PDF(Pubmed)
Abstract：
The growing concerns regarding foodborne illnesses related to fresh produce accentuate the necessity for innovative material solutions, particularly on surfaces that come into close contact with foods. This study introduces a sustainable, efficient, and removable antimicrobial and antifouling coating ideally suited for hydrophobic food-contact surfaces such as low-density polyethylene (LDPE). Developed through a crosslinking reaction involving tannic acid, gelatin, and soy protein hydrolysate, these coatings exhibit proper stability in aqueous washing solutions and effectively combat bacterial contamination and prevent biofilm formation. The unique surface architecture promotes the formation of halamine structures, enhancing antimicrobial efficacy with a rapid contact killing effect and reducing microbial contamination by up to 5 log10 cfu·cm-2 against both Escherichia coli (Gram-negative) and Listeria innocua (Gram-positive). Notably, the coatings are designed for at least five recharging cycles under mild conditions (pH6, 20 ppm free active chlorine) and can be easily removed with hot water or steam to refresh the depositions. This removal process not only conveniently aligns with existing sanitation protocols in the fresh produce industry but also facilitates the complete eradication of potential developed biofilms, outperforming uncoated LDPE coupons. Overall, these coatings represent sustainable, cost-effective, and practical advancements in food safety and are promising candidates for widespread adoption in food processing environments.
摘要：
对与新鲜农产品相关的食源性疾病的日益关注强调了创新材料解决方案的必要性，特别是在与食物紧密接触的表面上。这项研究引入了一种可持续的，高效,和可去除的抗微生物和防污涂层非常适合于疏水性食品接触表面，如低密度聚乙烯（LDPE）。通过涉及单宁酸的交联反应开发，明胶,和大豆蛋白水解物，这些涂层在水性洗涤溶液中表现出适当的稳定性,并且有效地对抗细菌污染并防止生物膜形成。独特的表面结构促进卤胺结构的形成，对大肠杆菌（革兰氏阴性）和无害李斯特菌（革兰氏阳性），可通过快速接触杀灭效果增强抗菌功效，并将微生物污染减少多达5log10cfu·cm-2。值得注意的是,涂层被设计用于在温和条件(pH6,20ppm游离活性氯)下的至少五个再充电循环,并且可以用热水或蒸汽容易地去除以刷新沉积。这种去除过程不仅方便地与新鲜农产品行业中现有的卫生协议保持一致，而且还有助于彻底根除潜在的已开发生物膜。表现优于未涂覆的LDPE试样。总的来说,这些涂料代表了可持续的，成本效益高,和食品安全的实际进步，是在食品加工环境中广泛采用的有希望的候选人。
