Mechanical, thermal, and morphological properties of nanoporous reinforced polysulfone membranes

Pouresmaeel-Selkjani, Peyman; Jahanshahi, Mohsen; Peyravi, Majid

doi:10.1177/0954008316656742

Cited by 14 publications

(4 citation statements)

References 42 publications

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“…19 As the fiber loading increased, more traces of void and cavities were observable in the uncompatibilized composites. 4 The existence of void in the composites decreased the mechanical strength 25,26 due to the increase in fiber agglomeration which creates regions of stress concentrations that require less energy to initiate cracks. 19…”

Section: Resultsmentioning

confidence: 99%

Physico-thermal properties of kenaf fiber/high-density polyethylene/maleic anhydride compatibilized composites

Salleh

Hassan

Yahya

et al. 2018

High Performance Polymers

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Kenaf fiber/high-density polyethylene/maleic anhydride (MA)-compatibilized composites were melt mixed in a twin-screw extruder and molded using injection molding machine. Physicothermal properties of the composites were studied at different percentages of compatibilizer contents using various techniques. The addition of 8% compatibilizer into 8.5 and 17.5 wt% fiber content improved the adhesion and tensile strength by 14.5% and 13.6%, respectively. Compatibilized samples exhibited higher peak load and fracture energy on impact testing compared to the samples without maleic anhydride compatibilizer. The effect of the addition of maleic anhydride compatibilizer on peak load and fracture energy was observed to be at its highest at 8%. Differential scanning calorimetric measurements revealed that the melting enthalpy and degree of crystallinity of composites increased with increasing compatibilizer content up to 8% and then decreased at 12% compatibilizer content. Dynamic mechanical analysis showed that the storage modulus of composites was increased, but the loss modulus and tangent delta were decreased after the addition of compatibilizer. This indicates that compatibilized composites produced have improved toughness and reduced stiffness.

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Section: Resultsmentioning

confidence: 99%

Physico-thermal properties of kenaf fiber/high-density polyethylene/maleic anhydride compatibilized composites

Salleh

Hassan

Yahya

et al. 2018

High Performance Polymers

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“…Among those polymeric membranes, PSF is an ideal choice for membrane development due to its availability, chemical stability and high mechanical strength and can be used in a wide range of temperature and pH levels [34,35]. PSF has a tensile strength between 78 and 83 MPa; hence, it exhibits excellent mechanical properties that favor its usage as a membrane in wastewater treatment [36]. However, hydrophobicity is considered to be a disadvantage of PSF membranes, as it contributes to membrane fouling [37,38].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity of Silver Nanoflake (SNF)-Blended Polysulfone Ultrafiltration Membrane

Prihandana

Sriani²,

Muthi’ah

et al. 2022

Polymers

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The aim of this research was to study the possibility of using silver nanoflakes (SNFs) as an antibacterial agent in polysulfone (PSF) membranes. SNFs at different concentrations (0.1, 0.2, 0.3 and 0.4 wt.%) were added to a PSF membrane dope solution. To investigate the effect of SNFs on membrane performance and properties, the water contact angle, protein separation, average pore size and molecular weight cutoffs were measured, and water flux and antibacterial tests were conducted. The antimicrobial activities of the SNFs were investigated using Escherichia coli taken from river water. The results showed that PSF membranes blended with 0.1 wt.% SNFs have contact angles of 55°, which is less than that of the pristine PSF membrane (81°), exhibiting the highest pure water flux. Molecular weight cutoff values of the blended membranes indicated that the presence of SNFs does not lead to enlargement of the membrane pore size. The rejection of protein (egg albumin) was improved with the addition of 0.1 wt.% SNFs. The SNFs showed antimicrobial activity against Escherichia coli, where the killing rate was dependent on the SNF concentration in the membranes. The identified bacterial colonies that appeared on the membranes decreased with increasing SNF concentration. PSF membranes blended with SNF, to a great degree, possess quality performance across several indicators, showing great potential to be employed as water filtration membranes.

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“…In order to introduce the endothermic peak of the DSC curve, it can be noted that the MWCNTs‐U roles as filler, locks the UF resin chains and catches the free formaldehyde of the resin, 46,49 therefore the endothermic peak of water and formaldehyde evaporation became smaller with incorporation of more MWCNTs‐U because of less energy requirement for lower formaldehyde content evaporation.…”

Section: Resultsmentioning

confidence: 99%

Urea impregnated multiwalled carbon nanotubes; a formaldehyde scavenger for urea formaldehyde adhesives and medium density fiberboards bonded with them

Mazaheri

Moghimi

Taheri

2021

J of Applied Polymer Sci

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Multiwalled carbon nanotubes (MWCNTs) were subjected to modification by urea to use as formaldehyde scavenger in urea formaldehyde (UF) adhesive and reducing the free formaldehyde emission of the medium density fiberboards (MDFs). Morphological differences besides elemental analysis was investigated using field emission scanning electron microscopy (FESEM) and energy dispersive X‐ray spectroscopy. The effect of urea impregnated MWCNTs filler on the physical, morphological and thermal properties of the UF resin has investigated. Furthermore, characterization of the mechanical properties, free formaldehyde emission and thickness swelling were carried out for the MDF panels. From the results, the free formaldehyde of the UF resins was significantly decreased. The lowest free formaldehyde was belonged to the sample with 3 wt% of scavenger which was about 71% lower than the value for neat UF resin. Accordingly, the formaldehyde emission of the fiberboards was also showed a descending trend by incorporation of MWCNTs‐U to the composite structure. It was decreased from 9.67 to 3.89 mg/100 g dried board. These results indicated that the prepared nano modifier was successfully performed as a formaldehyde scavenger for the UF resin and could prevent the hazards of the free formaldehyde emission from MDF panels.

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Mechanical, thermal, and morphological properties of nanoporous reinforced polysulfone membranes

Cited by 14 publications

References 42 publications

Physico-thermal properties of kenaf fiber/high-density polyethylene/maleic anhydride compatibilized composites

Physico-thermal properties of kenaf fiber/high-density polyethylene/maleic anhydride compatibilized composites

Antibacterial Activity of Silver Nanoflake (SNF)-Blended Polysulfone Ultrafiltration Membrane

Urea impregnated multiwalled carbon nanotubes; a formaldehyde scavenger for urea formaldehyde adhesives and medium density fiberboards bonded with them

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