Effects of immobilized ionic liquid on properties of biodegradable polycaprolactone/LDH nanocomposites prepared by in situ polymerization and melt-blending techniques

0524350 - ÚMCH 2021 RIV CH eng J - Článek v odborném periodiku
Bujok, Sonia - Hodan, Jiří - Beneš, Hynek
Effects of immobilized ionic liquid on properties of biodegradable polycaprolactone/LDH nanocomposites prepared by in situ polymerization and melt-blending techniques.
Nanomaterials. Roč. 10, č. 5 (2020), s. 1-15, č. článku 969. E-ISSN 2079-4991
Grant CEP: GA MŠMT(CZ) LO1507
Institucionální podpora: RVO:61389013
Klíčová slova: polycaprolactone nanocomposites * layered double hydroxides * microwave-assisted polymerization
Obor OECD: Polymer science
Impakt faktor: 5.076, rok: 2020
Způsob publikování: Open access
https://www.mdpi.com/2079-4991/10/5/969

The high capacity of calcinated layered double hydroxides (LDH) to immobilize various active molecules together with their inherent gas/vapor impermeability make these nanoparticles highly promising to be applied as nanofillers for biodegradable polyester packaging. Herein, trihexyl(tetradecyl)phosphonium decanoate ionic liquid (IL) was immobilized on the surface of calcinated LDH. Thus, the synthesized nanoparticles were used for the preparation of polycaprolactone (PCL)/LDH nanocomposites. Two different methods of nanocomposite preparation were used and compared: microwave-assisted in situ ring opening polymerization (ROP) of ε-caprolactone (εCL) and melt-blending. The in situ ROP of εCL in the presence of LDH nanoparticles with the immobilized IL led to homogenous nanofiller dispersion in the PCL matrix promoting formation of large PCL crystallites, which resulted in the improved mechanical, thermal and gas/water vapor barrier properties of the final nanocomposite. The surface-bonded IL thus acted as nanofiller surfactant, compatibilizer, as well as thermal stabilizer of the PCL/LDH nanocomposites. Contrary to that, the melt-blending caused a partial degradation of the immobilized IL and led to the production of PCL nanocomposites with a heterogenous nanofiller dispersion having inferior mechanical and gas/water vapor barrier properties.
Trvalý link: http://hdl.handle.net/11104/0308958