当前位置： SCI文献检索 > INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES期刊下所有文献 > Novel bio-inspired three-dimensional nanocomposites based on montmorillonite and chitosan.

Novel bio-inspired three-dimensional nanocomposites based on montmorillonite and chitosan.

Abstract：

: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/m2 (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.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Zheng X,Xu M,Yang S,Omonov S,Huang S,Zhao J,Ruan H,Zeng M

doi

10.1016/j.ijbiomac.2020.10.070

subject

Has Abstract

pub_date

2020-12-15 00:00:00

pages

2702-2710

issue

Pt B

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(20)34702-4

journal_volume

165

pub_type

杂志文章

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