| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.162 |
| 발표분야 | 고분자 구조 및 물성 |
| 제목 | Sequential Formation of Exquisite Calcium Carbonate Structures with a One-Pot Process: From Solid/Hollow Spheres to Sponge-like/Solid Films |
| 초록 | Organisms produce complex nanostructured biomineral materials that are supported by acidic proteins and have excellent mechanical properties. The strategy of mimicking these natural processes opens new avenues for material design in both scientific and industrial fields. Interestingly, amorphous minerals, which are less stable and more soluble than crystalline ones, have an important basic function in many biomineral formation processes as transient precursor phase of crystalline ones. Here we introduce a robust demonstration of the role of an amorphous precursor phase in biomineralization, and the sequential formation of an exquisite CaCO3 mineral via a one-pot solution route, in which amorphous microparticles in the presence of a small amount of synthetic acidic macromolecules are sequentially transformed into hollow vaterite microparticles, sponge-like vaterite films and solid vaterite films by the CO2 diffusion method. We propose a mechanism for the formation of hollow spheres, which may have potential applications as host capsule materials, namely their formation by crystallization on the particle surface, and the subsequent dissolution of their core. Our findings provide a new strategy for the sequential formation of biominerals in the presence of small amount of organic additives. 그림1. Schematic diagram showing poly(acrylic acid)-assisted hollow calcium carbonate formation. Acknowledgement This work was supported by grant (code #: 04K1501-01310 ) from ‘center for Nanostructural Materials Technology’ under ‘the 21st Century Frontier R&D Programs’ of the Ministry of Science and Technology, the National Research Laboratory Program of the Ministry of Science and Technology of Korea, and the Brain Korea 21 Program of the Korean Ministry of Education. |
| 저자 | 한중탁, Xurong Xu, 김도환, 이지황, 조길원 |
| 소속 | 포항공과대 |
| 키워드 | Hollow sphere; calcium carbonate; biomineralization; poly(acrylic acid) |
