Abstract
Synthesis of conjugated polymer-coated latex particles is an effective method to improve the poor processability of conjugated polyheterocycles. The key to success is to control the overlayer thickness so it is less than the size of the solvated layer of polymeric stabilizer. This paper presents a protocol to coat polymer latex particles with poly(2-aminothiazole) (PAT), which is a relatively new heterocyclic conjugated polymer. The protocol is based on chemical oxidative polymerizations of 2-aminothiazole using copper chloride as the oxidant at a fixed oxidant/monomer molar ratio of 0.5 in aqueous media in the presence of poly(N-vinyl-2-pyrrolidone)-functionalized polystyrene (PS) latex. The effects of monomer concentration, PS concentration, and polymerization temperature on the morphology of the PAT-coated PS composite particles were investigated by SEM and TEM, and the resulting composite particles characterized by FTIR and XPS. Optimization of the initial monomer concentration allowed colloidally stable PAT-coated PS composite particles to be formed at ambient temperature, and the PAT loading was easily adjusted by varying the initial PS concentration. The Hg(II) adsorption properties of selected PAT-coated PS composite particles were assessed preliminarily. The maximum adsorption capacity at 25 °C reached 440.25 mg/g, which is much higher than many other adsorbents.
Highlights
Conjugated polymers typically involve polyheterocycles, such as polypyrrole (PPy), polyaniline (PANI), and poly(3,4-ethylenedioxythiophene) (PEDOT), which can be synthesized by electrochemical or chemical oxidative polymerization methods
The effects of monomer concentration, PS concentration, and polymerization temperature on the morphology of the PAT-coated PS composite particles were investigated by SEM and TEM, and the resulting composite particles characterized by FTIR and XPS
Optimization of the initial monomer concentration allowed colloidally stable PAT-coated PS composite particles to be formed at ambient temperature, and the PAT loading was adjusted by varying the initial PS concentration
Summary
Conjugated polymers typically involve polyheterocycles, such as polypyrrole (PPy), polyaniline (PANI), and poly(3,4-ethylenedioxythiophene) (PEDOT), which can be synthesized by electrochemical or chemical oxidative polymerization methods. A series of conjugated polymer-coated latex particles based on PPy, PANI, and PEDOT has been prepared by chemical oxidative polymerization in the presence of preformed latex particles, respectively [1]. Relatively new chemical heterocyclic conjugated polymer thatvarious can be polymerized from 2-aminothiazole by the oxidative method with polymerized from. Analogous to polyaniline polypyrrole, PAT chemical prepared by the chemical oxidative method aggregated, meanswhich there means is a relatively surface area for adsorption. One elegant solution to this problem is to synthesize polymer-coated latex particles, which have a reasonably higher amount of conjugated polymer on the on surface.
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