scholarly journals Numerical Investigation of Fabricated MWCNTs/Polystyrene Nanofibrous Membrane for DCMD

Polymers ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 160
Author(s):  
Asmaa Elrasheedy ◽  
Mohammed Rabie ◽  
Ahmed El-Shazly ◽  
Mohamed Bassyouni ◽  
S.M.S. Abdel-Hamid ◽  
...  
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Composite Membrane ◽  
Composite Membranes ◽  
Membrane Distillation ◽  
Nanofibrous Membrane ◽  
Permeate Flux ◽  
Water Contact ◽  
Static Water Contact Angle ◽  
Static Water

The effect of compositing multiwalled carbon nanotubes (MWCNTs) with polystyrene (PS) to fabricate nanofibrous membrane by electrospinning technique and comparing the direct contact membrane distillation (DCMD) performance of the blank and composite membranes is evaluated numerically. Surface morphology of both the pristine and the composite membrane was studied by SEM imaging while the average fiber diameter and average pore size were measured using ImageJ software. Static water contact angle and porosities were also determined for both membranes. Results showed significant enhancement in both the hydrophobicity and porosity of the composite membrane by increasing the static water contact angle from 145.4° for the pristine PS membrane to 155° for the PS/MWCNTs composite membrane while the porosity was increased by 28%. Simulation results showed that at any given feed inlet temperature, the PS/MWCNTs membrane have higher permeate flux and better overall system performance.

scholarly journals Development of Superhydrophobic Polyester (Polyethylene terephthalate) Fabric for Multiple Applications

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Subhas Ghosh ◽  
Roopkatha Pallye
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Polyester Fabric ◽  
Ftir Analysis ◽  
Water Contact ◽  
Abrasion Test ◽  
Static Water Contact Angle ◽  
Static Water ◽  
Polyester Textile ◽  
Textile Fabric

This study intended to develop a healthy and environmentally friendly super-hydrophobic PET polyester textile fabric using a specific Fluoro Silane finish (SHF). A novel SHF was prepared and applied on a polyester fabric using a pad-dry-cure method. The finished fabric was evaluated for the degree of hydrophobicity, durability and stain repellence. The finished fabric exhibited static water contact angle greater than 170o and received 90 AATCC (4 ISO) rating that is recognized as super-hydrophobicity and this property was maintained even after a 50,000-cycle abrasion test. FTIR analysis identified the characteristic peaks related to Si-O-Si and C-F asymmetric stretching bands of the finish on the fabric indicating a robust attachment on the fabric. Finished fabric did not show any change in appearance or tactile characteristics of the fabric. 

Antigen detection with thermosensitive hydrophilicity of poly(N-isopropylacrylamide)-grafted poly(vinyl chloride) fibrous mats

2018 ◽  
Vol 6 (21) ◽  
pp. 3486-3496 ◽  
Author(s):  
Jian-Wei Guo ◽  
Zhen-Yu Lin ◽  
Bohr-Ran Huang ◽  
Chien-Hsing Lu ◽  
Jem-Kun Chen
Keyword(s):  
Contact Angle ◽  
Vinyl Chloride ◽  
Water Contact Angle ◽  
Antigen Detection ◽  
Stimuli Responsive ◽  
Water Contact ◽  
Static Water Contact Angle ◽  
Poly Vinyl Chloride ◽  
Static Water

The static water contact angle of stimuli-responsive fibrous mats is used as a convenient index for rapid antigen detection.

On Antireflective Coatings with Stable Hydrophobicity for Solar Tube

2013 ◽  
Vol 423-426 ◽  
pp. 443-447 ◽  
Author(s):  
Wen Wen Dou ◽  
Yu Chao Niu ◽  
Xiang Ju Liu ◽  
Xiao Li Wang ◽  
Yong Xu
Keyword(s):  
Contact Angle ◽  
Low Temperature ◽  
Water Contact Angle ◽  
Prolonged Exposure ◽  
Sol Gel ◽  
High Porosity ◽  
Antireflective Coatings ◽  
Water Contact ◽  
Static Water Contact Angle ◽  
Static Water

Antireflective coatings with stable hydrophobicity for solar tube were prepared via sol-gel method and hexamethyldisilazane (HMDS) treatment. The coatings have a high porosity, groove-like surface morphology and a big static water contact angle. As a result, the coatings exhibit high transmittance even in high humidity environments. The transmittance peak can reach up to 99.02% which increased by 7% compared with the substrate and the wavelength band increased by more than 5% is from 438nm to 1000nm. After prolonged exposure to strong ultraviolet (UV) irradiation, the static water contact angle of the HMDS treated antireflective coatings decreased very small from 102o to 98o. In addition, the low-temperature tests showed the contact angle did not decline even at-50°C. The results suggest that the coatings prepared in present paper have stable hydrophobic and antireflective performance in the environment of strong UV radiation and low temperature.

Investigation of Different Membrane Porosities on the Permeate Flux of Direct Contact Membrane Distillation

2021 ◽  
Vol 889 ◽  
pp. 85-90
Author(s):  
Asmaa Elrasheedy ◽  
Mohammed Rabie ◽  
Ahmed Hassan El-Shazly ◽  
Mohamed Bassyouni ◽  
Ahmed Abd El-Moneim ◽  
...  
Keyword(s):  
Contact Angle ◽  
Direct Contact ◽  
Solution Concentration ◽  
Membrane Distillation ◽  
Permeate Flux ◽  
Hydrophobic Property ◽  
Water Contact ◽  
Direct Contact Membrane Distillation ◽  
Static Water ◽  
Membrane Porosity

In the present study the surface morphology of electrospun fibers at different polystyrene (PS) solution concentration was studied by SEM imaging to determine the best PS solution concentration yielding continuous uniform beadles fibers. Contact angle measurements of the optimum fabricatedPS-18 membrane confirmed the super hydrophobic property of the membrane that exhibited a static water contact angle of 145o. Numerical investigation of the performance of PS-18 membrane at different membrane thicknesses and porosities on direct contact membrane distillation showed that increasing the membrane porosity increases the permeate flux considerably.

scholarly journals Surface treated cotton fabric with stain repellent property for the use in aircraft upholstery

2021 ◽  
Vol 16 ◽  
pp. 155892502110051
Author(s):  
Kuruppu Achchige Dulani Daminda Kuruppu
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Cotton Fabric ◽  
Textile Industry ◽  
Water Contact ◽  
Wrinkle Resistance ◽  
Static Water Contact Angle ◽  
Before And After ◽  
Static Water ◽  
Afm Micrographs

Nanotechnology modifications play a major role in textile industry due to extraordinary properties exhibit in fabrics due to nanomaterials. It offers different functionalities namely self-cleaning, wrinkle resistance, flame retardancy, protection from UV radiations or antibacterial property. Further, it is important to maintain cleanliness in aircraft upholstery always but the airliners have to bear a considerable amount of money to clean up the aircraft upholstery. Interestingly, nanotechnology can provide stain repellence property for fabrics in aircraft upholstery. This study covers a method of developing a stain repellent fabric which was stable even after 25 standard laundering conditions. In this study nanotechnology was used to modify a cotton fabric with stain repellant property. After nanotechnology modification, the surface wettability of the treated fabrics was characterized by static water contact angle measurements before and after 25 washes carried out under standard laundering conditions. Similar testings were carried out for the untreated fabric samples. The static water contact angle for the treated fabric was 161° with the recovery of 97.5% after 25 washing cycles. SEM and AFM micrographs were used to analyze the coatings. Further, the stability of hydrophobicity in the modified cotton fabric after 25 washes was also tested for tea, coffee, and water solutions which are vulnerable stain types in aircraft upholstery. It clearly proved that the modified cotton fabric even after 25 washes showed hydrophobicity for tea, coffee, and water. Therefore, it could be concluded that the developed modified cotton fabric can consider to be used as an aircraft upholstery.

scholarly journals Fabrication of a Novel Antifouling Polysulfone Membrane with in Situ Embedment of Mxene Nanosheets

2019 ◽  
Vol 16 (23) ◽  
pp. 4659 ◽  
Author(s):  
Zhen Shen ◽  
Wei Chen ◽  
Hang Xu ◽  
Wen Yang ◽  
Qing Kong ◽  
...  
Keyword(s):  
Contact Angle ◽  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Water Contact Angle ◽  
Bovine Serum ◽  
Composite Membranes ◽  
Recovery Ratio ◽  
Water Contact ◽  
Polysulfone Membrane

Membrane fouling is still a critical issue for the application of ultrafiltration, which has been widely used in water treatment due to its efficiency and simplicity. In order to improve the antifouling property, a new 2D material MXene was used to fabricate composite ultrafiltration membrane with the approach of in situ embedment during the phase inversion process in this study. Scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), water contact angle, bovine serum albumin rejection and porosity measurements were utilized to characterize the prepared membranes. Due to the hydrophilicity of the MXene, the composite membranes obtained higher hydrophilicity, confirmed by the decreased water contact angle. All the modified membranes had a high bovine serum albumin rejection above 90% while that of the pristine polysulfone membrane was 77.48%. The flux recovery ratio and the reversible fouling ratio of the membranes were also improved along with the increasing content of the MXene. Furthermore, the highest flux recovery ratio could also reach 76.1%. These indicated the good antifouling properties of MXene composite membranes. The enhanced water permeability and protein rejection and excellent antifouling properties make MXene a promising material for antifouling membrane modification.

Sign in / Sign up

Export Citation Format

Share Document