This article presents a novel procedure for preparing porous membranes from water-soluble polymers involving the formation of a Pickering emulsion. Gelatin is a biodegradable biopolymer obtained by the partial hydrolysis of collagen. A biopolymer such as gelatin is capable of adsorbing at an oil/water interface, resulting in decreased interfacial energy. Hence, gelatin is widely employed as an alternate for synthetic surfactants to stabilize emulsions in the food industry. However, high-molecular-weight gelatin leads to large emulsion droplets and poor emulsion stability. The amphoteric nature of graphene oxide (GO) nanosheets was helpful in stabilizing the oil/water interface and allows for the preparation of a stable gelatin/GO emulsion. Membranes fabricated using gelatin/GO have a uniformly distributed porous structure. However, prepared membranes are highly hydrosoluble, so the membranes were cross-linked without affecting their morphology. XRD results evidenced that gelatin effectively exfoliated the graphite oxide which is essential to stabilizing the emulsion. Fabricated gelatin/GO membranes possess uniformly distributed pores and are highly stable in aqueous solution. Pure water filtration tests were conducted on the membranes. The permeability results proved that the membranes fabricated by a Pickering emulsion are promising materials for filtration.

中文翻译：

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从氧化石墨烯稳定的Pickering乳液中获得的多孔明胶膜

本文提出了一种由水溶性聚合物制备多孔膜的新方法，该方法涉及形成Pickering乳液。明胶是通过胶原蛋白的部分水解获得的可生物降解的生物聚合物。生物聚合物（例如明胶）能够在油/水界面处吸附，从而降低界面能。因此，明胶被广泛用作合成表面活性剂的替代品，以稳定食品工业中的乳液。但是，高分子量明胶导致较大的乳液液滴和较差的乳液稳定性。氧化石墨烯（GO）纳米片的两性性质有助于稳定油/水界面，并允许制备稳定的明胶/ GO乳液。使用明胶/ GO制造的膜具有均匀分布的多孔结构。然而，制备的膜是高度水溶性的，因此该膜可以在不影响其形态的情况下进行交联。XRD结果证明明胶有效地剥落了氧化石墨，这对于稳定乳液是必不可少的。制成的明胶/ GO膜具有均匀分布的孔，并且在水溶液中高度稳定。在膜上进行纯水过滤测试。渗透性结果证明，由Pickering乳液制备的膜是有前途的过滤材料。制成的明胶/ GO膜具有均匀分布的孔，并且在水溶液中高度稳定。在膜上进行纯水过滤测试。渗透性结果证明，由Pickering乳液制备的膜是有前途的过滤材料。制成的明胶/ GO膜具有均匀分布的孔，并且在水溶液中高度稳定。在膜上进行纯水过滤测试。渗透性结果证明，由Pickering乳液制备的膜是有前途的过滤材料。