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首页> 外文期刊>Materials science & engineering >In situ biosynthesis of bacterial nanocellulose-CaCO_3 hybrid bionanocomposite: One-step process
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In situ biosynthesis of bacterial nanocellulose-CaCO_3 hybrid bionanocomposite: One-step process

机译：细菌纳米纤维素-CaCO_3杂化纳米复合材料的原位生物合成：一步法

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摘要

In this work, a simple and green route to the synthesis of the bacterial nanocellulose-calcium carbonate (BNC/CaCO_3) hybrid bionanocomposites using one-step in situ biosynthesis was studied. The CaCO_3 was incorporated in the bacterial nanocellulose structure during the cellulose biosynthesis by Ghiconacetobacterxylinus PTCC 1734 bacteria. Hestrin-Schramm (HS) and Zhou (Z) culture media were used to the hybrid bionanocomposites production and the effect of ethanol addition was investigated. Attenuated total reflection Fourier transform infrared spectroscopy, field emission scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, inverse gas chromatography and thermogravimetric analysis were used to characterize the samples. The experimental results demonstrated that the ethanol and culture medium play an important role in the BNC/CaCO_3 hybrid bionanocomposites production, structure and properties. The BNC/CaCO_3 biosynthesized in Z culture medium revealed higher O/C ratio and amphoteric surface character, which justify the highest CaCO_3 content incorporation. The CaCO_3 was incorporated into the cellulosic matrix decreasing the bacterial nanocellulose crystallinity. This work reveals the high potential of in situ biosynthesis of BNC/CaCO_3 hybrid bionanocomposites and opens a new way to the high value-added applications of bacterial nanocellulose.
机译：在这项工作中，研究了一种简单且绿色的途径，即使用一步原位生物合成法合成细菌纳米纤维素-碳酸钙（BNC / CaCO_3）杂合纳米复合材料。在细菌Ghiconacetobacterxylinus PTCC 1734细菌生物合成纤维素的过程中，将CaCO_3掺入细菌纳米纤维素结构中。用Hestrin-Schramm（HS）和Zhou（Z）培养基生产杂化纳米复合材料，并研究了乙醇添加的影响。使用衰减全反射傅立叶变换红外光谱，场发射扫描电子显微镜，X射线衍射，能量色散X射线光谱，反相气相色谱和热重分析来表征样品。实验结果表明，乙醇和培养基在BNC / CaCO_3杂化纳米复合材料的生产，结构和性能中起着重要作用。在Z培养基中生物合成的BNC / CaCO_3表现出更高的O / C比和两性表面特征，这证明了最高的CaCO_3掺入量是合理的。将CaCO_3掺入纤维素基质中，降低细菌纳米纤维素的结晶度。这项工作揭示了BNC / CaCO_3杂合纳米复合材料原位生物合成的巨大潜力，并为细菌纳米纤维素的高附加值应用开辟了新途径。

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