Preparation of well-defined environmentally responsive polymer brushes on monolithic surface by two-step atom transfer radical polymerization method for HPLC

被引：23
作者：
Shen, Ying [1 ,2 ]
Qi, Li [1 ]
Wei, Xiaoyi [1 ,2 ]
Zhang, Rongyue [1 ,2 ]
Mao, Lanqun [1 ]
机构：
[1] Chinese Acad Sci, Inst Chem, Key Lab Analyt Chem Living Biosyst, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
来源：
POLYMER | 2011年 / 52卷 / 17期
关键词：
Poly (2-(dimethylamino) ethyl methacrylate) brushes; pH; and salt-response; monolith; two-step atom transfer radical; polymerization method; HYDROPHOBIC INTERACTION CHROMATOGRAPHY; SWELLING BEHAVIOR; STATIONARY-PHASE; SEPARATION; ATRP; INTERFACE; HYDROGELS; DENSITY; SYSTEM;
D O I：
10.1016/j.polymer.2011.06.041
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Well-defined poly (2-(dimethylamino) ethyl methacrylate) (PDMAEMA) brushes were successfully prepared on the monolithic surface via two-step atom transfer radical polymerization (ATRP). The polymer brushes synthesized by the second-step ATRP were based on the active bromic groups resulting from poly (ethylene glycol dimethacrylate) (pEDMA) monolith which was prepared at room temperature by the first-step ATRP. Element analysis was used to monitor the grafting process at different reaction times. Each step of preparation was characterized by scanning electron microscope, infrared spectrum and mercury intrusion porosimetry. Employment of PDMAEMA grafted monolith as the stationary phase for chromatographic analysis of steroids demonstrated that the PDMAEMA brushes possessed both pH- and salt-responsive properties. Noticeably, it has been found that the chain length of PDMAEMA brushes could influence the retention behavior of steroids due to the controllability of ATRP, which proposed an interesting alternative to modulate retention in HPLC. This is the first application of PDMAEMA brushes grafted monolith by two-step ATRP method for constructing responsive surface in HPLC and it might exploit a new path for widening the monolith application in various fields. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3725 / 3731
页数：7
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