Journal of Membrane Science & Technology

Advanced Functional Applications of Electrospun Membranes in Separation Processes

Matteo Linderholm^* Department of Nanomaterials and Process Engineering, Chalmers University of Technology, Gothenburg, Sweden
^*Correspondence: Matteo Linderholm, Department of Nanomaterials and Process Engineering, Chalmers University of Technology, Gothenburg, Sweden, Email:

Received: 16-Feb-2026 Editor assigned: 18-Feb-2026 Reviewed: 04-Mar-2026 Revised: 11-Mar-2026 Published: 18-Mar-2026, DOI: 10.35248/2155-9589.26.16.453

Description

Electrospun membranes have gained significant attention in modern separation science due to their fine fiber structures, high surface area and controllable porosity. These membranes are produced using electrospinning, a technique that applies a strong electric field to a polymer solution or melt, drawing it into ultra-thin fibers that are collected as a nonwoven mat. The resulting structures offer unique characteristics that make them suitable for filtration, biomedical applications, energy systems and environmental treatment processes. Their ability to be engineered at the nanoscale has expanded possibilities for designing materials with specific transport and adsorption properties.

The electrospinning process involves several parameters that directly influence membrane morphology. Voltage strength, solution viscosity, polymer concentration and collection distance all affect fiber diameter and uniformity. By adjusting these parameters, researchers can produce membranes with tailored pore sizes ranging from micro to nanoscale dimensions. This control over structural features enables selective separation of particles, molecules and even ions depending on application requirements. The interconnected porous network formed during electrospinning provides high permeability while maintaining effective filtration performance.

Polymer selection plays an important role in determining electrospun membrane properties. Common materials include polyacrylonitrile, polyvinylidene fluoride, polysulfone and polyethylene oxide. Each polymer offers distinct advantages related to chemical stability, mechanical strength and surface compatibility. Blending multiple polymers or incorporating additives allows further modification of membrane performance. Functional nanoparticles such as titanium dioxide, silver and carbon-based materials can be embedded within fibers to enhance antimicrobial properties, catalytic activity or adsorption capacity.

Water treatment is one of the major application areas for electrospun membranes. Their high porosity and large surface area enable efficient removal of suspended solids, organic compounds and microorganisms from contaminated water. In many systems, electrospun membranes are used as pre-filters or combined with other membrane processes such as ultrafiltration or reverse osmosis. Their ability to reduce fouling in downstream membranes makes them valuable in multi-stage filtration systems. In addition, their lightweight structure allows easier integration into compact treatment units.

Air filtration is another important application of electrospun membrane technology. Fine fiber networks can capture airborne particles, including dust, smoke and microorganisms, with high efficiency. This makes them suitable for use in industrial air purification systems, protective masks and ventilation units. The small fiber diameter increases interception and diffusion mechanisms, improving particle capture even at low pressure drops. This balance between efficiency and airflow resistance is a key advantage over conventional fibrous filters.

Biomedical applications also benefit from electrospun membranes due to their similarity to natural extracellular matrix structures. These materials are used in wound dressings, tissue scaffolds and drug delivery systems. Their porous structure allows nutrient exchange and cell attachment, supporting tissue regeneration. Drug-loaded electrospun fibers can release therapeutic agents in controlled patterns, improving treatment effectiveness in localized medical applications.

Conclusion

Electrospun membranes continue to evolve as research explores new polymer systems, fabrication techniques and hybrid structures. Their ability to combine structural flexibility with functional performance makes them valuable across multiple industries. Continued improvements in scalability, mechanical stability and functional customization are expected to enhance their role in future separation technologies and environmental applications. Advances in material science have enabled the development of smart electrospun membranes that respond to external stimuli such as temperature, pH or light. These responsive systems can adjust permeability or adsorption behavior depending on environmental conditions. Such adaptability provides new opportunities for controlled separation processes and intelligent filtration systems.