A\} new highly ordered mesostructured silica(possible space group \%Fm3m\%) was synthesized by \{using\} tri\|headgroup quaternary ammonium surfactant \{CH\-3(CH\-2)\-\{17\}N\++(CH\-3)\-2CH\-2CH\-2N\++(CH\-3)\-2CH\-2C...A\} new highly ordered mesostructured silica(possible space group \%Fm3m\%) was synthesized by \{using\} tri\|headgroup quaternary ammonium surfactant \{CH\-3(CH\-2)\-\{17\}N\++(CH\-3)\-2CH\-2CH\-2N\++(CH\-3)\-2CH\-2CH\-2\}CH\-2N\++(CH\-3)\-3\53Br\+-(C\-\{18\|2\|3\|1\}) under a basic condition. The cubic mesoporous silica product has an \{average\} pore size of 2.9 nm, a large BET specific surface area of 991 m\+2/g and a large pore volume of \{0.98 cm\+3/g\}.展开更多
以烯丙基聚醚、氯化亚砜和十四烷基二甲基叔胺为原料合成一种新型的可聚合季铵盐表面活性剂,并用该表面活性剂对纳米SiO2粉体进行表面改性,采用傅里叶变换红外光谱仪(FT-IR)、核磁共振氢谱仪(1H-NMR)、界面张力仪、热分析仪、粒度分析...以烯丙基聚醚、氯化亚砜和十四烷基二甲基叔胺为原料合成一种新型的可聚合季铵盐表面活性剂,并用该表面活性剂对纳米SiO2粉体进行表面改性,采用傅里叶变换红外光谱仪(FT-IR)、核磁共振氢谱仪(1H-NMR)、界面张力仪、热分析仪、粒度分析仪和紫外-可见分光光度计对样品进行表征。结果表明:可聚合季铵盐表面活性剂的临界胶束浓度为4.47×10-3mol/L,对应的表面张力为38.12 m N/m,改性纳米SiO2粉体的最大接枝量为27.0mmol/g,且在甲醇、乙酸乙酯、甲苯、正己烷等溶剂中都具有较好的分散稳定性。展开更多
文摘A\} new highly ordered mesostructured silica(possible space group \%Fm3m\%) was synthesized by \{using\} tri\|headgroup quaternary ammonium surfactant \{CH\-3(CH\-2)\-\{17\}N\++(CH\-3)\-2CH\-2CH\-2N\++(CH\-3)\-2CH\-2CH\-2\}CH\-2N\++(CH\-3)\-3\53Br\+-(C\-\{18\|2\|3\|1\}) under a basic condition. The cubic mesoporous silica product has an \{average\} pore size of 2.9 nm, a large BET specific surface area of 991 m\+2/g and a large pore volume of \{0.98 cm\+3/g\}.
文摘以烯丙基聚醚、氯化亚砜和十四烷基二甲基叔胺为原料合成一种新型的可聚合季铵盐表面活性剂,并用该表面活性剂对纳米SiO2粉体进行表面改性,采用傅里叶变换红外光谱仪(FT-IR)、核磁共振氢谱仪(1H-NMR)、界面张力仪、热分析仪、粒度分析仪和紫外-可见分光光度计对样品进行表征。结果表明:可聚合季铵盐表面活性剂的临界胶束浓度为4.47×10-3mol/L,对应的表面张力为38.12 m N/m,改性纳米SiO2粉体的最大接枝量为27.0mmol/g,且在甲醇、乙酸乙酯、甲苯、正己烷等溶剂中都具有较好的分散稳定性。
