3-氯丙基三甲氧基硅烷协同盐酸改性纳米二氧化硅用作饮用水浊度标准物质  

Nano silica dioxide modified by 3-chloropropyltrimethoxysilane collaboratively with hydrochloric acid as standard of water turbidity

作　　者：官杰 周加彦 高翠玲 贺祥珂 柳永杰 刘丞 GUAN Jie;ZHOU Jia-yan;GAO Cui-ling;HE Xiang-ke;LIU Yong-jie;LIU Cheng(Shandong Institute for Product Quality Inspection,Jinan 250102,China)

机构地区：[1]山东省产品质量检验研究院,山东济南250102

出　　处：《化学研究与应用》2021年第11期2118-2124,共7页Chemical Research and Application

基　　金：国家重点研发计划项目(2017YFF0209900)资助。

摘　　要：为选取一种较高稳定性的浊度标准物质,以3-氯丙基三甲氧基硅烷为改性剂在盐酸协同作用下对适当粒径纳米SiO_(2)粉末进行改性,红外光谱显示3-氯丙基三甲氧基硅烷成功修饰到纳米SiO_(2)表面,通过SEM进行表征,疏水基团的引入降低了纳米SiO_(2)表面羟基作用力,改善了纳米SiO_(2)在水溶液中的分散性。比较了改性纳米SiO_(2)溶液与福尔马肼标准溶液在粒径稳定性、静置稳定性等方面的差异,研究了改性纳米SiO_(2)水溶液的质量浓度(mg·L^(-1))与浑浊度(NTU)的对应关系及其稀释特性。结果显示,改性SiO_(2)溶液浓度与浑浊度具有较好的线性关系和稀释特性,且具有良好的静置稳定性,可见改性纳米SiO_(2)溶液可用作饮用水水质浊度测定的标准物质。In order to find a kind of highly stable turbidity standard substance,the nano silica dioxide(SiO_(2))powder was modified by 3-chloropropyltrimethoxysilane with hydrochloric acid.Infrared spectrogram showed that the nano SiO_(2)powder was successfully modified by 3-chloropropyltrimethoxysilane.The hydroxyl force on surface of the nano SiO_(2)powder was reduced due to the introduction of hydrophobic groups.The size and static stability between the modified nano SiO_(2)solution and Formazin standard solution were compared.The correlation between the mass concentration of modified nano SiO_(2)solution(mg·L^(-1))and turbidity(NTU)was studied,and also the dilution relationship of modified nano SiO_(2)solution.Results showed that the mass concentration of the modified nano SiO_(2)solution has linear relationship with the turbidity.The dilution of the modified nano SiO_(2)solution also has high linear relationship.Compared with the Formazin standard solution,the modified nano SiO_(2)solution is more stable in static state.It is concluded that the modified nano SiO_(2)solution could be used as a kind of turbidity standard substance.

关 键 词：浑浊度 标准物质 福尔马肼 二氧化硅 改性 

分 类 号：O657.39[理学—分析化学]