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

Abstract

In this study, carboxyl graphene-grafted modified high-density polyethylene (CG-g-MHDPE), a new nano-material prepared from grafting MHDPE with CG, was combined with high-density polyethylene (HDPE) through melt-mixing to prepare HDPE/CG-g-MHDPE nanocomposites (with different proportions of HDPE and CG-g-MHDPE). It is hoped that the new nano-material could reduce the occurrence of graphene agglomeration in nonpolar substrates. Fourier-transform infrared spectroscopy showed that CG-g-MHDPE was successfully synthesized. The results from microscopic characterization, mechanical performance test, thermal analysis, and barrier-property evaluation indicated that the mechanical properties, crystallinity, thermal properties, and barrier properties of HDPE/CG-g-MHDPE nanocomposites with a low content of CG-g-MHDPE (4 and 8%) were greatly improved compared with those of pure HDPE, and the compatibility between graphene and HDPE was effectively enhanced. With increasing added amount of CG-g-MHDPE, the overall performance of the nanocomposites decreased significantly. Adding 8% CG-g-MHDPE led to the production of a nanocomposite with the best performance. Reinforced HDPE nanocomposites with better performance would have a wider range of applications.

Preparation, Characterization, and Bioactivity Evaluation of Polyoxymethylene Copolymer/Nanohydroxyapatite-g-Poly(ε-caprolactone) Composites

“…The two absorption bands at 2981 and 2923 cm −1 can be attributed to symmetric stretching vibrations (ν) of CH 2 groups, absorption band at 1468 cm −1 to bending vibrations (δ) and band at 1381 cm −1 to the wagging vibrations of the same groups [ 17 , 18 ]. Strong absorption bands at 1090 cm −1 arise from stretching vibrations of C-O-C groups [ 19 , 20 ].…”

Barrier Properties and Hydrophobicity of Biodegradable Poly(lactic acid) Composites Reinforced with Recycled Chinese Spirits Distiller’s Grains

“…The surface of pure PLA (Figure 4a) was dense and uniform. It is observed that the fracture surface of PLA/CSDG composites There are obvious sharp diffraction peaks in PLA at 2θ = 16.52 and 18.87 • , which refer to (200/110) and (203) planes corresponding to typical α crystals of PLA [33,34]. Throughout the spectral curve, PLA/CSDG with 10% and 30% CSDG had almost no shift in peak, indicating that the crystal morphology was basically unchanged [35].…”

Hydrophilic Nanocomposite Films with a Fence-Structure-Induced Labyrinth Effect for Greenhouse Cooling and Light Enhancement

“…The delamination of JW-M led to an increase in the base layer spacing, which significantly improved the dispersion level in the matrix. There was a high degree of strong bonding between JW-M nanofillers and polymer molecular chains, thus leading to significant changes in polymer chain dynamics. − The relative slip motion of transverse matrix chains was reduced due to the increase in cross-linking sites and the existence of JW-M agglomerates which led to a decrease in the transverse elongation at the break of PE. ,− In addition, the tensile strength was improved because of the ability of inorganic nanoparticles to withstand tensile stress. − Longitudinal traction during the blown film process slightly removed the physical intersection of JW-M and PE molecular chains, which also led to an increase in longitudinal elongation at break.…”