【摘 要】
：
A novel method of fabricating composite mosaic membranes was studied on the basis of interfacial polymerization (IP) by coating a thin selective layer onto the
【机 构】
：
Department of Chemical Engineering,Membrane Technology Group
论文部分内容阅读
A novel method of fabricating composite mosaic membranes was studied on the basis of interfacial polymerization (IP) by coating a thin selective layer onto the surface of a micro-porous hollow-fiber membrane, in which,2,5-diaminobenzene sulfonic acid was used as one monomer of the IP reaction, and a mixture of trimesoyl chloride(TMCI) and 4-(chloromethyl) benzoyl chloride as the other monomer. Through the IP reaction a thin selective layer with negatively charged groups could be first formed on the polyethersulfone (PES) support membrane. Then trimethylamine solution was introduced to modify the IP layer through a quaternization reaction. Thus the selective layer of this composite membrane contained both negatively charged and positively charged groups to perform the mosaic functionality.Characterization of the composite mosaic membranes was carried out through permeation experiments using different inorganic salts and dyes. The experimental results showed that the membranes could permeate both mono- and bi-valent inorganic salts, but reject larger organic molecules. Such a mosaic membrane is potentially useful for the separation of salts from water-soluble organics, especially in dye and textile industries.
其他文献
The polymerization of the inverse microemulsions composed of methyl methacrylate,acrylic acid, sodium dodecyl sulfate and water was monitored by refractometer,
Nanofibrous carbonaceous materials (NFC) as a new class of materials having many applications, can catalyze the selective oxidation of H2S to sulfur. The correl
The introduction of 2′,6′-dimethyl-L-tyrosine(Dmt) [1] at the N-terminus of Tyr-Tic(1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid)-containing δ-opioid ant
Some techniques in the Geometric Measure Theory are used to study the hypersurfaces in Euclidean spaces and some fundamental properties with this subject are di
In this paper, we introduce the notion of bounded Betti numbers, and show that the bounded Betti numbers of a closed Riemannian n-manifold (M, g) with Ric (M)
Measurements were performed in spring 2001 and 2002 to determine the characteristics of soil dust in the Chinese desert region of Dunhuang, one of the ground si
A novel Ni-capped complex H4{[Ni(H2O)3]2[CeMo12O42]}·13.5H2O has been synthe- sized, which is the first Silverton-type anion capped with two Ni units via three
Chondrus is an economically important red algae widely used for food and biochemical purpose. It early development is crucial for the culture and seedling propa
The flow characteristics of a 2D slot jet vertically impinging on free surfaces are numerically investigated by the Large Eddy Simulation (LES) with a dynamic S
A new quantum communication scheme based on entanglement swapping is presented. Simplified calculation symbols are adopted to realize the process. Quantum key d