Effect of nanoclay on mechanical and morphological properties of poly(lactide) acid (PLA) and polypropylene (PP) blends

The principal objective of this study was to assess the capability of waste rice husk fibers as reinforcement for recycled plastics. The fabrication of Wood-plastic composites (WPCs) based on rice husk (RH) fibers and recycled linear low polyethylene in the presence of maleic anhydride grafted polyethylene (3 phc) were made by melt blending method. The impact of nanosilica and nanocaly, at different concentrations (2, 4, and 6 phc) on morphological, physical–mechanical and thermal properties of the prepared WPCs were studied to distinguish the most efficient nanoparticle. The highest improvement of mechanical properties was achieved at 6phc nanosilica loading and 4phc nanoclay. At a high level of nanoclay loading (6phc), increased population of clay pellets leads to agglomeration, and stress transfer gets blocked. Izod impact strength was decreased by the incorporation of different nanoparticles in contrast with the hardness. The addition of different nanoparticles decreased the water absorption and thickness swelling of composites. The interaction of the rice husk fibers with the polymer matrix as well as the impact of nanosilica and nanoclay in the improvement of the adhesion was shown by scanning electron microscopy (SEM). In addition, the thermal stability showed slightly improved by the addition of nanoparticles, but there are no perceptible changes in the values of melting temperature by increasing the nanosilica and nanoclay content. The degree of crystallinity (Xc) of the composites decreased with the incorporation of RH fibers and increased with the addition of nanoparticles. The finding demonstrated that WPCs treated by nanosilica had the most elevated properties than nanoclay.

Effect of Nanosilica and Nanoclay on the Mechanical, Physical, and Morphological Properties of Recycled Linear Low Density Polyethylene/Rice Husk Composites

The effects of nanoclay content were investigated vs. the mechanical, thermal, and morphological characteristics of a nanocomposite made from poplar wood flour and polypropylene. The wood flour, polypropylene, nanoclay, and the maleic anhydride grafted polypropylene (MAPP) were mixed in an extruder, and the test specimens were made via injection casting. Then, the mechanical and thermal properties were examined. The results showed that the tensile strength, flexural strength, and flexural modulus were improved when the wood flour content increased from 40% to 50%. Additionally, increasing the wood flour content from 40% to 60% enhanced the tensile modulus. The addition of nanoclay at dosages up to 2 wt% enhanced the tensile strength and the tensile modulus, whereas these properties were degraded with the addition of nanoclay at up to 4 wt%. The tensile strength and flexural modulus improved when the nanoclay content increased up to 4 wt%. The crystallinity enthalpy decreased when the wood flour content increased.

https://ojs.cnr.ncsu.edu/index.php/BioRes/article/download/BioRes_14_4_8267_Khakifirouz_Nanoclay_Mechanical_Thermal_Property/7121

Nanoclay’s Influence on Mechanical and Thermal Properties of a Polypropylene/Poplar Wood Flour Nanocomposite

Effects of nanosilica and aluminum hydroxide were considered relative to thermal, flammability, and morphological properties of nanocomposites from recycled high-density polyethylene (rHDPE) and old corrugated container (OCC) pulp. Amounts of 50% recycled high-density polyethylene and 50% OCC flour were used. The nanosilica was used at three weight levels of 0%, 5%, and 10%. Lastly, aluminum hydroxide at a constant level of 5% and maleic anhydride grafted polyethylene at a constant level of 3% were mixed by twin screw extruders. The samples were made using a hand-press. The thermal and flammability properties were then measured. To consider the structure and function of nanosilica, the morphological characteristics of wood-plastic composites (WPC) were studied by X-ray diffractograms (XRD) and scanning electron microscopy (SEM) analyses. The results showed that increasing the nanosilica content up to 10% increased the thermal stability, and more charcoal was retained. Moreover, the limited oxygen index increased. X-ray diffractograms showed that the width and peak intensity decreased with the increased intake of silica nanoparticles. The SEM images showed that more adaptability was achieved through increasing the amount of nanosilica. Additionally, better and more homogenous bonds were observed between the fibers and connection matrix, and fewer gaps and pores were observed.

https://bioresources.cnr.ncsu.edu/wp-content/uploads/2020/03/BioRes_15_2_3382_Samariha_B_Effect_NanoSilica_AlOH3_Props_HDPE_OCC_Composite_16923.pdf

Effect of Nanosilica and Aluminum Hydroxide on Thermal, Flammability, and Morphology Properties of Nanocomposite made of Recycled High-Density Polyethylene and OCC Flour

The effect of lignocellulosic material and nanoclay on physical, mechanical and morphological properties of wood plastic composite

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Nanoclay’s Influence on Mechanical and Thermal Properties of a Polypropylene/Poplar Wood Flour Nanocomposite