Non-covalently functionalized multiwalled carbon nanotubes by chitosan and their synergistic reinforcing effects in PVA films

Abstract

Multiwalled carbon nanotubes (MWCNTs) were regarded as ideal candidates for fillers in a polymer matrix due to their outstanding mechanical, electrical and thermal properties. A series of nanocomposite films were prepared by a solution casting method introducing chitosan (CS) treated MWCNTs into a poly (vinyl alcohol) (PVA) matrix. The nanocomposites were characterized by field emission scanning electron microscopy and Fourier Transform Infrared Spectroscopy. The results indicated that MWCNTs treated by chitosan dispersed well in the PVA matrix, and the tensile properties and water resistance of nanocomposites were improved greatly compared with neat PVA.

Nanoindentation and thermal study of polyvinylalcohol/graphene oxide nanocomposite film through organic/inorganic assembly

“…These results confirms the existence of hydrogen bonding exists between PVA and GO sheets [4,17,23]. The characteristics of analogous layered-structures with uniformly dispersed GO in PVA matrix are illustrated in Scheme 1, which is different from those of pristine PVA film and polymer/carbon nanotubes composite films [2,9,12]. …”

“…Due to its favorable mechanical, thermal resistance (melting point > 200 • C), biodegradable properties and flexibility, PVA has been widely applied in manufacturing fibers, coatings, food packages and medical devices [1][2][3]. Besides, its nontoxic, odorless and biocompatible features make PVA films promising candidates in biotechnological applications, such as tissue engineering, drug delivery, articular cartilage, and biosensors [2,4].…”

“…However, pure PVA shows some drawbacks, such as low elastic modulus, poor abrasion resistance and severe creep problem, which lead to early failure of pure PVA and restrict its use in industry [2,[8][9][10]. In order to overcome the aforementioned drawbacks, researchers have developed PVA nanocomposites with improved properties by using various inorganic nanofillers, such as clay [11], carbon nanotube [12], graphene [13,14], nano-TiO 2 [15].…”

Adsorption behaviors for oleuropein from olive leaves extracts by porous materials with carbon nanotubes

“…The techniques concerning covalent and noncovalent functionalization have been used for isolating individual nanotubes [14,15]. It has been reported that multi-walled CNT can be used as outstanding fillers in the polymer matrix and it dispersed well in polyvinyl alcohol (PVA) matrix after being treated by chitosan, and then tensile properties and water resistance of nanocomposites were greatly enhanced compared with PVA [16]. Howbeit, there are few reports about separation and enrichment of oleuropein by modified MAR with CNT until now.…”

Elastic Behavior of Nanophases in Polyvinyl Alcohol (PVA)/Bamboo Charcoal (BC) Nanocomposite Films

“…As such, PVA, as one of popular biopolymers has received great attention as the alternative to general synthetic polymers owing to its good flexibility, water solubility, recyclability and biotribological properties. PVA was widely used for industrial applications such as tissue engineering, pharmaceutical formation, drug delivery, cosmetics and biosensors Dorigato and Pegoretti, 2012;Huang and Wang, 2013;Cataldi et al, 2018). Carbon based nanofillers such as carbon nanotubes (CNTs) are considered as more effective nanoreinforcements.…”