Properties of Single Bamboo Fibers Isolated by Different Chemical Methods
Keywords:Maceration method, contact angle, maceration time, lumen, mechanical properties
AbstractThe objective of this study was to investigate the properties of single Cizhu bamboo fibers isolated by four chemical methods, with and without ultrasonic treatment. Properties tested were static contact angle, lumen size, and mechanical properties (tensile strength, modulus of elasticity [MOE], and elongation) of fibers macerated by four methods: nitric acid and potassium chlorate, sodium hypochlorite (NaClO), hydrogen peroxide and glacial acetic acid (H2O2 + HAc), and sodium hydroxide. The results showed that the maceration time was different among the four methods. Ultrasonic treatment significantly affected the contact angle of all treatments with the exception of H2O2 + HAc. Lumen sizes treated by NaClO were different but cross-sectional area and cell wall area were similar for all other treatments, with and without ultrasonic treatment. Differences in mechanical properties were found among chemicals whereas elongation was similar for all solutions. Ultrasonic treatment accelerated the maceration rate, thus decreasing treatment time and contact angle of single fibers, but had no effect on cell wall area. Tensile strength and MOE were each affected in one solution by ultrasonic treatment, but those effects were within the range of the other solutions.
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