Ge Mingliang, Li Yueying, Yang Yinye, Wang Yanwu, Liang Guodong, Hu Guoqing, S M Jahangir Alam
Key Laboratory of Polymer Processing Engineering of Ministry of Education, National Engineering Research Center of Novel Equipment for Polymer Processing, School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510640, China.
School of Material Science and Engineering, Guizhou Minzu University, Guiyang 550000, China.
Polymers (Basel). 2019 Aug 22;11(9):1378. doi: 10.3390/polym11091378.
The layered hydrated sodium salt-magadiite (MAG), which has special interpenetrating petals structure, was used as a functional filler to slowly self-assemble with sodium carboxy-methylcellulose (CMC), in order to prepare nacre-like nanocomposite film by solvent evaporation method. The structure of prepared nacre-like nanocomposite film was characterized by Scanning Electron Microscope (SEM) and X-ray diffraction (XRD) analysis; whereas, it was indicated that CMC macromolecules were inserted between the layers of MAG to increase the layer spacing of MAG by forming an interpenetrating petals structure; in the meantime, the addition of MAG improved the thermal stability of CMC. The tensile strength of CMC/MAG was significantly improved compared with pure CMC. The tensile strength of CMC/MAG reached the maximum value at 1.71 MPa when the MAG content was 20%, to maintaining high transparency. Due to the high content of inorganic filler, the flame retarding performance and the thermal stability were also brilliant; hence, the great biocompatibility and excellent mechanical properties of the bionic nanocomposite films with the unique interpenetrating petals structure provided a great probability for these original composites to be widely applied in material research, such as tissue engineering in biomedical research.
具有特殊互穿花瓣结构的层状水合钠盐——水羟硅钠石（MAG）被用作功能填料，与羧甲基纤维素钠（CMC）缓慢自组装，通过溶剂蒸发法制备类珍珠层纳米复合薄膜。通过扫描电子显微镜（SEM）和X射线衍射（XRD）分析对制备的类珍珠层纳米复合薄膜的结构进行了表征；结果表明，CMC大分子插入到MAG层间，通过形成互穿花瓣结构增加了MAG的层间距；同时，MAG的加入提高了CMC的热稳定性。与纯CMC相比，CMC/MAG的拉伸强度显著提高。当MAG含量为20%时，CMC/MAG的拉伸强度达到最大值1.71MPa，同时保持高透明度。由于无机填料含量高，其阻燃性能和热稳定性也很出色；因此，具有独特互穿花瓣结构的仿生纳米复合薄膜具有良好的生物相容性和优异的力学性能，为这些原始复合材料在材料研究中的广泛应用提供了很大的可能性，如生物医学研究中的组织工程。
