摘要
超疏水多孔芳香骨架材料能有效实现油水分离,在石油污水处理方面具有良好应用前景,其微腔强大的毛细管作用被证实是有效容器,但相对较小的孔道空间导致其吸附能力有限.本文通过在咔唑基多孔芳香骨架中引入额外的苯基片段作为桥接开关(π-π交联桥),制备了超疏水多孔芳香骨架材料(LNU-42),从而增大了材料的孔径.结果表明,与未引入苯基桥开关的咔唑基超疏水多孔芳香骨架材料(LNU-40)相比,内置苯基桥接开关使LNU-42的孔径扩大了6~8倍,显著增加了对有机溶剂的容纳空间,负载LNU-42后的织物对氯苯吸附量达到自身重量的7.8倍,吸附性能提高了66%,对氯苯、四氯化碳等有机溶剂的分离效率超过90%.值得注意的是,在强酸/碱性(1 mol/L)和高盐浓度(1 mol/L)等较严苛环境条件下,LNU-42仍能保持较强的疏水性.本研究为制备具有高效油水分离性能的超疏水材料提供了适宜的技术路径,并为处理石油污水提供了科技支撑.
Superhydrophobic porous aromatic framework materials have demonstrated remarkable potential in efficiently achieving oil-water separation,thereby holding great promise for their application in treating oilfield wastewater.The robust capillary action within their microcavities has been verified to serve as an effective contain⁃ment mechanism.Nevertheless,the relatively constricted pore space poses a limitation on their adsorption capacity.In this work,by ingeniously incorporating additional phenyl fragments as bridging switches(π-πcross-linking bridges)into the carbazole-based porous aromatic framework,we synthesized a novel superhydrophobic porous aromatic material,denoted as LNU-42,and significantly enlarged its pore size.Experimental results reveal that,in contrast to the carbazole-based superhydrophobic porous aromatic material LNU-40,which lacks the phenyl-bridge switches,the introduction of these built-in phenyl-bridging switches has led to a 6-8-fold expansion in the pore size of LNU-42.This substantial increase has notably augmented the accommodation space for organic solvents.Specifically,the fabric impregnated with LNU-42 exhibits an outstanding adsorption capacity for chlorobenzene,reaching up to 7.8 times its own weight,representing a 66%enhancement in adsorption performance.Moreover,the separation efficiency of LNU-42 for organic solvents such as chlorobenzene and carbon tetrachloride surpasses 90%.Notably,LNU-42 demonstrates remarkable stability,maintaining its strong hydrophobicity even under extremely harsh environmental conditions,including strong acid/alkali(1 mol/L)and high-salt concentration(1 mol/L).This study not only furnishes a viable technical approach for the fabrication of superhydrophobic materials with high-efficiency oil-water separation capabilities but also offers crucial scientific and technological underpinnings for the treatment of oilfield wastewater.
作者
马硕
陈士欣
夏春龙
周鸿飞
李丛
白伟桦
崔博
郑桂月
布乃顺
何哲
MA Shuo;CHEN Shixin;XIA Chunlong;ZHOU Hongfei;LI Cong;BAI Weihua;CUI Bo;ZHENG Guiyue;BU Naishun;HE Zhe(Institute of Forensic Institution,Liaoning University,Shenyang 110036,China;College of Environment,Liaoning University,Shenyang 110036,China;Fushun Hydrological Bureau of Liaoning Province,Fushun 113005,China;Liaoning River and Reservoir Management Service Center,Shenyang 110055,China;College of Chemistry,Liaoning University,Shenyang 110036,China)
出处
《高等学校化学学报》
北大核心
2025年第9期162-170,共9页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:31972522)
抚顺市水务局政府服务项目(批准号:JH24-210400-00444)
辽宁省教育厅高校基本科研项目
沈阳市科技局社会治理科技专项
辽宁大学基本科研项目和辽宁大学大学生创新创业训练计划项目资助.
关键词
超疏水多孔芳香骨架材料
内置苯基桥接开关
SUZUKI反应
油水分离性能
Superhydrophobic porous aromatic framework material
Built-in phenyl bridging switch
Suzuki reaction
Oil-water separation performance
作者简介
联系人:布乃顺,男,博士,教授,主要从事新污染物的生态环境效应与管控策略方面的研究.E-mail:bunaishun@lnu.edu.cn;联系人:何哲,女,硕士,讲师,主要从事环境化学与污染控制方面的研究.E-mail:hezhe 1980@126.com。
