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Nanohybrid Self-Healing Microcapsules with NO2-LDHs/ZIF-8 Shell: Synergistic Corrosion Protection and Enhanced CO2
Jielu Zhu1, Yanni Lu1, Bingzhi Xiang1
1Research Center of Advanced Materials and Green Energy, Jiangxi Institute of Technology, Nanchang, Jiangxi 330098, PR China.
ACS Applied Materials & Interfaces
|June 9, 2026
Summary
This study introduces novel nanohybrid self-healing microcapsules containing NO2-LDHs and ZIF-8 for enhanced cement performance. These microcapsules improve CO2 capture and corrosion resistance in cementitious materials.
Area of Science:
- Materials Science
- Nanotechnology
- Civil Engineering
Background:
- Functional materials like layered double hydroxides (LDHs) and zeolitic imidazolate frameworks (ZIFs) show promise for improving cement-based materials.
- Existing materials face challenges in promoting cement hydration, self-healing microcracks, CO2 capture, and corrosion protection.
Purpose of the Study:
- To develop and evaluate nanohybrid self-healing microcapsules incorporating NO2-LDHs and ZIF-8 for advanced cementitious materials.
- To investigate the CO2 capture capacity and corrosion protection performance of these novel microcapsules.
Main Methods:
- Synthesis of nanohybrid self-healing microcapsules containing NO2-LDHs and ZIF-8.
- Characterization of microcapsule dispersibility, shell size, and structural integrity.
- Measurement of CO2 capture capacities at various conditions.
- Evaluation of corrosion protection efficiency using electrochemical methods.
Main Results:
- Microcapsules exhibited excellent dispersibility with an average shell size of 5.26 μm.
- CO2 capture capacities were 1.634 cm³/g for microcapsules (MC), 1.913 cm³/g for LDH/ZIF-MCs, and 2.325 cm³/g for ZIF-MCs.
- LDH/ZIF-MCs demonstrated a high corrosion protection efficiency of 98.82% after 9 days.
- A synergistic force/Cl- triggering mechanism was observed, enhancing environmental adaptability.
Conclusions:
- Nanohybrid microcapsules offer a sustainable approach for enhancing cement-based materials.
- The developed system provides synergistic self-healing, CO2 capture, and corrosion protection.
- This technology is suitable for environments with combined chlorine and carbon corrosion challenges.
