|
个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：中国化学会创始会士、常务理事，中国化工学会会士
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：化工学院
学科：应用化学. 精细化工. 化学生物学
办公地点：大连理工大学西部校区知顺楼F-202#
http://peng-group.dlut.edu.cn/
联系方式：大连理工大学西部校区知顺楼F-202 辽宁省大连市高新区凌工路2号，大连116024 课题组网址：http://peng-group.dlut.edu.cn/ E-mail: pengxj@dlut.edu.cn
电子邮箱：pengxj@dlut.edu.cn
Chromatographic efficiency comparison of polyhedral oligomeric silsesquioxanes-containing hybrid monoliths via photo- and thermally-initiated free-radical polymerization in capillary liquid chromatography for small molecules
点击次数：
论文类型：期刊论文
发表时间：2015-09-04
发表刊物：JOURNAL OF CHROMATOGRAPHY A
收录刊物：SCIE、EI、PubMed
卷号：1410
页面范围：110-117
ISSN号：0021-9673
关键字：Hybrid monoliths; Methacrylate epoxy cyclosiloxane; POSS; Free-radical polymerization; 2,2-Dimethoxy-2-phenylacetophenone; Photochemical initiation
摘要：Monolithic poly(methacrylate epoxy cyclosiloxane-co-polyhedral oligomeric silsesquioxanes) (epoxy-MA-PUSS) capillary columns have been prepared via either photo- or thermally-initiated polymerization of the corresponding monomers using a 1-propanol/PEG 400 mixture as porogens. Photochemical polymerization was accomplished by irradiation of the UV-transparent capillary for 10 min at room temperature, while thermal polymerization was performed at 55 degrees C, 60 degrees C or 65 degrees C for 18 h. The evaluation of chromatographic property for two hybrid epoxy-MA-PUSS monoliths was carried out. The results indicate that hybrid monoliths fabricated by photochemical initiation exhibit higher column efficiency (97,000-98,400 plates/m) than those synthesized by thermal polymerization (41,100-48,000 plates/m) in cLC. The higher efficiency of photo-initiated hybrid monoliths is closely related to lower eddy dispersion (A-term) and mass transfer resistance (C-term). (C) 2015 Elsevier B.V. All rights reserved.