Abstract：
:This paper characterizes properties of biocomposite sonicated during gelatinization. The biocomposite consisted of tapioca starch based plastic reinforced by 10% volume fraction of water hyacinth fiber (WHF). During gelatinization, the biocomposite was poured into a rectangular glass mold then vibrated in an ultrasonic bath using 40kHz, 250W for varying durations (0, 15, 30, and 60min). The resulting biocomposite was then dried in a drying oven at 50°C for 20h. The results of this study indicate that a biocomposite with optimal properties can be produced using tapioca starch and WHF if the gelatinizing mixture is exposed to ultrasound vibration for 30min. After this vibration duration, tensile strength (TS) and tensile modulus (TM) increased 83% and 108%. A further 60min vibration only increased the TS at 13% and TM at 23%. Moisture resistance of the biocomposite after vibration increased by around 25% reaching a maximal level after 30min. Thermal resistance of the vibrated biocomposites was also increased.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Asrofi M,Abral H,Putra YK,Sapuan SM,Kim HJdoi
10.1016/j.ijbiomac.2017.11.165subject
Has Abstractpub_date
2018-03-01 00:00:00pages
167-176eissn
0141-8130issn
1879-0003pii
S0141-8130(17)33891-6journal_volume
108pub_type
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