超润湿纳米纤维复合膜的制备与性能评价  

Preparation and Performance Evaluation of Superwetting Nanofiber Composite Membrane

作　　者：王博宇 姜博宇 王毅[3] 周少丹[4] 王国庆[5] 顾腾 张旭 WANG Boyu;JIANG Boyu;WANG Yi;ZHOU Shaodan;WANG Guoqing;GU Teng;ZHANG Xu(College of Earth Sciences,Yangtze University,Wuhan,Hubei 434020,China;Xi′an Branch,China Petroleum Tendering Center,Xi′an,Shaanxi 710000,China;No.6 Oil Production Plant,PetroChina Changqing Oilfield Company,Dingbian,Shaanxi 718600,China;No.2 Gas Production Plant,PetroChina Changqing Oilfield Company,Yulin,Shaanxi 719000,China;Exploration Enterprise Department,PetroChina Qinghai Oilfield Compamny,Dunhuang,Gansu 736202,China;No.5 Oil Production Plant,PetroChina Qinghai Oilfield Company,Mangya,Qinghai 816499,China;No.4 Oil Production Plant,PetroChina Qinghai Oilfield Company,Mangya,Qinghai 816400,China)

机构地区：[1]长江大学地球科学学院 [2]中国石油物资有限公司西安分公司 [3]中国石油长庆油田分公司第六采油厂 [4]中国石油长庆油田分公司第二采气厂 [5]中国石油青海油田公司勘探事业部 [6]中国石油青海油田公司采油五厂 [7]中国石油青海油田采油四厂

出　　处：《钻采工艺》2022年第4期147-153,共7页Drilling & Production Technology

基　　金：国家科技重大专项“涪陵页岩气水平井多段压裂效果与生产规律分析研究”(编号:2019ZX0506)。

摘　　要：含油废水的强酸碱腐蚀和高温等特性,这对膜分离材料提出了更高的要求。为解决膜分离材料抗温和抗强化学腐蚀特性,文章基于聚芳醚腈制备对水包油乳液具有高效分离的亲水—水下疏油纳米纤维复合膜,通过红外光谱实验、扫描电镜实验、X射线衍射实验和原子力显微表征手段对纳米纤维复合膜的结构和形貌进行表征和分析;通过接触角、水下油接触角以及TOC考察纳米纤维复合膜的润湿性能以及油水分离效率。研究结果表明,由于纳米纤维复合膜独特的层次结构以及聚多巴胺表面再修饰提供的粗糙结构和优异的亲水—水下疏油性能,其对各种水包油乳液均具有大于99.0%的优异分离效率,且分离通量高达632.7 L/m^(2)·h。同时,基于层次结构的聚多巴胺修饰埃洛石纳米管和氧化石墨烯之间的氢键以及多巴胺聚合的交联作用构筑了高稳定性能的复合膜。此研究在油水高效分离领域有良好的应用前景。Nowadays, oil-containing wastewater is mostly characterized by strong acid and alkali corrosion and high temperature, which puts higher requirements on membrane separation materials. In order to solve the problem of membrane separation materials′ resistance to mild and strong chemical corrosion, this paper prepares hydrophilic-submerged oleophobic nanofiber composite membranes based on polyaryl ether nitrile for efficient separation of oil-in-water emulsions. The structure and morphology of the nanofiber composite membranes were characterized and analyzed by infrared spectroscopy, scanning electron microscopy, X-ray diffraction and atomic force microscopy;the wettability and oil-water separation efficiency of the nanofiber composite membranes were investigated by contact angle, underwater oil contact angle and TOC. The results showed that due to the unique hierarchical structure of the nanofiber composite membranes, the rough structure provided by the surface remodeling of polydopamine and the excellent hydrophilic-submerged oleophobic performance, the separation efficiency of the nanofiber composite membranes was more than 99.0% for various oil-in-water emulsions, and the separation flux was up to 632.7 L/m^(2)·h. Meanwhile, the hydrogen bonding between HNTs and GO based on the hierarchical structure and the cross-linking of dopamine. The cross-linking of HNTs and GO based on the hierarchical structure and dopamine polymerization resulted in the construction of a highly stable composite membrane. This study has a good field application prospect of efficient oil-water separation.

关 键 词：润湿性 纳米纤维膜 高稳定性 油水分离 

分 类 号：TQ051.893[化学工程] X703[环境科学与工程—环境工程]