埃洛石纳米管负载香芹酚及其性能的研究

Research on carvacrol essential oil loaded in halloysite nanotubes and the performance

为提高食品包装系统的抗菌效率,利用真空负压法将挥发性的香芹酚封装在埃洛石纳米管中,制备香芹酚-埃洛石纳米管包合物。采用FTIR、TEM、TG、UV光谱仪、DSC分析包合物的成份、微观结构形貌、载药率和热稳定性,琼脂平板计数法研究包合物的抗菌性能。结果表明:包合物中香芹酚最大载药量为20%;包合物含量为8%(w/w)的玉米醇溶蛋白薄膜对大肠杆菌和金黄色葡萄球菌有明显抗菌效果,最大抑菌率分别为85%和59%;负载后香芹酚的热稳定性大幅提升,而且具有一定的缓释性,40℃条件下存储25 d后,包合物中香芹酚释放率仅为33.8%。制备的香芹酚-埃洛石纳米管包合物应用于食品包装材料中,能极大延长食品的货架寿命。

In order to improve the antibacterial efficiency of food packaging system,the volatile carvacrol essential oil was loaded into halloysite nanotubes by the vacuum negative pressure method to obtain the carvacrol-halloysite nanotube compounds.FTIR,TEM,TGA,UV Spectrophotometer and DSC were used to analyze the composition,microstructure,loading ratio and thermal stability of the compounds.At the same time,the antibacterial properties of the compounds were studied by agar plate counting method.The results show that the highest loading ratio of carvacrol is 20%;the zein film containing a mass ratio of 8%CA-HNTs has obvious antibacterial efficacy against Escherichia coli and Staphylococcus aureus,and the maximum inhibition efficiency is 85%for Escherichia coli and 59%for Staphylococcus aureus;The prepared CA-HNTs have a significant increase in thermal stability and certain slow release.The CA release ratio is only 33.8%at 40℃after 25 days of storage.The shelf life of food can be greatly extended when the CA-HNTs obtained are applied in the food packaging materials.