Air filtration performance enhancement of PTFE foam–coated filters at high temperatures via secondary strongly adhering PTFE nanofiber coatings

Ahn, Seunghwan; Shim, Euijin; Kim, Yeonsang; Bae, Youn‐Sang; Eom, Hyo J.

doi:10.1016/j.psep.2022.04.067

Cited by 17 publications

(6 citation statements)

References 44 publications

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“…It can be seen that the crystalline grains appear on the surface, and part of the pores is blocked by these crystalline grains (Figure 5c), which causes a rapid decrease in the evaporative rate. The water contact angle on the failed PTFE-ceramic aeration membrane is measured again and decreases to 0 • , implying that the PTFE modifier peels off from the membrane due to the non-stick characteristics of PTFE [24,25]. The binding between PTFE and the ceramic membrane is not strong, and the PTFE modifier is easy to peel off, which leads to the failure of the PTFE-ceramic aeration membrane.…”

Section: Effect Of Hydrophobic Modifier On Working Stabilitymentioning

confidence: 99%

Hydrophobic Modified Ceramic Aeration Membrane for Effective Treatment of Brine Wastewater

Zhang

Jiang

2023

Membranes

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A novel approach to evaporate brine wastewater using a ceramic aeration membrane was proposed. A high-porosity ceramic membrane was selected as the aeration membrane and was modified with hydrophobic modifiers to avoid undesired surface wetting. The water contact angle of the ceramic aeration membrane reached 130° after hydrophobic modification. The hydrophobic ceramic aeration membrane showed excellent operational stability (up to 100 h), high salinity (25 wt.%) tolerance, and excellent regeneration performance. The evaporative rate reached 98 kg m−2 h−1, which could be restored by ultrasonic cleaning after the membrane fouling occurred. Furthermore, this novel approach shows great promise for practical applications toward a low cost of only 66 kW·h·m−3.

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Section: Effect Of Hydrophobic Modifier On Working Stabilitymentioning

confidence: 99%

Hydrophobic Modified Ceramic Aeration Membrane for Effective Treatment of Brine Wastewater

Zhang

Jiang

2023

Membranes

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“…9 In addition to fire protection, fireproof coatings also need to have excellent water resistance, mechanical properties, and other properties to withstand the environment and the shock waves caused by explosions. [10][11][12] The addition of fillers is an effective way to enhance the performance of fireproof coatings. A smaller amount of fillers can produce a positive impact on the properties of the fireproof coatings.…”

Section: Introductionmentioning

confidence: 99%

“…However, the unique environment of chemical enterprises requires higher standards for fireproof coatings 9 . In addition to fire protection, fireproof coatings also need to have excellent water resistance, mechanical properties, and other properties to withstand the environment and the shock waves caused by explosions 10–12 . The addition of fillers is an effective way to enhance the performance of fireproof coatings.…”

Section: Introductionmentioning

confidence: 99%

Effects of biomaterial on the properties of waterborne intumescent fireproof coatings

Zhan,

Mo,

Feng

et al. 2024

J of Applied Polymer Sci

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Silk fibroin was used to enhance the properties of the fireproof coating, ensuring the safe evacuation of occupants in a fire accident. The effects of biomaterial on the properties of the coatings were investigated by fire protection test, thermogravimetric analysis, limited oxygen index, vertical flame test, water resistance test, and mechanical properties test. The carbon layers were characterized after the fire protection test by scanning electron microscopy, energy dispersive spectroscopy, X‐ray diffraction, and Fourier transform infrared spectroscopy to analyze the microstructure and chemical composition. The results show that the coating with 6% SF demonstrated the best fire protection, thermal stability, and water resistance. The temperature on the backside is only 255.9°C, and the residual weight is 37.52%. However, the coating with 4% SF exhibits good mechanical properties.

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“…1 As a key part of the bag-house, fibrous filters, typically needle punched nonwoven fabrics with excellent air permeability and various fiber sources, are widely used in the industrial air filtration fields to remove dust particles in the flue gas. [2][3][4][5] However, fibrous filters such as needle punched nonwoven fabrics have poor removal efficiency although they have high porosity (>70%) and low pressure drop. 6,7 To meet the emission requirement lower than 5 mg/m 3 , continuous efforts have been made to improve the filtration performance of filter bags.…”

Section: Introductionmentioning

confidence: 99%

Novel filter material by glass fiber foam laying for nonwoven fabrics

Wang,

Chen,

Chen

et al. 2023

Journal of Industrial Textiles

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The needle punched nonwoven fabrics are widely used as the flue gas filter materials while continuous efforts have been made to improve the filtration efficiency in order to meet the low emission requirement. In this study, filter materials with high filtration efficiency were developed via glass fiber foam laying and PTFE (polytetrafluoroethylene) emulsion coating process. Influences of surfactant type, fiber diameter and fiber content on the foam-ability and foam stability of glass fibers were analyzed. The resulting filter materials, obtained here for the first time with glass fiber foam laden and PTFE emulsion coated needle punched nonwoven fabrics, were characterized for morphology, pore size, air permeability, wear resistance and filtration properties. The results were compared against structures obtained from needle punched nonwoven fabrics before and PTFE emulsion coating. Remarkably, compared to untreated and PTFE emulsion coated needle punched nonwoven fabrics, the glass fiber foam laden and PTFE emulsion coated fabrics displayed higher filtration efficiency and lower outlet particle concentration. Overall, glass fiber foam laying is found to be effective to improve the filtration performance of needle punched nonwoven fabrics and is promising to be commercialized after optimizing the foam composition and PTFE emulsion coating process.

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Air filtration performance enhancement of PTFE foam–coated filters at high temperatures via secondary strongly adhering PTFE nanofiber coatings

Cited by 17 publications

References 44 publications

Hydrophobic Modified Ceramic Aeration Membrane for Effective Treatment of Brine Wastewater

Hydrophobic Modified Ceramic Aeration Membrane for Effective Treatment of Brine Wastewater

Effects of biomaterial on the properties of waterborne intumescent fireproof coatings

Novel filter material by glass fiber foam laying for nonwoven fabrics

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