10-MDP 与氧化锆的化学相互作用机制。
Chemical interaction mechanism of 10-MDP with zirconia.
机构信息
Advanced Research Center for Oral and Craniofacial Sciences, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan.
Center for Innovative Clinical Medicine, Okayama University Hospital, 2-5-1 Shikata-cho, Kikta-ku, Okayama 700-8558, Japan.
出版信息
Sci Rep. 2017 Mar 30;7:45563. doi: 10.1038/srep45563.
Currently, the functional monomer 10-methacryloyloxy-decyl-dihydrogen-phosphate (10-MDP) was documented to chemically bond to zirconia ceramics. However, little research has been conducted to unravel the underlying mechanisms. This study aimed to assess the chemical interaction and to demonstrate the mechanisms of coordination between 10-MDP and zirconium oxide using H and P magic angle spinning (MAS) nuclear magnetic resonance (NMR) and two dimensional (2D) H → P heteronuclear correlation (HETCOR) NMR. In addition, shear bond-strength (SBS) tests were conducted to determine the effect of 10-MDP concentration on the bonding effectiveness to zirconia. These SBS tests revealed a 10-MDP concentration-dependent SBS with a minimum of 1-ppb 10-MDP needed. P-NMR revealed that one P-OH non-deprotonated of the POH group from 10-MDP chemically bonded strongly to zirconia. H-P HETCOR NMR indicated that the 10-MDP monomer can be adsorbed onto the zirconia particles by hydrogen bonding between the P=O and Zr-OH groups or via ionic interactions between partially positive Zr and deprotonated 10-MDP (P-O). The combination of H NMR and 2D H-P HETCOR NMR enabled to describe the different chemical states of the 10-MDP bonds with zirconia; they not only revealed ionic but also hydrogen bonding between 10-MDP and zirconia.
目前，功能单体 10-甲基丙烯酰氧癸基二氢磷酸酯（10-MDP）已被证明可与氧化锆陶瓷发生化学键合。然而，对于其相关的作用机制还鲜有研究。本研究旨在通过氢（H）和磷（P）魔角旋转（MAS）核磁共振（NMR）和二维（2D）H→P 异核相关（HETCOR）NMR 评估 10-MDP 与氧化锆之间的化学相互作用和配位机制。此外，我们还进行了剪切结合强度（SBS）测试，以确定 10-MDP 浓度对氧化锆结合效果的影响。SBS 测试结果表明，SBS 与 10-MDP 浓度有关，最低浓度为 1ppb 10-MDP。磷（P）NMR 表明，10-MDP 的一个 P-OH 非质子化基团与 POH 基团从 10-MDP 化学结合到氧化锆上。H-P HETCOR NMR 表明，10-MDP 单体可以通过 P=O 和 Zr-OH 基团之间的氢键或部分正 Zr 和去质子化的 10-MDP（P-O）之间的离子相互作用吸附到氧化锆颗粒上。H NMR 和 2D H-P HETCOR NMR 的结合可以描述 10-MDP 与氧化锆键的不同化学状态；它们不仅揭示了 10-MDP 与氧化锆之间的离子键，还揭示了氢键。
Zotero 插件