Application of Self-Adhesive Zirconium-Based Metal-Organic Framework Materials in Dichromate Ions Adsorption

被引：0
|
作者：
Yu F. [1 ]
Zhang X. [1 ]
Zhu H. [1 ]
Yu B. [1 ]
Guo Y. [1 ]
机构：
[1] Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Hangzhou
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2021年 / 37卷 / 01期
关键词：
Adsorption; Composites; Dichromate ion; Metal-organic frameworks; PET nonwoven fabrics; Self-adhesive;
D O I：
10.16865/j.cnki.1000-7555.2021.0026
中图分类号：
学科分类号：
摘要：
Metal organic framework materials (MOFs) play an important role in the treatment of heavy metal wastewater. However, there are some problems such as easy agglomeration, hard to recover and secondary pollution in further practical applications. In order to solve above-mentioned problems, this study proposed to prepare composite materials by loading self-adhesive MOFs on nonwovens. Zirconium-based MOFs (UiO-66-NH2) were grafted on the polyurethane oligomers to obtain self-adhesive zirconium-based organic framework materials (Adh-UiO-66-NH2), and the changes of the crystal form and morphology of MOFs before and after modification were analyzed. Then the Adh-UiO-66-NH2 was incorporated into polyethylene terephthalate (PET) nonwovens to obtain adh-UiO-66-NH2@PET nonwoven composites, which were used for Cr(VI) adsorption. Meanwhile, the morphology, hydrophilicity and water flux of the composites were observed. The results show that UiO-66-NH2 is covalently bonded to polyurethane prepolymers and MOFs particles are uniformly dispersed in the polyurethane matrix after grafting modification. Also the original crystal structure of UiO-66-NH2 has not changed. After the treatment with adh-UiO-66-NH2, fibers were wrapped by film in adh-UiO-66-NH2@PET nonwoven composites. In addition, compared with pure PET nonwovens, the hydrophilicity of the composite materials is enhanced and the water flux is increased. The UV absorption peak of dichromate ion (Cr2O72-) in the Cr(Ⅵ) solution is significantly weakened and the color of the solution changes from light yellow to transparent after filtering by the Adh-UiO-66-NH2@PET nonwoven composites. The composites have outstanding reusability, and after 5 cycles, they still show good separation capabilities for Cr2O72- from water. © 2021, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：88 / 94
页数：6
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