离子液体/磷酸锆抗菌材料的制备及耐热性研究  

Formation and Thermal Stabilities Research of Ionic Liquids/α-ZrP Antibacterial Materials

作　　者：李丹[1] 陈运法[1] 

机构地区：[1]中国科学院过程工程研究所,北京100190

出　　处：《无机材料学报》2011年第11期1193-1198,共6页Journal of Inorganic Materials

基　　金：国家高技术研究发展计划(2007AA061401);863 Program(2007AA061401)

摘　　要：以α-磷酸锆(分子式:Zr(HPO4)2.H2O,以下简称α-ZrP)为载体,三种季铵型离子液体:溴化十六烷基三甲基咪唑(C16MIMBr)、氯化十六烷基二甲基苄基铵(C16HDBACCl)和氯化十六烷基三甲基铵(C16CTACCl)被引入α-ZrP层间,制备得到三种离子液体/α-磷酸锆(IL-ZrP)复合抗菌材料.通过X射线衍射法(XRD)、红外光谱分析(FTIR)、热重—红外联用分析(TG-FTIR)对材料的结构、组成和热稳定性进行表征.XRD结果表明:相对于α-ZrP,三种复合抗菌材料的层间距明显增大,这证明离子液体已经成功地嵌入到α-ZrP的层间.TG-FTIR实验显示三种离子液体在复合抗菌材料中分别占53.11wt%、50.65wt%和51.25wt%.三种纯离子液体的热分解起始温度分别为174℃、198℃和219℃,而离子液体/α-ZrP(IL-ZrP)复合抗菌材料中所含的离子液体的热分解起始温度为219℃、225℃和263℃,这表明α-ZrP能有效提高离子液体的耐热性.抗菌性能检测结果表明:在三种复合材料中,C16MIMBr-ZrP具有较好的抗菌效果(在24 h内,其对大肠杆菌、金色葡萄球菌的最小抑菌浓度均小于19 mg/L).Three different ionic liquids/α-zirconium phosphonates（IL-ZrP） composites antibacterial materials were prepared by introducing quarternary ammonium type ionic liquids（1-hexadecyl-3-methylimidazolium bromide,C16MIMBr;hexadecyl dimethyl benzyl ammonium chloride,C16HDBACCl;hexadecyl trimethyl ammonium chlo-ride,C16CTACCl） into the interlayer of α-zirconium phosphonates（α-ZrP）.The structure,components and thermal stability of composites was characterized by X-ray diffraction（XRD）,Fourier transform infrared spectroscope（FTIR）,Thermogravimetric-Fourier transform infrared spectroscope analysis（TG-FTIR）.XRD patterns show that the interlayer spacing of IL-ZrP are larger than the original α-ZrP.It represents that the ionic liquids are intercalated into the layer of α-ZrP.TG-FTIR shows that the mass fraction of C16MIMBr,C16HDBACCl and C16CTACCl in three IL-ZrP are 53.11wt%,50.65wt% and 51.25wt%,respectively.The onset temperatures of the decomposition for C16MIMBr,C16HDBACCl and C16CTACCl are 174 ℃,198 ℃ and 219 ℃,while the onset temperatures of the decomposition for C16MIMBr-ZrP,C16HDBACCl-ZrP and C16CTACCl-ZrP are 219 ℃,225 ℃ and 263 ℃.The ex-isting of α-ZrP improves the thermal stability of ionic liquids.Among the three IL-ZrP,the C16MIMBr-ZrP has excellent antibacterial activity,（i.e.within 24 h,the minimal inhibitory concentration of C16MIMBr pillared α-zirconium phosphonates against S.aureus and E.coli is less than 19 mg/L）.

关 键 词：离子液体 α-ZrP 有机-无机复合 抗菌性能 

分 类 号：TB332[一般工业技术—材料科学与工程]