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首页> 外文期刊>Journal of Polymers and the Environment >Morphology of Penicillium funiculosum During Biodegradation of Poly (β-hydroxybutyrate-co-β-hydroxyvalerate) [PHBV] with Poly (ε-Caprolactone) [PCL] Blends
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Morphology of Penicillium funiculosum During Biodegradation of Poly (β-hydroxybutyrate-co-β-hydroxyvalerate) [PHBV] with Poly (ε-Caprolactone) [PCL] Blends

机译：聚（ε-己内酯）[PCL]共混物对聚（β-羟基丁酸酯-共-β-羟基戊酸酯）[PHBV]的生物降解过程中，青霉菌的形态

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摘要

Blends of poly (β-hydroxybutyrate-co-β-hydroxy valerate) with poly (ε-caprolactone) were produced using melt mixing and solvent casting techniques. The biodegradation of blends was tested based in the ASTM G21-90 using Penicillium funiculosum fungal specie. The CO_2 production during biodegradation was measured and fitted using the Gompertz model. Biodegradation of blends varies according to the mixing technique and the propor tion of bacterial polymers in the blends. Although lag phase was larger, solvent-casted blends were easier to degrade due to their porous surface and relative lower crystallinity. P. funiculosum morphology during biodegra dation appeared to be related to carbon availability i.e. larger and more complex conidiophores, more phialides per conidiophore and the presence of double-phialides, were found in blends with higher PHAs proportion. P. funicu losum morphology was independent to the blending tech nique used. Hence, morphology of P. funiculosum could be useful as a reference for carbon bioavailability of the blends.
机译：使用熔融混合和溶剂流延技术生产聚（β-羟基丁酸酯-共-β-羟基戊酸酯）与聚（ε-己内酯）的共混物。基于ASTM G21-90，使用青霉菌真菌物种对掺合物的生物降解进行了测试。使用Gompertz模型测量并拟合了生物降解过程中的CO_2产量。共混物的生物降解取决于混合技术和共混物中细菌聚合物的比例。尽管滞后相较大，但溶剂浇铸的共混物由于其多孔表面和相对较低的结晶度而更易于降解。在生物降解过程中，P。funiculosum形态似乎与碳的利用有关，即，在具有较高PHAs比例的混合物中发现更大，更复杂的分生孢子，每个分生孢子有更多的phialides和存在双phialides。 P. funicu losum形态独立于所使用的混合技术。因此，P。funiculosum的形态可以作为共混物碳生物利用度的参考。

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