Dual-bionic, fluffy, and flame resistant polyamide-imide ultrafine fibers for high-temperature air filtration

Hua, Yuezhen; Li, Yuyao; Ji, Zekai; Cui, Wang; Wu, Zheng; Fan, Jie; Liu, Yong

doi:10.1016/j.cej.2022.139168

Cited by 26 publications

(15 citation statements)

References 53 publications

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“…The quality factor ( QF ) of NF@CNT air filters can be defined as follows: 38 where C up and C down represent the concentration of NaCl aerosols before and after crossing the air filter holder, respectively. Δ P refers to the pressure drop crossing the air filter holder.…”

Section: Methodsmentioning

confidence: 99%

An ultrafine spider-like carbon nanonet for high performance air filters, health monitoring sensors, and green energy generators

Xiong,

Xia,

Guo

et al. 2023

J. Mater. Chem. A

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Section: Methodsmentioning

confidence: 99%

An ultrafine spider-like carbon nanonet for high performance air filters, health monitoring sensors, and green energy generators

Xiong,

Xia,

Guo

et al. 2023

J. Mater. Chem. A

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“…28−30 The electrospun membrane of PI can easily be fabricated either from its precursor or polymer solutions. 31,32 Liu et al recently fabricated a superhydrophobic electrospun PI modified with polydopamine for oil/water separation. 33 The membrane demonstrated an extremely high efficiency of over 99% after 10 recyclability tests.…”

Section: Introductionmentioning

confidence: 99%

“…Polyimide (PI) and polyamide-imide (PAI) are two well-known imide-containing polymers used for membrane manufacturing . PIs have extensively been studied as air filters, battery separators, and membranes in the form of foams, aerogels, and hollow fiber composites. − The electrospun membrane of PI can easily be fabricated either from its precursor or polymer solutions. , Liu et al recently fabricated a superhydrophobic electrospun PI modified with polydopamine for oil/water separation . The membrane demonstrated an extremely high efficiency of over 99% after 10 recyclability tests.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophilic Electrospun Polyamide-Imide Membranes for Efficient Oil/Water Separation under Gravity

Gurave,

Rastgar,

Mizan

et al. 2023

ACS Appl. Eng. Mater.

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The efficient separation of oil/water mixtures by membrane technology is highly dependent on the performance of membrane materials. The emergence of electrospinning has opened up opportunities for designing super porous structures with excellent oil/water separation efficiency. Herein, we prepared electrospun nanofibrous membranes using a highly hydrophilic and thermomechanically stable polyamide-imide (PAI) polymers. The fabricated membranes by a set of optimized electrospinning processes were examined in the gravity-driven separation of various oil/water emulsions. The effect of polymer concentration on fiber diameter and porosity of membranes was evaluated. It was observed that increasing the PAI concentration in the electrospinning dope resulted in the fabrication of membranes with larger fibers and a larger pore size. The fiber diameter and thus, the porosity and pore size of the membrane influenced the flux and separation efficiency during filtration. The membrane with a 12% PAI concentration (EM1) showed a lower flux, whereas the 21% PAI membrane (EM4) offered a higher flux but lower separation efficiency. The membranes exhibited excellent underwater antioil adhesion behavior by completely repelling n-hexane, mineral oil, n-hexadecane, and gasoline droplets from their prewetted surfaces. Compared to other membranes, the 15% PAI membrane (EM2) was found to strike a balance between water flux and oil rejection while also exhibiting strong resistance to oil fouling, as evidenced by its relatively lower flux decline (FD) and higher flux recovery ratio (FRR) when filtering various emulsions. The EM2 membrane demonstrated an excellent pure water flux of 800 to 900 L/m 2 h (LMH) and an emulsion flux of 380 to 410 LMH. The FRR and oil rejection of the membrane were 91−97 and >99%, respectively. Moreover, the prepared membrane was stable at pH 3 to 9 with a consistent separation performance. The EM2 membrane was also utilized for n-hexane/water emulsion separation in cyclic tests and provided stable oil rejection and FRR after 10 cycles, demonstrating the high potential of this membrane in real oil/water emulsion separation processes.

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“…Composite yarns are used primarily in the production of filtration products as well as in the health sector , and the textile industry for the production of clothing. , However, they can be further modified so as to enhance their application potential, particularly via their combination with other high-surface-area components such as activated carbon (so as to increase their filtration properties). , For filter applications, it is possible to use, for example, the widely used polyamide , or polyvinyl butyral . Their potential application in the health sector includes the creation of nanofibrous surgical suture sheaths enriched with antibiotic particles aimed at preventing the spread of microorganisms due to, for example, anastomotic leakage. , Yarns can be modified via either the grafting of specific molecules onto the fibers or the addition of functional particles directly to the spinning solution, the main disadvantage of which is that the particles may not be spun together with the polymer solution and that the spun particles become encapsulated within the polymer fiber. , Moreover, the incorporation of particles into the fiber surface involves the risk that the particles may stick to the surface of the yarn and may come loose.…”

Section: Introductionmentioning

confidence: 99%

“… 17 , 18 However, they can be further modified so as to enhance their application potential, 19 particularly via their combination with other high-surface-area components such as activated carbon (so as to increase their filtration properties). 20 , 21 For filter applications, it is possible to use, for example, the widely used polyamide 22 , 23 or polyvinyl butyral. 24 Their potential application in the health sector includes the creation of nanofibrous surgical suture sheaths enriched with antibiotic particles aimed at preventing the spread of microorganisms due to, for example, anastomotic leakage.…”

Section: Introductionmentioning

confidence: 99%

Production of Modified Composite Nanofiber Yarns with Functional Particles

et al. 2022

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The study focused on the production of modified composite nanofiber yarns with fine functional particles. A device that incorporates fine functional particles into a nanofiber yarn wrapper was specially developed, which ensures the continuous production of modified yarn. It was demonstrated during the study that the specially designed equipment could be used effectively for incorporating fine functional particles into the nanofiber packaging, thus creating a unique yarn with high application potential. The use of particles with dimensions of just tens of micrometers results in the uneven flow of particles inside the chamber and the uneven supply of particles to the composite yarn. The study also determined that the number of particles incorporated into the composite yarn is affected by the particle concentration and the variation of the vortex velocity ratios in the chamber. During testing, it was also found that the nanofiber sheet of the composite yarn improves the mechanical properties of the produced yarn. In addition, the study included the semi-industrial production of a composite filter candle, which can be used for the treatment of fluids, especially air and water.

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Dual-bionic, fluffy, and flame resistant polyamide-imide ultrafine fibers for high-temperature air filtration

Cited by 26 publications

References 53 publications

An ultrafine spider-like carbon nanonet for high performance air filters, health monitoring sensors, and green energy generators

An ultrafine spider-like carbon nanonet for high performance air filters, health monitoring sensors, and green energy generators

Superhydrophilic Electrospun Polyamide-Imide Membranes for Efficient Oil/Water Separation under Gravity

Production of Modified Composite Nanofiber Yarns with Functional Particles

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