Influence of contents of chemical compositions on the mechanical property of sisal fibers and sisal fibers reinforced PLA composites

Abstract

The indiscriminate accumulation of waste materials of petrochemical origin has prompted research that leads to obtaining environmentally friendly materials using renewable raw materials. The objective of this thesis was to establish the process conditions for the extraction of microparticles of fique bagasse and the evaluation of the effect of their incorporation in a foamed material obtained from cassava starch.The extraction of the microparticles was carried out by means of a hydrolysis process with sulfuric acid using previously conditioned fique bagasse. To determine the process conditions, a 33 factorial design was run in which the acid concentration (5, 10 and 15%), temperature (70, 80 and 90 ° C) and time (3, 5 and 7h) of hydrolysis, obtaining a significant effect on the morphological, chemical and thermal properties, highlighting functional groups, morphology, color and degradation and melting temperatures characteristic of cellulose, with 10%, 70 ° C and 7h being the conditions that allowed obtaining the smallest size of particle.To determine the effect of the incorporation of the microparticles on the properties of the foams, a unifactorial design was evaluated with five levels of concentration of microparticles (0.0, 0.5, 0.75, 1.0 and 1.25%) in the mixture for obtaining foam, finding a significant effect on the properties of expansion index, density, compressibility and water absorption, being the 0.75% treatment the one that presented outstanding properties with respect to the other treatments. This indicates that fique bagasse in adequate concentrations has potential for use in the production and improvement of the properties of starch-based foams.

Mechanical response of sisal/glass fabrics reinforced polyester – polyethylene terephthalate foam core sandwich panels

“…Scanning electron microscopy (SEM) (Shimadzu equipment, model SS-550, 2 kV voltage, samples coated with gold) was also used, to evaluate the SF surface. The rougher and non-uniform surface is also in agreement with in natura SF, from literature [21]. Specific mass of the dried SF was assessed by helium gas pycnometer (Ultrapycnometer 1000, brand Quanta Chrome, 6 measurements) and showed a result of 1.41 ± 0.025 g/cm 3 .…”

Potential Natural Fiber Polymeric Nanobiocomposites: A Review

“…Sisal has a good stiffness, durability, and resistance to salty water, which is why it has been applied for a long time in twines, ropes, papers, filters, mattresses, and carpets. Some exceptional advantages of using sisal (Figure 5) fibers are related to its (1) lower density, (2) nonabrasive nature, (3) lower cost, (4) lower energy consumption, (5) higher possibility of filling level, (6) biodegradability, (7) higher specific properties, and (8) generation of an agricultural-based economy in rural areas [58]. Agave is another potential natural fiber which is receiving attention from researchers and manufacturers due to its reproducibility, lighter weight, and economical aspects.…”

Optimization of alkali-treated banana pseudo-stem fiber/PBAT/PLA bio-composite for packaging application using response surface methodology

“…Abundantly available biomass and macromolecule polymers (polyethylene, polypropylene, polyvinyl chloride) have been used to synthesize high mechanically stable composites (Razaka et al 2019;Dixit and Yadav 2020;Inseemeesak et al 2022). Lignocellulosic materials such as rice straw, corn straw, sorghum straw, soybean straw, sisal, and hemp are usually used as a substitute in polymer matrix (Xu et al 2019;Feng et al 2020;Zhu et al 2020). Due to the poor compatibility and strong stiffness of lignocellulosic material, native biomass is not very compatible with polymer materials (Bartos et al 2021;Dixit et al 2021).…”