Review of the Developments of Bacterial Medium-Chain-Length Polyhydroxyalkanoates (mcl-PHAs)
Overview
Affiliations
Synthetic plastics derived from fossil fuels-such as polyethylene, polypropylene, polyvinyl chloride, and polystyrene-are non-degradable. A large amount of plastic waste enters landfills and pollutes the environment. Hence, there is an urgent need to produce biodegradable plastics such as polyhydroxyalkanoates (PHAs). PHAs have garnered increasing interest as replaceable materials to conventional plastics due to their broad applicability in various purposes such as food packaging, agriculture, tissue-engineering scaffolds, and drug delivery. Based on the chain length of 3-hydroxyalkanoate repeat units, there are three types PHAs, i.e., short-chain-length (scl-PHAs, 4 to 5 carbon atoms), medium-chain-length (mcl-PHAs, 6 to 14 carbon atoms), and long-chain-length (lcl-PHAs, more than 14 carbon atoms). Previous reviews discussed the recent developments in scl-PHAs, but there are limited reviews specifically focused on the developments of mcl-PHAs. Hence, this review focused on the mcl-PHA production, using various carbon (organic/inorganic) sources and at different operation modes (continuous, batch, fed-batch, and high-cell density). This review also focused on recent developments on extraction methods of mcl-PHAs (solvent, non-solvent, enzymatic, ultrasound); physical/thermal properties (Mw, Mn, PDI, Tm, Tg, and crystallinity); applications in various fields; and their production at pilot and industrial scales in Asia, Europe, North America, and South America.
Pandey V, Shafi Z, Tripathi A, Singh G, Singh R, Rustagi S Curr Res Microb Sci. 2024; 7:100292.
PMID: 39497936 PMC: 11533516. DOI: 10.1016/j.crmicr.2024.100292.
Lalonde J, Pilania G, Marrone B Polym Chem. 2024; 16(3):235-265.
PMID: 39464417 PMC: 11498330. DOI: 10.1039/d4py00623b.
A Review of Polyhydroxyalkanoates: Characterization, Production, and Application from Waste.
Getino L, Martin J, Chamizo-Ampudia A Microorganisms. 2024; 12(10).
PMID: 39458337 PMC: 11510099. DOI: 10.3390/microorganisms12102028.
Topography hierarchy of biocompatible polyhydroxyalkanoate film.
Ghorabe F, Aglikov A, Novikov A, Nosonovsky M, Ryltseva G, Dudaev A RSC Adv. 2024; 14(27):19603-19611.
PMID: 38895528 PMC: 11184939. DOI: 10.1039/d4ra03398a.
Hahn T, Alzate M, Leonhardt S, Tamang P, Zibek S Eng Life Sci. 2024; 24(6):2300211.
PMID: 38845815 PMC: 11151071. DOI: 10.1002/elsc.202300211.