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为了从大豆油/丙酮混合油中回收丙酮，采用聚丙烯腈(PAN)膜作为基膜，以聚二甲基硅氧烷(PDMS)为分离层并掺入多层氧化石墨烯(GO)，制备了PAN/PDMS-GO混合基质膜(mixed-matrix membranes,MMMs)，并探究GO掺入量对复合膜的物理化学性质及溶剂回收性能的影响。结果表明：GO表面存在大量的羟基和羧基，在铂金(Pt)催化剂的作用下与PDMS交联剂的硅氢键发生反应，GO的掺入不仅可以降低膜的水接触角，提高对丙酮的溶解度，还增大了PDMS的交联密度；掺入适量GO后，PDMS层的力学性能和热稳定性均有所提升，表明GO与PDMS具有非常好的相容性；随着GO掺入量的增加，MMMs对丙酮的渗透通量下降，而油截留率提高，当GO质量分数为0.07%时，在1.8 MPa的工作压力下，PAN/PDMS-GO MMMs具有最佳的分离性能，对丙酮的渗透通量为3.87 kg/(m2·h)，油截留率高达100%，展现出在工业生产大豆油中溶剂回收方面的应用潜力。
Abstract：To recover acetone from soybean oil/acetone blend, PAN/PDMS-GO mixed-matrix membranes(MMMs) were prepared using polyacrylonitrile(PAN) membranes as the base membranes, polydimethylsiloxane(PDMS) as the separator layer and were doped with multilayer graphene oxide(GO). The effects of GO doping on the physicochemical properties and solvent recovery performance of the composite membranes were investigated experimentally. The results showed that GO doping not only reduced the water contact angle of the membranes and increased the solubility of acetone, but also increased the crosslink density of PDMS. This is due to the presence of a large number of hydroxyl and carboxyl groups on the surface of GO, which reacted with the silicon hydrogen bonding of the PDMS cross-linker in the presence of a platinum(Pt) catalyst. The mechanical properties and thermal stability of the PDMS layer were improved after GO doping, indicating that GO has excellent compatibility with PDMS.As the GO doping increased, the permeation flux of MMMs to acetone decreased while the oil retention increased.When the mass fraction of GO doped was 0.07%, the PAN/PDMS-GO MMMs exhibited the best separation performance at an operating pressure of 1.8 MPa, with a permeation flux of 3.87 kg/(m2·h) to acetone and an oil retention rate of 100%, demonstrating the potential for application in solvent recovery in industrial production of soybean oil.
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基本信息:
中图分类号:TQ051.893;TQ224.223
引用信息:
[1]孟建强,余波,王超,等.PAN/PDMS-GO混合基质膜用于大豆油生产中丙酮的回收[J].天津工业大学学报,2026,45(02):24-30+38.
基金信息:
国家自然科学基金项目(22075206)
2026-04-25
2026-04-25