Materials Reports  2019, Vol. 33 Issue (Z2): 617-622 |
| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Construction of High Barrier Aliphatic Polyester Composites Based on HierarchicalLayered Clays |
| YAO Jin1, MAO Long1,2, LIU Xiaochao1, LI Zhihan1
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1 Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province, Hunan University of Technology, Zhuzhou 412007;
2 Fujian Provincial Key Laboratory of Functional Materials and Applications, Xiamen University of Technology, Xiamen 361024 |
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Abstract In this paper, MgAl-CO3 LDHs (P-LDHs) were used as precursor to prepare hierarchical LDHs (H-LDHs) with large specific surface area by calcination-rehydration method. The effect of different rehydration conditions on the micro-morphology of H-LDHs was studied. And H-LDHs/PCL composites were prepared by mixing H-LDHs with poly(ε-caprolactone) (PCL) by solution casting method. The effect of H-LDHs on the structure and properties of H-LDHs/PCL composites was also studied. The results showed that a large number of vertically aligned nano-sheets were formed on the surface of H-LDHs, forming a multi-level hierarchical structure. The specific surface area of H-LDHs (146.6 m2/g) was 3.67 times of that of P-LDHs. The results of oxygen temperature programmed desorption showed that there is strong chemisorption between H-LDHs and oxygen molecules. And H-LDHs improved the deterioration of mechanical properties of P-LDHs on PCL matrix. A large number of nano-layers vertically distributed on the surface of H-LDHs were closely combined with PCL matrix, and the interface area between H-LDHs and PCL matrix was increased. Compared with pure PCL, the oxygen permeability of H-LDHs/PCL composites decreased by 43.6%. The layered clay with this hierarchical structure can prolong the path parallel to the direction of gas permeation significantly, thus greatly improving the gas barrier properties. H-LDHs/PCL composites show good research value and application potential.
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Published: 25 November 2019
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| Fund:This work was financially supported by National Natural Science Foundation of China (11872179), Science and Technology Planning Project of Fujian Pro-vince (2018H6024), Natural Science Foundation of Hunan Province (2019JJ50132), High-Level Talents Support Plan of Xiamen University of Technology (YKJ19008R). |
About author:: Jin Yao received her Ph.D. in materials science and engineering from Hunan University of Technology in December 2018. The main research direction is the reduction packaging structure and safety design. Focusing on the rapid preparation of green degradable materials and the problem of their application in packaging, natural fibers were used as raw materials to prepare nano crystal whiskers and nano filaments, Combine with biomass materials used to prepare fully degradable composite materials. By studying the relationship between the mesoscopic structure and physical properties of the composite materials, green packaging materials with good mechanical properties and barrier properties were prepared. In recent years, she has participated in or presided over a number of national, provincial and university research projects, published more than 10 journal papers, applied for 6 national invention patents, including 3 authorized patents.
Long Mao received his Ph.D. degree in materials science and engineering from Hunan University of Technology in June 2018. He is mainly engaged in the structural design and functionalization of layered clay, and applied it to the preparation of high-performance degra-dable polymer packaging materials. In recent years, he has participated in or presided over a number of natio-nal, provincial and enterprise research projects, published 15 journal papers as the first author, including 8 papers published in SCI journal, 6 papers published in SCI journal, and applied for more than 10 national invention patents, including 5 authorized patents. |
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