Effect of surface acidity and pore size of Al-substituted plugs-containing SBA-15 and MCM-41 silicas on the polymerization of THF
Effect of surface acidity and pore size of Al-substituted plugs-containing SBA-15 and MCM-41 silicas on the polymerization of THF
复制标题
含Al取代塞SBA-15和MCM-41二氧化硅表面酸度和孔径对THF聚合的影响
DOI：
10.1016/j.cclet.2010.09.007
复制
发表时间：
2011
影响因子：
9.1
通讯作者：
贾志奇
中科院分区：
文献类型：
--
作者：
赵永祥;贾志奇
我们在这里报道了al取代的六方介孔硅（含al掺杂的plug -containing SBA-15和al掺杂的MCM-41）表面酸度和孔径对THF聚合的同时影响。将异丙醇铝引入表面活性剂和硅质前驱体的反应混合物中，直接合成了这些材料。含al掺杂的SBA-15（表示PAS）样品不仅具有典型的两步解吸等温线，这意味着PAS材料在其介孔通道中产生了堵塞，而且比al掺杂的MCM-41（表示ACM）具有更大的孔径和更厚的壁，这意味着从工业角度来看，PAS在涉及大分子（如THF聚合物）的催化反应中具有很大的优势。为了研究具有中酸性位点的PAS和ACM的催化活性，进行了乙酸酐存在下四氢呋喃的聚合。结果表明，PAS对THF具有良好的聚合性能。这种结果可能与孔隙大、酸性位点适中有关。
We reported here the simultaneous influence of surface acidity and pore size of Al-substituted hexagonal mesoporous silicas (Al-doped plugs-containing SBA-15 and Al-doped MCM-41) on polymerization of THF. These materials were directly synthesized by introduced aluminum isopropoxide into reaction mixture including surfactant and siliceous precursor. Al-doped plugs-containing SBA-15 (denotes as PAS) samples not only possess typical two-step desorption isotherms, which implied PAS materials generated plugs in their mesochannel, but also exhibit larger pore size and thicker wall than that of Al-doped MCM-41 (denotes as ACM), which implied PAS would have a great advantage on catalytic reaction involving large molecular (e.g. polymer of THF) in industrial point of view. To investigate catalytic activity of PAS and ACM with moderate acidic sites the polymerization of THF in the presence of acetic anhydride was carried out. The results showed PAS exhibiting good performance on polymerization of THF. Such result could be related to the large pore size and moderate acidic sites.
登录
查看更多内容
影响因子：
1.7
作者：
Jun Kang;Yang-Kyoo Han
通讯作者：
Jun Kang;Yang-Kyoo Han
载体孔径对新型Cs2.5H0.5PW12O40/SiO2催化剂四氢呋喃开环聚合的影响
影响因子：
9.1
作者：
Zhou, Fu Dong;Luo, Shi Zhong;Chu, Wei;Liao, Xue Mei;Li, Yang
通讯作者：
Li, Yang
影响因子：
2.5
作者：
M. Bednarek;K. Brzezinska;Jacek Stasiński;P. Kubisa;S. Penczek
通讯作者：
M. Bednarek;K. Brzezinska;Jacek Stasiński;P. Kubisa;S. Penczek
影响因子：
5.2
作者：
Matsumoto, A;Chen, H;Unger, K
通讯作者：
Unger, K
影响因子：
7.3
作者：
EMEIS, CA
通讯作者：
EMEIS, CA