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Impact of Additives on Poly(acrylonitrile-butadiene-styrene) Membrane Formation Process Using Non-Solvent-Induced

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Researchers explored greener methods for creating Poly(acrylonitrile-butadiene-styrene) (ABS) membranes using additives. Additives altered membrane pore structure and performance, offering a pathway to safer, more effective membrane fabrication.

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ABSnon-solvent-induced phase separation

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Membrane Technology

Background:

  • Poly(acrylonitrile-butadiene-styrene) (ABS) is a versatile polymer widely used in various applications, including membranes.
  • Conventional ABS membrane fabrication often involves toxic solvents and results in dense structures, limiting their applicability.
  • Developing environmentally friendly fabrication methods for ABS membranes is crucial for sustainable industrial practices.

Purpose of the Study:

  • To investigate the synthesis of ABS membranes using green solvents.
  • To evaluate the influence of water-soluble additives (ethanol, acetone) on the phase inversion process.
  • To understand how additives impact ABS membrane structure and performance.

Main Methods:

  • ABS membranes were fabricated using the green solvent PolarClean with varying concentrations of ethanol and acetone.
  • Membrane morphology was characterized using scanning electron microscopy (SEM).
  • Porosity was determined using a pycnometer, and performance was assessed via dead-end cell filtration measuring water flux and protein rejection.

Main Results:

  • ABS membranes fabricated solely with PolarClean exhibited fingerlike pores and lower protein rejection.
  • The addition of additives significantly altered membrane pore architecture and improved protein rejection.
  • Changes in pore structure and performance were attributed to additive volatility, humidity, and liquid-liquid separation destabilization.

Conclusions:

  • Additives play a critical role in controlling the phase inversion process for ABS membrane fabrication.
  • The use of green solvents and additives offers a promising route to engineer ABS membranes with tailored structures and enhanced performance.
  • This study contributes to a better understanding of safer solvent systems for ABS membrane production.