Self-healing and super-elastomeric polyMEA-co-SMA nanocomposites crosslinked by clay platelets

0562761 - ÚMCH 2023 RIV CH eng J - Článek v odborném periodiku
Strachota, Beata - Strachota, Adam - Byś, Katarzyna - Pavlova, Ewa - Hodan, Jiří - Mossety-Leszczak, B.
Self-healing and super-elastomeric polyMEA-co-SMA nanocomposites crosslinked by clay platelets.
Gels. Roč. 8, č. 10 (2022), č. článku 657. E-ISSN 2310-2861
Grant ostatní: AV ČR(CZ) ASRT-22-01
Program: Bilaterální spolupráce
Institucionální podpora: RVO:61389013
Klíčová slova: nanocomposites * super-elastomers * self-healing
Obor OECD: Polymer science
Impakt faktor: 4.6, rok: 2022
Způsob publikování: Open access
https://www.mdpi.com/2310-2861/8/10/657

Novel solvent-free ultra-extensible, tough, and self-healing nanocomposite elastomers were synthesized. The self-assembled materials were based on the copolymer matrix poly(methoxyethyl acrylate-co-sodium methacrylate) physically crosslinked by clay nano-platelets (‘poly[MEA-co-SMA]/clay’). Depending on the content of SMA, the super-elastomers were predominantly hydrophobic, water-swelling, or fully water-soluble, and hence repeatedly processible. The SMA co-monomer introduces a tremendous increase in tensile strength, an increase in toughness, while ultra-extensibility is preserved. By tuning the contents of nano-clay and SMA co-monomer, a very wide range of product properties was achieved, including extreme ultra-extensibility, or high stiffness combined with more moderate super-extensibility, or very different values of tensile strength. There was very attractive, great improvement in autonomous self-healing ability induced by SMA, combined with tremendously enhanced self-recovery of internal mechanical damage: even complete self-recovery could be achieved. The ionic SMA repeat units were found to assemble to multiplets, which are phase-separated in the hydrophobic polyMEA matrix. The dynamics of SMA-units-hopping between these aggregates was of key importance for the mechanical, visco-elastic, tensile, and self-healing properties. The studied super-elastomers are attractive as advanced self-healing materials in engineering, soft robotics, and in medical or implant applications.
Trvalý link: https://hdl.handle.net/11104/0335339