Nanocomposite materials based on chitosan and molybdenum disulfide

Abstract

Molybdenum disulfide (MoS 2 ) was lithiated with n-butyllithium to obtain LiMoS 2 . The exfoliation and re-stacking properties of LiMoS 2 allowed for the facile intercalation of chitosan into the re-stacked layers of MoS 2 . A series of nanomaterials were synthesized, and characterized by powder-X-ray diffraction, thermogravimetric analysis, and four-probe electrical conductivity measurements. The chitosan-MoS 2 nanomaterial at 1:1 mol ratio displayed an increase in electrical conductivity value by a factor of 100 with respect to the pristine layered structure.

An in situ polymerization approach for functionalized MoS2/nylon-6 nanocomposites with enhanced mechanical properties and thermal stability

“…Chemical exfoliation of bulk MoS 2 using lithium intercalation, which can produce single layer MoS 2 sheets in aqueous solution, has been reported for many years. 12 Therefore, most of the MoS 2 /polymer composites are focused on water-soluble polymers such as poly(vinyl alcohol), 13 poly-(ethylene oxide), 14 and chitosan, 15 prepared through a solution blending method. Very recently, MoS 2 has broadened its application in epoxy resin as a reinforcing additive.…”

Multifunctional Nanohybrids by Self-Assembly of Monodisperse Iron Oxide Nanoparticles and Nanolamellar MoS2 Plates

“…It is noteworthy that, in the case of layered MoS 2 -based materials obtained from single-layer MoS 2 dispersions, guest molecules may position themselves between the MoS 2 layers, forming the material with regularly spaced MoS 2 monolayers and guest molecules. ,− ,− The distance between layers compared to parent MoS 2 , that is, interlayer expansion, Δ c , depends on the guest molecule size. For example, in the case of sufficiently bulky clusters, it reached ∼1.5 nm .…”

Hall–Petch Relationship and Dislocation Model for Deformation of Ultrafine-Grained and Nanocrystalline Metals

“…51,59,60) On the other hand, it has been pointed out that as a propagating dislocation traverses the grain towards the opposite boundary, its two ends may be pinned by GB impurities or ledges. 56,61,62) When such pinning occurs, the depinning process can be a rate-controlling step of the thermallyactivated deformation of UFG materials.…”