2-壬烯醛是“老人味”的主要产生原因之一,可采用铜掺杂锰氧化物/醋酸纤维素(AT-CuMn/CA)复合纤维膜去除2-壬烯醛。首先通过氧化还原法制备铜锰混合过渡金属氧化物,再对其进行酸处理制备非晶态催化剂(AT-CuMn);以AT-CuMn/CA为溶质,丙酮和二甲基乙酰胺为溶剂,通过静电纺丝制得不同AT-CuMn掺杂量的AT-CuMn/CA复合纤维膜。利用SEM、XRD、EDS和GS-MS对催化剂粉末和复合纤维膜的形貌、结构和氧化性能进行表征。结果表明,掺杂AT-CuMn(铜锰摩尔比为1∶4)的质量分数为10%的AT-CuMn/CA复合纤维膜对2-壬烯醛的去除效果最好,达到80.70%。
2-nonenal is one of the main contributors to the “aging flavor”,and it can be removed by copper-doped manganese oxide/cellulose acetate (AT-CuMn/CA) composite fiber membranes.The copper-manganese mixed transition metal oxides were first prepared using a redox method,followed by acid treatment to produce an amorphous catalyst (AT-CuMn).Using AT-CuMn/CA as solute and acetone and dimethylformamide as solvents,AT-CuMn/CA composite fiber membranes with varying AT-CuMn doping amounts were fabricated via electrospinning.The morphology,structure,and oxidative performance of the catalyst powder and composite fiber membranes were characterized using SEM,XRD,EDS,and GS-MS.The results indicated that the AT-CuMn/CA composite fiber membrane with a mass fraction of 10% AT-CuMn (with a copper-manganese molar ratio of 1∶4) exhibited the highest removal efficiency for 2-nonenal,reaching 80.70%.
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基金资助
江苏省重点研发项目(BE2017060)
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