Effect of ZnO, SiO₂ and Al₂O₃ Doped on Morphological, Optical, Structural and Mechanical Properties of Polylactic Acid

Abstract

In this study, an experimental investigation of the effect of addition of Alumina (Al2O3), Zinc Oxide (ZnO), and Silicon Oxide (SiO2) particles powders on the mechanical behavior and crystallinity of the PLA films was carried. Granulated of Polylactic acid (PLA) and ceramic powders with different concentrations were prepared to form PLA/ZnO and PLA/ZnO-SiO2-Al2O3 composites films using a solvent casting process. Morphology of PLA and composite films were examined by optical microscopy, chemical and crystal structures of composites are analyzed by (ATR-FTIR) spectroscopy and XRD techniques. Tensile strength and young modulus are determined by traction test. The obtained result by optical microscopy shows the micrograph of PLA samples with different composition are evenly distributed on the film surface. The intensity of the absorption band located at 754 cm-1 which correspond to the crystalline phase of PLA is verified by the ATR-FTIR characterization. The XRD diffraction shows that the ceramic particles influence on the peaks intensity of PLA films localized at 19.5 ° C and 22.5 ° C, which indicate an augmentation in the crystallinity of the composite films. Mechanical tests show Tensile strength and Elasticity modulus are improved after the addition of Oxide Particles to Polylactic acid films.

Enhancing Structural and Thermal Properties of Poly(lactic acid) Using Graphene Oxide Filler and Anionic Surfactant Treatment

“…The band centered at 1182 cm −1 corresponds to the C-O stretching bond in the CH-O groups of PLA and PLLA. These findings are consistent with those of several studies [42,45,46].…”

“…The XRD analysis of PLA and PLLA corroborates the information reported in the previous literature, indicating that the peaks at 16.7°, 18.9°, and 22.1° correspond to the α-crystalline phase of PLA crystallizing in an orthorhombic symmetry [28,32,51]. Also, the shapes of the PLA and PLLA XRD patterns indicate that the matrix morphology presents some degree of an amorphous phase [42,46,50]. The nanocomposites have similar XRD patterns to those of the neat PLLA and PLA (all PLLA and PLA with characteristic peaks are observable in the composites, indicating that the addition of GO did not significantly modify the crystal structure of poly(lactic acid) in the nanocomposites).…”

The Effect of Nano Zirconium Dioxide (ZrO2)-Optimized Content in Polyamide 12 (PA12) and Polylactic Acid (PLA) Matrices on Their Thermomechanical Response in 3D Printing

“…In Figure 11 C,D, the tensile test findings regarding the strength and modulus of elasticity values are reviewed for all 3DP tensile specimens. ZrO 2 NPs showed a positive reinforcement effect for all samples fabricated with the 3D printing process, with the greatest increase observed at 1.0 wt.% for PLA (20.1% and 63.8%, respectively) and at 3.0 wt.% for PA12 (47.7% and 16.1%, respectively) [ 100 , 101 , 102 , 103 ].…”

Novel Photocatalyst Ag/ZnO/BC Nanofilms Degradation of Low Concentration Ammonia Nitrogen Wastewater

“…The chemical bonding and functional group composition of the Ag/ZnO/BC nanofilm composites were analyzed by FTIR. As shown in Figure 7, Ag/ZnO/BC nanofilm composites show stretching vibration peaks at 433 cm −1 (stretching vibration peak of Zn-O bond), 1058 cm −1 (stretching vibration of C-O-C), 1402 cm −1 (stretching vibration of C-O bond/C=O bond), 1630 cm −1 (stretching vibration of C=O bond), 2853-2920 cm −1 , 3442 cm −1 , while also showing a stretching vibration peak at 1058 cm −1 (impurities from potassium bromide used in the compression process) [16]. It is worth noting that the peak intensity of Ag/ZnO/BC nanofilm composites at 1402 cm −1 and 1630 cm −1 is significantly higher than that of ZnO and Ag/ZnO materials, indicating that maize straw biochar is rich in functional groups such as hydroxyl, carboxyl and carbonyl groups, and the peak intensity of the stretching vibration peak at 3442 cm −1 is further increased, indicating that the adsorbed oxygen content on the surface of the material has increased, which is more beneficial to improve the photocatalytic activity of ZnO materials.…”