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Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces
Published on: September 11, 2018
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Nanosheet-Filled Polymer Film from Flow-Induced Coassembly: Multiscale Structure Visualization and Application
Ning Xue1, Jian Yao1, Caihong Shi1
1State Key Laboratory of Chemical Resource Engineering , Beijing University of Chemical Technology , Beijing 100029 , China.
Langmuir : the ACS Journal of Surfaces and Colloids
|November 2, 2018
Summary
This study introduces advanced nanoplatelet-filled polymer composites (NFPCs) using flow-induced assembly for enhanced properties. The resulting films offer direct visualization for sensing applications, improving material performance and functionality.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Nanoplatelet-filled polymer composites (NFPCs) offer high strength-to-weight ratio and toughness.
- Challenges include transferring nanoplatelet performance to bulk materials, ensuring strong interfacial bonding, and characterizing NFPC film structure.
Purpose of the Study:
- To develop a method for fabricating large-size, continuous, flexible, highly oriented, and transparent NFPC films.
- To enhance interfacial bonding using layered double hydroxide (LDH) nanosheets.
- To introduce carbon dots (CDs) for multiscale structure analysis and sensing capabilities.
Main Methods:
- Flow-induced assembly for coassembling nanoplatelets and polymers into highly ordered layered structures.
- Preparation of single-layer LDH nanosheets with abundant hydroxyl sites for hydrogen bonding with polymers.
- Incorporation of carbon dots (CDs) within the LDH-polymer matrix to create a dual-emission system.
Main Results:
- Fabrication of large-size, continuous, flexible, highly oriented, and transparent NFPC films with a highly ordered layered structure.
- Enhanced interface bonding achieved through hydrogen bonds between LDH nanosheets and polymers.
- CD-LDH-based composite films exhibited dual emission, enabling direct visualization for evaluating gas barrier, humidity, and temperature with high sensitivity.
Conclusions:
- Flow-induced assembly is effective for creating high-performance NFPC films with ordered structures.
- LDH nanosheets significantly improve interfacial adhesion.
- The developed CD-LDH composite films serve as sensitive, visual sensors for environmental parameters.
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