Functionalized multiwalled carbon nanotubes as reinforcing agents for poly(vinyl alcohol) and poly(vinyl alcohol)/starch nanocomposites: synthesis, characterization and properties

Massoumi, Bakhshali; Jafarpour, Parivash; Jaymand, Mehdi; Entezami, Ali Akbar

doi:10.1002/pi.4867

Cited by 28 publications

(20 citation statements)

References 36 publications

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“…The most common procedure used for covalent attachment of oxygen containing reactive groups to CNTs is the treatment with inorganic acids. Usually, the nanotubes are treated through being refluxed with a mixture of concentrated nitric and sulfuric acid with the ratio of volume 1 to 3 although their concentrations may be slightly different [20][21][22][23]. However, accidently, the ratio of the acids changes, for example, CNTs were oxidized with the mixture of 83 mL of sulfuric acid and 133 mL of nitric acid (65%) [24].…”

Section: Acid Treatmentmentioning

confidence: 99%

“…Polymer-functionalized CNTs, compared to the unmodified ones, usually show relatively good dispersibility in organic solvents and high compatibility with polymer matrix in CNTs/ polymer composites. The functionalized CNTs containing active groups (predominantly carboxyl) can further corporate with polymers through esterification or amidation reactions between the groups on the CNTs and those on the polymer chains, [21,33,34] and conversely, treated or functionalized macromolecular chains can also directly attach on pristine CNTs [29,35,36].…”

Section: Grafting Macromolecular Chainsmentioning

confidence: 99%

“…Grafting different kind of polymer onto CNTs from the matrix polymer which is however compatible with the former polymer is another example. Massoumi et al first prepared carboxylated MWCNTs by acid treatment, then poly(ethylene glycol)-grafted MWCNTs (PEG-MWCNTs), whereas finally obtained PVA/MWCNTs-PEG nanocomposite and PVA/starch/MWCNTs-PEG nanocomposite [21].…”

Section: Grafting Macromolecular Chainsmentioning

confidence: 99%

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Mechanical Properties of Carbon Nanotubes-Polymer Composites

Dai¹,

Sun²

2016

Carbon Nanotubes - Current Progress of Their Polymer Composites

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Carbon nanotubes CNTs , as a one-dimensional material, have outstanding mechanical properties such as extreme tensile strength and Young s modulus. At present, to prepare pure CNTs materials is quite difficult and the mechanical properties of the materials are limited in a low level. Because of their extraordinary mechanical properties and high aspect ratio, CNTs are considered to be ideal candidates for polymer reinforcement. In addition, CNTs/polymer composite materials are much easier to prepare than pure CNTs materials, so they have been paid much attention by researchers recently. However, challenges must be faced to prepare the CNTs/polymer composite with ultimate mechanical properties. So in this chapter, the main concerns are how to disperse CNTs in polymer matrix to prepare homogenous composite dispersions, how to prepare homogenous CNTs/polymer composite using possible fabricating processes based on the homogenous dispersions, how to increase the fiber mechanical properties especially through the enhancing interaction between polymer and CNTs, controlling the amount of CNTs and enhancing their orientation in the matrix.

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Section: Acid Treatmentmentioning

confidence: 99%

Section: Grafting Macromolecular Chainsmentioning

confidence: 99%

Section: Grafting Macromolecular Chainsmentioning

confidence: 99%

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Mechanical Properties of Carbon Nanotubes-Polymer Composites

Dai¹,

Sun²

2016

Carbon Nanotubes - Current Progress of Their Polymer Composites

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“…In addition, precipitation of plasticizers may also occur, leading to the decreased transparency and varying mechanical properties . Introduction of nanofillers to prepare PVA nanocomposite is an effective approach to compensate mechanical properties, such as cellulose nanocrystals , SiO 2 , carbon nanotubes , graphene oxide , etc.…”

Section: Introductionmentioning

confidence: 99%

PVA grafted POSS hybrid for high performance polyvinyl alcohol films with enhanced thermal, hydrophobic and mechanical properties

Liu

Xu³

et al. 2018

Polymer Composites

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As one kind of novel nanomaterial, polyhedral oligomeric silsesquioxane (POSS) can improve the thermal stability, water resistance, and mechanical properties of the composites when introduced into a polymer matrix. In this work, we carried a novel method to fabricate polymeric nanocomposite films from poly(vinyl alcohol) (PVA) by grafting octa(−chloropropyl) POSS using sodium hydroxide (NaOH) as a catalyst. Fourier transform infrared (FTIR) and 1H nuclear magnetic resonance (1H NMR) spectral analysis confirmed the structure of POSS‐graft‐PVA (POSS‐g‐PVA) nanoparticles. For the cast nanocomposite films, transmission electron microscopy (TEM) micrographs revealed that good POSS dispersion/distribution into PVA matrix was achieved, leading to substantial improvement of mechanical properties, reduced water absorption, and enhanced thermal stability. The chemical grafting of PVA on the nanoparticles plays an important role in improving these properties compared with conventional filled composites. POLYM. COMPOS., 40:2768–2776, 2019. © 2018 Society of Plastics Engineers

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“…I hope this Special Issue of Polymer International with contributions from editors, former colleagues, collaborators, and students, who feel honored to be able to contribute to his memory, will give some flavor about his scientific activities in macromolecular science.…”

mentioning

confidence: 99%