超疏水Ti-MOF涂覆PET复合滤料用于细颗粒物高效去除  

Ultra-superhydrophobic Ti-MOF coated PET composite filter media for efficient removal of fine particulate matter

作　　者：董伟[1,2,3,4] 周士安[5] 唐刚 项腾飞 龙红明[2] 丁磊 张奎[6] 钱付平[5] 李刚 DONG Wei;ZHOU Shi-an;TANG Gang;XIANG Teng-fei;LONG Hong-ming;DING Lei;ZHANG Kui;QIAN Fu-ping;LI Gang(School of Architecture and Engineering,Anhui University of Technology,Maanshan 243032,China;Metallurgical Emission Reduction and Comprehensive Resource Utilization Key Laboratory,Ministry of Education,Anhui University of Technology,Maanshan 243032,China;Engineering Research Center of Biofilm Water Purification and Utilization Technology,Anhui University of Technology,Maanshan 243032,China;State Key Laboratory of Safety and Health for Metal Mines,Ma'anshan 243000,China;School of Energy and Environment,Anhui University of Technology,Ma'anshan 243032,China;School of Chemistry and Chemical Engineering,Anhui University of Technology,Ma'anshan 243032,China)

机构地区：[1]安徽工业大学建筑工程学院,安徽马鞍山243032 [2]冶金减排与资源综合利用教育部重点实验室(安徽工业大学),安徽马鞍山243032 [3]生物膜法水质净化及利用技术教育部工程研究中心(安徽工业大学),安徽马鞍山243032 [4]金属矿山安全与健康国家重点实验室,安徽马鞍山243000 [5]安徽工业大学能源与环境学院,安徽马鞍山243032 [6]安徽工业大学化学与化工学院,安徽马鞍山243032

出　　处：《中国环境科学》2023年第5期2171-2181,共11页China Environmental Science

基　　金：安徽省高校自然科学研究项目(2022AH050337);金属矿山安全与健康国家重点实验室项目(2022-JSKSSYS-04);教育部冶金减排与资源循环利用重点实验室项目(安徽工业大学)(JKF21-08);安徽省科技重大项目(18030801109);生物膜法水质净化及利用技术教育部工程研究中心项目(BWPU2021KF05);冶金过程节能与污染控制工程技术研究中心项目(GKF20-7)。

摘　　要：为有效捕集工业烟气中的细颗粒物,克服滤袋在高湿环境下的结露和糊袋现象,实现烟气超低排放的目标,在室温下将氟化NH_(2)-MIL-125(Ti-MOF)喷涂在PET纤维表面快速牢固组装,在复合滤料纤维表面形成低表面能的微/纳粗糙结构,构筑了一种超疏水复合过滤材料(SH-T@PET),其水接触角(WCA)高达(152.5±1.8),水流失角(WSA)为(5.7±1.7),具有优异的疏水稳定性.此外,由于SH-T@PET纤维表面Ti-MOF活性单元的极性官能团(-NH_(2))、高ζ电位和大空隙结构等多重作用,其对PM0.3去除效率(RE为(96.53±0.65)%)得到很大程度的提升.在Ti-MOF低负载率(2.1%)下,SH-T@PET的微观孔隙结构几乎没有改变,过滤压降(ΔP,50Pa)没有急剧增加,品质因子(QF为0.0672Pa-1)比原始PET滤料约有12.79%的提升.同时,SH-T@PET复合滤料还具有良好的热稳定性和机械稳定性.Achieving ultralow emissions requires to effectively capture fine particles from industrial flue gas and overcome the condensation and paste bag phenomena of filter bags in high-humidity environments.In this study,a novel superhydrophobic metal-organic framework(MOF)-based composite filter was constructed.Specifically,fluorinated NH2-MIL-125 was sprayed onto the surface of polyethylene terephthalate(PET)fibers to form a micro/nanoscale rough structure on the fiber surface that facilitated the rapid and firm assembly of the composite filter(SH-T@PET).The SH-T@PET had highly stable hydrophobicity,as evidenced by its water contact(WCA)and shedding angles(WSA)of(152.5±1.8)°and(6.7±1.7)°,respectively.In addition,the PM0.3removal efficiency(RE,(96.53±0.65)%)was greatly improved owing to the multiple effects of polar functional groups(-NH2),high zeta(ζ)potential,and the large void structure of NH2-MIL-125active units on the surface of SH-T@PET fibers.Moreover,the microscopic pore structure of SH-T@PET remained unchanged,the filtration pressure drop(ΔP,50Pa)did not accelerat sharply,and the quality factor(QF,0.0672Pa-1)was approximately 12.79%higher than that of the original PET filter at the low load rate(2.1%).The SH-T@PET composite filter media also exhibited good thermal and mechanical stabilities.

关 键 词：超疏水 NH_(2)-MIL-125(Ti)晶体 微/纳结构 颗粒物去除 过滤性能 

分 类 号：X513[环境科学与工程—环境工程]