Electrospun polyetherimide/zeolitic imidazolate framework nanofibrous membranes for enhanced air filtration performance under high temperature and high humidity conditions

Zhou, Changzhe; Han, Wenjing; Yang, Xingda; Fan, Hongwei; Li, Chunxi; Dong, Liangliang; Meng, Hong

doi:10.1016/j.cej.2021.134069

Cited by 43 publications

(18 citation statements)

References 47 publications

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“…This phenomenon proved that the electrostatic effects played a more critical role in capturing small particles . Furthermore, with the increase in filter thickness, the influence of relative humidity became negligible (as shown in Figure b, c), especially for the PAN/ZIF-67 filters with an electrospinning time of 3 h. This was because when the filters became thicker, the other mechanisms (e.g., interception, inertial impaction, diffusion) gradually dominated the particle filtration process . In addition, the pressure drop of all PAN/ZIF-67 hybrid nanofiber filters showed negligible changes with the increase in humidity (Figure d).…”

Section: Resultsmentioning

confidence: 85%

“…As shown in Figure a, the filtration efficiency of particles with small sizes (0.3–0.4 μm) exhibited a noticeable reduction with the increase in relative humidity, from 54% (40% RH) to 30% (80% RH). This result indicated that the high humidity weakened the performance of PAN/ZIF-67 filters, mainly by impairing the electrostatic interaction between the particles and the nanofibers . However, the influence of relative humidity gradually diminished with the increase in particle size.…”

Section: Resultsmentioning

confidence: 95%

“…52 Furthermore, with the increase in filter thickness, the influence of relative humidity became negligible (as shown in Figure 7b, c), especially for the PAN/ ZIF-67 filters with an electrospinning time of 3 h. This was because when the filters became thicker, the other mechanisms (e.g., interception, inertial impaction, diffusion) gradually dominated the particle filtration process. 51 In addition, the pressure drop of all PAN/ZIF-67 hybrid nanofiber filters showed negligible changes with the increase in humidity (Figure 7d). In summary, the negative effect of high humidity on the particle filtration efficiency of PAN/ZIF-67 hybrid nanofiber filters should be considered in practical applications, especially for thin filters used for capturing small particles.…”

Section: Influence Of Zif-67mentioning

confidence: 94%

“…This result indicated that the high humidity weakened the performance of PAN/ZIF-67 filters, mainly by impairing the electrostatic interaction between the particles and the nanofibers. 51 However, the influence of relative humidity gradually diminished with the increase in particle size. This phenomenon proved that the electrostatic effects played a more critical role in capturing small particles.…”

Section: Influence Of Zif-67mentioning

confidence: 99%

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Investigating the Influence of Metal–Organic Framework Loading on the Filtration Performance of Electrospun Nanofiber Air Filters

Niu

Xiao

et al. 2022

ACS Appl. Mater. Interfaces

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Integrating metal–organic frameworks (MOFs) into electrospun nanofiber filters has become an effective method for improving particle filtration efficiency. This study hypothesized that there is an optimal amount of MOFs that can be integrated into electrospun nanofiber filters to achieve the maximum particle removal efficiency while minimizing the corresponding MOF synthesis time. To test the hypothesis, this study systematically explored the influence of the time-dependent in situ growing process of zeolitic imidazolate framework-67 (ZIF-67), a typical type of MOFs, on the filtration performance of polyacrylonitrile (PAN) electrospun nanofibers. The results show that the surface morphology and chemical composition of the PAN/ZIF-67 hybrid nanofiber filters gradually changed with the reaction time. For PAN/ZIF-67 hybrid nanofiber filters with relatively low initial PM0.3–0.4 filtration efficiency, a reaction time of only 5 min was sufficient for the synthesis of the amount of ZIF-67 that maximized the PM0.3–0.4 filtration efficiency. However, for thick filters with high original PM0.3–0.4 filtration efficiency (>90%), the integration of ZIF-67 was not necessary, because the efficiency enhancement would not be significant. In addition, the enhancement of filtration efficiency for ultrafine particles was positively correlated with the amount of incorporated ZIF-67. In summary, this study shortened the synthesis time of the in situ incorporation of MOFs into electrospun nanofiber filters from more than 10 h (reported in the literature) to only 5 min.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 95%

Section: Influence Of Zif-67mentioning

confidence: 94%

Section: Influence Of Zif-67mentioning

confidence: 99%

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Investigating the Influence of Metal–Organic Framework Loading on the Filtration Performance of Electrospun Nanofiber Air Filters

Niu

Xiao

et al. 2022

ACS Appl. Mater. Interfaces

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“…Moreover, there are many kinds of materials available for electrospinning, including various polymers, small molecules, ceramics and so on, which makes it possible to quickly prepare nanofibers with various structures and functions [20] , [21] , [22] , [23] , [24] . Thus, more and more electrospun nanofibrous membrane are manufactured to realize high–performance air filtration and used for personal protection [25] , [26] , [27] .…”

Section: Introductionmentioning

confidence: 99%

High-performance multifunctional electrospun fibrous air filter for personal protection: A review

Shao

Chen²,

Wang³

et al. 2022

Separation and Purification Technology

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A highly integrated ceramic membrane‐based reactor for intensifying the biomass gasification to clean syngas

Wei,

Zhou,

Ding

et al. 2024

AIChE Journal

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Biomass gasification for syngas production is a key operating unit in the biomass utilization process. However, its overall efficiency and stability are often restricted by the presence of complex impurities, including particulate matters (PMs) and tars. In this study, a highly integrated ceramic membrane‐based reactor was developed for high‐temperature syngas cleaning, enabling the efficient in situ removal of PMs and tars from bio‐vapors produced by biomass gasification. Specifically, a silicon carbide (SiC) membrane could separate PMs from biomass volatiles in situ, while a structured Ni15La5/S1‐SiC catalyst (nickel and lanthanum‐laden silicalite‐1 zeolite supported on SiC foam) facilitated the catalytic reforming of tars. Compared to other control reactors (i.e., those containing either a membrane or catalyst alone), the integrated reactor showed synergistic intensification in producing clean syngas from biomass gasification, achieving PM and tar removal efficiencies of up to ~97% and ~90%, and exhibited excellent stability in five‐cycle evaluations at 800°C.

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Electrospun polyetherimide/zeolitic imidazolate framework nanofibrous membranes for enhanced air filtration performance under high temperature and high humidity conditions

Cited by 43 publications

References 47 publications

Investigating the Influence of Metal–Organic Framework Loading on the Filtration Performance of Electrospun Nanofiber Air Filters

Investigating the Influence of Metal–Organic Framework Loading on the Filtration Performance of Electrospun Nanofiber Air Filters

High-performance multifunctional electrospun fibrous air filter for personal protection: A review

A highly integrated ceramic membrane‐based reactor for intensifying the biomass gasification to clean syngas

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