Bioinspired hierarchical interface design for improved mechanical and safety properties in energetic polymer composites

Weak interfacial interaction and poor surface wettability always restrict and weaken the performances of energetic composites. Conventional surface modifications can hardly achieve a desired result, due to the inadequacy for solving the interfacial incompatibility. We here demonstrated bioinspired h...

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Bibliographic Details
Published in:Journal of materials science 2020-11, Vol.55 (33), p.15726-15740
Main Authors: He, Guansong, Li, Xin, Jiang, Yueqiang, Dai, Yu, Xu, Rong, Zeng, Chengcheng, Tu, Xiaoqing, Yang, Zhijian
Format: Article
Language:English
Subjects:
Biomimetics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Composites & Nanocomposites
Crystallography and Scattering Methods
Cushioning
Incompatibility
Materials Science
Mechanical properties
Polymer matrix composites
Polymer Sciences
Polymerization
Polyurethane resins
Polyurethanes
Safety
Solid Mechanics
Structural hierarchy
Wettability
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Summary:Weak interfacial interaction and poor surface wettability always restrict and weaken the performances of energetic composites. Conventional surface modifications can hardly achieve a desired result, due to the inadequacy for solving the interfacial incompatibility. We here demonstrated bioinspired hierarchical-structured 2,6-diamino-3,5-dinitropyrazine-1-oxide particles through in situ “grafting from” polymerization of hyperbranched polyurethane (HBPU) on polydopamine surface. Benefiting from the enhanced interfacial interaction and surface wettability which facilitated mechanical performance, the final results revealed that a remarkable mechanical enhancement was successfully achieved through this way. Meanwhile, improved safety performance was gained, and the impact sensitivity was reduced to a large extent which was ascribed to the cushioning and protective effects of HBPU shells with soft segments. We believe this approach of constructing bioinspired hierarchical interface aiming at solving low surface wettability and weak interface will shed light on the design and preparation of high-performance composites through a novel and effective way. Graphic abstract
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-020-05130-3