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Biomineralization of Calcium Phosphate and Calcium Carbonate within Iridescent Chitosan/Iota-Carrageenan Multilayered Films
Langmuir ( IF 3.7 ) Pub Date : 2018-07-01 00:00:00 , DOI: 10.1021/acs.langmuir.8b00434
Rayomand Shahlori 1, 2 , Daniel R. McDougall 1 , Geoffrey I. N. Waterhouse 1, 2 , Feihong Yao 1 , Jitendra P. Mata 3 , Andrew R. J. Nelson 3 , Duncan J. McGillivray 1, 2
Langmuir ( IF 3.7 ) Pub Date : 2018-07-01 00:00:00 , DOI: 10.1021/acs.langmuir.8b00434
Rayomand Shahlori 1, 2 , Daniel R. McDougall 1 , Geoffrey I. N. Waterhouse 1, 2 , Feihong Yao 1 , Jitendra P. Mata 3 , Andrew R. J. Nelson 3 , Duncan J. McGillivray 1, 2
Affiliation
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This work systematically explores the biomineralization of calcium phosphate (CaP) and carbonate (CaCO3) within chitosan/iota-carrageenan multilayer films. Multilayer films of chitosan and iota-carrageenan (up to 128-coupled layers) were prepared on glass substrates by a layer-by-layer dip-coating technique. Cryo-scanning electron microscopy revealed dense interfaces between the chitosan and iota-carrageenan layers with thicknesses in the range 250 and 350 nm in the hydrated state, accounting for the iridescent nature of multilayer films when wet. Immersion of the multilayered films in simulated body fluid or simulated seawater at 25 °C resulted in the mineralization of CaP and CaCO3, respectively, at the interfaces between the biopolymer layers and modified the iridescence of the films. Lamellar scattering features in small-angle neutron scattering measurements of the mineralized films provided evidence of the localized mineralization. Further evidence of this was found through the lack of change in the dynamic and static correlation lengths of the polymer networks within the bulk phase of the chitosan and iota-carrageenan layers. CaP mineralization occurred to a greater extent than CaCO3 mineralization within the films, evidenced by the higher lamellar density and greater rigidity of the CaP-mineralized films. Results provide valuable new insights into CaP and CaCO3 biomineralization in biopolymer networks.
中文翻译：
彩虹色壳聚糖/ Iota-角叉菜胶多层膜中磷酸钙和碳酸钙的生物矿化
这项工作系统地探索了壳聚糖/碘-卡拉胶多层膜中磷酸钙（CaP）和碳酸盐（CaCO 3）的生物矿化作用。通过逐层浸涂技术在玻璃基板上制备了壳聚糖和iota-角叉菜聚糖的多层膜（最多128个耦合层）。低温扫描电子显微镜显示，在水合状态下，壳聚糖层和iota角叉菜胶层之间的致密界面厚度在250和350 nm之间，这说明了多层膜在潮湿时的虹彩性质。将多层薄膜浸入25°C的模拟体液或模拟海水中会导致CaP和CaCO 3的矿化分别在生物聚合物层之间的界面处，并改变了膜的虹彩性。矿化膜小角度中子散射测量中的层状散射特征提供了局部矿化的证据。通过在壳聚糖层和iota-角叉菜胶层的本体相内的聚合物网络的动态和静态相关长度的变化没有发现，发现了更多的证据。CaP矿化比膜内的CaCO 3矿化发生的程度更大，这可以通过CaP矿化膜的更高的层状密度和更大的刚性来证明。结果为生物聚合物网络中的CaP和CaCO 3生物矿化提供了有价值的新见解。
更新日期：2018-07-01
中文翻译：
彩虹色壳聚糖/ Iota-角叉菜胶多层膜中磷酸钙和碳酸钙的生物矿化
这项工作系统地探索了壳聚糖/碘-卡拉胶多层膜中磷酸钙（CaP）和碳酸盐（CaCO 3）的生物矿化作用。通过逐层浸涂技术在玻璃基板上制备了壳聚糖和iota-角叉菜聚糖的多层膜（最多128个耦合层）。低温扫描电子显微镜显示，在水合状态下，壳聚糖层和iota角叉菜胶层之间的致密界面厚度在250和350 nm之间，这说明了多层膜在潮湿时的虹彩性质。将多层薄膜浸入25°C的模拟体液或模拟海水中会导致CaP和CaCO 3的矿化分别在生物聚合物层之间的界面处，并改变了膜的虹彩性。矿化膜小角度中子散射测量中的层状散射特征提供了局部矿化的证据。通过在壳聚糖层和iota-角叉菜胶层的本体相内的聚合物网络的动态和静态相关长度的变化没有发现，发现了更多的证据。CaP矿化比膜内的CaCO 3矿化发生的程度更大，这可以通过CaP矿化膜的更高的层状密度和更大的刚性来证明。结果为生物聚合物网络中的CaP和CaCO 3生物矿化提供了有价值的新见解。
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