Preparation and properties of calcium oxide and calcium peroxide from eggshell waste for enhanced antimicrobial activity

被引:1
|
作者
Heo, Won [1 ]
Shin, Hojun [1 ]
Ansari, Jamilur R. [1 ]
Park, Kitae [1 ]
Seo, Jongchul [1 ]
机构
[1] Yonsei Univ, Dept Packaging & Logist, 1 Yonseidae gil, Wonju 26493, Gangwon, South Korea
来源
MATERIALS TODAY COMMUNICATIONS | 2024年 / 41卷
基金
新加坡国家研究基金会;
关键词
Eggshells; Calcium oxide; Calcium peroxide; Green synthesis; Antimicrobial agent; HYDROGEN-PEROXIDE; NANOPARTICLES; OXYGEN; CARBONATION; MECHANISMS; PRODUCTS; GROWTH; CAO;
D O I
10.1016/j.mtcomm.2024.110531
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Calcium peroxide (CaO2), which releases hydrogen peroxide (H2O2) upon contact with water, has garnered attention as a potential alternative to liquid H2O2. Researchers have explored various methods to enhance the production of CaO2 with reduced environmental impact. This study focuses on the preparation of two potent antimicrobial agents, calcined calcium oxide (C-CaO) and synthesized calcium peroxide (S-CaO2) from eggshell waste. These agents were then incorporated into ethylene vinyl alcohol (EVOH) composite films for antimicrobial packaging. The synthesized CaO and CaO2 were analyzed using Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Thermogravimetric analysis (TGA) and Scanning electron microscopy (SEM). The results confirmed the successful synthesis of high-purity CaO and CaO2 from eggshell waste. Compared to CaO (a well-known antimicrobial agent), CaO2 exhibited approximately 1.6-2 times higher antimicrobial activity, which is attributed to its release of H2O2. EVOH films containing 3 % of CaO2 demonstrated significant microbial growth deactivation, reaching 99.99 % and 97.24 % for gram-negative and gram-positive bacteria, while EVOH films containing 3 % of CaO exhibited relatively low deactivation ability of 79.01 and 48.82 %, respectively. This study underscores the potential of eggshell waste as a valuable resource for producing high-value materials. Moreover, CaO2 emerges as an effective antimicrobial agent, particularly in antimicrobial packaging applications, showcasing its versatility across various sectors.
引用
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页数:8
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