尿素水热法制备PET@LDH纳米纤维膜及其除铬性能研究

发布时间：2018-07-01 18:19

  本文选题：静电纺丝 + 纳米纤维膜　； 参考：《化工新型材料》2017年02期

【摘要】：通过静电纺丝法制备聚酯(PET)纳米纤维膜,并运用尿素水热法在其表面原位生长水滑石(LDH)微晶层,得到PET@LDH纳米纤维膜。采用扫描电子显微镜、红外光谱仪、X-射线衍射仪和能谱仪等对PET@LDH纳米纤维膜进行表征。结果表明:水热反应8h,水滑石晶片良好生长在PET纳米纤维表面,成功制备出PET@LDH纳米纤维膜。运用电感耦合等离子体测试技术对PET@LDH纳米纤维膜的除铬效果进行了探究,结果表明:当Mg/Al摩尔比为2∶1,Cr(Ⅵ)溶液的pH=2~3时,此纳米纤维膜吸附10d时达到吸附平衡,对Cr(Ⅵ)的平衡吸附量为14mg/g,并且符合准二级动力学吸附方程。因此,PET@LDH纳米纤维膜是一种有效的去除水中Cr(Ⅵ)的吸附剂,对当前水环境的改善提供了一个可行的方法。
[Abstract]:The polyester (PET) nanofiber membrane was prepared by electrospinning, and the PET@LDH nanofiber membrane was obtained by using the urea hydrothermal method to grow the LDH microcrystalline layer in situ on its surface. The PET@ LDH nanofiber membrane was characterized by scanning electron microscope, infrared spectrometer, X- ray diffractometer and energy spectrometer. The results showed that the hydrothermal reaction was 8h, The PET@LDH nano fiber membrane was successfully prepared on the surface of PET nanofiber on the surface of the PET nanofiber. The effect of the chromium removal in the PET@LDH nanofiber membrane was investigated by inductively coupled plasma test. The results showed that when the molar ratio of Mg/Al was 2 to 1 and pH=2~3 in Cr (VI) solution, the adsorption of the nano fiber membrane to 10d reached the level of adsorption. Balance, the equilibrium adsorption amount for Cr (VI) is 14mg/g and meets the quasi two stage kinetic adsorption equation. Therefore, PET@LDH nanofiber membrane is an effective adsorbent for removing Cr (VI) in water, which provides a feasible method for the improvement of current water environment.
【作者单位】： 北京服装学院材料科学与工程学院;北京市服装材料研究开发与评价重点实验室;
【基金】：国家自然科学基金项目(21274006、51503005) 北京市科技北京百名领军人才工程(LJ201614) 北京市百千万人才工程(110403000402) 北京市属高等学校高层次人才引进与培养计划项目—北京市长城学者培育计划(CIT&TCD20150306) 北京市属高校创新能力提升计划项目(TJSHG201310012021) 北京服装学院创新团队与优秀人才选拔与培养计划项目(2014AL-68);北京服装学院校内重点项目(2016A-03) 北京市服装材料研究开发与评价重点实验室开放课题(2015ZK-02)
【分类号】：TQ340.1
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本文编号：2088653