二维负载型乙烯脱除剂的制备及性能研究
Preparation and Performances of Two-Dimensional Supported Ethylene Adsorbent
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摘要: 本文旨在制备一种二维片状的高锰酸钾乙烯脱除剂,用于果蔬运输过程中的储运保存。滤纸纤维作为基材,对其表面进行硅/铝溶胶修饰,通过浸渍法负载活性物质高锰酸钾,利用气相色谱仪评价所制备样品的乙烯脱除效果,扫描电子显微镜(scanning transmission electron microscopy,SEM-EDS)对样品微观结构进行表征。结果表明,硅/铝溶胶处理的样品负载20 mg KMnO4,乙烯起始浓度为360 μL/L,在100 min内乙烯吸附率分别达到11.67%和87.00%,铝溶胶处理的样品乙烯吸附率明显高于硅溶胶处理的样品。SEM-EDS结果表明,高锰酸钾能均匀分散在铝溶胶上,而其在硅溶胶上以大颗粒团聚态存在,这是影响乙烯吸附率的主要因素。Abstract: This paper aimed to prepare a two-dimensional sheet of potassium permanganate-loaded ethylene remover for fruit and vegetable transportation and storage. The filter paper fiber was used as a substrate,and the surface was subjected to silicon/aluminum sol modification. The active material potassium permanganate was supported by the dipping method,and the ethylene removal effect of the prepared sample was evaluated by gas chromatography. The microstructure of the sample was characterized by scanning electron microscope(scanning transmission electron microscopy,SEM-EDS). The results showed that silicon/aluminum sol-treated sample was loaded with 20 mg KMnO4,the initial ethylene concentration was 360 μL/L,and the ethylene adsorption rate reached 11.67% and 87.00% in 100 min,respectively. The ethylene adsorption rate of the aluminum sol-treated sample was significantly higher than that of the silica sol-treated sample. SEM-EDS results showed that potassium permanganate could be uniformly dispersed on the aluminum sol,and it existed in the large particle agglomeration state on the silica sol,which was the main factor affecting the adsorption rate of ethylene.