Mechanichal and antimicrobial properties of pla/jackfruit skin composites containing thymol and nanocellulose

Ahmad Fuad, Mohamad Syazwan (2019) Mechanichal and antimicrobial properties of pla/jackfruit skin composites containing thymol and nanocellulose. [Project Paper] (Submitted)

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Abstract

The aim of this project is to study the effect of different loading of nanocellulose (NC) on the mechanical and thermal properties of PLA/Jackfruit skin based composites and to study of effect to thymol addition on the antimicrobial activity for the composite with and without NC. Jackfruit skin was dried and grinded in order to obtain jackfruit skin powder (JSP) which then undergoes bleaching process. The JSP was then mixed with polylactic acid (PLA) with 10% loading of thymol and 3% and 5% loading of nanocellulose (NC) by using internal mixer, the loading of the HSP was fixed at 30% based on optimum loading discovered by previous study. The PLA/JSP composites ware then prepared and tested. The testing that had been carried out including mechanical properties using Instron machine, thermal properties using Thermogravimetric Analysis (TGA) and antimicrobial activity by conducting zone of inhibition against S. aureus. It was found that the incorporation of NC into PLA/JSP composites increase the tensile strength with slight reduction at 5% loading of NC. The attempt to incorporate 3-5% NC in the PLA/JSP composites resulted no significant change on the strength due to agglomeration of NC. The tensile modulus increased as the loading of NC increased while the elongation at break decreased. The addition of thymol into the PLA, PLA/JSP and PLA/JSP/NC matrix reduced the tensile strength and tensile modulus while increased the elongation at break. The incorporation of NC also increased the thermal stability of the PLA/JSP composites. However, the addition of thymol into the composites lowered the degradation temperature of the composites. Antimicrobial test demonstrated the capability of the PLA/JSP containing thymol with 5% loading of NC inhibit the growth of S.aureus.

Item Type:	Project Paper
Faculty:	Faculty of Engineering
Depositing User:	Ms. AZLINA ZAINAL ABIDIN
Date Deposited:	21 Nov 2024 06:04
Last Modified:	21 Nov 2024 06:04
URI:	http://psaspb.upm.edu.my/id/eprint/2224

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