A bio-inspired nacre-like layered hybrid structure of calcium carbonate under the control of carboxyl graphene
A bio-inspired nacre-like layered hybrid structure of calcium carbonate under the control of carboxyl graphene
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DOI：
10.1039/c4ce01632g
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发表时间：
2015-01-01
期刊：
影响因子：
3.1
通讯作者：
Wei, Hao
中科院分区：
文献类型：
--
作者：
Li, Jie;Liu, Dandan;Wei, Hao
在本文中，羧基石墨烯（GO-COOH）片矩阵，这是严重氧化和类似的有机基质的软体动物，被用来构建珍珠层样的层状结构。结果表明，杂化材料表面光滑，横截面呈多层结构。复合材料的表面和层间均生成碳酸钙（CaCO 3）晶体。此外，发现层状结构的自发性与CaCO 3晶体的浓度密切相关，其中高浓度可以抑制该过程，突出了CaCO 3浓度的决定作用。为了更好地理解层状结构的形成机制，采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）、热重分析（TGA）和傅里叶变换红外光谱（FT-IR）。该工作为构建类珍珠层层状杂化结构提供了一种高效、可控的方法，对推进GO-COOH在生物医学工程，特别是仿生材料领域的应用具有重要的意义。
In this paper, carboxyl graphene (GO-COOH) sheet matrices, which are heavily oxygenated and are similar to the organic matrices of molluscs, were used to construct nacre-like layered structures. The results showed that the surface of the hybrids was smooth and the cross section had a multilayer structure. Both the surface and the interlayer of the composite material generated calcium carbonate (CaCO3) crystals. Furthermore, the spontaneity of the layered structure was found to be closely related to the concentration of the CaCO3 crystals in which high concentration could inhibit the process, highlighting the determining role of the CaCO3 concentration. To better understand the mechanisms for the formation of the layered structure, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and Fourier transform infrared spectrometry (FT-IR) were employed. This work presents an efficient and controllable way to construct nacre-like layered hybrid structures and also has great potential for promoting the application of GO-COOH in biomedical engineering, especially in the field of biomimetic materials.