Chitosan nanoparticles affect polymorph selection in crystallization of calcium carbonate

Add time:07/24/2019    Source:sciencedirect.com

Stable suspensions of chitosan nanoparticles were produced by the inverse miniemulsion technique and used as substrates for the crystallization of various polymorphs of calcium carbonate (CaCO3). These bioinspired chitosan nanoparticles were cross-linked with 1,4-butanediol diglycidyl ether, had an average particle diameter of 100–350 nm, and displayed pH-sensitive swelling behavior. X-ray diffraction demonstrated that vaterite and calcite were obtained when calcium carbonate was mineralized in the chitosan nanoparticle suspension. The extent of vaterite stabilization depends on the cross-linking fraction of the chitosan nanoparticles and the crystallization conditions.

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