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Separations 2018, 5(1), 15; https://doi.org/10.3390/separations5010015

Enhancement of Thermal Stability and Selectivity by Introducing Aminotriazine Comonomer to Poly(Octadecyl Acrylate)-Grafted Silica as Chromatography Matrix

1
Department of Applied Chemistry and Chemical Engineering, University of Dhaka, Dhaka 1000, Bangladesh
2
Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
3
Kumamoto Institute for Photo-Electro Organics (Phoenics), 3-11-38 Higashimachi, Higashi-ku, Kumamoto 862-0901, Japan
*
Authors to whom correspondence should be addressed.
Received: 28 December 2017 / Revised: 8 February 2018 / Accepted: 9 February 2018 / Published: 21 February 2018
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Abstract

This paper introduces a poly(octadecyl acrylate) (pODA)-based organic phase on silica, which is assisted by 2-vinyl-4,6-diamino-1,3,5-triazine (AT), for a chromatography stationary phase. The ODA-AT copolymer grafting onto silica surface was characterized by elemental analysis, FT-IR spectroscopy, scanning electron microscopy, thermo gravimetric analysis and differential scanning calorimeter (DSC). An endothermic peak top of the copolymer-grafted silica was increased to 46 °C from 38 °C, which was a peak top of pODA homopolymer. For high performance liquid chromatography (HPLC) application, the molecular selectivity increased with an increase in the AT contents of the ODA-AT copolymer as organic phase. The co-existence of an aminotriazine moiety in the copolymer promoted side-chain ordering of the poly(octadecyl) moiety, thus enhancing molecular planarity selectivity for PAHs in reversed-phase liquid chromatography. View Full-Text
Keywords: organic-inorganic hybrid; molecular shape selectivity; crystalline-to-isotropic phase transition; HPLC organic-inorganic hybrid; molecular shape selectivity; crystalline-to-isotropic phase transition; HPLC
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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K. Mallik, A.; Noguchi, H.; Han, Y.; Kuwahara, Y.; Takafuji, M.; Ihara, H. Enhancement of Thermal Stability and Selectivity by Introducing Aminotriazine Comonomer to Poly(Octadecyl Acrylate)-Grafted Silica as Chromatography Matrix. Separations 2018, 5, 15.

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