Fabrication and dialysis performance of functionalized multiwall carbon nanotubes integrated cellulose acetate/poly(vinylpyrrolidone) membranes

Ashraf, Muhammad Adnan; Islam, Atif; Butt, Muhammad Arif; Hussain, Tajamal; Khan, Rafi Ullah; Bashir, Shahid; Iqbal, Javed

doi:10.1016/j.ijbiomac.2021.09.131

Cited by 9 publications

(5 citation statements)

References 66 publications

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“…The FTIR spectra of PAN/Fe 3 O 4 , PAN/Fe 3 O 4 /PANI, and [PAN/Fe 3 O 4 /PANI]//[MWCNT/PVP] are depicted in Figure 1g. The peak at 1290 cm −1 exhibits the stretching vibration of CN groups 44 . The peaks at 1732 and 3201 cm −1 are associated with the CO stretching and the NH stretching vibration, respectively.…”

Section: Resultsmentioning

confidence: 98%

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Electromagnetic shielding Janus membrane for direct current‐type pressure and sliding sensing

Feng,

Lv,

Liu

et al. 2024

J of Applied Polymer Sci

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Facing increasing electromagnetic radiation pollution, soft sensors with electromagnetic interference (EMI) shielding is highly desirable. Here, flexible electromagnetic shielding [polyacrylonitrile/Fe3O4/polyaniline]//[multiwalled carbon nanotube/polyvinyl pyrrolidone] (denoted [PAN/Fe3O4/PANI]//[MWCNT/PVP]) Janus membrane is reported for pressure and sliding sensing. The [PAN/Fe3O4/PANI] layer of Janus membrane as the force and sliding sensing unit can generate direct current‐type (DC‐type) voltage signals by conducting polymer/metal Schottky junction, whereas [MWCNT/PVP] layer serves as main electromagnetic shielding unit. Under the vertical force and horizontal sliding of aluminum (Al) foil, it can output DC‐type voltage signals based on the Schottky contact. The performance of [PAN/Fe3O4/PANI]//[MWCNT/PVP] Janus membrane for pressure and sliding sensing is appropriately explored and assessed. Moreover, the Janus membrane exhibits excellent shielding effects with average EMI shielding effectiveness (SE) of 37.54 dB in 8.2–12.4 GHz (X‐Band) frequency ranges. Thus, based on the asymmetrical double‐layer structure, soft DC‐type sensor with EMI shielding is achieved, showing utilization potential in wearable electronics and intelligent robots.

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Section: Resultsmentioning

confidence: 98%

“…The peak at 1290 cm À1 exhibits the stretching vibration of C N groups. 44 The peaks at 1732 and 3201 cm À1 are associated with the C O stretching and the N H stretching vibration, respectively. The peaks at 813 and 1157 cm À1 correspond to the bending vibration inside and outside the C H plane at the aromatic ring of PANI.…”

Section: Characterizationmentioning

confidence: 99%

Electromagnetic shielding Janus membrane for direct current‐type pressure and sliding sensing

Feng,

Lv,

Liu

et al. 2024

J of Applied Polymer Sci

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“…In 2021, Butt et al 35 prepared mixed matrix membranes (MMM) by doping acid functionalized multiwall carbon nanotubes (f-MWCNTs) as nanofillers into CA/PVP co-blended matrix using the immersion phase separation technique (Fig. 6).…”

Section: Materials Compositions Of Dialysis Membranesmentioning

confidence: 99%

The separation membranes in artificial organs

Sheng

Sun

et al. 2023

Mater. Chem. Front.

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“…Indeed, CNT membranes comprising highly ordered, vertically aligned arrays of individual CNT capillaries/channels with narrow pore size distributions have been shown to outperform conventional polymeric membranes with polydisperse tortuous pores in gas/liquid transport, [28,29] nanofiltration, [29][30][31][32][33] ionic/molecular exclusion [30][31][32][33] for a range of applications including chemical warfare protection, [31] breathable and protective garments, [29] bacterial resistance, [34] among others. CNT have also been used as additives/fillers in polymeric dialysis membranes (see Table S2, Supporting Information) to enhance the mechanical strength, improve the antifouling property, modify blood compatibility, and tune membrane performance, [35][36][37][38][39][40][41][42][43][44] but to the best of our knowledge, the use of CNT channels/capillaries for size-selective mass transport in hemofiltration applications has not been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Hemofiltration via Molecular Sieving and Ultra‐Low Friction in Carbon Nanotube Capillary Membranes

Cheng,

Ferrell,

Öberg

et al. 2023

Adv Funct Materials

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Conventional dialyzer membranes typically comprise of unevenly distributed polydisperse, tortuous, rough pores, embedded in relatively thick ≈20–50 µm polymer layers wherein separation occurs via size exclusion as well as differences in diffusivity of the permeating species. However, transport in such polymeric pores is increasingly hindered as the molecule size approaches the pore dimension, resulting in significant retention of undesirable middle molecules (≥15–60 kDa) and uremic toxins. Enhanced removal of middle molecules is usually accompanied by high albumin loss (≈66 kDa) causing hypoalbuminemia. Here, the scalable bottom‐up fabrication of wafer‐scale carbon nanotube (CNT) membranes with highly aligned, low‐friction, straight‐channels/capillaries and narrow pore‐diameter distributions (≈0.5–4.5 nm) is demonstrated, to overcome persistent challenges in hemofiltration/hemodialysis. Using fluorescein isothiocyanate (FITC)‐Ficoll 70 and albumin in phosphate buffered saline (PBS) as well as in bovine blood plasma, it is shown that CNT membranes can allow for significantly higher hydraulic permeability (more than an order of magnitude when normalized to pore area) than commercial high‐flux hemofiltration/hemodialysis membranes (HF 400), as well as greatly enhance removal of middle molecules while maintaining comparable albumin retention. These findings are rationalized via an N‐pore transport model that highlights the critical role of molecular flexing and deformation during size‐selective transport within nanoscale confinements of the CNTs. The unique transport characteristics of CNTs coupled with size‐exclusion and wafer‐scale fabrication offer transformative advances for hemofiltration, and the obtained insight into molecular transport can aid advancements in several other bio‐systems/applications beyond hemofiltration/hemodialysis.

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Fabrication and dialysis performance of functionalized multiwall carbon nanotubes integrated cellulose acetate/poly(vinylpyrrolidone) membranes

Cited by 9 publications

References 66 publications

Electromagnetic shielding Janus membrane for direct current‐type pressure and sliding sensing

Electromagnetic shielding Janus membrane for direct current‐type pressure and sliding sensing

The separation membranes in artificial organs

High‐Performance Hemofiltration via Molecular Sieving and Ultra‐Low Friction in Carbon Nanotube Capillary Membranes

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