Biodegradable and hydrophobic nanofibrous membranes produced by solution blow spinning for efficient oil/water separation

Bang, Junsik; Park, Subong; Hwang, Sung-Wook; Oh, Jung-Kwon; Yeo, Hwanmyeong; Jin, Hyoung‐Joon; Kwak, Hyo Won

doi:10.1016/j.chemosphere.2022.137240

Cited by 21 publications

(10 citation statements)

References 60 publications

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“…Among these parameters, solution properties like polymer concentration and, thus, the viscosity of spinning solution have a pronounced effect on the nanofiber geometry and its microstructure. , The critical concentration of a polymer solution during electrospinning is important because it determines the minimum concentration at which the solution can be electrospun into stable and continuous fibers. If the polymer concentration is too low, the solution will not have enough viscosity to form stable fibers, while if the concentration is too high, the fibers will be too thick and will not be able to be drawn out by the electrostatic forces. , Critical concentration is also related to the solution’s viscoelastic properties, which can affect the fiber formation process. Therefore, using a polymer solution at or above the critical concentration is important to achieve consistent high-quality fibers.…”

Section: Resultsmentioning

confidence: 99%

“…If the polymer concentration is too low, the solution will not have enough viscosity to form stable fibers, while if the concentration is too high, the fibers will be too thick and will not be able to be drawn out by the electrostatic forces. 43,44 Critical concentration is also related to the solution's viscoelastic properties, which can affect the fiber formation process. Therefore, using a polymer solution at or above the critical concentration is important to achieve consistent high-quality fibers.…”

Section: Preparation and Structural Characterization Of Poly(amide-im...mentioning

confidence: 99%

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Superhydrophilic Electrospun Polyamide-Imide Membranes for Efficient Oil/Water Separation under Gravity

Gurave,

Rastgar,

Mizan

et al. 2023

ACS Appl. Eng. Mater.

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The efficient separation of oil/water mixtures by membrane technology is highly dependent on the performance of membrane materials. The emergence of electrospinning has opened up opportunities for designing super porous structures with excellent oil/water separation efficiency. Herein, we prepared electrospun nanofibrous membranes using a highly hydrophilic and thermomechanically stable polyamide-imide (PAI) polymers. The fabricated membranes by a set of optimized electrospinning processes were examined in the gravity-driven separation of various oil/water emulsions. The effect of polymer concentration on fiber diameter and porosity of membranes was evaluated. It was observed that increasing the PAI concentration in the electrospinning dope resulted in the fabrication of membranes with larger fibers and a larger pore size. The fiber diameter and thus, the porosity and pore size of the membrane influenced the flux and separation efficiency during filtration. The membrane with a 12% PAI concentration (EM1) showed a lower flux, whereas the 21% PAI membrane (EM4) offered a higher flux but lower separation efficiency. The membranes exhibited excellent underwater antioil adhesion behavior by completely repelling n-hexane, mineral oil, n-hexadecane, and gasoline droplets from their prewetted surfaces. Compared to other membranes, the 15% PAI membrane (EM2) was found to strike a balance between water flux and oil rejection while also exhibiting strong resistance to oil fouling, as evidenced by its relatively lower flux decline (FD) and higher flux recovery ratio (FRR) when filtering various emulsions. The EM2 membrane demonstrated an excellent pure water flux of 800 to 900 L/m 2 h (LMH) and an emulsion flux of 380 to 410 LMH. The FRR and oil rejection of the membrane were 91−97 and >99%, respectively. Moreover, the prepared membrane was stable at pH 3 to 9 with a consistent separation performance. The EM2 membrane was also utilized for n-hexane/water emulsion separation in cyclic tests and provided stable oil rejection and FRR after 10 cycles, demonstrating the high potential of this membrane in real oil/water emulsion separation processes.

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Section: Resultsmentioning

confidence: 99%

Section: Preparation and Structural Characterization Of Poly(amide-im...mentioning

confidence: 99%

Superhydrophilic Electrospun Polyamide-Imide Membranes for Efficient Oil/Water Separation under Gravity

Gurave,

Rastgar,

Mizan

et al. 2023

ACS Appl. Eng. Mater.

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“…However, these methods are ineffective in separating surfactant-stabilized oily wastewater . Conventional approaches can be expensive, difficult to handle, and might even lead to higher levels of pollution . Therefore, new methods and technologies are required to deal with oil/water emulsions. – …”

Section: Introductionmentioning

confidence: 99%

“…6 Conventional approaches can be expensive, difficult to handle, and might even lead to higher levels of pollution. 7 Therefore, new methods and technologies are required to deal with oil/ water emulsions. 8−11 Membrane-based technology is a good option for separating stabilized oil-in-water emulsions efficiently, cost-effectively, and in an environmentally friendly way.…”

Section: ■ Introductionmentioning

confidence: 99%

Highly Permeable Sulfonated Polydopamine Integrated MXene Membranes for Efficient Surfactant-Stabilized Oil-in-Water Separation

Baig,

Khan,

Salhi

et al. 2023

Langmuir

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MXene is an incredibly promising two-dimensional material with immense potential to serve as a high-performing separating or barrier layer to develop advanced membranes. Despite the significant progress made in MXene membranes, two major challenges still exist: (i) effectively stacking MXene nanosheets into defect-free membranes and (ii) the high fouling tendency of MXene-based membranes. To address these issues, we employed sulfonated polydopamine (SPD), which simultaneously serves as a binding agent to promote the compact assembling of Ti3C2T x MXenes (MX) nanosheets and improves the antifouling properties of the resulting sulfonated polydopamine-functionalized MX (SPDMX) membranes. The SPDMX membrane was tested for challenging surfactant-stabilized oil-in-water separation with an impressive efficiency of 98%. Moreover, an ultrahigh permeability of 1620 LMH/bar was also achieved. The sulfonation of PD helps in improving the antifouling characteristics of SPDMX by developing a strong hydration layer and enhancing the oleophobicity of the membrane. The underwater SPDMX membrane appeared superoleophobic with an oil contact angle of 153°, whereas the ceramic membrane exhibited an oil contact angle of 137°. The SPDMX membranes showed an improved flux recovery (31%) compared to the nonsulfonated counterpart. This work highlights the appropriate functionalization of MXene as a promising approach to developing MXene membranes with high permeation flux and better antifouling characteristics for oily wastewater treatment.

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“…Consequently, there is increasing interest in using bioderived and biodegradable polymers to fabricate environmentally friendly electrospun membranes. A variety of biodegradable polymers were utilized to prepare nanofibrous membranes for oil/water separation, including cellulose, polylactide acid (PLA), polybutylene succinate (PBS), and polycaprolactone (PCL) . Among these, PCL, an aliphatic polyester, has been widely utilized in different applications, such as tissue engineering, drug delivery, and water treatment, due to its excellent mechanical property, biocompatibility, biodegradability, and processing advantages. , However, the relatively higher prices of PCL compared with conventional polymers limit their large-scale application.…”

Section: Introductionmentioning

confidence: 99%

“Biomass to Membrane”: Sulfonated Kraft Lignin/PCL Superhydrophilic Electrospun Membrane for Gravity-Driven Oil-in-Water Emulsion Separation

Mizan,

Gurave,

Rastgar

et al. 2023

ACS Appl. Mater. Interfaces

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Biobased membranes made with green solvents have numerous advantages in the water purification industry; however, their long-term use is impeded by severe membrane fouling and low structural stability. Herein, we proposed a facile and green approach to fabricate an eco-friendly and biodegradable electrospun membrane by simply blending polycaprolactone (PCL) with sulfonated kraft lignin (SKL) in a green solvent (i.e., acetic acid) without needing any additional post-treatment. We investigated the influence of SKL content on the surface morphology, chemical composition, and mechanical properties of the electrospun membrane. The SKL-modified membranes (L-5 and L-10) showed superhydrophilicity and underwater superoleophobicity with a water contact angle (WCA) of 0° (<3 s) and an underwater–oil contact angle (UWOCA) over 150° due to the combined effect of surface roughness and hydrophilic chemical functionality. Furthermore, the as-prepared membranes demonstrated excellent pure water flux of 800–900 LMH and an emulsion flux of 170–480 LMH during the gravity-driven filtration of three surfactant-stabilized oil-in-water emulsions, namely, mineral oil/water, gasoline/water, and n-hexadecane/water emulsions. In addition, these membranes exhibited superior antioil-fouling performance with excellent separation efficiency (97–99%) and a high flux recovery ratio (>98%). The 10 wt % SKL-incorporated membrane (L-10) also showed consistent separation performance after 10 cyclic tests, indicating its excellent reusability and recyclability. Furthermore, the stability of the membrane under harsh pH conditions was also evaluated and proved to be robust enough to maintain its wettability in a wide pH range (pH 1–10).

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Biodegradable and hydrophobic nanofibrous membranes produced by solution blow spinning for efficient oil/water separation

Cited by 21 publications

References 60 publications

Superhydrophilic Electrospun Polyamide-Imide Membranes for Efficient Oil/Water Separation under Gravity

Superhydrophilic Electrospun Polyamide-Imide Membranes for Efficient Oil/Water Separation under Gravity

Highly Permeable Sulfonated Polydopamine Integrated MXene Membranes for Efficient Surfactant-Stabilized Oil-in-Water Separation

“Biomass to Membrane”: Sulfonated Kraft Lignin/PCL Superhydrophilic Electrospun Membrane for Gravity-Driven Oil-in-Water Emulsion Separation

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