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New approach to the formation of polyimide ultrafiltration membranes involving modified polyacrylonitrile
Abstract A new approach to the formation of asymmetric ultrafiltration membranes based on insoluble rigid-chain aromatic polyimide (PI) and involving polyacrylonitrile modified by partial cyclization (m-PAN) has been studied. It has been found that m-PAN exerts a favorable effect on the membrane formation and composition: it (i) promotes fast precipitation at the stage of wet formation; (ii) acts as an imidization catalyst that allows for decreasing temperature at the stage of solid-phase thermal imidization; and (iii) it remains as a full-fledged component in the PI/m-PAN membrane. It was shown that up to 20 wt % m-PAN can be effectively introduced into the membrane composition. The membranes have been calibrated using a model mixture of proteins with different molecular weights. The structure, permeability to water, and thermomechanical properties of the membranes have been studied.
New approach to the formation of polyimide ultrafiltration membranes involving modified polyacrylonitrile
Abstract A new approach to the formation of asymmetric ultrafiltration membranes based on insoluble rigid-chain aromatic polyimide (PI) and involving polyacrylonitrile modified by partial cyclization (m-PAN) has been studied. It has been found that m-PAN exerts a favorable effect on the membrane formation and composition: it (i) promotes fast precipitation at the stage of wet formation; (ii) acts as an imidization catalyst that allows for decreasing temperature at the stage of solid-phase thermal imidization; and (iii) it remains as a full-fledged component in the PI/m-PAN membrane. It was shown that up to 20 wt % m-PAN can be effectively introduced into the membrane composition. The membranes have been calibrated using a model mixture of proteins with different molecular weights. The structure, permeability to water, and thermomechanical properties of the membranes have been studied.
New approach to the formation of polyimide ultrafiltration membranes involving modified polyacrylonitrile
Polotskaya, G. A. (author) / Meleshko, T. K. (author) / Novoselova, A. V. (author) / Gofman, I. V. (author) / Polotsky, A. E. (author)
Petroleum Chemistry ; 52 ; 527-532
2012-11-30
6 pages
Article (Journal)
Electronic Resource
English
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