TY - JOUR
T1 - Surface-confined radical chain transfer
T2 - The intermediate reaction for chemically attaching polymer films on porous silica for chromatographic application
AU - Liu, Shujuan
AU - Zhou, Feng
AU - Di, Duolong
AU - Jiang, Shengxiang
PY - 2004/9/6
Y1 - 2004/9/6
N2 - Surface-confined chain transfer reaction in free radical polymerization of different monomers leads to polymer-grafted silica particles. Porous silica is selected as the carrier of potential thiol chain transfer groups and as stationary phase in high-performance liquid chromatography (HPLC). The thiol-terminated silica and polymer over-layer-modified silica are characterized by FT-IR and Raman spectra. The chemical composite and the grafting amount of polymer on silica surface are measured by X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), etc. The grafting amount of polymer on silica surface and the molecular weight of free polymer formed in bulk solution decrease with the addition of thiol-terminated silica coincide with each other. The obtained polymethylmethacrylate (PMMA)-modified silica exhibits excellent separation capacity for three series of selected compounds, i.e. aromatic compounds and alkaloids, and displays the reversed-phase separation mechanism.
AB - Surface-confined chain transfer reaction in free radical polymerization of different monomers leads to polymer-grafted silica particles. Porous silica is selected as the carrier of potential thiol chain transfer groups and as stationary phase in high-performance liquid chromatography (HPLC). The thiol-terminated silica and polymer over-layer-modified silica are characterized by FT-IR and Raman spectra. The chemical composite and the grafting amount of polymer on silica surface are measured by X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), etc. The grafting amount of polymer on silica surface and the molecular weight of free polymer formed in bulk solution decrease with the addition of thiol-terminated silica coincide with each other. The obtained polymethylmethacrylate (PMMA)-modified silica exhibits excellent separation capacity for three series of selected compounds, i.e. aromatic compounds and alkaloids, and displays the reversed-phase separation mechanism.
KW - Chain transfer reaction
KW - High-performance liquid chromatography
KW - Methylmethacrylate
KW - Stationary phase
KW - Surface-initiated polymerization
UR - http://www.scopus.com/inward/record.url?scp=4444342448&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2004.05.016
DO - 10.1016/j.colsurfa.2004.05.016
M3 - 文章
AN - SCOPUS:4444342448
SN - 0927-7757
VL - 244
SP - 87
EP - 93
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 1-3
ER -