A graphene oxide (GO)-dispersed resorcinol–formaldehyde (RF) film coated on an activated carbon fabric (ACF) is synthesized for the first time as a microfiltration (MF) membrane for an efficient separation of oil-water emulsion. Physicochemical characterization of the prepared GO-RF/ACF membrane showed that the material contained pores of an average size 0.553 µm. The membrane contained an asymmetric internal structure, with the relatively narrower sized pores at the top surface of the membrane, conducive for retaining oil droplets, and the larger sized internally connected pores, conducive for water permeation. Inclusion of GO increased hydrophilic characteristics of GO-RF/ACF, attributed to the oxygen containing functional groups in the material. The contact angle measurements confirmed the hydrophilic (contact angle 56.15°) and oleophobic (contact angle 135.05°) characteristics of the material. Tested against a 10% (v/v) oil-water emulsion with the oil droplet size in the range 420–1200 nm, the dead-end MF tests showed the rejection efficiency of ~99.99% and permeate flux of ~158 L/m-h with the oil droplet size in the range 5–130 nm. The data clearly indicate an efficient separation of oil-water emulsion by MF using the GO-RF/ACF membrane prepared in this study, and its extended application in the membrane separation processes including the recovery of bioactive compounds from wastewater of the food- and agro-industries.

中文翻译：

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使用 ACF 支撑和 GO 分散的 RF 膜对油水乳液进行高效微滤


首次合成了涂覆在活性炭织物（ACF）上的氧化石墨烯（GO）分散的间苯二酚-甲醛（RF）薄膜作为微滤（MF）膜，用于有效分离油水乳液。所制备的 GO-RF/ACF 膜的物理化学表征表明，该材料含有平均尺寸为 0.553 µm 的孔。该膜具有不对称的内部结构，膜顶面孔径相对较窄，有利于截留油滴，而内部连通的孔径较大，有利于水的渗透。由于材料中含有含氧官能团，GO 的加入增加了 GO-RF/ACF 的亲水特性。接触角测量证实了材料的亲水性（接触角56.15°）和疏油性（接触角135.05°）特性。针对油滴尺寸在 420–1200 nm 范围内的 10% (v/v) 油水乳液进行测试，死端 MF 测试显示截留效率约为 99.99%，渗透通量约为 158 L/mh油滴尺寸在 5–130 nm 范围内。数据清楚地表明，使用本研究中制备的 GO-RF/ACF 膜，通过 MF 可以有效分离油水乳液，及其在膜分离过程中的广泛应用，包括从食品和农业废水中回收生物活性化合物。 - 行业。