Abstract Compared with plant-derived cellulose, developing biocellulose nanofibers (bio-CNFs) as a functional membrane material is of great interest in membrane filtration for the effective separation of emulsified oily wastewater due to its low cost, renewability, high water-holding capacity and anti-oil-fouling properties. In this work, a bio-CNF membrane was produced by cultured Gluconacetobacter xylinus through a simple biosynthetic process followed by a purification step involving alkali treatment. Herein, the bio-CNF membrane treated with 0.75 M NaOH solution formed a unique, porous nanonetwork structure with good hydrophilicity and ultralow-oil-adhesion properties, and this was successfully applied for the separation of surfactant-stabilized oil/water emulsions. The superhydrophilic and superoleophobic bio-CNF membranes exhibited superior performance for separating surfactant-stabilized oil/water emulsions, showing a separation efficiency of ~99% and a high permeate flux recovery ratio (above 94%) for long-term separation processes.

中文翻译：

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Gluconacetobacter xylinus 合成具有超亲水和超疏油水下特性的生物纤维素纳米纤维膜，用于油/水乳液的高效分离

摘要 与植物来源的纤维素相比，开发生物纤维素纳米纤维（bio-CNFs）作为一种功能性膜材料，由于其低成本、可再生、高持水能力和高保水能力，在膜过滤有效分离乳化含油废水方面具有重要意义。防油污性能。在这项工作中，通过简单的生物合成过程和碱处理的纯化步骤，通过培养的 Gluconacetobacter xylinus 生产生物 CNF 膜。在此，生物 CNF 膜经 0.75 M NaOH 溶液处理形成了独特的多孔纳米网络结构，具有良好的亲水性和超低油粘附性能，并成功应用于表面活性剂稳定的油/水乳液的分离。