The Functionalization of Beta-Cyclodextrins on Multi Walled Carbon Nanotubes: Effects of the Dispersant and Non Aqueous Media

Ahmad, Abdul Latif; Jawad, Zeinab Abbas; Low, Siew Chun; Zein, Sharif Hussein Sharif

doi:10.2174/157341313805117839

Cited by 3 publications

(3 citation statements)

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“…The long term dope stability was affected due to the integration of MWCNTs-P into the polymer matrix, thus leading to unhomogenized dispersion of MWCNTs in the solution (Lee et al 2018;Latif Ahmad et al 2013). The particles settling rate and the compatibilities of MWCNTs with the remaining components of the dope were the highly dependent factors towards the homogenized dispersion of MWCNTs (Ismail et al 2011).…”

Section: Membrane Physical Morphologiesmentioning

confidence: 99%

“…In contrast, the N 2 permeance notably increased when 0.3 wt% MWCNTs-F are loaded into the CA polymer. This might be due to the excessive aggregation induced by the strong attractive forces between the MWCNTs which caused an increasein the overall N 2 permeance (Latif Ahmad et al 2013). Nevertheless, the relatively higher N 2 permeance was also due to the lower peak intensity towards polar functional groups resulting in lower repelling force towards the polar gases such as N 2 (Trotta et al 2011).…”

Section: Membrane Characterization (Atr-ftir)mentioning

confidence: 99%

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Blend Cellulose Acetate/Multi-Walled Carbon Nanotubes Mixed Matrix Membrane for CO2 /N2 Separation

China¹,

Jawada²,

China³

et al. 2020

JEES

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The carbon dioxide (CO 2 ) in the atmosphere has been increasing extensively over the past decades, which is a major contributor to the global warming phenomenon. Therefore, a highly performing and high cost efficiency membrane technology was proposed to selectively separate the hazardous CO 2 . Hence, a Mixed Matrix Membrane (MMM) was incorporated for CO 2 /N 2 separation with prospects to surpass the numerous shortcomings of conventional membranes. Thus, this study utilized cellulose acetate (CA) with acetyl content of 39 wt% and 56 wt% blended with multi-walled carbon nanotubes (MWCNTs) to fabricate the MMMs. The gas permeation results had showed that MMMs with functionalized MWCNTs (MWCNTs-F) had demonstrated enhanced separation properties of CO 2 /N 2 with a selectivity of 3.084 + 0.019 in comparison to pristine MWCNTs and blend CA-membrane. Hence, the loadings of MWCNTs-F towards the separation performances of the MMMs were then investigated. The CO 2 /N 2 selectivity from the gas permeation results showed an increased to 3.72 + 0.014 with optimal loadings of 0.20 wt% of MWCNTs-F within the polymer matrix. The superior performance of the MMM was attributed to the additional developments in the overall sufficient free volumes between the polymer chains. Eventually, the MMM showed insight towards the industrial applications in the gas separation field.

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Section: Membrane Physical Morphologiesmentioning

confidence: 99%

Section: Membrane Characterization (Atr-ftir)mentioning

confidence: 99%

Blend Cellulose Acetate/Multi-Walled Carbon Nanotubes Mixed Matrix Membrane for CO2 /N2 Separation

China¹,

Jawada²,

China³

et al. 2020

JEES

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show abstract

“…This is because Mn of polymeric membranes has a momentous influence on the rheology of the polymer solution which manipulates the structure and the performance of the final membranes [10]. Therefore, by synthesizing a membrane by blending three different molecular weights of CAB, the membrane surface hydrophilicity can be improved because of the presence of the extra hydroxyl (O−H) and carbonyl groups (C≡O) originating from the CAB of each Mn [11]. In addition, these highly polar functional groups, C ≡ O and O − H, can react with the non-polar CO2 gas [12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Solvent Evaporation Time and Casting Thickness on the Separation Performance of Cellulose Acetate Butyrate Blend Membrane

Manimaran

Jawad

Chew

2019

AMST

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Global warming and climate change due to greenhouse gases (GHGs) emission, mostly carbon dioxide (CO2), have induced global efforts to minimize the concentration of atmospheric CO2. To reduce the effects of this problem, membrane technology is selected for the separation of CO2 due to the energy efficiency and economic advantages exhibited. In this study, the chosen polymeric material, cellulose acetate butyrate (CAB) is optimized using a wet phase inversion method with various molecular weight and different casting conditions due to its outstanding film-forming specifications and capabilities of fabricating a defect-free layer of neat membrane. The membrane was synthesized by blending three different molecular weights (Mn) of 12,000, 30,000 and 70,000 at different casting thickness, 150 µm to 300 µm and solvent evaporation time of 3.5 to 5 min. The results of these predominant parameters were then utilized to determine a high performance CAB membrane suitable for an enhanced CO2/Nitrogen (N2) separation. Eventually, a high separation performance CAB membrane was successfully synthesized with a CO2/N2 selectivity of 1.5819 ± 0.0775 when the solvent evaporation time and casting thickness was optimized at 4.5 min and 300 µm, respectively. Through this study, an improved understanding between membrane casting conditions and membrane performance has been achieved, for future development and progress.

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Binding Stability of β-CD on MWCNTS: Role of Washing Cycle on the β-CD Coating

Jawad¹,

Ahmad²,

Low³

et al. 2017

JPS

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The Functionalization of Beta-Cyclodextrins on Multi Walled Carbon Nanotubes: Effects of the Dispersant and Non Aqueous Media

Cited by 3 publications

References 0 publications

Blend Cellulose Acetate/Multi-Walled Carbon Nanotubes Mixed Matrix Membrane for CO2 /N2 Separation

Blend Cellulose Acetate/Multi-Walled Carbon Nanotubes Mixed Matrix Membrane for CO2 /N2 Separation

Effect of Solvent Evaporation Time and Casting Thickness on the Separation Performance of Cellulose Acetate Butyrate Blend Membrane

Binding Stability of β-CD on MWCNTS: Role of Washing Cycle on the β-CD Coating

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