| Summary: | 碩士 === 逢甲大學 === 纖維與複合材料學系 === 105 === Nowadays, industrial waste oil and oil spill into the water cycle of the ecological environment has a great impact, so the topic “how to separate oil from the water effectively” is worth exploring.
In this experiment, the modified Hummer's method was used to prepare the graphite oxide. We mixed the 5, 10 ml oxidized graphite / water suspension with 10 g of polyvinyl alcohol into the polyurethane and wood pulp sponge pores to prepare a composite with three-dimensional structure. Through the thermal decomposition of 190, 210℃ carbonization and self-crosslinking to form a composite graphene / carbon aerogels which was compared with that of the graphene aerogels prepared by sol-gel method with 3 g isocyanate bridging agent, oxidized graphite / water suspension and thermal decomposition at 370℃. Then, evaluate the feasibility of the oil-water separation.
The experimental results showed that the sponges could effectively reduce the heat shrinkage and structural collapse caused by the heat treatment process and formed a three-dimensional porous structure of graphene aerogel. This method is beneficial to the future industrial process of graphene aerogel production. The thermogravimetric analysis showed that the sponge structure is carbonized by thermal decomposition, and founded that the reduced graphene had chemical crosslinking with the carbon sponge via the infrared spectrum analysis. Contact angle tests showed that the oil and water separation was successfully fulfilled through the water droplets and oil droplets in-betweens. The oil adsorption capacity of composite carbon aerogels in weight of itself were higher than three times of the graphene aerogels prepared by the sol gel process. The performance of the composite carbon aerogels increased with the increase of the amount of the graphite oxide. A sodium oxide washing tests were made for exploring the re-use ability of the product.
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