利用溶胶-凝胶技术制备钛胶HPLC整体柱及其表征  

Synthesis of Titania Monolith for HPLC by Sol-gel Technology and Its Characterization

作　　者：钱瑞[1] 李荣[1] 姜子涛[1] 谭津[1] 

机构地区：[1]天津商业大学生物技术与食品科学学院,天津市食品生物技术重点实验室,天津300134

出　　处：《材料导报》2013年第8期85-90,共6页Materials Reports

基　　金：国家自然科学基金(20875069);天津自然科学基金

摘　　要：以钛酸四异丙酯为钛源,聚氧化乙烯(PEO)为结构改良剂,采用无需模板的溶胶-凝胶技术制得了具有高比表面积、大孔-介孔双连接结构的钛胶整体柱。研究了PEO、冰乙酸、水以及凝胶化时间对钛胶整体柱形貌和比表面积的影响。采用扫描电子显微镜(SEM)和比表面分析仪对所合成的钛胶整体柱进行了表征。结果表明,经过350℃煅烧后得到钛胶整体柱:孔骨架尺寸为1μm、较窄的孔径分布(平均孔径为10.5nm)、BET比表面积101.3m2/g、Langmuir比表面积143.3m2/g、孔体积0.21mL/g,并将其成功应用于HPLC对羧酸类化合物的分析。The macro-mesoporosity bimodal titania monoliths with high surface area was synthesized via a tem- plate-free sol-gel route using titanium isopropoxide as titania source and poly （ethylene oxide） （PEO） as an improver of the pore structure and specific surface area. The effects of some factors, such as PEO, acetic acid, H2 O, and gela- tion time on the shape and specific surface area of the titania monoliths were determined. Titania monoliths were cha- racterized by SEM and BET measurements. The results show that titania monoliths with framework size of 1 μm, a narrow pore size distribution and mean pore size of 10. 5 nm, BET surface area of 101.3 m2/g, Langmuir surface area of 143.3 m2/g, and a narrow pore size distribution was obtained after 350 ℃ calcination. Using bare titania monolith, chromatographic separation of carboxylate compounds was successfully demonstrated, which exhibited the excelient property of chromatography separation.

关 键 词：钛胶整体柱 溶胶-凝胶法 高效液相色谱柱 大孔-介孔结构 

分 类 号：TQ031.2[化学工程]