Characterization of network bonding created by intercalated functionalized graphene and polyvinyl alcohol in nanocomposite films for reinforced mechanical properties and barrier performance

Abstract

Graphene that consists of less than 10 layers is expensive; moreover, it tends to agglomerate. These disadvantages restrict its utility. In this regard, the present study aimed to reduce the number of layers of a functionalized graphene (FG) with 10-30 layers to less than 10 layers by using an ultrasonic processor. We prepared nanocomposite films of polyvinyl alcohol (PVA) incorporated with FG by a simple hydrothermal method and ultrasonic dispersion. Oxygen transmission rate and water vapor permeability were considerably increased on account of modifying PVA with FG. Furthermore, the mechanical properties, thermostability, and barrier properties were improved. The barrier efficiency of the nanocomposites at different temperatures remained high for long periods of operation because of the network bonding.11 These author contributed equally.

Barrier and Biodegradable Properties of Poly(butylene adipate-co-terephthalate) Reinforced with ZnO-Decorated Graphene Rendering it Antibacterial

“…However, when the content of ZnO-graphene exceeds 0.6%, the oxygen barrier performance increases. This may be caused by the uneven dispersion of nanomaterials in the polymer matrix and the formation of agglomerates, which would affect the oxygen barrier performance of the nanocomposite film. , In the nanocomposite material system of PBAT- g -MAH/ZnO-graphene, the trend of its OP coefficient is basically similar to that for the nanocomposite material of PBAT/ZnO-graphene. This is mainly due to the coordination reaction and hydrogen bond between PBAT- g -MAH and ZnO-graphene (see Figure d), leading to better compatibility.…”

Thermal Properties and Barrier Performance of Antibacterial High-Density Polyethylene Reinforced with Carboxyl Graphene-Grafted Modified High-Density Polyethylene

“…In the nanocomposites, molecules could not pass through the nanoparticles and could only move around them (Figure a). Compared with a simple polymer, nanocomposites had water molecules and oxygen dispersed along a vertical path (Figure b); nanocomposites extended the molecular diffusion path and enhanced the barrier properties. − The principle of permeability tests for water molecules and oxygen is depicted in Figure c.…”

The preparation of modified polyamide clay nanocomposite/recycled maleic anhydride polyamide 6 and blending with low density polyethylene for film blowing application

“…The technical development of polymer blends is a market trend to serve as an economical and effective method for developing new resins. 3,4 The polymer blending methods can be categorized as: 1. miscible blends, such as polyphenylene oxide/polystyrene and poly(vinyl chloride)/selected polyesters. The properties of such blends are usually additive.…”

“…Immiscible blends: The mutual compatibility of such blends is extremely low, requiring the addition of another functional polymer such as surfactant or a compatibilizer. The addition of a compatibilizer can reduce the surface tension between incompatible polymer blends 1–11 It can prevent the coagulation of disperse phases and improve their stability in the matrix along with the fine distribution characteristics. 12–14…”