Molecular and structural design of polyacrylonitrile-based membrane for oil-water separation

Lv, Chao; Hao, Bin; Yasin, Akram; Yue, Xiu; Ma, Peng‐Cheng

doi:10.1016/j.polymer.2022.124969

Cited by 8 publications

(2 citation statements)

References 47 publications

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“…Amphiphilic copolymers are macromolecules that contain hydrophilic and hydrophobic segments within the same polymer chain. Due to the distinct properties of hydrophilic and hydrophobic segments, amphiphilic copolymers tend to undergo microphase separation, forming self-assembled structures such as micelles in solvents like water. − Among them, FACs exhibit stronger microphase separation due to the larger disparity between different affinity segments. − In recent years, researchers have extensively explored the applications of FACs in areas such as antifouling coatings, − fabric finishing agents, ,, and oil–water separation − with the unique synergistic effect of hydrophilic segments of FACs.…”

Section: Introductionmentioning

confidence: 99%

Surface Microphase Separation and Water-Induced Reconstruction of Fluorinated Amphiphilic Copolymer Coatings for Soil Release Fabrics

Jiang,

Huang,

et al. 2023

ACS Appl. Polym. Mater.

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With the excessive use of laundry detergents, surfactants from laundry wastewater pose a significant threat to ecological sustainability. Increased attention has been paid to fluorinated amphiphilic copolymers (FACs) that can impart fabrics with water/oil repellency and soil release properties that reduce detergent usage. Depending on their application, FACs are distinguished by surface microphase separations and water-induced surface reconstructions. In this study, a miniemulsion polymerization method was successfully used to synthesize five different hydrophobic−hydrophilic ratio polymer emulsions. An investigation of FACs coating the surface microphase separation and water-induced surface reconstruction was conducted. Hydrophobic−hydrophilic interactions between side chains with significant differences were systematically explained as well. Fluorine-containing components dominate the hydrophobic−hydrophilic interactions, creating highly active molecular chains and water-driven surface reconstruction capabilities. Conversely, in copolymers where hydrophilicity dominates, side chains are significantly separated microscopically, and molecular chains are not mobile. Thus, surface reconstruction is relatively poor under the same conditions. As long as the hydrophobic−hydrophilic ratio is close to equal, two surface phenomena are capable of currents between the two aforementioned scenarios. Further confirmation of the correlation between the application performance of coated fabrics and surface phenomena of films can be obtained from the application tests of fabrics coated with FACs. F75 (the mass content of fluorinated acrylate 13FMA is 75%), whose film has a relatively low surface free energy (γ s = 9.18 mN/m) and the best water-induced surface reconstruction ability (Δγ s = 1.61 mN/m), can be the optimal choice for the soil release finishing agent (initial soil release rating = 4). FACs on soil release fabric finishes are developed and applied based on this study, which provides theoretical guidance for their development and application.

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Section: Introductionmentioning

confidence: 99%

Surface Microphase Separation and Water-Induced Reconstruction of Fluorinated Amphiphilic Copolymer Coatings for Soil Release Fabrics

Jiang,

Huang,

et al. 2023

ACS Appl. Polym. Mater.

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“…Polymeric membranes, on the other hand, offer high flexibility, low-cost fabrication, and desirable mechanical, thermal, and chemical properties, making them ideal for water treatment applications [18][19][20][21]. Polymers such as polysulfone [21], polyethersulfone (PES) [22], polyamide [23], polyacrylonitrile [24], polyimide [25], and polyvinylidene fluoride (PVDF) [26] are widely used in filtration membrane fabrication. PES is particularly popular due to its excellent chemical and mechanical stability and biocompatibility [27,28].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Polyethersulfone/Activated Carbon Composite Membranes for Water Filtration

Prihandana,

Maulana,

Soedirdjo

et al. 2023

Membranes

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Ultrafiltration membrane technology holds promise for wastewater treatment, but its widespread application is hindered by fouling and flux reduction issues. One effective strategy for enhancing ultrafiltration membranes involves incorporating activated carbon powder. In this study, composite polyethersulfone (PES) ultrafiltration membranes were fabricated to include activated carbon powder concentrations between 0 and 1.5 wt.%, with carbon size fixed at 200 mesh. The ultrafiltration membranes were evaluated in terms of membrane morphology, hydrophilicity, pure water flux, equilibrium water content, porosity, average pore size, protein separation, and E-coli bacteria removal. It was found that the addition of activated carbon to PES membranes resulted in improvements in some key properties. By incorporating activated carbon powder, the hydrophilicity of PES membranes was enhanced, lowering the contact angle from 60° to 47.3° for composite membranes (1.0 wt.% of activated carbon) compared to the pristine PES membrane. Water flux tests showed that the 1.0 wt.% composite membrane yielded the highest flux, with an improvement of nearly double the initial value at 2 bar, without compromising bovine serum albumin rejection or bacterial removal capabilities. This study also found that the inclusion of activated carbon had a minor impact on the membrane’s porosity and equilibrium water content. Overall, these insights will be beneficial in determining the optimal concentration of activated carbon powder for PES ultrafiltration membranes.

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Preparation of superhydrophilic poly(acrylonitrile/acrylic acid) electrospun membrane and its application in oil/water separation

Yasin

et al. 2022

Polymer

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Molecular and structural design of polyacrylonitrile-based membrane for oil-water separation

Cited by 8 publications

References 47 publications

Surface Microphase Separation and Water-Induced Reconstruction of Fluorinated Amphiphilic Copolymer Coatings for Soil Release Fabrics

Surface Microphase Separation and Water-Induced Reconstruction of Fluorinated Amphiphilic Copolymer Coatings for Soil Release Fabrics

Preparation and Characterization of Polyethersulfone/Activated Carbon Composite Membranes for Water Filtration

Preparation of superhydrophilic poly(acrylonitrile/acrylic acid) electrospun membrane and its application in oil/water separation

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