In situ self-assembly of zeolitic imidazolate frameworks on the surface of flexible polyurethane foam: Towards for highly efficient oil spill cleanup and fire safety
In situ self-assembly of zeolitic imidazolate frameworks on the surface of flexible polyurethane foam: Towards for highly efficient oil spill cleanup and fire safety
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DOI：
10.1016/j.apsusc.2019.144700
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发表时间：
2020-03
影响因子：
6.7
通讯作者：
Sijia Zhao;Lianhua Yin;Qianqian Zhou;Changkun Liu;K. Zhou
中科院分区：
文献类型：
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作者：
Sijia Zhao;Lianhua Yin;Qianqian Zhou;Changkun Liu;K. Zhou
本文采用原位自组装方法成功制备了金属有机骨架改性的疏水亲油软质聚氨酯泡沫塑料。采用X射线衍射、傅里叶变换红外光谱、扫描电子显微镜和X射线能谱对MFPU泡沫的结构和形态进行了表征。金属有机骨架的生长改善了FPU泡沫的表面粗糙度，导致水接触角大幅增加，这可以提供良好的改善疏水性和亲脂性。改性后的FPU泡沫材料对各种油类和有机溶剂都具有很好的吸附能力和回收利用能力。最大吸附量可达自身重量的33倍。通过锥形量热仪测试、垂直燃烧测试和极限氧指数测试对MFPU泡沫的燃烧性能进行了评价，其峰值热释放速率和发烟速率均显著降低，表明ZIF-8涂层显著提高了FPU泡沫的阻燃性能。这些改进使MFPU泡沫成为一种具有优异防火性能的吸收剂，并在油水分离方面具有潜在的应用前景。
In this work, a hydrophobic and oleophilic flexible polyurethane foam modified with metal organic framework (MFPU) was successfully fabricated through in situ self-assembly method. The structure and morphology of MFPU foams were characterized by X-ray diffraction, Fourier transform infrared spectra, Scanning electron microscopy and Energy dispersive X-Ray spectroscopy measurements. The growth of metal organic frameworks improved the surface roughness of FPU foams, leading to the highly increased water contact angle, which could provide well ameliorated hydrophobicity and lipophilicity properties. The modified FPU foams exhibited extraordinary absorption capacity and recyclability for various kinds of oils and organic solvents. The maximum absorption capacity could achieve 33 times of its own weight. The flammability of MFPU foams was evaluated by cone calorimeter test, vertical burning test and limited oxygen index test, the peak heat release rate and smoke production rate both decreased dramatically, indicating the coating of ZIF-8 was significantly conducive to improve the flame retardancy of FPU foams. These improvements made MFPU foams become an excellent absorbent with remarkable fire safety, and offered it with potential application in oil/water separation.