SISAL

About: SISAL is a research topic. Over the lifetime, 1878 publications have been published within this topic receiving 55528 citations.

Selected mechanical properties of sisal aggregates (Agava sisalana)

Abstract: The effects of gauge length and test speed on the tenacity and strain of sisal aggregates (Agava sisalana) were determined. Tenacity was generally higher with shorter gauge lengths and slower test speeds. Strain was higher with shorter gauge lengths. However, the effect of test speed on both tenacity and strain was not the same at every gauge length. The mode of fibre failure appeared to differ with the test conditions. Longer specimens and those tested at faster speeds were prone to higher levels of longitudinal splitting. The effects of different ageing regimes on tenacity and strain of sisal aggregates were also determined. Tenacity was affected by elevated temperature and UV; strain by UV and simulated natural ageing.

Strength Properties of Surface Modified Kenyan Sisal Fibres

Abstract: This study aimed at determining and comparing the mechanical properties of natural, mercerized, and cornified sisal fibers. Sisal fiber morphology was modified by mercerization using a 0.06 Molar s...

An Experimentation of Chemical and Mechanical Behaviour of Epoxy-Sisal Reinforced Composites:

Abstract: In this work the variation of mechanical properties like tensile, impact and chemical resistance properties of randomly oriented sisal/glass fibre reinforced hybrid composites with different fibre

Synthesis and characterization of short sisal fibre polyester composites

Abstract: Natural fibres have the potential to replace synthetic fibres for making polymer composites because of their good engineering properties. Sisal fibres obtained from the leaves of the sisal plant exhibit high strength among various other natural fibres, but have not been yet fully explored. Nevertheless, the impact of sisal fibre in polymer composites depends on sisal fibre extraction process, characteristic of fibre, fibre binder ratios, synthesizing technique, etc. In the present study, a detailed experimental protocol was conducted for sisal cultivation, fibre extraction, processing and development of composite boards/panels and assessed the impact of incorporation of chopped strand sisal fibre mat on the mechanical behaviour of polyester composites. The results revealed that the diameter of sisal fibre harvested after 5 years of its cultivation varied from 275 to $$475\, {\upmu }\hbox {m}$$ with a tensile strength of 121–337 MPa; tensile modulus of 2.59–10.47 GPa; elongation at break varied from 3.37 to 10.86%. It is imperative to note that the mechanical properties of sisal composites significantly improved with the incorporation of chopped strand sisal fibre mat (preform). The tensile, flexural and impact strengths of composites developed using chopped short sisal fibre mat (preform) were $$45.87\pm 3.2$$ , $$102.29\pm 9,33{,}954\pm 5288\, \hbox {J m}^{-2}$$ , respectively. The findings of the study revealed the effectiveness of sisal fibre as reinforcing materials in polyester composites for use in building construction products and automotive applications.

Influência da adição e da modificação química de uma carga mineral nanoparticulada nas propriedades mecânicas e no envelhecimento térmico de compósitos poliuretano/sisal

Abstract: This work deals with filler hybridization effects, by the addition of a nanoparticulate mineral filler (bentonite), on the mechanical performance of compression molded Polyurethane/sisal composites with 25 wt % fiber content. Composite tensile and impact properties were evaluated as a function of mineral filler content (0-10 wt %) and chemical modifications. Thermal aging effects onf tensile (s, E, e) properties of selected composites were also ascertained. The mineral filler (Brasgel PA sodium bentonite) was employed in the following forms: a) as received; b) treated with a 0,6N HCl solution; c) chemically modified with dodecyl dimethyl benzyl ammonium chloride (Dodigen) and d) chemically modified with cetyl trimethyl ammonium bromide (Cetremide). Our results show that bentonite addition increases the mechanical properties of PU/sisal composites and that best overall mechanical performances was achieved with addition of the hydrochloric acid trated mineral filler. Thermal aging for short times (up to 4 days) led to small increases in composite's elastic modulus na tensile strengths, which was attributed to post-curing of the matrix. Long thermal exposure (32 days) led to decreases in composite tensile properties (s, E, e), which was attributed to oxidative degradation of both: matrix and sisal fibers. The most thermally resistant composite was the hybrid (PU/sisal-bentonite) whose mineral filler was chemically modified with Cetremide. DRX and SEM data indicate the hybrids with organofilized bentonites to be composed of micro and nanocomposite structures.