正硅酸乙酯
三乙氧基硅烷
溴化铵
材料科学
介孔二氧化硅
化学工程
表面改性
聚丙烯酸
抗菌活性
介孔材料
复合数
分散剂
聚合物
有机化学
复合材料
纳米技术
化学
肺表面活性物质
色散(光学)
催化作用
细菌
工程类
物理
光学
生物
遗传学
作者
Ximing Zhong,Fan Gao,Hongjie Wei,Hongjun Zhou,Hongjun Zhou
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2021-10-29
卷期号:33 (3): 035706-035706
被引量:19
标识
DOI:10.1088/1361-6528/ac2fe2
摘要
In this work, a novel composite carrier system for loading essential oils was developed by using tetraethyl orthosilicate (TEOS) and (3-aminopropyl) triethoxysilane (APTES) as silica precursors and cetyl trimethyl ammonium bromide (CTAB) as a template, and the resultant aminated mesoporous silica was further chemically modified by polyacrylic acid (PAA). The obtained composite carriers exhibited a high loading capability toward tea tree oil (TTO), and they also significantly improved the release behavior of TTO due to the steric hindrance of silica mesopore and the polymer restriction. Besides, it was found that the release behavior followed the First-Order kinetic model, revealing that the release of TTO was driven by the concentration gradient. In addition, these composite carriers with essential oil-loaded demonstrated remarkable antibacterial performance againstE. coliandS. aureus, and they could retain antibacterial performance even after 50 d. Moreover, the antibacterial mechanism was also elucidated with the assistance of nucleic acid and conductivity measurements. Therefore, this work provides a facile and environmentally friendly approach to preparing effective composite carriers for improving the sustained release of essential oils, and the long-term antibacterial performance of these essential oil-loaded composite carriers makes them tremendously potential for practical applications.
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