Impact and Tensile Properties of Polyester Nanocomposites Reinforced with Conifer Fiber Cellulose Nanocrystal: A Previous Study Extension

Abstract

In a recent paper, novel polyester nanocomposites reinforced with up to 3 wt% of cellulose nanocrystals (CNCs) extracted from conifer fiber were characterized for their crystallinity index, water absorption, and flexural and thermal resistance. The use of this novel class of nanocomposites as a possible substitute for conventional glass fiber composites (fiberglass) was then suggested, especially for the 1 and 2 wt% CNC composites due to promising bending, density, and water absorption results. However, for effective engineering applications requiring impact and tensile performance, the corresponding properties need to be evaluated. Therefore, this extension of the previous work presents additional results on Izod and tensile tests of 1 and 2 wt% CNC-reinforced polyester composites, together with a comparative cost analysis with fiberglass. The chemical effect caused by incorporation of CNCs into polyester was also investigated by FTIR. In comparison to the neat polyester, the Izod impact energy increased 50% and 16% for the 1 and 2 wt% composites, respectively. On the other hand, the tensile strength and Young’s modulus remained constant within the ANOVA statistical analysis. FTIR analysis failed to reveal any chemical modification caused by up to 2 wt% CNC incorporation. The present impact and tensile results corroborate the promising substitution of a polyester composite reinforced with very low amount of CNCs for common fiberglass in engineering application.

Evaluation of the Antimicrobial, Thermal, Mechanical, and Barrier Properties of Corn Starch–Chitosan Biodegradable Films Reinforced with Cellulose Nanocrystals

“…According to the results obtained by Maradini, Oliveira [ 52 ], the tensile strength and Young’s modulus of polyester can be improved with the addition of 1% ( w / w ) of CNC; however, when the concentration is increased to 2%, the mechanical performance is negatively affected. Although the addition of 4.5% CNC in PLA-gelatin multilayer films significantly reduced the tensile strength and elongation, this nanocomponent was not a viable alternative to reinforce this polymeric matrix [ 22 ].…”

Effect of micro‐sized luffa cylindrica fibers on the mechanical properties of epoxy epikote 828

“…When the reinforced of MLCFs content was increased from 0 to 2.0 wt.%, the izod impact strength increased by 94.4% (from 3.6 KJ/m 2 to 7 KJ/m 2 ). Previous studies [ 40‐41 ] have also shown that adding nanocellulose microfibers to the polymer matrix improves mechanical properties, particularly izod impact strength.…”

“…When the reinforced of MLCFs content was increased from 0 to 2.0 wt.%, the izod impact strength increased by 94.4% (from 3.6 KJ/m 2 to 7 KJ/m 2 ). Previous studies [40][41] have also shown that adding nanocellulose microfibers to the polymer matrix improves mechanical properties, particularly izod impact strength. The results in figure 8 show that, in the composite sample without MCLF as reinforcement, the fracture surface of the sample was smooth, indicating the brittle nature of the material.…”

Synthesis and Characterization Unsaturated Polyester Resin Nanocomposites Reinforced by Fe2O3+ Ni Nanoparticles: Influence on Mechanical and Magnetic Properties

“…Its unique properties, such as a high ratio of the spin polymerization, ferromagnetic ordering, high magnetic moment and high conductivity are important to choose this material as reinforcements to prepare nanocomposites [10]. However, the disadvantages of polyester like low toughness limits its industrial applications for engineering components subjected to the impact energy [11]. There are many investigations published in this field, Rahman et al [12] investigated the effect of different gamma radiation doses about 0-15 KGy on the mechanical properties of (UPR) unsaturated polyester resin reinforced by Fe2O3 nanoparticles.…”