高压均质辅助构筑CTAB改性植物精油/凹凸棒石复合抗菌材料  

High pressure homogenization assisted fabrication of CTAB modified plant essential oil/palygorskite antibacterial composites

作　　者：惠爱平 杨芳芳 康玉茹[1,2] 王爱勤 HUI Aiping;YANG Fangfang;KANG Yuru;WANG Aiqin(Key Laboratory of Clay Mineral Applied Research of Gansu Province,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,Gansu,China;Center of Xuyi Palygorskite Applied Technology,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Xuyi 211700,Jiangsu,China)

机构地区：[1]中国科学院兰州化学物理研究所,甘肃省黏土矿物应用研究重点实验室,甘肃兰州730000 [2]中国科学院兰州化学物理研究所盱眙凹土应用技术研发中心,江苏盱眙211700

出　　处：《精细化工》2021年第10期2019-2024,2033,共7页Fine Chemicals

基　　金：中国科学院STS区域重点项目(KFJ-STS-QYZX-086);甘肃省自然科学基金重大项目(18JR4RA001);江苏省科技厅重点研发计划(BE2019071)。

摘　　要：采用高压均质辅助构筑十六烷基三甲基溴化铵(CTAB)改性植物精油/凹凸棒石复合抗菌材料,对其进行了FTIR、XRD、SEM、Zeta电位和TG测试表征。FTIR分析表明,植物精油负载于凹凸棒石并成功实现表面改性。随CTAB用量增加,复合抗菌材料的Zeta电位由负变正。最小抑菌浓度(MIC)测试结果表明,复合材料的抗菌性能随CTAB用量的增加而增强,CTAB改性明显提升了复合材料对革兰氏阳性菌的抗菌活性。当CTAB用量为2.5%(以凹凸棒石质量为基准,下同)时,CTAB改性香芹酚/凹凸棒石复合材料和肉桂醛/凹凸棒石复合材料对金黄色葡萄球菌的MIC值由未改性的1 g/L分别减小至0.125 g/L和0.5 g/L。Cetyltrimethylammonium bromide(CTAB) modified plant essential oil/palygorskite composites were assisted fabricated by high pressure homogenization and characterized by FTIR, XRD, SEM, Zeta potential and TG. FTIR results displayed that plant essential oil was loaded on palygorskite and the surface was successfully modified. Zeta potential of the composites ranged from negative to positive with the increase of CTAB dosage. Minimum inhibitory concentration(MIC) results indicated that antibacterial activities of the composites were enhanced with the increase of CTAB content, and CTAB modification significantly improved the antibacterial activity of the composites against Gram-positive bacteria. When the content of CTAB was 2.5%(based on the mass of palygorskite, the same below), the MIC values of CTAB modified carvacrol/palygorskite composite and cinnamaldehyde/palygorskite composite against S. aureus decreased from unmodified composite 1 g/L to 0.125 g/L and 0.5 g/L, respectively.

关 键 词：凹凸棒石 CTAB 植物精油 高压均质 抗菌性能 功能材料 

分 类 号：TQ430.5[化学工程] TB34[一般工业技术—材料科学与工程]