3D直写制备ZIF-8/PVDF杂化体系及性能分析

Preparation of ZIF-8/PVDF Hybrid System by 3D Direct Writing and Performance Analysis

采用溶剂法合成沸石咪唑骨架-8(ZIF-8),然后利用静电直写技术,采用物理混合法制备得到具有较好光催化性能、立体有序的ZIF-8/PVDF杂化膜。研究表明,采用物理混合的方法加入ZIF-8,对纤维膜的形貌及性能的影响较显著。随着ZIF-8含量的增加,ZIF-8/PVDF杂化膜的表面粗糙度逐渐增大,并且,出现微孔结构,水接触角呈先降低后增大的趋势变化。当ZIF-8的含量为2%时,杂化膜微孔分布较均匀,亲水性较好,杂化膜对盐酸四环素(TCH)溶液的降解效果最佳,降解率为77.9%;另外,其对诺氟沙星、环丙沙星和磺胺甲恶唑的降解率均能达到77%,并且,与第一次循环相比,经过5次循环使用后,杂化膜对TCH的降解率仅有小幅下降。

Zeolite imidazole skeleton-8(ZIF-8)was synthesized by solvent method and then a stereo-ordered ZIF-8/PVDF hybrid membrane with excellent photocatalytic performance was prepared by electrostatic direct writing technology.The data showed that the physical mixing of ZIF-8 had a significant effect on the morphology and properties of the fiber membrane.With the increase of ZIF-8 mass fraction,the surface roughness of ZIF-8/PVDF hybrid film increased,and the microporous structure appeared and the change trend of water contact angle showed a trend of first decreasing and then increasing.When the addition amount of ZIF-8 was 2%,the micropores of the hybrid membrane were relatively uniformly distributed,the hydrophilicity was good and the degradation efficiency of tetracycline hydrochloride(TCH)solution was the best,which was 77.9%,the degradation rate of norfloxacin,ciprofloxacin and sulfamethoxazole could reach 77%.And after 5 cycles,the degradation rate of TCH was only slightly lower than the degradation of the first cycle.