Enhancing performance of polyacrylonitrile membranes for pervaporation dehydration of ethanol by tailoring morphology and process parameters

Nejad, Seyed Mohammad Hosseini; Mostafavi, Amir Hossein; Hosseini, Seyed Saeid; Zeng, Haoze; Shao, Lu

doi:10.1007/s11814-022-1125-0

Cited by 3 publications

(4 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The observed morphologies also confirm that the combination of the concentration of PAN (16.5 wt%) and the type of solvent (DMF) has been appropriate in order to offer the desirable outcome. In fact, such selection and tuning was based on our prior experiences in development of various PAN‐based membranes via phase inversion technique 44,45 …”

Section: Resultsmentioning

confidence: 99%

“…In fact, such selection and tuning was based on our prior experiences in development of various PAN-based membranes via phase inversion technique. 44,45 In fact, aside to the formulation, the procedure and conditions used for the phase inversion is very important. It is well documented that that instantaneous demixing leads to the formation of finger-like structures with a thin skin layer, while delayed demixing results in a spongelike structure with a thick skin layer.…”

Section: Characteristics Of Fabricated Pan Substratesmentioning

confidence: 99%

See 1 more Smart Citation

Development of polyamide/polyacrylonitrile thin film composite RO membranes by interfacial polymerization assisted with an aromatic/aliphatic organic solvent mixture

Mokarinezhad

Hosseini

Nxumalo

2023

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

The proper control of polymerization is a prerequisite in fabrication of thin film composite reverse osmosis (RO) membranes. But it not trivial when hydrophilic substrates are used. Herein, we report an innovative approach which involves using an aromatic/aliphatic solvent mixture of toluene and n‐hexane as the organic phase for interfacial polymerization. Membranes were tuned by using a customized developed polyacrylonitrile (PAN) substrate and exploring the impacts of organic solvent and curing temperatures on their morphology and performance characteristics. Results revealed that increasing the temperature of organic phase to 20°C improved salt rejection significantly to 98.6% with the flux of 16.1 LMH. However, its further increase to 30°C was not beneficial due to formation of a looser chain packing which led to rejection drop. In addition, raising curing temperature to 90°C was not favorable due to transformation of surface morphology from ridge‐and‐valley to nodular structure, accompanied with defective sites at the selective layer and insufficient degree of crosslinking evidenced by declines in both flux and rejection to 11.1 LMH and 83.4%, respectively. Overall, the findings suggested that an optimal performance could be obtained by using a solvent mixture of toluene/n‐hexane (1,1) and setting organic solvent and curing temperatures to 20 and 70°C, respectively.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Characteristics Of Fabricated Pan Substratesmentioning

confidence: 99%

Development of polyamide/polyacrylonitrile thin film composite RO membranes by interfacial polymerization assisted with an aromatic/aliphatic organic solvent mixture

Mokarinezhad

Hosseini

Nxumalo

2023

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…In pervaporation, components of a liquid mixtures are separated based on the relative boiling points and the affinity of ingredients for the transport through the membrane in the vapor phase. 307,308 This method is highly competitive in terms of energy saving and efficiency compared to alternative techniques such as distillation and has been widely used for dehydration of organic solvents and alcohols, separation of organic-organic mixtures as well as removal of volatile compounds from wastewaters. 309,310 In development of membranes for pervaporation, the strategy depends on which component transports faster.…”

Section: Pervaporationmentioning

confidence: 99%

Advances in surface modification and functionalization for tailoring the characteristics of thin films and membranes via chemical vapor deposition techniques

Mostafavi

Mishra

Gallucci

et al. 2023

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Advanced materials are among the prime drivers for technological revolutions and transformation in quality of lives. Over time, several modification techniques have emerged enabling development of novel materials with extraordinary features. The present review aims to introduce various promising chemical and physical surface modification techniques instrumental for tailoring the characteristics of thin films and membranes. Meticulous discussions are provided over chemical vapor deposition (CVD) techniques evolved for addressing the demands for materials with desired functionalities. Also, essential criteria for the selection of substrates, modifying and precursor materials for an effective CVD modification are elaborated. Investigations are extended to unraveling the role of various process parameters on the quality and properties of deposition. Special attention is paid to the significance and performance of CVD‐based membranes and thin films for industrial applications ranging from desalination and water treatment to energy and environment, biomedical and life science as well as packaging. The goal has been to establish a scientific platform for a timely tracking of the prevailing trends in exploitation of CVD techniques and highlighting the unexplored opportunities. This also helps in identification of the scientific and technical gaps and setting directions for further progress in the fields of thin films and membranes.

show abstract

“…One of the essential factors that play an important role in the performance is the membrane material. Among the diverse ranges of polymers, polyacrylonitrile (PAN) has particular physicochemical properties, such as hydrophilicity, a high melting point, high mechanical stability, and solubility in conventional solvents [29,30]. Owing to the hydrophilic nature, membranes derived from PAN have been explored for a variety of water and wastewater applications, particularly those involving oil-water emulsions [31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Morphology and Performance of Polyacrylonitrile Ultrafiltration Membranes for Produced Water Treatment via Solvent Mixture Strategy

2022

Self Cite

View full text Add to dashboard Cite

The separation performance of membranes is highly dependent on their morphology and microstructure. The present study aims to tailor the characteristics of asymmetric polyacrylonitrile (PAN) ultrafiltration membranes by adopting a solvent mixture strategy, combining dimethylformamide (DMF) and N‐methyl‐2‐pyrrolidone (NMP) for produced water treatment. The ternary phase diagram was used for better analysis of the microstructural changes from the thermodynamics point of view. Using a solvent mixture containing more DMF (i.e., 75 %) and increasing the PAN concentration in the dope were effective in improving the solution viscosity and promoting delayed demixing. As a result, finger‐like macrovoids were suppressed to some extent and the internal morphology of the membranes was transformed into a sponge‐like structure, accompanied by a reduction in the overall membrane porosity and mean pore size.

show abstract

Enhancing performance of polyacrylonitrile membranes for pervaporation dehydration of ethanol by tailoring morphology and process parameters

Cited by 3 publications

References 64 publications

Development of polyamide/polyacrylonitrile thin film composite RO membranes by interfacial polymerization assisted with an aromatic/aliphatic organic solvent mixture

Development of polyamide/polyacrylonitrile thin film composite RO membranes by interfacial polymerization assisted with an aromatic/aliphatic organic solvent mixture

Advances in surface modification and functionalization for tailoring the characteristics of thin films and membranes via chemical vapor deposition techniques

Tailoring the Morphology and Performance of Polyacrylonitrile Ultrafiltration Membranes for Produced Water Treatment via Solvent Mixture Strategy

Contact Info

Product

Resources

About