为验证微波场强化植物提取的"膜超滤"假说机理,以聚醚砜超滤膜为研究对象,以膜通量为考察指标,结合膜和黄芪饮片显微结构的扫描电镜(SEM)表征,讨论了微波辐射对黄芪水提液超滤过程的影响.结果表明,驱动压力相同,微波辅助超滤30 min时,膜通量下降到初始值的57.36%,且膜表面观察不到凝胶层;而常规超滤30 min,膜通量已下降到初始值的30.29%,且膜表面覆盖一层约20μm的凝胶层.说明微波辐射能够减弱浓差极化现象,促进膜超滤过程中的物质传递.
参考文献
[1] | Garcia-Ayuso LE.;de Castro MDL. .A multivariate study of the performance of a microwave-assisted Soxhlet extractor for olive seeds[J].Analytica chimica acta,1999(3):309-316. |
[2] | 王娟,沈平孃,沈永嘉.微波辅助萃取葛根和刺五加微观机制的研究[J].中草药,2004(01):31-33. |
[3] | 杨俊红;邸倩倩;郭锦棠.膜超滤模型对药用植物微波辅助提取机理研究的意义[A].南京,2006:755-759. |
[4] | 杨俊红,张恒春,郭锦棠,邸倩倩,张铁军.微波作用对黄芪水提液分子量分布特征的影响[J].工程热物理学报,2007(04):649-651. |
[5] | Kobayashi T;Chai X;Fujii N .Ultrasound Enhanced Cross Flow Membrane Filtration[J].Separation and Purification Technology,1999,17(01):31-40. |
[6] | Named N;0ussedik S;Yeddou R .Enhancement of Ultra-Filtration Flux by Coupling Static Turbulence Promoter and Electric Field[J].Separation and Purification Technology,1999,17(03):203-211. |
[7] | Chen XB;Yang WS;Liu J;Lin LW .Synthesis of zeolite NaA membranes with high permeance under microwave radiation on mesoporous-layer-modified macroporous substrates for gas separation[J].Journal of Membrane Science,2005(1/2):201-211. |
[8] | Nalai Y;Tsujita Y;Yoshimizu H et al.Control of Gas Permeability for Cellular Acetate Membrane by Mi-crowave Irradiation[J].Desalination,2002,145:375-377. |
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