Characterization of alkali treated and untreated new cellulosic fiber from Saharan aloe vera cactus leaves

摘要

Highlights ? Novel natural Saharan Aloe Vera Cactus Leaves fibers were characterized in this work. ? Effects of alkali treatment on the fibers were studied. ? Chemical composition was determinate by using standard test methods. ? Mechanical and thermal behavior was investigated by single fiber test and Thermogravimetric Analysis. ? Characterized fiber has the potentiality to replace the harmful artificial fiber. Abstract The aim of this study is to examine the use of new natural fibers, which are extracted from the Saharan aloe vera cactus plant leaves as reinforcement in polymer composites. The physicochemical, mechanical and thermal properties of the Saharan Aloe Vera Cactus Leaves (SACL) fibers are investigated, through the effect of alkali treatment. The contents of α-cellulose, hemicellulose, wax and moisture present in SACL fibers were characterized by standard test methods The mechanical properties of SACL fibers were measured through single fiber tensile test. The interfacial strength between the fiber and matrix was estimated by the fiber pull-out test. These results ensure that the chemical and mechanical properties of the fibers are improved after the alkali treatment. FT-IR spectroscopic analysis confirms that the alkali treatment process has removed certain amount of amorphous materials from the fibers. XRD analysis results show that the alkali treatment has enhanced the Crystallinity Index and Crystalline Size of the fibers. Thermal behavior of the fibers was analyzed by using TGA. The thermal stability and the thermal degradation temperature increases after the alkali treatment of fibers. The morphologies of fibers were analyzed by SEM and prove that the fiber surfaces become rough after alkali treatment. ]]>