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Open AccessArticle

Antibacterial and Antifungal Properties of Composite Polyethylene Materials Reinforced with Neem and Turmeric

1
Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
2
Department of Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine Kamigyo-ku, 465 Kajii-cho, Kawaramachi Dori, Kyoto 602-0841, Japan
3
Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
4
Department of Biomolecular Engineering, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan
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Graduate School of Science and Technology, Kyoto Institute of Technology (KIT), Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Mechanical and Production Engineering Department, Faculty of Engineering, University of Mauritius, Reduit 80837, Mauritius
7
The Center for Advanced Medical Engineering and Informatics, Osaka University, Yamadaoka, Suita, Osaka 565-0871, Japan
8
Department of Orthopedic Surgery, Tokyo Medical University, Tokyo 105-8461, Japan
*
Author to whom correspondence should be addressed.
Antibiotics 2020, 9(12), 857; https://doi.org/10.3390/antibiotics9120857
Received: 2 November 2020 / Revised: 19 November 2020 / Accepted: 26 November 2020 / Published: 30 November 2020
With the increased scientific interest in green technologies, many researches have been focused on the production of polymeric composites containing naturally occurring reinforcing particles. Apart from increasing mechanical properties, these additions can have a wide range of interesting effects, such as increasing the resistance to bacterial and fungal colonization. In this work, different amounts of two different natural products, namely neem and turmeric, were added to polyethylene to act as a natural antibacterial and antifungal product for food packaging applications. Microscopic and spectroscopic characterization showed that fractions of up to 5% of these products could be dispersed into low-molecular weight polyethylene, while higher amounts could not be properly dispersed and resulted in an inhomogeneous, fragile composite. In vitro testing conducted with Escherichia coli, Staphylococcus aureus, and Candida albicans showed a reduced proliferation of pathogens when compared to the polyethylene references. In particular, turmeric resulted in being more effective against E. coli when compared to neem, while they had similar performances against S. aureus. Against C. albicans, only neem was able to show a good antifungal behavior, at high concentrations. Tensile testing showed that the addition of reinforcing particles reduced the mechanical properties of polyethylene, and in the case of turmeric, it was further reduced by UV irradiation. View Full-Text
Keywords: turmeric; neem; antibacterial; antifungal; polyethylene turmeric; neem; antibacterial; antifungal; polyethylene
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MDPI and ACS Style

Sunthar, T.P.M.; Marin, E.; Boschetto, F.; Zanocco, M.; Sunahara, H.; Ramful, R.; Kamei, K.; Zhu, W.; Pezzotti, G. Antibacterial and Antifungal Properties of Composite Polyethylene Materials Reinforced with Neem and Turmeric. Antibiotics 2020, 9, 857. https://doi.org/10.3390/antibiotics9120857

AMA Style

Sunthar TPM, Marin E, Boschetto F, Zanocco M, Sunahara H, Ramful R, Kamei K, Zhu W, Pezzotti G. Antibacterial and Antifungal Properties of Composite Polyethylene Materials Reinforced with Neem and Turmeric. Antibiotics. 2020; 9(12):857. https://doi.org/10.3390/antibiotics9120857

Chicago/Turabian Style

Sunthar, Thefye P.M.; Marin, Elia; Boschetto, Francesco; Zanocco, Matteo; Sunahara, Hirofumi; Ramful, Raviduth; Kamei, Kaeko; Zhu, Wenliang; Pezzotti, Giuseppe. 2020. "Antibacterial and Antifungal Properties of Composite Polyethylene Materials Reinforced with Neem and Turmeric" Antibiotics 9, no. 12: 857. https://doi.org/10.3390/antibiotics9120857

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