In this study, the abundant global textile waste old nylon-6,6 was utilized as a substrate for bacterial cellulose (BC) production by Taonella mepensis WT-6. Briefly, different ratios (dry matter/v, 2.5%, 5%, 10%, or 15%) of nylon-6,6 waste were treated with 15% sulfuric acid for 2, 4, and 6 h, termed as nylon-6,6 acid hydrolysate (NAH). The highest depolymerization efficiency of nylon-6,6 waste was found to be 99.1% at 10% nylon-6,6 after 4 h of acid hydrolysis and released the maximum hexamethylenediamine (HMD), which resulted in a nearly complete degradation of nylon-6,6 to HMD, which was then converted to BC by T. mepensis. The structure and properties of BC films produced from Hestrin and Schramm medium (BC-HS) and nylon-6,6 acid hydrolysate (BC-NAH) media were comparatively studied by Fourier transform infrared spectroscopy (FTIR), mechanical properties, thermogravimetric analysis (TGA), X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and hydrophilicity analysis. The results demonstrated that the structural features of BC-NAH were comparable to BC-HS, suggesting that nylon-6,6 waste could be used as an inexpensive substrate for the cost-effective industrial production of BC.

中文翻译：

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尼龙 6,6 水解物生物转化为细菌纤维素

在这项研究中，丰富的全球纺织废料旧尼龙 6,6 被用作Taonella mepensis WT-6生产细菌纤维素 (BC) 的底物。简而言之，将不同比例（干物质/v、2.5%、5%、10% 或 15%）的尼龙 6,6 废料用 15% 的硫酸处理 2、4 和 6 小时，称为尼龙- 6,6 酸水解物 (NAH)。发现尼龙 6,6 废料的最高解聚效率在 10% 的尼龙 6,6 酸水解 4 小时后达到 99.1% 并释放最大的六亚甲基二胺 (HMD)，这导致尼龙几乎完全降解。 6,6 转换为 HMD，然后由T. mepensis转换为 BC. 通过傅里叶变换红外光谱(FTIR)、力学性能、热重分析比较研究了由Hestrin和Schramm介质(BC-HS)和尼龙6,6酸水解物(BC-NAH)介质制备的BC薄膜的结构和性能。 TGA)、X 射线衍射 (XRD)、场发射扫描电子显微镜 (FE-SEM) 和亲水性分析。结果表明，BC-NAH 的结构特征与 BC-HS 相当，这表明尼龙 6,6 废料可用作低成本的 BC 工业生产的廉价基材。