Poly(3-hydroxybutyrate) nanocomposites modified with even and odd chain length polyhydroxyalkanoates.

Autor: Panaitescu DM; National Institute for Research & Development in Chemistry and Petrochemistry - ICECHIM, 202 Splaiul Independentei, 060021 Bucharest, Romania. Electronic address: panaitescu@icechim.ro., Frone AN; National Institute for Research & Development in Chemistry and Petrochemistry - ICECHIM, 202 Splaiul Independentei, 060021 Bucharest, Romania. Electronic address: adriana.frone@icechim.ro., Nicolae CA; National Institute for Research & Development in Chemistry and Petrochemistry - ICECHIM, 202 Splaiul Independentei, 060021 Bucharest, Romania., Gabor AR; National Institute for Research & Development in Chemistry and Petrochemistry - ICECHIM, 202 Splaiul Independentei, 060021 Bucharest, Romania., Miu DM; National Institute for Chemical Pharmaceutical Research and Development, 112 Calea Vitan, 031299 Bucharest, Romania., Soare MG; National Institute for Chemical Pharmaceutical Research and Development, 112 Calea Vitan, 031299 Bucharest, Romania., Vasile BS; National Research Centre for Micro and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University POLITEHNICA of Bucharest, 060042 Bucharest, Romania., Lupescu I; National Institute for Chemical Pharmaceutical Research and Development, 112 Calea Vitan, 031299 Bucharest, Romania; Department of Veterinary Medicine, Spiru Haret University, 256 Bulevardul Basarabia, 030352 Bucharest, Romania.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2023 Jul 31; Vol. 244, pp. 125324. Date of Electronic Publication: 2023 Jun 10.
DOI: 10.1016/j.ijbiomac.2023.125324
Abstrakt: Poly(3-hydroxybutyrate) (PHB) was blended with medium-chain-length PHAs (mcl-PHAs) for improving its flexibility while nanocellulose (NC) was added as a reinforcing agent. Even and odd-chain-length PHAs, having as main component poly(3-hydroxyoctanoate) (PHO) or poly(3-hydroxynonanoate) (PHN) were synthesized and served as PHB modifiers. The effects of PHO and PHN on the morphology, thermal, mechanical and biodegradation behaviors of PHB were different, especially in the presence of NC. The addition of mcl-PHAs decreased the storage modulus (E') of PHB blends by about 40 %. The further addition of NC mitigated this decrease bringing the E' of PHB/PHO/NC close to that of PHB and having a minor effect on the E' of PHB/PHN/NC. The biodegradability of PHB/PHN/NC was higher than that of PHB/PHO/NC, the latter's being close to that of neat PHB after soil burial for four months. The results showed a complex effect of NC, which enhanced the interaction between PHB and mcl-PHAs and decreased the size of PHO/PHN inclusions (1.9 ± 0.8/2.6 ± 0.9 μm) while increasing the accessibility of water and microorganisms during soil burial. The blown film extrusion test showed the ability of mcl-PHA and NC modified PHB to stretch forming uniform tube and supports the application of these biomaterials in the packaging sector.
Competing Interests: Declaration of competing interest The authors declare no conflict of interest.
(Copyright © 2023. Published by Elsevier B.V.)
Databáze: MEDLINE
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