Maghnite: an innovative inorganic reinforcement utilized in the synthesis of polyamide 12 nanocomposites with optimized thermal and mechanical properties

Abstract

This study will contribute to the identification and understanding of the reinforcement mechanisms of thermoplastic matrices by nanofillers. This aspect is addressed through the investigation of the thermal and mechanical properties of nanocomposites consisting of a polyamide 12 (PA12) matrix crammed with organically modified clay nanoparticles. An efficient approach to the synthesis of polyamide 12 (PA12) nanocomposites was investigated; Maghnite may be a processed Algerian mineral clay which will act both as a catalyst and as an inorganic reinforcement. Two sorts of organic substances were used, labeled CTA-Mag (1CEC) and CTA-Mag (2CEC), modified by cetyltrimethylammonium (CTA) ions. However, PA12/CTA-Mag nanocomposites are characterized by various physico-chemical techniques, XRD, FTIR, TGA, scanning and transmission electron microscopy (SEM and TEM). Measurements of tensile modulus, yield strength, lastingness, elongation at break and toughness were done to assess the behavior of the mechanical properties. Furthermore, we have analyzed the consequences of the mass fraction of the fillers on the structural, thermal and mechanical properties of those nanocomposites. Specific attention has been paid to the study of relationships between the macroscopic properties and therefore the structure of nanocomposites. Thermomechanical tests showed a big improvement within the properties of the nanocomposites compared to neat PA12.

Influence of Clay on Structure, Thermal Properties and Mechanics of Poly(vinyl acetate)/Maghnite Nanocomposites.

“…The elongation at break decreases as the clay platelets load the PVAc matrix. The homogeneity of the dispersion and the interaction of the maghnite phases with the PVAc matrix improve the stiffness of the composites and the reduction of the elongation at break [34] . The hardness of PVAC and its composites is given in Table 1, which shows that adding platelets increases the hardness of these polymeric materials.…”

“…The homogeneity of the dispersion and the interaction of the maghnite phases with the PVAc matrix improve the stiffness of the composites and the reduction of the elongation at break. [34] The hardness of PVAC and its composites is given in Table 1, which shows that adding platelets increases the hardness of these polymeric materials. The presence of the rigid layers of clay in the polymer effectively reduces the indentation and thus improves the hardness of the PVAC.…”

Impact of clay modifier on structure, thermal, mechanical and transport properties in polyurethane/Maghnite nanocomposites as barrier materials

“…The TPU clay nanocomposites were developed according to the method reported in the literature. [25] A 5 gram amount of polyethylene glycol was introduced into a three-necked reaction vessel and dissolved in Dimethylformamide. After swelling of the polyethylene glycol in DMF, a speci ed amount of 12-Mag (wt% based on monomer) and tolylene 2,4-diisocyanate (TDI) (0.018 mol L − 1 ) were gradually incorporated into a reaction vessel.…”

Synergistic effect of organic clay fillers based on cetyltrimethylammonium bromide in the synthesis of poly (3,4-ethylenedioxythiophene) nanocomposites

“…5 Conductive polymers, including poly(3,4ethylenedioxythiophene) (PEDOT), have attracted particular interest due to their excellent environmental stability, low oxidation potential, 6 high electrical conductivity, low band gap, and good electro-mechanical behavior, which make possible countless potential applications in high technology products and other new devices. [7][8][9][10] PEDOT has many of the most significant applications, including through-hole plating on printed circuit boards, antistatic coatings that prevent dust attraction on cathode ray tubes (CRTs), 11 primers for electrostatic spray coating of plastics, 12 sensors, 13,14 transparent electrodes for inorganic electroluminescent devices 15 in capacitors, 16,17 and fuel cell membrane applications. 18 Due to its high stability and considerable conductivity, poly(3,4-ethylenedioxythiophene) (PEDOT) is currently one of the conductive polymers used, with applications in energy conversion and sensing devices as well as in bioelectronics.…”