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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Production of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) using agro-industrial effluents with tunable proportion of 3-hydroxyvalerate monomer units
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Production of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) using agro-industrial effluents with tunable proportion of 3-hydroxyvalerate monomer units

机译：利用农业工业污水生产聚（3-羟基丁酸酯-CO-3-羟基羟基戊烯，具有3-羟基戊单体单元的可调比例

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With increasing concerns about future oil depletion and plastic pollution, bioplastics saw an increasing interest from scientists and industrials. Among bioplastics, the polyhydroxyalkanoates (PHA) are a promising family of polyester which are both biosourced and biodegradable. Biosynthesized by microorganisms, especially bacteria, control of their monomeric composition, and thus their thermal and mechanical properties, is still a challenge to really make tailor-made syntheses. Moreover, one way to decrease the high cost of production is to use waste as substrates for the microorganisms. In this study, a marine bacteria, Halomonas sp. SF2003 was grown on agroindustrial effluents as the sole carbon sources and was able to produce poly(3-hydroxybutyrate) (PHB) with a productivity of 13 g.L-1 in 40 h of culture and a number-average molar weight of 342,000 g.mol(-1). With the addition of valeric acid in the substrates, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBHV) with controlled proportion of hydroxyvalerate (HV) monomers were obtained. Their thermal and mechanical characteristics were investigated as a function of HV amount and showed a decrease of the glass transition and melting temperatures and in Young modulus with the HV content increase. (C) 2019 Elsevier B.V. All rights reserved.
机译：随着对未来石油消耗和塑料污染的越来越越来越担心，Bioplastics从科学家和工业造成了越来越多的兴趣。在生物塑料中，聚羟基烷烷（PHA）是一家有前途的聚酯家族，这些聚酯是生物波索和可生物降解。通过微生物，尤其是细菌，它们的单体组合物的控制，以及它们的热和机械性能，仍然是真正使量身定制的合成的挑战。此外，减少高生产成本的一种方法是将废物用作微生物的底物。在这项研究中，海洋细菌，卤代乳菌。 SF2003在农业工业污水中生长为唯一的碳源，并且能够在40小时内生产聚（3-羟丁酸酯）（PHB），其生产率为40小时，培养数为342,000g.Mol的数均等（-1）。通过在底物中加入valeric酸，获得具有受控比例的羟基戊羟苯甲酸盐（HV）单体的聚（3-羟基丁酸酯-CO-3-羟基羟基戊烯）（PHBHV）。作为HV量的函数研究了它们的热和机械特性，并且玻璃化转变和熔化温度和较年轻模量的函数进行了调查，并且随着HV含量的增加而降低。 （c）2019 Elsevier B.v.保留所有权利。

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