超声辅助多巴胺化学构筑超疏水材料及油/水分离应用  

Ultrasonication-Assisted Dopamine Chemistry toward Superhydrophobic Surfaces for Oil/water Separation

作　　者：刘维思 朱严瑾 王碧云 王妮 邓字巍[3] LIU Wei-si;ZHU Yan-jin;WANG Bi-yun;WANG Ni;DENG Zi-wei(Unit 91515 of PLA,Sanya 572000;Yunnan Natural Rubber Industry Group Co.,Ltd,Kunming 650216;School of Materials Science and Engineering,Shaanxi Normal University,Xi'an,710119)

机构地区：[1]91515部队,海南三亚572000 [2]云南天然橡胶产业集团有限公司,昆明650216 [3]陕西师范大学材料科学与工程学院,西安710119

出　　处：《胶体与聚合物》2022年第3期110-113,共4页Chinese Journal of Colloid & Polymer

基　　金：陕西省自然科学基金(2021JM-202)。

摘　　要：本文通过超声辐射多巴胺(DA)与十二烷基三甲氧基硅氧烷(DTMS)在碱性水溶液中发生化学反应,并在MF海绵基材上构筑出超疏水表面。在整个超疏水海绵制备过程中,超声辐射可以显著加速DA氧化自聚合,并在MF表面构筑出粗糙的微/纳多级结构,通过结合低表面能物质DTMS,最终“一步法”快速形成超疏水海绵材料。所制备的超疏水海绵不仅具有高的油/水分离效率,而且还具有优异机械稳定性能。因此,这种超声辅助DA化学构筑出的超疏水海绵可广泛应用于含油废水处理。Here, we propose an ultrasound-accelerated strategy to prepare melamine(MF) sponge with hierarchically structured superhydrophobic surface by briefly submerging MF sponge into a slightly alkaline aqueous mixture comprising dopamine hydrochloride(DA) and dodecyltrimethoxysilane(DTMS) under ultrasound. The ultrasound is found significantly accelerate the hierarchical surface structures from PDA,while only minorly influences the hydrolysis of DTMS that hydrophobically modifies the surface of PDA. As a result, the hierarchical superhydrophobic surfaces are formed within 25 min. In addition, the superhydrophobicity of the surface can be recovered by repeating this ultrasound-assisted process, provided that the superhydrophobic feature is vanished or lost during their use in a harsh environment. These superhydrophobic sponges are superior materials for oil collection from water, in a durably robust, efficient and recyclable manner with multi-life span.

关 键 词：超疏水 超声辐射 聚多巴胺 有机硅氧烷 油/水分离 

分 类 号：TQ31[化学工程—高聚物工业] O63[理学—高分子化学]