Structural, Optical, Morphological and Mechanical Studies of Polyethylene Oxide/Sodium Alginate Blend Containing Multi-Walled Carbon Nanotubes

Polymer composites are favorite materials for sensing applications due to their low cost and easy fabrication. In the current study, composite nanofibers consisting of polyethylene oxide (PEO), oxidized multi-walled carbon nanotubes (MWCNT) and copper oxide (CuO) nanoparticles with 1% and 3% of fillers (i.e., PEO–CuO–MWCNT: 1%, and PEO–CuO–MWCNT: 3%) were successfully developed through electrospinning for humidity sensing applications. The composite nanofibers were characterized by FTIR, XRD, SEM and EDX analysis. Firstly, they were loaded on an interdigitated electrode (IDE), and then the humidity sensing efficiency was investigated through a digital LCR meter (E4980) at different frequencies (100 Hz–1 MHz), as well as the percentage of relative humidity (RH). The results indicated that the composite nanofibers containing 1% and 3% MWCNT, combined with CuO in PEO polymer matrix, showed potent resistive and capacitive response along with high sensitivity to humidity at room temperature in an RH range of 30–90%. More specifically, the PEO–CuO–MWCNT: 1% nanocomposite displayed a resistive rapid response time within 3 s and a long recovery time of 22 s, while the PEO–CuO–MWCNT: 3% one exhibited 20 s and 11 s between the same RH range, respectively.

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Thermokinetics simulation for multi-walled carbon nanotubes with sodium alginate by advanced kinetics and technology solutions

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-013-3092-5 ◽

2013 ◽

Vol 113 (3) ◽

pp. 1603-1610 ◽

Cited By ~ 12

Author(s):

Sheng-Yi Weng ◽

Shang-Hao Liu ◽

Lung-Chang Tsai ◽

Tung-Feng Hsieh ◽

Chih-Ming Ma ◽

...

Keyword(s):

Carbon Nanotubes ◽

Sodium Alginate ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

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Preparation and Characterization of Sodium Alginate-Based Oxidized Multi-Walled Carbon Nanotubes Hydrogel Nanocomposite and its Adsorption Behaviour for Methylene Blue Dye

Frontiers in Chemistry ◽

10.3389/fchem.2021.576913 ◽

2021 ◽

Vol 9 ◽

Author(s):

Edwin Makhado ◽

Mpitloane Joseph Hato

Keyword(s):

Carbon Nanotubes ◽

Methylene Blue ◽

Sodium Alginate ◽

Adsorption Kinetics ◽

Isotherm Models ◽

Regeneration Ability ◽

Maximum Adsorption Capacity ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes ◽

Hydrogel Nanocomposite

Herein, a sodium alginate/poly (acrylic acid)/oxidized-multi-walled carbon nanotubes hydrogel nanocomposite (SA/p(AAc)/o-MWCNTs HNC) was synthesized by in situ free-radical polymerization method. The synthesized SA/p(AAc)/o-MWCNTs HNC was used to remove methylene blue (MB) from aqueous solution. The synthesized HNC was confirmed by employing various characterization techniques. The SA/p(AAc)/o-MWCNTs HNC exhibited a maximum swelling capacity of 2265.4% at pH 8.0. The influence of vital parameters in the sorption process including the initial pH, adsorption dose, contact time and concentration were systematically examined on a batch mode. Subsequently, adsorption kinetics as well as isotherm models were applied to assess the nature and mechanism of the adsorption process. Adsorption kinetics were best described by pseudo-second-order model, while the Langmuir isotherm model governed the adsorption isotherm. The SA/p(AAc)/o-MWCNTs HNC exhibited a maximum adsorption capacity of 1596.0 mg/g at 25°C. This adsorbent showed excellent MB uptake and good regeneration ability.

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INFLUENCE OF DEAGGLOMERATION STATES OF CARBON NANOTUBES ON THE THERMAL AND MECHANICAL PROPERTIES OF CARBON NANOTUBE-REINFORCED POLYETHYLENE OXIDE

International Journal of Nanoscience ◽

10.1142/s0219581x09005578 ◽

2009 ◽

Vol 08 (01n02) ◽

pp. 23-27 ◽

Cited By ~ 1

Author(s):

KWABENA A. NARH ◽

AHMED-TIJANI AGWEDICHAM ◽

LAILA J. JALLO ◽

KYONG Y. RHEE ◽

JI H. LEE

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Polyethylene Oxide ◽

High Speed ◽

Test Results ◽

Scanning Calorimetry ◽

Sem Images ◽

Ultrasonic Probe ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

Composites of polyethylene oxide and carbon nanotubes were produced by first deagglomerating highly agglomerated multi-walled carbon nanotubes in water, using a high-intensity ultrasonic probe, and then mixing with a solution of the polymer using a high-speed mixer. The deagglomeration of the nanotubes was carried out at different amplitudes of the vibrating ultrasonic probe. Differential scanning calorimetry results show an increase in melting temperature with increase in amplitude of sonication. Also, tensile test results show improved mechanical properties, with increased degree of deagglomeration of the nanotubes. SEM images show that the extent of nanotubes dispersion in the polymer matrix correlates with the extent of deagglomeration.

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