摘要
采用后合成方法,将γ-巯基丙基三乙氧基硅烷嫁接到黏土表面,获得含磺酸有机功能团的黏土固体酸催化剂。经XRD、N2吸附-脱附、FTIR、吡啶吸附和酸量滴定等物性结构表征及催化四氢呋喃聚合的反应活性评价,结果表明,改性后的黏土保持了原有黏土介孔结构,孔径分布集中在3～4.3 nm,酸量增加了35%,在催化四氢呋喃聚合反应中显现出较高的催化活性,在反应温度为35℃、反应时间为8 h的条件下,聚合产物收率达30%,得到数均分子量为2000左右、可用作氨纶生产原料的聚合物。
A kind of solid acid catalyst containing alkyl sulfonic acid group was prepared by post-synthesis grafting of 3-mercaptopropyltriethoxysilane （MPTES） to the surface of acid-modified clay. The clay samples were characterized by means of XRD, N2 adsorption-desorption, FTIR, IR analysis of adsorbed pyridine and acid-base titration. The results showed that the hybrid material maintained the mesoporous structure with pore size mainly distributed in 3-4.3nm, and the acid amount increased by 35%. In the polymerization of tetrahydrofuran, the organic-inorganic hybrid clay catalyst showed good catalytic performance. When the temperature was 35%and the reaction time was 8 h, the vield of oolvmer reached 30℃ and the number-average molecular weight was about 2000.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2009年第7期1673-1679,共7页
CIESC Journal
基金
山西省高校科技开发项目(2007108)
山西省科技攻关计划项目(20090321059)
关键词
有机-无机杂化
黏土
四氢呋喃
聚合
organic-inorganic hybrid
clay
tetrahydrofuran
polymerization
