Mechanical Properties of Biocomposite with Various Composition of CaCO3 and Starch

Setiawan, Agris and Wahyuningsih, Fransisca Diana and Mirahati, Riria Zendy (2023) Mechanical Properties of Biocomposite with Various Composition of CaCO3 and Starch. Journal of Mechanical Engineering Science and Technology, 7 (1). pp. 1-9. ISSN 2580-0817

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Abstract

Calcium carbonate has the potential to be used in the development of medical materials, including
biomaterials. Biocomposite is composed of CaCO3 as matrix material and bioplastic from the combination
of corn starch and cassava starch as reinforcement. This study aims to determine mechanical properties such
as tensile strength and bending/flexural strength with varying compositions of CaCO3 and bioplastic.
Characterization of the biocomposite uses Scanning Electron Microscope to observe the microstructure and
composition elements of their structure. This study used 4 variations in the ratio of CaCO3 suspension: (Corn
Starch + Cassava Starch). Each sample was characterized using specimen code A for composition 30:70
(w/w)% and specimen B for composition 40:60 (w/w)%, specimen C for composition 50:50 (w/w)%, and
specimen D for composition 60:40 (w/w)%. Based on the results of shrinkage measurements on flexural
strength specimens, specimen B has the lowest percentage value of 15±0.01%. The lowest tensile strength
specimen is found in specimens C and D at 12±0.01%. The tensile test results also showed that specimen D
had a higher ultimate strength value than the other specimens, which was 0.06±0.03 MPa. Microstructure
characterization was carried out using scanning electron microscopy with energy-dispersive X-ray
spectroscopy, which revealed the presence of Oxygen at approximately 48.39% mass, Carbon at
approximately 30.27% mass, Nitrogen at approximately 11.77% mass, Calcium at approximately 9.57%
mass, with Calcium being detected in the form of Calcium Carbonate (CaCO3). Bending strength, biocomposite, bioplastic, CaCO3, cassava starch, tensile strength

Item Type:	Article
Uncontrolled Keywords:	Bending strength, biocomposite, bioplastic, CaCO3, cassava starch, tensile strength
Subjek:	T Technology > TN Mining engineering. Metallurgy
Divisions:	Fakultas Teknologi Mineral dan Energi > Teknik Metalurgi (S1)
Depositing User:	ST.,MT. Riria Zendy Mirahati
Date Deposited:	15 Jul 2025 01:56
Last Modified:	15 Jul 2025 01:57
URI:	http://eprints.upnyk.ac.id/id/eprint/43087

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