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Constructing Self-Healing Polydimethylsiloxane through Molecular Structure Design and Metal Ion Bonding.
- Source :
- Polymers (20734360); May2024, Vol. 16 Issue 10, p1309, 13p
- Publication Year :
- 2024
-
Abstract
- Self-healing polydimethylsiloxane (PDMS) has garnered significant attention due to its potential applications across various fields. In this study, a functionalized modification of PDMS containing di-aminos was initially conducted using 2,6-pyridinedicarbonyl chloride to synthesize pyridine-PDMS (Py-PDMS). Subsequently, rare earth metal europium ions (Eu<superscript>3+</superscript>) were incorporated into Py-PDMS. Due to the coordination interaction between Eu<superscript>3+</superscript> and organic ligands, a coordination cross-linking network was created within the Py-PDMS matrix, resulting in the fabrication of Eu<superscript>3+</superscript>-Py-PDMS elastomer. At a molar ratio of Eu<superscript>3+</superscript> to ligands of 1:1, the tensile strength of Eu<superscript>3+</superscript>-Py-PDMS reached 1.4 MPa, with a fracture elongation of 824%. Due to the dynamic reversibility of coordination bonds, Eu<superscript>3+</superscript>-Py-PDMS with a metal-to-ligand molar ratio of 1:2 exhibited varying self-healing efficiencies at different temperatures. Notably, after 4 h of repair at 60 °C, its self-healing efficiency reached nearly 100%. Furthermore, the gas barrier properties of Eu<superscript>3+</superscript>-Py-PDMS with a molar ratio of 1:1 was improved compared with that of Eu<superscript>3+</superscript>-Py-PDMS with a molar ratio of 1:1. This study provides an effective strategy for the design and fabrication of PDMS with high mechanical strength, high gas barrier properties, and exceptional self-healing efficiency. [ABSTRACT FROM AUTHOR]
- Subjects :
- METAL bonding
MOLECULAR structure
METAL ions
RARE earth metals
POLYDIMETHYLSILOXANE
Subjects
Details
- Language :
- English
- ISSN :
- 20734360
- Volume :
- 16
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Polymers (20734360)
- Publication Type :
- Academic Journal
- Accession number :
- 177492162
- Full Text :
- https://doi.org/10.3390/polym16101309