Wu Jialong, Ma Xiaozhen, Gnanasekar Pitchaimari, Wang Fan, Zhu Jin, Yan Ning, Chen Jing
Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Laboratory of Polymers and Composites, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; Northeast Electric Power University, Jilin, Jilin 132012, China.
Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Laboratory of Polymers and Composites, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100039, China.
Sci Total Environ. 2023 Feb 20;860:160276. doi: 10.1016/j.scitotenv.2022.160276. Epub 2022 Nov 17.
Superhydrophobic polyurethane foam is one of the most promising materials for oil-water separation. However, there are only limited studies prepared matrix superhydrophobic foams as adsorbents. In this paper, SiO modified by 1H, 1H, 2H, 2H-perfluorododecyl trichlorosilane (F-SiO) was added into the lignin-based foam matrix by a one-step foaming technique. The average diameter of F-SiO was about 480 nm with an water contact angle (WCA) of 160.3°. The lignin-based polyurethane foam with F-SiO had a superhydrophobic water contact angle of 151.3°. There is no obvious change in contact angle after 100 cycles of compression or after cutting and abrasion. Scanning electron microscopy (SEM) analysis showed that F-SiO was distributed both on the surface and inside of the foam. The efficiency for oil-water separation reached 99 %. Under the light intensity of 1 kW/m, the surface temperature of the lignin-based foam rose to 77.6 °C. In addition, the foam exhibited self-cleaning properties and degraded within 2 h in an alcoholic alkali solution. Thus, in this study, we developed a novel matrix superhydrophobic lignin-based polyurethane foam with an excellent promise to be used as oil water separation adsorbents in industrial wastewater treatment and oil spill clean-up processes.
超疏水聚氨酯泡沫是最具前景的油水分离材料之一。然而，制备基质超疏水泡沫作为吸附剂的研究还很有限。本文通过一步发泡技术将经1H，1H，2H，2H-全氟十二烷基三氯硅烷（F-SiO）改性的SiO添加到木质素基泡沫基质中。F-SiO的平均直径约为480nm，水接触角（WCA）为160.3°。含有F-SiO的木质素基聚氨酯泡沫的超疏水接触角为151.3°。经过100次压缩循环或切割磨损后，接触角没有明显变化。扫描电子显微镜（SEM）分析表明，F-SiO分布在泡沫的表面和内部。油水分离效率达到99%。在1kW/m的光强下，木质素基泡沫的表面温度升至77.6°C。此外，该泡沫具有自清洁性能，在碱性醇溶液中2小时内降解。因此，在本研究中，我们开发了一种新型的基质超疏水木质素基聚氨酯泡沫，有望在工业废水处理和溢油清理过程中用作油水分离吸附剂。
