Microwave and ultrasound-assisted synthesis of poly(vinyl chloride)/riboflavin modified MWCNTs: Examination of thermal, mechanical and morphology properties

Abdolmaleki, Amir; Mallakpour, Shadpour; Azimi, Faezeh

doi:10.1016/j.ultsonch.2017.09.018

Cited by 26 publications

(11 citation statements)

References 48 publications

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“…In this work, due to the existence of AS moiety in the polymer structure, the MWCNTs were functionalized with aspartic acid (AS) as a bio-based molecule to improve interfacial interactions between the latter and former. Functionalization was done under microwave heating using a simple and low-cost method via formation of amide linkages between COOHs of MWCNTs and NH 2 of AS (Scheme S5) [38,39,59].…”

Section: Functionalization Of Mwcntsmentioning

confidence: 99%

Synthesis and characterization of novel biodegradable water dispersed poly(ether-urethane)s and their MWCNT-AS nanocomposites functionalized with aspartic acid as dispersing agent

et al. 2018

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New biodegradable poly(ether-urethane)s (PEU)s were synthesized via the reaction of L-leucine anhydride cyclo-peptide, polyethylene glycol-1000 and hexamethylene diisocyanate. Then, they were end-functionalized with aspartic acid (AS) as a dispersing agent and were dispersed in water. MWCNTs were also functionalized by AS under microwave irradiation. Polymer/MWCNT-AS composites and polymer/MWCNT-AS water dispersed composites were prepared through an ultrasoundassisted method. We have designed these PEUs with two different structural architectures (PA1and PA2) which can be readily dispersed in water (PA1-D and PA2-D). The structure and properties of the polymers, MWCNTs-AS and PEUs/MWCNTs-AS composites were investigated by FTIR and NMR spectroscopy methods and FE-SEM, TEM and TGA techniques. The particle sizes of the resulting PA1-D and PA2-D dispersions were in the range of 200-300 nm. The results showed that by increasing MWCNT-AS loading, the degradation rate and particle sizes of the dispersed composites decreased, while thermal stability and dispersion stability of the composite systems increased. The degradation tests of polymers and their composites in PBS at 37 °C after 10 days showed weight losses ranging from 23 to 44 and 17-37%, respectively. The cytotoxicity study of polymers using the direct-contact test on L929 mouse fibroblast cell line showed no toxicity. Other properties such as thermal stability, dispersion's particle size, degradation rate and morphology of the composites were studied, and the effect of simultaneous dispersion of MWCNTs-AS and PEUs in water on the properties of the resulting mixtures was studied. We suggest that these polymers have tunable properties which may potentially be considered for drug carriers' studies.

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Section: Functionalization Of Mwcntsmentioning

confidence: 99%

Synthesis and characterization of novel biodegradable water dispersed poly(ether-urethane)s and their MWCNT-AS nanocomposites functionalized with aspartic acid as dispersing agent

et al. 2018

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“…In the literature, a favorably combined effect of microwave and ultrasound treatments on nanoparticle formation has been recently discussed and reported. [ 40–49 ] However, experimental studies and comparative analyses on whether hybrid microwave and ultrasound should be sequentially or simultaneously performed are very scarce. This work, therefore, aims to investigate the effect of ultrasound treatment in both consecutive and concurrent models on the bubble and particle sizes during and after the microwave irradiation.…”

Section: Introductionmentioning

confidence: 99%

Intensified Nanoparticle Synthesis Using Hybrid Microwave and Ultrasound Treatments: Consecutive and Concurrent Modes

Shibatani

Kan

Asakuma

et al. 2020

Crystal Research and Technology

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Bubble formation around nucleated particle is inevitable when quick heating of microwave is employed in nanoparticle synthesis. Since these bubbles may cause bumping behavior, the bubble growth must be possibly suppressed to ensure stable microwave‐assisted operation. In this study, sequential and simultaneous ultrasound treatment and microwave irradiations on nanoparticle synthesis are proposed and investigated to assess the benefit of ultrasound in preventing superheating behavior and producing finer particles. Experimental results indicate that the inclusions of ultrasound treatment result in finer particle sizes and suppression of bumping behavior. Particularly, consecutive ultrasound treatment and microwave irradiation are recommendable due to its practicality and generating smallest bubbles and final particle sizes. This technique can therefore be expected as an innovative way to enhance industrial applications of quick thermal response induced by microwave.

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“…They found that, for PPTA-ECH-MWNTs-NH2-x/PVC, mechanical properties were highly modified in comparison to pure PVC. Amir Abdolmaleki et al [30] have investigated the physicochemical features of PVC/MWCNTs functionalized with riboflavin (RIB). Their results conclude that there is a higher mechanical and thermal behavior for 12wt% PVC/(RIB) MWCNTs compared to other concentrations of MWCNTs.…”

Section: Introductionmentioning

confidence: 99%

Characterization of PVC/MWCNTs Nanocomposite: Solvent Blend

Naim

Alfannakh

Arafat

et al. 2019

Science and Engineering of Composite Materials

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Polyvinyl Vinyl Chloride (PVC) multiwall carbon nanotubes (MWCNTs) nanocomposite flexible films were prepared using the solvent blend technique. Chloroform (CHCl3) and tetrahydrofuran ((CH2)4O) were used as solvents for MWCNTs and PVC, respectively. The effect of the solvents’ blend on electrical, optical and thermal properties of PVC/MWCNTs were investigated. The results of the Raman spectrum showed that all the characteristic bands of PVC polymer have a slight shift due to addition of MWCNTs. Electrical results showed that the nanocomposite samples with chloroform volume ratios of 10% and 25% had nearly the same conductivity. This is attributed to the formation of the MWCNTs network, which assisted in electrical conductivity. The I-V hysteresis curve decreases as the temperature increases and as it approaches the glass transition temperature. The non-isothermal kinetics analysis for PVC and PVC/MWCNTs were investigated by Thermogravimetry Analysis (TGA) using the model-free kinetic method. The non-isothermal measurements were carried out at five heating rates of 5 to 40∘C/min. The results show that the main decomposition process has constant apparent activation energies for all samples. The use of the bi-solvent method has improved the dispersion of untreated MWCNTs, and this has been reflected on the stability of both electrical and thermal properties.

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Microwave and ultrasound-assisted synthesis of poly(vinyl chloride)/riboflavin modified MWCNTs: Examination of thermal, mechanical and morphology properties

Cited by 26 publications

References 48 publications

Synthesis and characterization of novel biodegradable water dispersed poly(ether-urethane)s and their MWCNT-AS nanocomposites functionalized with aspartic acid as dispersing agent

Synthesis and characterization of novel biodegradable water dispersed poly(ether-urethane)s and their MWCNT-AS nanocomposites functionalized with aspartic acid as dispersing agent

Intensified Nanoparticle Synthesis Using Hybrid Microwave and Ultrasound Treatments: Consecutive and Concurrent Modes

Characterization of PVC/MWCNTs Nanocomposite: Solvent Blend

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