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    赖智荣, 熊浚翔, 黄蓓, 曹峥, 成骏峰, 刘春林. 聚丙烯酰胺/壳聚糖/二氧化硅水凝胶亲水疏油筛网的制备与性能[J]. 华东理工大学学报(自然科学版), 2023, 49(5): 631-638. DOI: 10.14135/j.cnki.1006-3080.20220704002
    引用本文: 赖智荣, 熊浚翔, 黄蓓, 曹峥, 成骏峰, 刘春林. 聚丙烯酰胺/壳聚糖/二氧化硅水凝胶亲水疏油筛网的制备与性能[J]. 华东理工大学学报(自然科学版), 2023, 49(5): 631-638. DOI: 10.14135/j.cnki.1006-3080.20220704002
    LAI Zhirong, XIONG Junxiang, HUANG Bei, CAO Zheng, CHENG Junfeng, LIU Chunlin. Preparation and Performance of Hydrophilic and Oleophobic Mesh Modifed with Polyacrylamide/Chitosan/SiO2 Hydrogel[J]. Journal of East China University of Science and Technology, 2023, 49(5): 631-638. DOI: 10.14135/j.cnki.1006-3080.20220704002
    Citation: LAI Zhirong, XIONG Junxiang, HUANG Bei, CAO Zheng, CHENG Junfeng, LIU Chunlin. Preparation and Performance of Hydrophilic and Oleophobic Mesh Modifed with Polyacrylamide/Chitosan/SiO2 Hydrogel[J]. Journal of East China University of Science and Technology, 2023, 49(5): 631-638. DOI: 10.14135/j.cnki.1006-3080.20220704002

    聚丙烯酰胺/壳聚糖/二氧化硅水凝胶亲水疏油筛网的制备与性能

    Preparation and Performance of Hydrophilic and Oleophobic Mesh Modifed with Polyacrylamide/Chitosan/SiO2 Hydrogel

    • 摘要: 采用1064 nm近红外激光对不锈钢筛网(SSM)进行表面刻蚀,通过调节激光器参数得到表面粗糙度最佳的SSM。以激光刻蚀的SSM为基体,壳聚糖(CS)为亲水组分,丙烯酰胺(AM)为单体,将不同含量的二氧化硅(SiO2)分散到体系中,加入光引发剂,以N,N'-亚甲基双丙烯酰胺(MBA)为交联剂,利用紫外光引发自由基聚合制备水下超疏油油水分离复合筛网PAM/CS/SiO2@SSM。利用激光扫描共聚焦显微镜(CLSM)、扫描电子显微镜(SEM)、傅里叶变换红外光谱(FT-IR)等测试方法对PAM/CS/SiO2@SSM进行表征,研究了不同CS组分和不同SiO2添加量对复合筛网表面粗糙度的影响;采用重力驱动的方法分离油水混合物并研究了复合筛网的油水分离效率。实验结果表明:激光刻蚀筛网具有工艺简单、刻蚀快速且参数可控的优势;制备的PAM/CS/SiO2@SSM分离筛网水下油接触角为155°,具有良好的亲水疏油性能;分别对液体石蜡、正己烷和石油醚进行油水分离实验,结果表明复合筛网对这3种油品的分离效率分别为99.1%、98.8%和98.4%,具有较高的油水分离效率。

       

      Abstract: A stainless-steel mesh (SSM) is laser-etched with a 1064 nm near-infrared laser, and the best surface roughness is obtained by adjusting the laser parameters. Compared to traditional chemical etching that requires consumption of chemical reagents and results in environmental pollution problems, our laser etching process is simple, and has advantages in terms of process controllability, being fast and efficient, safety and eco-friendliness. The laser-etched SSM was used as the matrix, to which chitosan (CS) used as the hydrophilic component, monomeric acrylamide (AM), and different contents of silica (SiO2) were dispersed. A photo initiator, N, N’-methylenebisacrylamide (MBA), was used for crosslinking, producing a superoleophobic oil-water separation membrane (PAM/CS/SiO2@SSM) by ultraviolet light-initiated radical polymerization. Laser scanning confocal microscopy (CLSM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and other techniques were used for the characterization of PAM/CS/SiO2@SSM separation mesh, and the effects of different CS and SiO2 contents on the surface roughness of composite mesh were studied. The gravity-driven method was used to separate the oil-water mixture, and the oil-water separation efficiency of the composite mesh was determined. The experimental results show that the laser etch mesh is simple to prepare with a fast etching rate and controllable parameters. The underwater oil contact angle of the prepared PAM/CS/SiO2@SSM separation mesh is 155°, indicating an excellent hydrophilicity and oleophobicity. The separation efficiency of the composite mesh for three different oil-water mixtures including liquid paraffin, n-hexane, and petroleum ether is 99.1%, 98.8% and 98.4%, respectively, indicating a high oil-water separation efficiency.

       

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