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Mochamad Asrofi,Hairul Abral,Anwar Kasim,Adjar Pratoto,Melbi Mahardika,박지원,김현중 한국섬유공학회 2018 Fibers and polymers Vol.19 No.8
The successful isolation and characterization of water hyacinth fiber (Eichornia crassipes) (WHF) nanocellulose is presented in this study. The novelty was in exploring a wider range of properties of highly purified samples of WHF after each stage of production in more depth. The isolation was accomplished by pulping in a digester and sonication. Morphological changes before and after treatment were demonstrated by scanning electron microscopy (SEM). The lignin and hemicellulose content decreased during chemical treatment. Transmission electron microscopy (TEM) and particle size analyzer (PSA) were used to determine the morphology of WHF after sonication for 1 h. TEM shows that the diameter and length of nanocellulose WHF were 15.61 and 147.4 nm, respectively. The crystallinity index and crystalline domain area significantly increased after chemical treatment. The highest crystallinity index was 84.87 % after an acid hydrolysis process. The increase in crystallinity leads to good thermal stability. Moisture absorption tests of WHF were carried out before and after treatment. The lowest moisture absorption was in the cellulose fiber after sonication (nanocellulose).
Muhammad Rizal Muhammad Asyraf,Mohamad Ridzwan Ishak,Mohd Nor Faiz Norrrahim,Abdul Latif Amir,Norizan Mohd Nurazzi,Rushdan Ahmad Ilyas,Mochamad Asrofi,Mazlan Rafidah,Muhammad Rizal Razman 한국섬유공학회 2022 Fibers and polymers Vol.23 No.4
Man-made composites are vastly implemented in various engineering applications, particularly in cross-arm component of latticed transmission tower. However, their practice in this sector has increased pollutant emissions and landfill areas. Thus, scientists and engineers have been driven to look for other ‘greener’ alternative materials that have low-cost and renewable sources. Flax fibers and poly(lactic) acid (PLA) biopolymer have been extensively used to develop vast green composite structural products because of their great mechanical behaviours. A comprehensive understanding of properties of composite materials is essential to evaluate their applicability, especially in structural applications. This manuscript discusses the physic-mechanical properties and processing and manufacturability of flax fiber, PLA biopolymer and their composites. This review also comprehensively discovers the potential of fabric flax fiber-reinforced PLA composites for cross-arm application. The chemical composition, extraction, treatment and fabrications of these fiber and biopolymer are elaborated deeply given that these aspects are essential for the development of green composite cross-arm.