Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, PR China.
Int J Biol Macromol. 2024 Jan;254(Pt 2):127844. doi: 10.1016/j.ijbiomac.2023.127844. Epub 2023 Nov 3.
To address the challenges posed by spilled oil and oily wastewater, the development of clean oil-adsorption materials is crucial. However, traditional oil-adsorption materials suffer from the issue of secondary pollution. Herein, fully biodegradable nanofibrillated poly(butylene succinate)/poly(lactic acid) (PBS/PLA) foams with outstanding selective oil-adsorption performance were successfully fabricated via an eco-friendly supercritical CO foaming technology. The PBS/PLA composites, featuring nanofibrils with a diameter of approximately 100 nm, were prepared through a hot-stretching method subsequent to extrusion. Substantial improvements were observed in the crystallization rate and rheological properties of the fibrillated PBS/PLA composites. Furthermore, PLA nanofibrils enhanced foamability of the composite, achieving an impressive expansion ratio of up to 38.0, resulting in an outstanding oil-absorption performance (19.2-50.4 g/g) of the F-1 %-95 foam. Additionally, 20 adsorption-desorption cycles illustrated the prepared F-1 %-95 foam displayed recyclable oil-absorption characteristics. This work provides an eco-friendly strategy for preparing fully biodegradable foams intended for application as oil-adsorption materials.
为了解决溢油和含油废水带来的挑战，开发清洁的吸油材料至关重要。然而，传统的吸油材料存在二次污染的问题。在此，通过一种环保的超临界 CO2 发泡技术，成功制备了具有出色选择性吸油性能的完全可生物降解的纳米纤维状聚丁二酸丁二醇酯/聚乳酸（PBS/PLA）泡沫。通过挤出后的热拉伸方法制备了直径约为 100nm 的 PBS/PLA 纳米纤维复合材料。纳米纤维化 PBS/PLA 复合材料的结晶速率和流变性能得到了显著提高。此外，PLA 纳米纤维增强了复合材料的可发泡性，实现了高达 38.0 的惊人膨胀比，从而使 F-1%-95 泡沫具有出色的吸油性能（19.2-50.4g/g）。此外，经过 20 次吸附-解吸循环实验表明，所制备的 F-1%-95 泡沫具有可重复使用的吸油特性。这项工作为制备完全可生物降解的泡沫提供了一种环保的策略，可将其用作吸油材料。
