Baskakov Sergey A, Baskakova Yulia V, Kabachkov Eugene N, Zhidkov Mikhail V, Alperovich Anastasia V, Krasnikova Svetlana S, Chernyaev Dmitrii A, Shulga Yury M, Gutsev Gennady L
Federal Research Center of Problem of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russia.
Osipyan Institute of Solid State Physics RAS, 142432 Chernogolovka, Moscow Region, Russia.
Materials (Basel). 2024 May 24;17(11):2538. doi: 10.3390/ma17112538.
A special technique has been developed for producing a composite aerogel which consists of graphene oxide and soy wax (GO/wax). The reduction of graphene oxide was carried out by the stepwise heating of this aerogel to 250 °C. The aerogel obtained in the process of the stepwise thermal treatment of rGO/wax was studied by IR and Raman spectroscopy, scanning electron microscopy, and thermogravimetry. The heat treatment led to an increase in the wax fraction accompanied by an increase in the contact angle of the rGO/wax aerogel surface from 136.2 °C to 142.4 °C. The SEM analysis has shown that the spatial structure of the aerogel was formed by sheets of graphene oxide, while the wax formed rather large (200-1000 nm) clumps in the folds of graphene oxide sheets and small (several nm) deposits on the flat surface of the sheets. The sorption properties of the rGO/wax aerogel were studied with respect to eight solvent, oil, and petroleum products, and it was found that dichlorobenzene (85.8 g/g) and hexane (41.9 g/g) had the maximum and minimum sorption capacities, respectively. In the case of oil and petroleum products, the indicators were in the range of 52-63 g/g. The rGO/wax aerogel was found to be highly resistant to sorption-desorption cycles. The cyclic tests also revealed a swelling effect that occurred differently for different parts of the aerogel.
已经开发出一种特殊技术来制备由氧化石墨烯和大豆蜡（GO/蜡）组成的复合气凝胶。通过将这种气凝胶逐步加热到250°C来实现氧化石墨烯的还原。通过红外光谱、拉曼光谱、扫描电子显微镜和热重分析对在rGO/蜡的逐步热处理过程中获得的气凝胶进行了研究。热处理导致蜡含量增加，同时rGO/蜡气凝胶表面的接触角从136.2°增加到142.4°。扫描电子显微镜分析表明，气凝胶的空间结构由氧化石墨烯片形成，而蜡在氧化石墨烯片的褶皱中形成相当大（200 - 1000纳米）的团块，并在片的平坦表面上形成小（几纳米）的沉积物。研究了rGO/蜡气凝胶对八种溶剂、油和石油产品的吸附性能，发现二氯苯（85.8克/克）和己烷（41.9克/克）分别具有最大和最小吸附容量。对于油和石油产品，指标在52 - 63克/克范围内。发现rGO/蜡气凝胶对吸附 - 解吸循环具有高度抗性。循环测试还揭示了气凝胶不同部位出现的不同膨胀效应。
