文献类型：期刊文献

英文题名：Novel bio-inspired three-dimensional nanocomposites based on montmorillonite and chitosan

作者：Zheng, Xiu[1];Xu, Mengdie[1];Yang, Shuai[1];Omonov, Shakhzodjon[1];Huang, Shuaijian[1];Zhao, Jing[1];Ruan, Huajun[1,2];Zeng, Minfeng[1]

机构：[1]Shaoxing Univ, Coll Chem Chem Engn, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Zhejiang Fenix Hlth Technol Co Ltd, Zhuji 311804, Peoples R China

年份：2020

卷号：165

起止页码：2702

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：SCI-EXPANDED(收录号：WOS:000600773500103)、、EI(收录号：20240815601222)、Scopus(收录号：2-s2.0-85094579204)、WOS

基金：The authors acknowledge the financial support from the National Natural Science Foundation of China (Grant No. 11875193), Zhejiang Provincial Fundamental Public Welfare Research Project of China (Grant No. LGG18E030004), and University Students' Science and Technology Innovation Activity Plan Project of Zhejiang Province (Grant No. 2020R44404).

语种：英文

外文关键词：Chitosan; Montmorillonite; 3D nanocomposite

外文摘要：In this study, inspired by nacre-like structural natural shells, novel three-dimensional (3D) nanocomposites based on natural nanoplatelets of montmorillonite (MMT) and polysaccharide of chitosan (CS) were prepared with solution intercalation and self-assembly process. The CS-intercalated-MMT nanoplatelets units acted as "bricks" and CS molecules acted as "mortar", arranging in fairly well-ordered layered structure. With addition of glutaraldehyde (GA) and Pd2+ cations, synergistic toughening and strengthening effects of covalent and ionic bonds could be achieved. The best mechanical properties of the prepared 3D nanocomposites were observed as 5.6 KJ/m(2) (impact strength), 3.3 GPa (flexural modulus), and 65.8 MPa (flexural strength), respectively, which showed higher toughness but lower flexural properties than natural pearl mussel shells. Nevertheless, both the impact and flexural properties of the prepared 3D nanocomposite were much higher than the other natural shell, i.e. green grab shell. Besides conventional methods characterizations, the nacre-like structure of the artificial 3D nanocomposite was further evidenced with positron annihilation lifetime spectroscopy characterizations. This work might facilitate a versatile platform for developing green 3D bionanocomposites with fairly good mechanical properties. (C) 2020 Elsevier B.V. All rights reserved.