Due to their biodegradability, biocompatibility and sustainable nature, regenerated cellulose (RC) films are of enormous relevance for green applications including medicinal, environmental and separation technologies. However, the processes used so far are very hazardous to the environment and health. Here, we disclose a simple, fast, environmentally friendly, nontoxic and cost-effective processing method for preparing RC films. High quality non-transparent and transparent RC films and powders can be produced by dissolution with tetrabutylphosphonium hydroxide [TBPH]/[TBP]⁺[OH]⁻ followed by coagulation with organic carbonates. Investigations on the coagulation mechanism revealed an extremely fast reaction between the carbonates and the hydroxide ions. The high-quality powders and films were fully characterized with respect to structure, surface morphology, permeation and selectivity. This method represents a future-oriented green alternative to known industrial processes.

由于其可生物降解性、生物相容性和可持续性，再生纤维素 (RC) 薄膜与绿色应用（包括医药、环境和分离技术）具有巨大的相关性。然而，迄今为止使用的工艺对环境和健康非常有害。在这里，我们公开了一种简单、快速、环保、无毒且具有成本效益的制备 RC 薄膜的加工方法。高质量的不透明和透明RC薄膜和粉末可以通过与氢氧化四丁基磷溶解[TBPH]/[TBP] ⁺ [OH] ⁻然后与有机碳酸盐混凝。对凝结机制的研究揭示了碳酸盐和氢氧根离子之间的极快反应。高质量的粉末和薄膜在结构、表面形态、渗透和选择性方面得到了充分表征。这种方法代表了已知工业过程的面向未来的绿色替代方案。