应用化学2013，Vol.30Issue(1)：32-37,6.DOI:10.3724/SP.J.1095.2013.20037
合成聚对苯二甲酸丙二醇酯负载型催化剂钛酸四丁酯/纳米二氧化硅的制备
Preparation of n-Butyl Titantate/Nano Silicon Oxide Catalyst for Synthesis of Poly (trimethylene terephthalate)
摘要
Abstract
Nano-SiO2 was modified with titanate coupling agent ( TMC-201 ) under ultrasonic dispersion.n-Butyl titanate[Ti( OC4H9)4]/nano-SiO2 catalysts were successfully prepared by loading Ti(OC4H9)4 on the surface of modified nano-SiO2 particles via impregnation method.The impacts of titanate coupling agent,temperature and time on the surface modification of hydrophilic nano-SiO2 were studied.The impacts of Ti(OC4H9)4 content,supported temperature and supported time loading on modified nano-SiO2 particles were investigated.The results indicated that the titanate coupling agent was fully grafted on nano-SiO2 when TMC-201 content was 35% of nano-SiO2,modification temperature was 90 Tl,modification time was 3.5 h.The Ti ( OC4 H9 ) 4/nano-SiO2 catalysts were the best when the using of Ti ( OC4 H9 ) 4 was 50% of modified nano-SiO2,supported time was 48 h at room temperature.The modified nano-SiO2 and Ti( OC4H9 )4/nano-SiO2 catalysts were characterized by ICP-AES and FESEM.Compared with the Ti(OC4H9)4 catalysts,the Ti(OC4H9)4/ nano-SiO2 catalysts exhibited excellent catalytic activity.The esterification time in the synthesis of the poly (trimethylene terephthalate)( PTT) with Ti ( OC4 H9 ) 4/nano-SiO2 catalysts was 177 min.The viscosity was improved to 1.05 after 2 h polycondensation.关键词
纳米二氧化硅/钛酸四丁酯/纳米二氧化硅负载型催化剂/浸渍法/聚对苯二甲酸丙二醇酯Key words
nano silicon oxide/re-butyl titanate/nano silicon oxide catalyst/impregnation method/poly (trimethylene terephthalate)分类
化学化工引用本文复制引用
叶冲,姜敏,张强,刘茜,周光远..合成聚对苯二甲酸丙二醇酯负载型催化剂钛酸四丁酯/纳米二氧化硅的制备[J].应用化学,2013,30(1):32-37,6.基金项目
国家自然科学基金委员会青年科学基金(51103152)资助项目 （51103152）
