Polymer/layered silicate nanocomposites: a review from preparation to processing

Department of Materials Science, University of Patras, 26504 Rio Patras, Greece, Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vass. Constantinou Avenue, 116 35 Athens, Greece, Institut de Biologie Moleculaire et Cellulaire, UPR9021 CNRS, Immunologie et Chimie Therapeutiques, 67084 Strasbourg, France, and Dipartimento di Scienze Farmaceutiche, Universita di Trieste, Piazzale Europa 1, 34127 Trieste, Italy

Chemistry of Carbon Nanotubes

Small but strong: A review of the mechanical properties of carbon nanotube–polymer composites

https://cyberleninka.org/article/n/933162.pdf

Hydrogels in drug delivery: progress and challenges

Carbon nanotubes (CNTs) hold the promise of delivering exceptional mechanical properties and multi-functional characteristics. Ever-increasing interest in applying CNTs in many different fields has led to continued efforts to develop dispersion and functionalization techniques. To employ CNTs as effective reinforcement in polymer nanocomposites, proper dispersion and appropriate interfacial adhesion between the CNTs and polymer matrix have to be guaranteed. This paper reviews the current understanding of CNTs and CNT/polymer nanocomposites with two particular topics: (i) the principles and techniques for CNT dispersion and functionalization and (ii) the effects of CNT dispersion and functionalization on the properties of CNT/polymer nanocomposites. The fabrication techniques and potential applications of CNT/polymer nanocomposites are also highlighted.

Dispersion and functionalization of carbon nanotubes for polymer-based nanocomposites: a review

Phenoxy (poly(hydroxyether of bisphenol-A), also known as poly(bisphenol-A-co-epichlorohydrin)) was grafted onto multiwalled carbon nanotubes (MWNTs) by a reactive blending process. Reactions between terminal glycidyl groups of phenoxy and carboxylic acid groups of acidified MWNTs resulted in the grafting of phenoxy chains onto MWNTs. The mechanical properties of composites of poly(ethylene oxide) (PEO) and phenoxy-grafted MWNTs were studied. The miscibility between PEO and phenoxy enabled the good dispersion of nanotubes in the PEO matrix as evidenced by polarized optical microscopy and transmission electron microscopy. The spherulite size of PEO progressively decreased with increasing amount of phenoxy-grafted MWNTs added. At an optimal MWNT content of 1.5 wt%, the addition of phenoxy-grafted MWNTs led to increases of storage modulus, Young's modulus, yield stress, tensile strength, ultimate strain, and toughness of PEO by 113, 228, 166, 442, 1240, and 4080%, respectively. Such simultaneous increases in stiffness, strength, ductility and toughness of a polymer by an additive are rather uncommon.

https://iopscience.iop.org/article/10.1088/0957-4484/18/12/125606/pdf

Enhancement of stiffness, strength, ductility and toughness of poly(ethylene oxide) using phenoxy-grafted multiwalled carbon nanotubes

Composites of poly(vinylidene fluoride) (PVDF) and poly(methyl methacrylate) (PMMA)-grafted MWNTs were prepared by melt mixing. The miscibility between PVDF and PMMA helps improve the dispersion of PMMA-grafted MWNTs in the PVDF matrix and also the load transfer from the PVDF matrix to the nanotubes. MWNTs act as nucleation agents to increase the crystallization and melting temperatures of PVDF, but the nucleation effect is suppressed when PMMA is grafted onto the nanotubes. X-ray diffraction and infrared spectroscopic studies showed that MWNTs induce the formation of β-form PVDF crystallites. The storage modulus of PVDF is increased by nearly 150% at 20 °C upon the incorporation of PMMA-grafted MWNTs with MWNT content of 1.93 wt%. PMMA-grafted MWNTs are more effective than organoclay in increasing the storage modulus of PVDF.

https://iopscience.iop.org/article/10.1088/0957-4484/18/23/235701/pdf

Microstructure, crystallization and dynamic mechanical behaviour of poly(vinylidene fluoride) composites containing poly(methyl methacrylate)- grafted multiwalled carbon nanotubes

Enhancement of interfacial adhesion and dynamic mechanical properties of poly(methyl methacrylate)/multiwalled carbon nanotube composites with amine-terminated poly(ethylene oxide)

Suat Hong Goh

Papers

Enhancement of stiffness, strength, ductility and toughness of poly(ethylene oxide) using phenoxy-grafted multiwalled carbon nanotubes

Microstructure, crystallization and dynamic mechanical behaviour of poly(vinylidene fluoride) composites containing poly(methyl methacrylate)- grafted multiwalled carbon nanotubes

Enhancement of interfacial adhesion and dynamic mechanical properties of poly(methyl methacrylate)/multiwalled carbon nanotube composites with amine-terminated poly(ethylene oxide)

Miscibility study of Torlon® polyamide-imide with Matrimid® 5218 polyimide and polybenzimidazole

Hyperbranched Poly(amino ester)s with Different Terminal Amine Groups for DNA Delivery