期刊
APPLIED SURFACE SCIENCE
卷 459, 期 -, 页码 129-137出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2018.07.194
关键词
Nacre; Amorphous calcium carbonate; Chitosan; Nanocomposite films
类别
资金
- National Natural Science Foundation of China [21601147, 21771002, 21707074]
- Sichuan province science and technology Program [2017GZ0342, 2016NZ0051, 2016GZ0259, 2016GZ0277]
- Sichuan Province Education Department Program [17zd1131, 14ZA0104, 18za0494]
- Plan Projects of Mianyang Science and Technology [16N-01-7]
- China Postdoctoral Fund [187176]
- Southwest University of Science and Technology Longshan Academic Talent Research Support Plan [17LZX526]
Amorphous calcium carbonate/chitosan (ACC/CS) nanocomposite films containing Mg-ACC (0-100 wt%) are prepared by simple natural evaporation-induced assembly. The influence of Mg-ACC content on the mechanical properties as well as cross-section of ACC-CS nanocomposite films were systematically investigated. The nanocomposite films exhibit an excellent mechanical property at Mg-ACC contents of 80 wt% compared to ordinary calcium carbonate/chitosan composites. With content of Mg-ACC increasing, the mechanical properties of ACCCS nanocomposite films were further increased, reaching a maximum when the content of Mg-ACC to 80 wt%. Strength and Young's modulus of the 80 wt% ACC-CS nanocomposite film reach 121.67 MPa and 31.96 GPa, respectively, which is 2.3 and 5.1 times higher than that of the pure CS film. After undergoing Mg-ACC crystal transformation when the Mg-ACC content is greater than 80 wt%, the smooth structure was transformed into crystal-like agglomerates, which deteriorates mechanical properties. Furthermore, the as-prepared nanocomposite films show excellent hydrophobicity and high biocompatibilities for boosting the growth of Cell-293T. In addition, we also proposed a physical model for the dispersion of Mg-ACC in CS matrix, which could better explain the enhancement of the mechanical properties of nanocomposite films. The above results provide a comprehensive understanding of the development of high-performance bionic nanocomposites loaded with high nanofillers.
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