Please use this identifier to cite or link to this item:
|Title:||Biomimetic synthesis of calcium carbonate thin films using hydroxylated poly(methyl methacrylate) (PMMA) template||Authors:||Jayaraman, A.
|Issue Date:||Jan-2007||Citation:||Jayaraman, A., Subramanyam, G., Sindhu, S., Ajikumar, P.K., Valiyaveettil, S. (2007-01). Biomimetic synthesis of calcium carbonate thin films using hydroxylated poly(methyl methacrylate) (PMMA) template. Crystal Growth and Design 7 (1) : 142-146. ScholarBank@NUS Repository. https://doi.org/10.1021/cg060172t||Abstract:||Morphosynthesis of calcium-rich materials by tuning the chemical structure of organic matrices has tremendous potential in the preparation of functional mineralized materials. In this paper, we have demonstrated the deposition of thin films of CaCO3 by subtle modifications of the backbone of poly(methyl methacrylate) (PMMA) by the incorporation of many hydroxyl groups. The water-insoluble hydroxylated PMMA (HyPMMA) was used as a template along with poly(acrylic acid) (PA) as an additive for CaCO3 mineralization. Thin film deposition was controlled by the addition of an appropriate amount of PA to the crystallization medium. At lower concentrations (PA = 50 and 100 μg/mL), irregular aggregates of calcite crystallites were formed. As the concentration of PA was increased (500 μg/mL and 1 mg/mL), calcite thin films were deposited. Time-dependent crystallization showed that the precipitates obtained after 3 h were biphasic in structure, consisting of both amorphous and crystalline domains. Observations suggest that crystal aggregates and thin films were formed through a multistep mechanism in which an amorphous phase was deposited initially and was subsequently transformed into stable crystalline form. In contrast, mineralization in the presence of HyPMMA or PA alone yielded only calcite or calcite aggregates. Our results indicate that a concerted interplay of interactions between the insoluble polymer matrix (HyPMMA) and soluble PA determines the growth and morphology of CaCO3 by influencing the transformation of amorphous calcium carbonate (ACC) into the crystalline phase. More specifically, we have investigated the interplay of the role of acid groups on PA and accelerating alcohol groups on HyPMMA in calcium carbonate crystallization. © 2007 American Chemical Society.||Source Title:||Crystal Growth and Design||URI:||http://scholarbank.nus.edu.sg/handle/10635/116241||ISSN:||15287483||DOI:||10.1021/cg060172t|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jul 14, 2020
WEB OF SCIENCETM
checked on Jul 14, 2020
checked on Jul 11, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.