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首页> 外文期刊>Journal of Applied Polymer Science >Production of bacterial nanobiocomposites of polyhydroxyalkanoates derived from waste and bacterial nanocellulose by the electrospinning enabling melt compounding method
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Production of bacterial nanobiocomposites of polyhydroxyalkanoates derived from waste and bacterial nanocellulose by the electrospinning enabling melt compounding method

机译：通过静电纺丝使熔融复合法生产源自废物和细菌纳米纤维素的聚羟基链烷酸酯的细菌纳米生物复合材料

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摘要

This work reports on the characterization of nanocomposites fully synthesized by bacteria, consisting of polyhydroxybutyrate-co-hydroxyvalerate (PHBV) matrices reinforced with bacterial cellulose nanowhiskers (BCNW). Two PHBV grades, with 9% HV (PHBV9) and 16% HV (PHBV16), were synthesized using food industry waste feedstocks and compared with a 3% HV commercial grade (PHBV3). Whereas PHBV3 presented a high barrier performance but excessive brittleness, PHBV9 and PHBV16 showed a more ductile behavior and reduced barrier properties. Subsequently, BCNW were incorporated into the PHBVs by a high-throughput electrospinning technique to produce master-batch formulations with relatively high nanofiller concentrations. The hybrid ultrathin fibers showed homogeneous morphologies and greater thermal stability than the pure PHBV fibers. Nanocomposites were then produced by melt mixing PHBVs with the hybrid fibers. Despite the low compatibility between the extremely hydrophilic BCNW and the hydrophobic PHBVs, the nanofiller was highly dispersed and provided a reduction in oxygen permeability of the PHBV3 matrix without relevant modifications in mechanical performance. (C) 2015 Wiley Periodicals, Inc.
机译：这项工作报告了由细菌完全合成的纳米复合材料的表征，包括由细菌纤维素纳米晶须（BCNW）增强的聚羟基丁酸酯-共-羟基戊酸酯（PHBV）基质。使用食品工业废料合成了两种具有9％HV（PHBV9）和16％HV（PHBV16）的PHBV级，并与3％HV商业级（PHBV3）进行了比较。 PHBV3表现出较高的阻隔性能，但脆性过大，而PHBV9和PHBV16则表现出更大的延展性和降低的阻隔性能。随后，通过高通量电纺丝技术将BCNW掺入PHBV中，以生产具有相对较高的纳米填料浓度的母料配方。杂化超细纤维比纯PHBV纤维具有均匀的形貌和更高的热稳定性。然后通过将PHBV与杂化纤维熔融混合来生产纳米复合材料。尽管极亲水的BCNW和疏水的PHBV之间的相容性很低，但纳米填料却高度分散，并降低了PHBV3基质的透氧性，而机械性能没有相关的改变。 （C）2015年Wiley Periodicals，Inc.

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