| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Polyaluminum Chloride In-situ Modified Polyurethane Foam for Oil-Water Separation |
| FAN Leiyi1,2,*, WANG Rui2, HE Ruijie2, ZHANG Ruiyang2, ZHANG Qian2, ZHOU Ying1,2,*
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1 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
2 The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China |
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Abstract The discharge of oily wastewater has caused serious environmental pollution, and its purification treatment has attracted widespread attention. In this work, the polyurethane foam (PU) modified by polyaluminum chloride (PAC) (PAC@PU) was prepared via in-situ foaming process. The composition structure, surface properties and oil-water separation properties of the samples were studied. The obtained PAC@PU showed outstanding hydrophobicity (hydrophobic angle of (140±3)°) and excellent physical and chemical stability. The absorption capacity of PAC@PU for pump oil reached 79.42 g·g-1, which remained unchanged after 200 absorption-extrusion cycles. Moreover, the static separation flux and dynamic separation flux of the layered oil-water mixture were respectively 1.55×106 L·m-3·h-1 and 3.3×105 L·m-3·h-1 over PAC@PU. The separation efficiency of PAC@PU for oil-in-water (O/W) emulsions was as high as 86.7% and the separation flux reached 3×105 L·m-3·h-1. Mechanism analysis showed that PAC improved the hydrophobicity and surface energy of PU, and enriched the adsorption sites of PU, thereby optimizing the ability of PU to capture the oil droplet in O/W emulsions. Overall, PAC@PU exhibits excellent emulsion separation performance.
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Published: 10 May 2022
Online: 2022-05-09
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| Fund:National Natural Science Foundation Petrochemical Joint Fund of China (U1862111), Sichuan Provincial Youth Science and Technology Innovation Research Team Special Project (2016TD0011) and Sichuan Provincial Academic and Technical Leaders Training Fund. |
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2022, Vol. 36 
