Hybrid adsorbent nonwoven structures: a review of current technologies

Amid, Hooman; Mazé, Benoît; Flickinger, Michael C.; Pourdeyhimi, Behnam

doi:10.1007/s10853-016-9741-x

Cited by 27 publications

(22 citation statements)

References 228 publications

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“…They were attached to elementary fibres but not embedded in their structure, which is important because the deposition of carbon adsorbent in the nonwoven structure can significantly impact the sorption properties of the material. This is due to the fact that the presence of binding substances or embedding carbon granules in polymer material may lead to micropore blocking, limiting the resulting capacity of carbon material [38].…”

Section: Resultsmentioning

confidence: 99%

“…35% of the specific surface area of the extracted AC, which is due to the high content of non-porous polymer fibres in the tested samples [14]. Lower textural parameters obtained for AC-NW media could have also resulted from blocking of adsorbent pores by the adhesives used in the nonwoven impregnation process [38]. Pore size distribution of AC and AC-NW composite (Figure 5) indicated that the size of most of the pores ranged from 0.5 to 2.0 nm with two peaks at approx.…”

Section: Resultsmentioning

confidence: 99%

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Adsorption Performance of Activated-Carbon-Loaded Nonwoven Filters Used in Filtering Facepiece Respirators

Okrasa

Hitz

Nowak

et al. 2019

IJERPH

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Filtering nonwovens loaded with activated carbon are among the most popular materials used in the construction of filtering facepiece respirators (FFRs) with anti-odour properties that can be used for respiratory protection at workplaces where the occupational exposure limits of harmful substances are not exceeded. Such FFRs, in addition to a polymer filter material of varying effectiveness, also contain a layer of activated-carbon-loaded nonwoven filter, which limits the quantity of chemical compounds entering the breathing zone. The aim of this work was to analyse the influence of challenge concentration (20–120 ppm), relative humidity (2–70%), flow rate (20–55 L/min), and flow pattern (steady-state and pulsating) on the breakthrough of polymer/carbon nonwovens. A commercial activated-carbon-loaded nonwoven filter was used in this study. Its morphology and textural parameters were determined using optical microscopy, image processing, and nitrogen adsorption/desorption measurements at 77 K. Breakthrough experiments were carried out using cyclohexane vapours to assess adsorption characteristics of polymer/carbon media. The results showed that the breakthrough times decreased with increasing challenge concentration (up to 30%), relative humidity (up to 73%), and flow rate (up to 72%). The pulsating flow pattern was found to be more favourable in terms of odour reduction efficiency (up to 30%). The results indicate that all of these factors should be considered during selection and performance assessment of respirators used for odour relief.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Adsorption Performance of Activated-Carbon-Loaded Nonwoven Filters Used in Filtering Facepiece Respirators

Okrasa

Hitz

Nowak

et al. 2019

IJERPH

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Section: Introductionmentioning

confidence: 99%

“…Wet-laid nonwoven media are capable of uniform immobilization of adsorbent particles sized 1 to 80 microns [31]. When using fibrillated fibers, more adsorbent particles can be immobilized due to mechanical interlocking action of fibrillated fibers [31,32]. The most competitive advantage of the wet-laid process is the absence of adhesives or melt binding compared to the previous process, resulting in ideal (not shielded) pore structure of the additive adsorbents [31].…”

Section: Introductionmentioning

confidence: 99%

“…When using fibrillated fibers, more adsorbent particles can be immobilized due to mechanical interlocking action of fibrillated fibers [31,32]. The most competitive advantage of the wet-laid process is the absence of adhesives or melt binding compared to the previous process, resulting in ideal (not shielded) pore structure of the additive adsorbents [31]. Unit per hour tends to be as short as that of papermaking processes and the absence of various chemicals makes it environment friendly [33].…”

Section: Introductionmentioning

confidence: 99%

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Zeolite and short-cut fiber-based wet-laid filter media for particles and heavy metal ion removal of wastewater

Sun

Noh

Choi

et al. 2019

Journal of Industrial Textiles

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As development of industrialization grows constantly, the purification of hazardous solid particles and ions is one of the most important topics in environment and ecosystem. In this report, we designed and developed a novel and advanced type of filter media for the removal of both solid particles and hazardous ions, we choose Cs+ and Ca2+ here, by enclosing zeolite in wet-laid nonwoven media. The performance of the prepared filter media was evaluated by continuous sorption experiments, which were followed by solid particles and ion-removal efficiency studies. The prepared filter media showed excellent uniformity. The prepared filter media exhibited a solid removal efficiency rate which ranged from 80 to 82%, and the initial removal efficiency of ions exceeded 99%. These values are in effect as the main layer in the completed liquid filter media and for the next step to prepare the completed multi-layered liquid filter units. The results here suggest that this novel filter media can be used in high-efficiency and multi-functional liquid filter units for residential and industrial engineering.

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Metal‐Organic Framework Based Polymer Fibers: Review on Synthesis and Applications

Zhou

Wang

Shi

et al. 2023

Adv Materials Technologies

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A composite material with improved characteristics can be produced by combining metal‐organic frameworks (MOFs) with polymer fibers. In contrast to commonly used powdered MOFs, polymer fibers can offer flexible support for MOFs, and some of the fibers can even work in concert with MOFs. The molecular transport channels are significantly enlarged when polymer fibers are employed as the base material for composites rather than conventional polymer films and mixed matrix films. This makes it simpler for the molecules to bind to the active site, speeding up the reaction. First, a brief analysis of the binding of MOFs to fibers is provided, followed by a systematic summary of the MOF forming process, including the synthesis and modification of MOFs, which lays the foundation for the subsequent summary of the synthesis methods of MOFs–fiber composites. In this article, three strategies are presented for attaching MOFs to polymer fibers: cospinning MOFs with fibers, depositing MOFs on fiber surfaces, and in situ growing MOFs on fiber surfaces. Different binding techniques make MOFs–fiber composites promising for many applications. Finally, the improvement of MOFs–fiber composites and their possible application scope are discussed.

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Hybrid adsorbent nonwoven structures: a review of current technologies

Cited by 27 publications

References 228 publications

Adsorption Performance of Activated-Carbon-Loaded Nonwoven Filters Used in Filtering Facepiece Respirators

Adsorption Performance of Activated-Carbon-Loaded Nonwoven Filters Used in Filtering Facepiece Respirators

Zeolite and short-cut fiber-based wet-laid filter media for particles and heavy metal ion removal of wastewater

Metal‐Organic Framework Based Polymer Fibers: Review on Synthesis and Applications

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