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Interfacial Engineering with Rigid Nanoplatelets in Immiscible Polymer Blends: Interface Strengthening and
Lingmin Hu1, Yuanyuan Han2, Chenyan Rong1
1College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China.
ACS Applied Materials & Interfaces
|February 16, 2022
Summary
Surface-modified rigid nanoplatelets improve immiscible polymer blends by enhancing interfacial adhesion and mechanical properties. This strategy offers new possibilities for advanced polymer nanocomposites.
Area of Science:
- Polymer Science
- Materials Science
- Nanotechnology
Background:
- Interfacial nanoparticle compatibilization (INC) is key for polymer blends.
- Rigid nanoplatelets present challenges due to steric hindrance.
- Few studies explore INC with rigid nanoplatelets.
Purpose of the Study:
- To investigate surface-modified rigid nanoplatelets in immiscible polymer blends.
- To understand the mechanism of interfacial adhesion and morphology control.
- To enhance mechanical properties of poly(l-lactide)/poly(butylene succinate) blends.
Main Methods:
- Incorporation of surface-modified Gibbsite nanoplatelets into PLLA/PBSU blends.
- Analysis of interfacial adhesion via molecular entanglements.
- Evaluation of phase morphology and mechanical properties.
- Monte Carlo simulations to confirm the mechanism.
Main Results:
- Strong interfacial adhesion achieved through grafted chain entanglement.
- Improved mechanical properties with 5 wt% modified Gibbsite nanoplatelets.
- Nanoplatelet stiffness significantly alters interfacial geometry.
- Selective swelling/collapse of grafts controls interface and strengthens it.
Conclusions:
- Rigid nanoplatelets can simultaneously strengthen interfaces and control curvature.
- The mechanism involves selective graft behavior at the interface.
- This approach enables fabrication of advanced polymer blend nanocomposites.
