| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.24 |
| 발표분야 | 고분자 구조 및 물성 |
| 제목 | Biomimetic Fabrication of Vaterite Film from Amorphous Calcium Carbonate on Polymer Melt: Effect of Polymer Chain Mobility and Functionality |
| 초록 | We demonstrate that amorphous calcium carbonate (ACC) thin film crystallization on poly(ε-caprolactone) (PCL), poly(bisphenol A carbonate) (PC), poly(t-butyl acrylate) (PtBA) and poly(methyl methacrylate) (PMMA) substrates, is affected by the chain mobility and functionality of the polymers above and below their melting and glass transition temperatures. ACC films are transformed into metastable (004) vaterite films on PCL and PMMA melts, and are transformed into thermodynamically stable calcite (110) films on PC and PtBA substrates at 100oC. Based on our results, we suggest that in the melt phase, polymer chains containing ester groups trigger the formation of oriented vaterite films through interactions between the ester functionalities and ionic species present in ACC. In contrast, less reactive ester groups in polymer substrates, as well as esters in the solid phase, were found not to affect the kinetic growth of CaCO3 crystals in ACC in air. A comparison of the ACC film crystallization processes on PCL and PC established a dependency on the chain mobility of the polymers, and on PtBA and PMMA, it was confirmed that the ester group reactivity also affects the crystallization of ACC films. Figure 1. Scheme of transformation of an amorphous calcium carbonate film on polymer film at 100oC. |
| 저자 | 한중탁1, Xurong Xu2, 조길원1 |
| 소속 | 1포항공과대, 2고분자(연) |
| 키워드 | Biomimetic; calcium carbonate; vaterite; polymer melt |
