Pyrolysis kinetics and mechanical properties of poly(lactic acid)/bamboo particle biocomposites: Effect of particle size distribution

Abstract

<jats:title>Abstract</jats:title><jats:p>Bamboo particle (BP)-reinforced poly(lactic acid) (PLA) biocomposites were fabricated. The effect of the BP particle size distribution on the pyrolysis and mechanical properties of PLA biocomposites was evaluated. The optimum particle size of BP for improving the tensile strength PLA biocomposites is 200 mesh (16.6–84.5 µm). The pyrolysis mechanism and kinetics were studied according to the Coats–Redfern method. The addition of BP inhibited the pyrolysis process of PLA. The activation energy of biocomposites ranged from 120.7 to 151.5 kJ/mol, which is significantly higher than that of the neat PLA. The pyrolysis mechanisms of biocomposites are attributed to the chemical reaction at low pyrolysis temperature (270–400℃) and ash layer diffusion control at high pyrolysis temperature (400–600℃). Crystallization behavior of biocomposites showed that small BPs in PLA biocomposites generated more cross-linking points in the PLA matrix, which constrained the movement of the molecular chain and acted as an effective nucleating agent in promoting the crystallization process. The pyrolysis behavior and mechanical properties analysis provide critical information for potential large-scale production of the PLA biocomposites.</jats:p>

Utilization of Tea Industrial Waste for Low-Grade Energy Recovery: Optimization of Liquid Oil Production and Its Characterization

“…Only 7.38% and 4% differences were found for char and gas yield between these selected particle sizes. is is similar to previous investigations [28][29][30], which found that if the particle size was small enough, the particle could be heated uniformly. is study revealed that mass-and heat-transfer constraints had a significant impact on oil yield at large particle sizes exceeding 1.0 mm, resulting in lower liquid yield.…”

Degradation modeling of poly-l-lactide acid (PLLA) bioresorbable vascular scaffold within a coronary artery

“…Its role on the stent degradation could be included in our future work if quantitative experimental data are available. The mechanical properties and degradation behavior of the PLLA material could be influenced by its crystallinity degree, which was associated with the fabrication techniques [ 5 , 36 , 37 ]. This could be potentially used to regulate its degradation time.…”

Designing and 3d Printed Pla Based Implant Used in Treatment for Unilateral Vocal Cord Paralysis

“…Its elastic modulus is between 1.5-2.7 GPa and glass transition temperature is around 60 °C. Thus, PLA offers great mechanical properties, provides easy blending with many plasticizers to achieve desired rigidity [36]- [38]. In addition, stabilization properties of printed structure are very favorable.…”