…Second, these droplets should not be strongly attached to a surface and easily move, even at a low inclination. Third, water droplets should actively pick up dust particles; so the adhesion between dust and a solid surface should be lower than the adhesion between dust and water [3]. …”

Section: Self-cleaning Effectmentioning

confidence: 99%

“…Superhydrophobic surfaces with water contact angles higher than 150°have drawn great scientific and industrial interest due to their applications involving water repellency, self-cleaning, and antifouling properties [1][2][3]. Examples of superhydrophobic surfaces including lotus leaves, butterfly wings and spider silks can be widely found in nature [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic behavior of polyimide–siloxane mats produced by electrospinning

2015

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In this study, a series of novel superhydrophobic polyimide-siloxane electrospun mats was prepared using an electrospinning process. Segmented polyimide-siloxane copolymers were prepared using 4,4 0 -oxydianiline (ODA) and 3,3 0 ,4,4 0 -benzophenone tetracarboxylic dianhydride (BTDA) as hard segments and aminopropyl terminated polydimethylsiloxane (APPS) and BTDA as soft segment. The polyimide-siloxane copolymers were synthesized by varying the APPS loading (10 and 20 mol%) and also the molecular weight of APPS (1000 and 2500 g/mol), respectively. Electrospinning of the polyamic acids was followed by thermal imidization to construct the electrospun polyimide-siloxane mats. The electrospun mats were characterized by FTIR, scanning electron microcopy (SEM), thermogravimetric analysis (TGA), differential scanning calorimeter (DSC) and contact angle measurement. According to SEM results, the polyimide-siloxane electrospun mats have nano-roughness morphology. Bead on string type surface morphology that has been generated by electrospinning yields stable superhydrophobicity with a contact angle of 167°.

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“…9 Some studies have focused on petroleum-derived polymers, including polysulfone, 10 polystyrene, 11 and polyoxymethylene, 12 which are nonbiodegradable under normal environmental conditions. Therefore, natural biopolymers have gained a lot of attention because of their excellent biocompatibility and biodegradability.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, antimicrobial activity, and release of tetracycline hydrochloride loaded poly(vinyl alcohol)/soybean protein isolate/zirconium dioxide nanofibrous membranes

Wang

Jiang

et al. 2014

J of Applied Polymer Sci

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Tetracycline hydrochloride loaded poly(vinyl alcohol)/soybean protein isolate/zirconium (Tet-PVA/SPI/ZrO 2 ) nanofibrous membranes were fabricated via an electrospinning technique. The average diameter of the PVA/soybean protein isolate (SPI)/ZrO 2 nanofibers used as drug carriers increased with increasing ZrO 2 content, and the nanofibers were uneven and tended to stick together when the ZrO 2 content was above 15 wt %. The Tet-PVA/SPI/ZrO 2 nanofibers were similar in morphology when the loading dosage of the model drug tetracycline hydrochloride was below 6 wt %. The PVA, SPI, and ZrO 2 units were linked by hydrogen bonds in the hybrid networks, and the addition of ZrO 2 improved the thermostability of the polymer matrix. The Tet-PVA/SPI/ZrO 2 nanofibrous membranes exhibited good controlled drug-release properties and antimicrobial activity against Staphylococcus aureus. The results of this study suggest that those nanofibrous membranes were suitable for drug delivery and wound dressing.

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Superhydrophobic electrospun nanofibers

Cited by 305 publications

References 111 publications

Separation of organic liquid mixture by flexible nanofibrous membranes with precisely tunable wettability

Separation of organic liquid mixture by flexible nanofibrous membranes with precisely tunable wettability

Superhydrophobic behavior of polyimide–siloxane mats produced by electrospinning

Synthesis, antimicrobial activity, and release of tetracycline hydrochloride loaded poly(vinyl alcohol)/soybean protein isolate/zirconium dioxide nanofibrous membranes

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