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<p>Functional coatings of hydrophobic starch matrix integrated with silver zeolite (AgZ), zinc oxide nanoparticles (ZnONPs), and titanium dioxide nanoparticles (TiO<sub>2</sub>NPs) were prepared to develop antimicrobial activity of packaging paper. The impact of the types and concentrations of these antimicrobial agents on the physical, mechanical, water resistance, and antimicrobial properties of the coated paper was thoroughly examined. The minimum inhibitory concentration (MIC)&#xa0;of AgZ, ZnONPs against both Gram-negative (<i>Escherichia</i> <i>coli</i> and <i>Pseudomonas</i> <i>aeruginosa</i>) and Gram-positive (<i>Streptococcus</i> <i>aureus</i> and <i>Bacillus</i> <i>cereus</i>) bacteria was found to be 50&#xa0;ppm. However, the MIC of TiO<sub>2</sub>NPs was&#xa0;50&#xa0;ppm against <i>P.</i> <i>aeruginosa</i> and <i>S.</i> <i>aureus</i>. The coating effectively enhanced mechanical strength properties by filling surface voids and consequently improving their mechanical properties without compromising the moisture-barrier properties of the paper. The coatings matrix containing HS/AgZ(250) demonstrated strong inhibition against both Gram-negative (<i>E.</i> <i>coli</i> and <i>P.</i> <i>aeruginosa</i>) and Gram-positive (<i>S.</i> <i>aureus</i> and <i>B.</i> <i>cereus</i>) bacteria. Furthermore, antifungal tests confirmed that coatings with AgZ, ZnONPs, and TiO<sub>2</sub>NPs inhibited the growth of <i>Colletotrichum</i> <i>gloeosporioides</i>. Among the antimicrobial agents in this study, silver ions exhibited superior efficacy compared to zinc oxide and titanium dioxide. Based on the results in this work HS/AgZ(250) and HS/ZnONPs(50,000) coated paper would have the&#xa0;potential to be used as a&#xa0;functional product where microbial stability is required for various applications.</p>

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Integrating bioactive mineral micro/nanoparticles into starch-based coatings for packaging paper with dual antibacterial and antifungal functionalization

  • 期刊论文

  • 发表日期：

    2026年3月25日

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  • Kapphapaphim Wanitpinyo,
  • Kawinthida Nanta,
  • Korawit Chitbanyong,
  • Piyawan Yimlamai,
  • Piyangkun Lueangjaroenkit,
  • Sawitree Pisutpiched,
  • Somwang Khantayanuwong,
  • Buapan Puangsin

摘要

Functional coatings of hydrophobic starch matrix integrated with silver zeolite (AgZ), zinc oxide nanoparticles (ZnONPs), and titanium dioxide nanoparticles (TiO2NPs) were prepared to develop antimicrobial activity of packaging paper. The impact of the types and concentrations of these antimicrobial agents on the physical, mechanical, water resistance, and antimicrobial properties of the coated paper was thoroughly examined. The minimum inhibitory concentration (MIC) of AgZ, ZnONPs against both Gram-negative (Escherichia coli and Pseudomonas aeruginosa) and Gram-positive (Streptococcus aureus and Bacillus cereus) bacteria was found to be 50 ppm. However, the MIC of TiO2NPs was 50 ppm against P. aeruginosa and S. aureus. The coating effectively enhanced mechanical strength properties by filling surface voids and consequently improving their mechanical properties without compromising the moisture-barrier properties of the paper. The coatings matrix containing HS/AgZ(250) demonstrated strong inhibition against both Gram-negative (E. coli and P. aeruginosa) and Gram-positive (S. aureus and B. cereus) bacteria. Furthermore, antifungal tests confirmed that coatings with AgZ, ZnONPs, and TiO2NPs inhibited the growth of Colletotrichum gloeosporioides. Among the antimicrobial agents in this study, silver ions exhibited superior efficacy compared to zinc oxide and titanium dioxide. Based on the results in this work HS/AgZ(250) and HS/ZnONPs(50,000) coated paper would have the potential to be used as a functional product where microbial stability is required for various applications.