基于纤维素或木质素等绿色材料的快速提取和浓缩系统是有前途的。然而,仍然需要优化材料性能和生产工艺。与传统的纤维素或木质素吸附剂材料不同,水生芦苇根细胞可以将外部有机污染物集中在水中,并在植物中积累。受此启发,设计了一种新型纳米纤维素-木质素气凝胶(NLAG),其中以纳米纤维素为基材,木质素和聚酰胺环氧氯丙烷用于交联纤维素,以提高NLGA的强度,具有良好的机械稳定性和水油两亲性。在实际应用中,NLAG上的有机膜可以将有机污染物从水中输送到NLAG,它们被固定的地方。气凝胶可以在几分钟内去除超过93%的外源苯酚,在里面高度丰富。此外,气凝胶有利于过滤和形状恢复以便重复使用。这项工作建立了一种新型的生物聚合物-气凝胶提取系统,具有可持续性的优势,效率高,稳定性,和易于拆卸,这是传统吸附材料难以达到的。
Rapid extraction and concentration systems based on green materials such as cellulose or lignin are promising. However, there is still a need to optimize the material properties and production processes. Unlike conventional cellulose or lignin sorbent materials, aquatic reed root cells can concentrate external organic pollutants in the water and accumulate them in the plant. Inspired by this, a new nanocellulose-lignin aerogel (NLAG) was designed, in which nanocellulose was used as a substrate and lignin and polyamide epoxy chloropropane were used to crosslink cellulose in order to enhance the strength of the NLGA, resulting in good mechanical stability and water-oil amphiphilic properties. In practical applications, the organic membrane on the NLAG can transport organic pollutants from water to the NLAG, where they are immobilized. This is evidenced by the fact that the aerogel can remove more than 93% of exogenous phenol within a few minutes, highly enriching it inside. In addition, the aerogel facilitates filtration and shape recovery for reuse. This work establishes a novel biopolymer-aerogel-based extraction system with the advantages of sustainability, high efficiency, stability, and easy detachability, which are hard for the traditional adsorbent materials to attain.