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Physico-Chemical and Thermal Characterization of a Lignocellulosic Fiber, Extracted from the Bast of <i>Cola lepidota</i>Stem

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Journal of Minerals and Materials Characterization and Engineering 2020年第5期8卷 377-392页

作者： ndoumou belinga rémy legrand Meva’a Lucien Ouagne Pierre Betene Ebanda Fabien Noah Pierre Marcel Atangana Ateba Jean Laboratoire de Mécanique (LME) UFD SI Université de Douala Douala Cameroun Laboratoire d’Ingénierie Civile et Mécanique Université de Yaoundé I Yaoundé Cameroun Laboratoire Génie de Production (LGP) ENI de Tarbes Tarbes France

In this research work, fiber extracted from the bark of Cola lepidota (CL) plant, grown in the flora of Southern part of Cameroon, was investigated for composites reinforcement. The investigation was carried via evaluation of water absorption capacity, moisture content, real density, porosity, chemical composition, chemical structure and thermal behaviour. It was discovered that the new fiber has relatively low moisture content and water absorption capacity similar to those of other investigated natural fibers such as flax, sisal, coconut, hemp and jute. Its porosity was found appropriate for composite production and the fiber was found to be thermally stable up to 230°C, with maximum degradation temperature of 325°C. The main constituents of the fibre include cellulose, hemicellulose and lignin. In conclusion, based on the properties investigated, this fiber is considered suitable for composite manufacture.

关键词： Cola lepidota Fiber Thermal Stability Physico-Chemical Characteristics FTIr-ATr Liber Stem

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Hybrid Composite Based on Natural rubber reinforced with Short Fibers of the Triumfetta cordifolia/Saccharum officinarum L.: Performance Evaluation

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Journal of Minerals and Materials Characterization and Engineering 2022年第5期10卷 385-399页

作者： Abel Emmanuel Njom Armel Mewoli Marie Josette Ndengue Fabien Betene Ebanda Augustine Demze Nitidem Sandrine Biloa Otiti Yannick Devario Youssi Bang legrand ndoumou belinga Pierre Marcel Anicet Noah Atangana Ateba Department of Mechanical Engineering ENSET University of Douala Douala Cameroon Laboratory of Materials Mechanics Structures and Integrated Manufacturing National Advanced School of Engineering University of Yaoundé 1 Yaoundé Cameroon Laboratory of Engineering Civil and Mechanics National Advanced School of Engineering University of Yaoundé 1 Yaoundé Cameroon Laboratory of Mechanics University of Douala Douala Cameroon Mechanics and Adapted Materials Laboratory (LAMMA) ENSET Douala Cameroon

This article contributes to the development of the new class of fully biodegradable “green” composites by combining fibers (natural/bio) with biodegradable resin. The vegetable fibers (Triumfetta cordifolia and sugarcane bagasse) treated with NaOH and bleached were incorporated into a natural rubber matrix. The influence of the fiber ratio on the physical properties, tensile strength and surface hardness of the hybrid composites was analyzed. The results show that the addition of fibers in the natural rubber matrix increases the water absorption capacity but gradually reduces it with increasing fiber ratio. The hybrid composites of the NrT50-50B proportions show the best tensile strengths at 20 phr and a shore A hardness of 43.7 at 30 phr. The combination of two fibers has improved the physical and mechanical properties of the hybrid composites which can be used in engineering applications.

关键词： Hybrid Composites Triumfetta cordifolia Fiber Sugarcane Bagasse Fiber Natural rubber Shore a Hardness

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