柔性可水洗的Zr-MOFs复合纳米纤维薄膜的制备和性能表征  被引量:2

Preparation and Performance Characterization of Flexible and Washable Zr-MOFs Composite Nanofiber Membrane

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作  者:郝肖柯 翟振宇 孙亚昕 李从举 Hao Xiaoke;Zhai Zhenyu;Sun Yaxin;Li Congju(Beijing University Energy Conservation and Environmental Protection Engineering Research Center,Beijing 100083,China;School of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区:[1]北京市高校节能与环保工程研究中心,北京100083 [2]北京科技大学能源与环境工程学院,北京100083

出  处:《化学学报》2022年第1期49-55,共7页Acta Chimica Sinica

基  金:国家自然科学基金(Nos.52170019,51973015);中央高校基本科研业务费专项资金(Nos.06500100,FRF-TP-19-046AIZ)资助。

摘  要:柔性高吸附性材料在废水废气处理、防护服制造、有毒有害物质监测等诸多领域中发挥着关键的作用.本工作采用水相合成的方法,以三氟乙酸(trifluoroacetic acid,TFA)为结构导向剂,以水为溶剂,在静电纺纳米纤维上原位生长了金属有机框架材料NO_(2)-UiO-66,制备了NO_(2)-UiO-66@PAN(聚丙烯腈)柔性纳米纤维膜材料.并研究了不同配比的三氟乙酸/去离子水、不同的金属盐与有机配体比例以及水热生长时间对NO_(2)-UiO-66形貌和负载效果的影响.最佳TFA添加含量为φTFA=30%,金属盐与配体物质的量比为1∶1.5,水热生长时间为4 h.采用扫描电子显微镜(scanning elec-tron microscope,SEM)、X射线衍射(X-ray diffraction,XRD)、傅里叶红外光谱(Fourier transform infrared spectroscopy,FT-IR)、热重(thermogravimetry,TG)分析及氮气吸附-脱附测试对NO_(2)-UiO-66@PAN纳米纤维膜结构进行了表征.结果表明,NO_(2)-UiO-66均匀地负载在了纳米纤维上,负载量可达33.28%,比表面积为504.16 m^(2)/g、孔体积为0.241 cm^(3)/g.并且在经过高温(320℃)、弯折和水、酸、碱洗涤后仍能保持结构的稳定性.通过以上表征分析,发现将NO_(2)-UiO-66负载在纳米纤维上能够得到物理和化学稳定性质优异的膜材料,在有毒有害等恶劣条件下有很大的应用潜力.Flexible high adsorption materials play a key role in many fields such as wastewater and exhaust gas treatment,protective clothing manufacturing,toxic and harmful substance monitoring.In situ growth of NO_(2)-UiO-66 on electrostatic spun nanofiber was obtained by aqueous synthesis using trifluoroacetic acid as regulator,and water as solvent.The effects of different ratio of trifluoroacetic acid(TFA)/deionized water,different metal salt and ligand proportions and hydrothermal growth time on NO_(2)-UiO-66 morphology and load effects were studied.The add content of TFA wasφTFA=30%,the molar ratio of metal salt and the ligand was 1∶1.5,and the hydrothermal growth time was maintained at 4 h,which proved to be the optimal synthetic conditions.The specific synthesis procedure of the NO_(2)-UiO-66@polyacrylonitrile composite nanofiber membrane(NO_(2)-UiO-66@PAN NM)was as follows:First,10%(w)of PAN spinning liquid was woven into nanofiber mem-brane using the electrospinning method.Second,a solvent having a TFA content of 30%was prepared in a sealed glass bottle,followed by addition of metal salt(ZrCl4)and organic ligand(2-nitroterephthalic acid,NO_(2)-H2BDC).Finally,the PAN nano-fiber was immersed in the precursor mixture,and after 30 min of ultrasonic treatment,it was placed in an oven at 100℃for 4 h to obtain the NO_(2)-UiO-66@PAN NM.The structure of NO_(2)-UiO-66@PAN NM was characterized by scanning electron microscope(SEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),thermogravimetry(TG)and nitrogen adsorption-desorption test.The characterization results showed that the NO_(2)-UiO-66 were uniformly loaded on nan-ofibers.The load could reach 33.28%,the Brunner-Emmet-Teller measurements(BET)surface area was 504.16 m^(2)/g,and the pore volume was 0.241 cm^(3)/g.Further,the NO_(2)-UiO-66@PAN nanofiber membrane still remained in the stability of the structure after being treated with high temperature(320℃),bending and washing with water,acid and alkali.Through the above characterization anal

关 键 词:静电纺丝 纳米纤维 金属有机框架 NO_(2)-UiO-66 水相合成 

分 类 号:TQ342.94[化学工程—化纤工业] TB383.2[一般工业技术—材料科学与工程]

 

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