Cellulose acetate/sodium-activated natural bentonite clay nanofibres produced by free surface electrospinning

Bazbouz, Mohamed Basel; Russell, Stephen J.

doi:10.1007/s10853-018-2354-9

Cited by 13 publications

(5 citation statements)

References 85 publications

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“…Initial mass weight loss for Na‐CMC polymer and MWCNTs filaments (about 7.1%) is considered due to the evaporation of the absorbed moisture trapped in the sample structure. [ 116 ] The mass weight loss due to thermal degradation of MWCNTs filament compounds was 25.92% at 300 °C based on the filament weight after subtracting the mass of evaporated water. However, this weight loss was high due to the 4.6 mass ratio of Na‐CMC in the total mass of MWCNTs filaments.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of High Specific Electrical Conductivity and High Ampacity Carbon Nanotube/Copper Composite Wires

Bazbouz

Aziz

Copic

et al. 2021

Adv Elect Materials

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A challenge is to integrate Cu with carbon nanotubes (CNTs) and form a free‐standing composite wire. This is achieved by first making a CNT filament using high concentration (20 g L−1 ) CNT dispersion, an acid‐free wet spinning process and then by replacing the polymer with copper using heat based polymer decomposition and periodic pulse reverse electroplating. It is demonstrated that indeed the specific conductivity and the current‐carrying capability (or ampacity) are increased manifold. The multiwalled CNT (MWCNT)/Cu composite wires developed in this paper have electrical conductivity σ ≈ 5.5 × 10 5 S cm−1. These MWCNT/Cu wires are 2/3rd the weight of bulk Cu wires. Their specific electrical conductivity is σρ ≈ 9.38 ×10 4 S cm2 g−1 which is 45% higher than International Annealed Copper Standard Cu. These composite wires have an ampacity of A ≈ 20 × 105 and 4 × 105 A cm−2 for 1.5 and 17 mm gauge length wires, respectively, which is four to six times higher than pure Cu depending on the wire lengths. MWCNTs volume percentage in the MWCNT/Cu wire is about 40%.

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Section: Resultsmentioning

confidence: 99%

Fabrication of High Specific Electrical Conductivity and High Ampacity Carbon Nanotube/Copper Composite Wires

Bazbouz

Aziz

Copic

et al. 2021

Adv Elect Materials

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“…Noticeably, polymer/clay composites are mouldable solid materials that are characterized by their excellent adsorption capacity, propitious thermal stability. In this context, many studies have recommended the incorporation of graphene oxide, clays such as hydroxyapatite, bentonite, zeolite and montmorillonite into CA as an auspicious solution to boost its properties and mainly the adsorption property 14 – 18 . However, there are a plethora of efficient clays that are not exploited to ameliorate the CA properties.…”

Section: Introductionmentioning

confidence: 99%

Construction of attapulgite decorated cetylpyridinium bromide/cellulose acetate composite beads for removal of Cr (VI) ions with emphasis on mechanistic insights

Abd El-Monaem,

Omer,

Hamad

et al. 2024

Sci Rep

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Eco-friendly and renewable composite beads were constructed for efficient adsorptive removal of Cr (VI) ions. Attapulgite (ATP) clay decorated with cetylpyridinium bromide (CPBr) was impregnated into cellulose acetate (CA) beads, which were formulated through a simple and cost-effective solvent-exchange approach. FTIR, XRD, SEM, Zeta potential, and XPS characterization tools verified the successful formation of ATP–CPBr@CA beads. The composite beads displayed a spherical and porous shape with a positively charged surface (26.6 mV) at pH 2. In addition, higher adsorption performance was accomplished by ATP–CPBr@CA composite beads with ease of separation compared to their components. Meanwhile, equilibrium isotherms pointed out that the Langmuir model was optimal for describing the adsorption process of Cr (VI) with a maximal adsorption capacity of 302 mg/g. Moreover, the D–R isotherm model verified the physical adsorption process, while adsorption data obeyed the pseudo-second-order kinetic model. Further, XPS results hypothesized that the removal mechanism involves adsorption via electrostatic interactions, redox reaction, and co-precipitation. Interestingly, the ATP–CPBr@CA composite beads reserved tolerable adsorption characteristics with a maximum removal present exceeding 70% after reuse for seven successive cycles, proposing its feasible applicability as a reusable and easy-separable candidate for removing heavy metals from aquatic bodies.

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“…Currently, CA is one of the most commonly used polymers in the preparation of electrospun membranes with a good prospect of application in filtration, separation, and water treatment [ 41 , 42 , 43 , 44 ]. However, the studies on obtaining cellulose acetate/clay-based composites by electrospinning for pollutant removal are still scarce [ 45 , 46 ]. In this regard, in the present study a one-step preparation of CA fibers filled with nanoclays was described.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Electrospun Cellulose Acetate/Nanoclay Composites for Pollutant Removal

Tsekova

Stoilova

2022

Polymers

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The creation of eco-friendly clay-based composites for pollutant removal by adsorption still remains a challenge. This problem might be successfully solved by the development of electrospun polymer–clay composites. For the first time in this study, a one-step fabrication of cellulose acetate (CA) fibers filled with commercially available nanoclays (NCs) was described. The optimal ratio at which CA/NCs dispersions remained stable was accomplished by varying the nanoclay concentration with respect to CA. Furthermore, the selected solvent system and the electrospinning conditions allowed for the successful fabrication of electrospun CA/NC composites. It was found that the composites’ surface morphology was not affected by the incorporated nanoclays and was the same as that of the electrospun CA fibers. The performed analyses clearly showed that CA and nanoclays did not react during the electrospinning process. It was found that the distribution of nanoclay layers probably was a mixture of intercalated and exfoliated structures. Notably, the type of the nanoclay strongly influenced the adsorption ability of CA/NC composites toward Cr(VI) ions and MB dye. These results suggested that the fabricated CA/NC composites are suitable for pollutant removal due to their specific structure.

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Cellulose acetate/sodium-activated natural bentonite clay nanofibres produced by free surface electrospinning

Cited by 13 publications

References 85 publications

Fabrication of High Specific Electrical Conductivity and High Ampacity Carbon Nanotube/Copper Composite Wires

Fabrication of High Specific Electrical Conductivity and High Ampacity Carbon Nanotube/Copper Composite Wires

Construction of attapulgite decorated cetylpyridinium bromide/cellulose acetate composite beads for removal of Cr (VI) ions with emphasis on mechanistic insights

Fabrication of Electrospun Cellulose Acetate/Nanoclay Composites for Pollutant Removal

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