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A General Bioinspired, Metals-Based Synergic Cross-Linking Strategy toward Mechanically Enhanced Materials
Ke Chen1, Jin Ding1, Shuhao Zhang1
1Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, People's Republic of China.
ACS Nano
|February 28, 2017
Summary
A novel metal ion-based synergic cross-linking (MSC) strategy significantly enhances material strength and toughness. This approach uses low amounts of metal ions to create robust cross-linking networks, improving mechanical properties in various materials.
Area of Science:
- Materials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Developing lightweight engineering materials with high strength and toughness is a persistent challenge.
- Bioinspired and polymeric materials often exhibit reduced extensibility and toughness compared to bulk polymers.
Purpose of the Study:
- To introduce a versatile metal ion-based synergic cross-linking (MSC) strategy for enhancing material mechanical properties.
- To investigate the deformation and fracture mechanisms of synergic cross-linked graphene oxide (Syn-GO) paper.
Main Methods:
- Incorporation of eight types of metal ions into various material bulks using the MSC strategy.
- In situ nanoindentation scanning electron microscopy (SEM) to study the deformation and fracture behavior of Syn-GO paper.
Main Results:
- Drastic enhancement in tensile strength (24.1-70.8%), toughness (18.6-110.1%), modulus (21.6-66.7%), and hardness (6.4-176.5%) across multiple material types.
- Exploration of elastic-plastic deformation and brittle fracture behavior with indentation strain >5% in Syn-GO paper.
- Attribution of mechanical enhancement to complex metal-based cross-linking networks facilitating energy dissipation.
Conclusions:
- The MSC strategy offers a promising method for designing advanced materials with superior mechanical properties.
- Low addition (<1.0 wt %) of synergic metal ions as ion-bonding cross-linkers effectively improves material performance.
- The study elucidates the mechanism behind MSC-induced mechanical enhancement through complex cross-linking networks.
