【摘要】 以多巴胺及介孔硅基材料对电子烟储油棉进行改性,探索其对烟油的吸附及解吸的影响。将电子烟储油棉置于多巴胺水溶液中,得到表面吸附聚多巴胺的改性储油棉。以甲苯二异氰酸酯作偶联剂,使多巴胺改性储油棉表面吸附介孔材料。通过称量法、热失重分析,测定两种改性储油棉的烟油吸附与解吸效果。结果表明:(1)储油棉经多巴胺改性后,其饱和单位吸附量提高约50%。(2)在多巴胺改性储油棉基础上吸附介孔材料后,大孔径介孔材料使储油棉的饱和单位吸附量进一步提高8.57%,小孔径介孔材料使其提高3.23%。(3)改性储油棉的烟油完全解吸所需温度略有提高,但均小于储油棉自身分解温度275℃,表明烟油可以在储油棉发生自身分解前完全解吸。更多还原

【Abstract】 In order to investigate the oil adsorption and desorption properties, the oil-absorbing cotton used for electronic cigarette wick was modified by dopamine and mesoporous silica materials. The modified cotton, on which the polydopamine adsorbed, was obtained by immersing the oil-absorbing cotton in dopamine aqueous solution. The dopamine-modified cotton further adsorbed mesoporous silica material by using toluene diisocyanate as coupling agent. The abilities of oil adsorption and desorption of the two kinds of modified oilabsorbing cotton were measured through weighing and thermogravimetric analysis. The results showed that: 1)The saturation adsorption of dopamine-modified oil-absorbing cotton increased by about 50%. 2) It was further promoted by 8.57% and 3.23% after the dopamine-modified cotton was modified by large aperture or small aperture mesoporous materials, respectively. 3) The complete desorption temperatures of the modified oilabsorbing cotton rose a little, but were still under the decomposition temperature of oil-absorbing cotton,275 ℃. It indicated that the desorptive release of electronic liquids was complete before the decomposition of oil-absorbing cotton.更多还原