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首页> 外文期刊>Polymers for advanced technologies >Processing-structure-property relationships of biopolyester/zinc oxide fibrous scaffolds engineered by centrifugal spinning
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Processing-structure-property relationships of biopolyester/zinc oxide fibrous scaffolds engineered by centrifugal spinning

机译：通过离心纺丝工程的肉氨基酯/氧化锌纤维支架的加工 - 结构性质关系

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摘要

This study addresses the processing of nonwoven fibrous materials obtained by centrifugal spinning method, namely Forcespinning; a high yield and low production cost technique little explored in this field. Poly(D, L-lactic acid) (PDLLA) and poly(3-hydroxybutyrate) (PHB) were used as matrices and reinforced with zinc oxide nanoparticles (n-ZnO). The morphology, mechanical, and thermal performance of the developed composites were analyzed as well as the antibacterial effect of n-ZnO. Fibrous materials with n-ZnO concentrations of 1, 3, and 5 wt. % for PDLLA and 1 and 3 wt. % for PHB were evaluated. The results showed that the incorporation of n-ZnO produces an increase in the viscosity of the precursor solutions for both polymeric systems, which caused an increase in the average fiber diameter, though the morphology was not affected, obtaining mostly long, continuous, and homogenous fibers. In addition, a decrease in thermal stability was observed to a greater extent in PDLLA systems. Regarding the mechanical performance, optimal properties were obtained at a concentration of 3 and 1 wt. % of n-ZnO for PDLLA and PHB, respectively. Antibacterial studies showed that PHB with 1 and 3 wt. % of n-ZnO effectively combat strains ofE. coliandS. aureus, presenting 100% of strain growth inhibition. In the case of PDLLA, a higher n-ZnO concentration (5 wt. %) was required to reach a strain growth inhibition above 97%. Finally, cell viability tests demonstrated that the designed fibrous mats support cell proliferation, indicating their potential for use as scaffolds in bone tissue regeneration.
机译：本研究涉及通过离心纺丝方法获得的非织造纤维材料的加工，即强制纺丝；高产低成本技术在该领域的研究较少。以聚D，L-乳酸（PDLLA）和聚3-羟基丁酸酯（PHB）为基体，用纳米氧化锌（n-ZnO）增强。分析了所制备复合材料的形貌、力学性能和热性能，以及n-ZnO的抗菌效果。对n-ZnO浓度为1、3和5 wt.%的PDLLA纤维材料和1和3 wt.%的PHB纤维材料进行了评估。结果表明，n-ZnO的加入增加了两种聚合物体系前驱体溶液的粘度，导致平均纤维直径增加，但形态没有受到影响，获得的纤维大多较长、连续且均匀。此外，在PDLLA系统中，热稳定性的降低程度更大。在机械性能方面，当n-ZnO的质量分数分别为3%和1%时，PDLLA和PHB的性能最佳。抗菌研究表明，含有1%和3%重量的n-ZnO的PHB能有效对抗E菌株。科林斯。金黄色葡萄球菌，呈现100%的菌株生长抑制。在PDLLA的情况下，需要更高的n-ZnO浓度（5 wt.%）才能达到97%以上的菌株生长抑制率。最后，细胞活力测试表明，所设计的纤维垫支持细胞增殖，表明其作为骨组织再生支架的潜力。

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