气候变化领域集成服务门户(CCPortal): Review of recent advances in the biodegradability of polyhydroxyalkanoate (PHA) bioplastics and their composites

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DOI	10.1039/d0gc01647k
	Review of recent advances in the biodegradability of polyhydroxyalkanoate (PHA) bioplastics and their composites
	Meereboer K.W.; Misra M.; Mohanty A.K.
发表日期	2020
ISSN	14639262
起始页码	5519
结束页码	5558
卷号	22 期号:17
英文摘要	The detrimental impact of single-use plastics on the environment is daily news across the globe. Single-use plastic packaging materials and other plastic waste originating from petroleum-based sources are continuously building up in landfills and leaching into the environment. Managing plastic waste remains an urgent crisis in the environment and switching to biodegradable plastics can help mitigate some of these issues. This review will summarize recent advances and opportunities to utilize polyhydroxyalkanoates (PHAs) as a biodegradable substitute in some applications where non-biodegradable and petroleum-based plastics are currently used. PHAs are a well-known family of bacteria-based biodegradable plastics and offer an approach to carbon neutrality and support a more sustainable industry. PHAs such as poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) show biodegradable behaviour in all aerobic and anaerobic environments defined by ASTM standards, and can be used to make completely compostable, and soil and marine biodegradable products-a strong positive compared to the negativity associated with the landfilling of plastics. However, PHAs are relatively expensive compared to petroleum-based alternatives. To reduce the cost, PHAs can be used in biocomposite materials, where bio-based agro-residues are incorporated, while maintaining the performance in certain applications. Organic fillers and fibres composed of cellulosic material can improve the properties of polymers, however, their effect on the marine biodegradable properties of the composite matrix remains an unexplored area. When used in biocomposites with PHAs, they improve biodegradation rates in all environments. In addition to cellulose, other bio-based fillers such as proteins (i.e. distillers dried grains with solubles) and starch have been reported to significantly improve soil and marine biodegradability rates compared to other fibres and fillers. Other components that affect biodegradability are additives (i.e. chain extenders) and compatibilizers (i.e. maleic anhydride etc.) that are added to optimize the service life properties, but are reported to inhibit the biodegradation properties by impacting the hydrophilicity of the polymer and enzyme activity. The multitude of possible combinations of polymers and fillers and fibres, and their effect on the biodegradation of PHA-based biocomposites are a largely unexplored frontier. The potential benefits of PHA-based biocomposites make a strong case for further research into this area. © The Royal Society of Chemistry.
scopus关键词	Additives; ASTM standards; Biodegradability; Biodegradation; Elastomers; Enzyme activity; Fillers; Gasoline; Hydrophilicity; Packaging materials; Plastic building materials; Plastic products; Plastics applications; Plastics industry; Polymer matrix composites; Biocomposite materials; Biodegradable plastics; Biodegradable products; Distillers dried grains with solubles; Plastic packaging materials; Poly(3-hydroxybutyrate); Poly(3-hydroxybutyrate-co-3-hydroxyvalerate); Sustainable industries; Biodegradable polymers; Additives; Biodegradability; Biodegradation; Elastomers; Fillers; Gasoline; Water; Wettability
来源期刊	Green Chemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176604
作者单位	School of Engineering, Thornbrough Building, University of Guelph, 50 Stone Road East, Guelph, ON, Canada; Bioproducts Discovery and Development Centre, Department of Plant Agriculture, University of Guelph, 50 Stone Road East, Guelph, ON, Canada
推荐引用方式 GB/T 7714	Meereboer K.W.,Misra M.,Mohanty A.K.. Review of recent advances in the biodegradability of polyhydroxyalkanoate (PHA) bioplastics and their composites[J],2020,22(17).
APA	Meereboer K.W.,Misra M.,&Mohanty A.K..(2020).Review of recent advances in the biodegradability of polyhydroxyalkanoate (PHA) bioplastics and their composites.Green Chemistry,22(17).
MLA	Meereboer K.W.,et al."Review of recent advances in the biodegradability of polyhydroxyalkanoate (PHA) bioplastics and their composites".Green Chemistry 22.17(2020).