磁驱动超疏水海绵制备及油水分离性能
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摘要
采用浸渍法,以纳米Fe_3O_4和硬脂酸对聚氨酯海绵进行了表面改性,制备了磁驱动超疏水海绵,并对其进行了XRD、FTIR、TG、接触角测试。结果显示:改性后的海绵水接触角高达158?,热稳定性较原始海绵明显提高,弹性性能未遭到破坏,置于高温(热水50～90℃,热空气80～120℃)、强腐蚀溶液(pH=2～13)的苛刻条件下24 h后,水接触角仍然高于148?。将改性后的海绵用于油/水混合物的分离中,表现出了优异的分离能力,且可通过磁铁进行磁驱动和磁回收。
In this study, the surface of polyurethane sponge was modified by impregnation method with Fe_3O_4 nanoparticles and stearic acid to prepare a magnetically driven superhydrophobic sponge. The sample was characterized by XRD, FTIR, TG and contact angle measurement techniques. The results showed that the water contact angle of the as-prepared sponge was up to 158? and the thermal stability was obviously higher than that the pristine sponge. The sample exhibited excellent elastic performance. Moreover, after the prepared sponge was placed under severe conditions, such as high temperature(hot water 50～90 ℃ and hot air 80～120 ℃) and strong corrosive solution(pH= 2～13) for 24 h, its water contact angle was still more than 148?. The as-prepared sponge showed excellent separation capacities for oil and water mixtures, and it could be driven and recycled simply by magnets.
In this study, the surface of polyurethane sponge was modified by impregnation method with Fe_3O_4 nanoparticles and stearic acid to prepare a magnetically driven superhydrophobic sponge. The sample was characterized by XRD, FTIR, TG and contact angle measurement techniques. The results showed that the water contact angle of the as-prepared sponge was up to 158? and the thermal stability was obviously higher than that the pristine sponge. The sample exhibited excellent elastic performance. Moreover, after the prepared sponge was placed under severe conditions, such as high temperature(hot water 50～90 ℃ and hot air 80～120 ℃) and strong corrosive solution(pH= 2～13) for 24 h, its water contact angle was still more than 148?. The as-prepared sponge showed excellent separation capacities for oil and water mixtures, and it could be driven and recycled simply by magnets.
引文
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[2]Peng H,Wang H,Wu J,et al.Preparation of superhydrophobic magnetic cellulose sponge for removing oil from water[J].Industrial&Engineering Chemistry Research,2016,55(3):832-838.
[3]Wang J,Wang H,Geng G.Highly efficient oil-in-water emulsion and oil layer/water mixture separation based on durably superhydrophobic sponge prepared via a facile route[J].Marine Pollution Bulletin,2018,127:108-116.
[4]Beshkar F,Khojasteh H,Salavati-Niasari M.Recyclable magnetic superhydrophobic straw soot sponge for highly efficient oil/water separation[J].Journal of Colloid&Interface Science,2017,497:57-65.
[5]Liu L,Lei J,Li L,et al.A facile method to fabricate the superhydrophobic magnetic sponge for oil-water separation[J].Materials Letters,2017,195:66-70.
[6]Li Z,Lin B,Jiang L,et al.Effective preparation of magnetic superhydrophobic Fe3O4/PU sponge for oil-water separation[J].Applied Surface Science,2018,427:56-64.
[7]Rezayi T,Entezari M.Wettability properties vary with different morphologies of ZnO nanoparticles deposited on glass and modified by stearic acid[J].New Journal of Chemistry,2016,40(3):2582-2591.
[8]Sukamanchi R,Mathew D,Santhosh-Kumar K.Durable superhydrophobic particles mimicking leafhopper surface:superoleophilicity and very low surface energy[J].Acs Sustainable Chemistry,2016,5(1):252-260.
[9]Liu Y,Ma J,Wu T,et al.Cost-effective reduced graphene oxidecoated polyurethane sponge as a highly efficient and reusable oilabsorbent[J].Acs Applied Materials&Interfaces,2013,5(20):10018-10026.
[10]Khanoonkon N,Yoksan R,Ogale A.Morphological characteristics of stearic acid-grafted starch compatibilized linear low density polyethylene/thermoplastic starch blown film[J].European Polymer Journal,2016,76:266-277.
[11]Wang J,Zheng Y.Oil/water mixtures and emulsions separation of stearic acidfunctionalized sponge fabricated via a facile one-step coating method[J].Separation&Purification Technology,2017,181:183-191.
[12]Zhang X,Liu D,Ma Y,et al.Super-hydrophobic graphene coated polyurethane(GN@PU)sponge with great oil-water separation performance[J].Applied Surface Science,2017,422:116-124.
[13]Lu Y,Wang Y,Liu L,et al.Environmental-friendly and magnetic/silanized ethyl cellulosesponges as effective and recyclable oil-absorption materials[J].Carbohydrate Polymers,2017,173:422-430.
[14]Xiang Y,Pang Y,Jiang X,et al.One-step fabrication of novel superhydrophobic and superoleophilic sponge with outstanding absorbency and flame-retardancy for the selective removal of oily organic solvent from water[J].Applied Surface Science,2018,428:338-347.
[15]Yang W,Gao H,Zhao Y,et al.Facile preparation of nitrogen-doped graphene sponge as a highly efficient oil absorption material[J].Materials Letters,2016,178:95-99.
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