Preparation method of pore size-adjustable high-flux nanofiber composite ultra-filtration membrane
A nanofiber membrane and nanofiber technology, applied in the field of ultrafiltration membranes, can solve the problems of poor mechanical properties of membranes, intolerance to shear force, etc., and achieve the effects of high membrane stability, long service life, and improved mechanical properties.
Inactive Publication Date: 2016-10-12
上海洁晟环保科技有限公司
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The invention is a method for preparing a high-throughput nanofiber composite ultrafiltration membrane with adjustable pore size, which is characterized in that: the ultrafiltration membrane uses non-woven fabric as a support layer and a polymer nanofiber layer as a base layer 1. The pore size can be adjusted and the high flux nanofiber composite ultrafiltration membrane is composed of natural cellulose nanofibers as a gel layer. The present invention combines electrospinning technology and uniform glue coating method, adopts thermally cross-linked polyacrylic acid/polyvinyl alcohol to increase the strength of the film, and adjusts the coating amount and baking conditions of cellulose nanofibers, which can be adjusted according to actual application needs Nanofiber composite ultrafiltration membranes with different pore sizes were prepared. It has been determined that the pore size of the ultrafiltration membrane prepared by the method of the present invention can be adjusted to 5-100 nm, and the pure water permeation flux of the corresponding membrane is 80-2000 L/h m under the working pressure of 0.2 MPa. 2 .
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Property | Measurement | Unit |
Aperture size | 5.0 ~ 100.0 | nm |
Average pore size | 5.0 | nm |
Average pore size | 50.0 | nm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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