Low swelling and high mechanical strength organosilane hybrid polydivinylbenzene microspheres for hydrophilic interaction chromatography applications

Author:

Yang Yang1,Li Yuexin1,Zhao Yang1,Cai Changyu1,Liang Xinmiao1ORCID,Ke Yanxiong1ORCID

Affiliation:

1. Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy East China University of Science and Technology Shanghai China

Abstract

In this work, monodisperse organosilane hybrid polymer microspheres with a particle size of about 5 µm were synthesized using seed swelling polymerization. The organosilicon reagent methacryloxypropyltrimethoxysilane was introduced into the polymer framework as a copolymerization monomer, and the crosslinking degree of the microspheres was improved by the hydrolysis‐condensation reaction of siloxanes. The synthesized hybrid microspheres have good mechanical strength as well as low swelling, with swelling propensity values of 0.167 and 0.348 in methanol and acetonitrile, respectively. Hybrid microspheres modified with cysteine have a hydrophilic interaction chromatography/reversed‐phase liquid chromatography mixed‐mode retention mechanism. Compared to the commercial cysteine‐modified silica column, the synthesized stationary phase has higher separation selectivity for partially acidic or basic samples and better basic resistance for use under high pH mobile phase conditions (at least 10).

Publisher

Wiley

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