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Manufacture and Characterization of hemp-Acrodur Biocomposites: Variation of Process Parameters

Year: 2022

Journal: Fiber. Polym., Volume 23, AUG, page 2261–2270

Authors: Islam, Mohammad S.; Miao, Menghe

Organizations: CRC-ACS, Australia

Keywords: Acrodur; Polymer-matrix composites; Hemp fibre mats; Biocomposites; Compression moulding

In this study, hemp fibre reinforced Acrodur resin biocomposites were manufactured using nonwoven hemp fibre mats by varying a range of processing parameters such as Acrodur solution to dispersion ratio, relative humidity, curing time, and temperature. Dry fibre mats using Acrodur solution to dispersion ratio of 3:1 at a temperature of 160 degrees C and processing time of 20 minutes were found to be optimum condition for the manufacture of the biocomposites. These optimum parameters gave the best combination of specific tensile strength (26.4 MPa-cm(3)/g) and specific Young's modulus (4.4 GPa-cm(3)/g) with a density of 0.94 g/cm(3). Thermogravimetric analysis (TGA) of the optimised biocomposites showedsimilar thermal stability when compared with pristine fibres. Contact angle measurements of the optimised biocomposites showed increased hydrophobicity of the biocomposites than those of the pristine fibres. From the water immersion test, the path of wicking of water molecules into the biocomposites was believed to be rather straight than tortuous and A 4-week water immersion test of the optimised biocomposites conceded about 43.5 % loss of tensile strength and 57.1 % loss of Young's modulus which was believed to be due to wicking of the water molecules into the fibre of the biocomposites in a straight path rather than a tortuous path.