| 摘要 |
PROBLEM TO BE SOLVED: To provide a polymeric membrane that is used for filtering various fluids and realizes high throughput performance.SOLUTION: A membrane comprises a single layer having: a first microporous surface; a second microporous surface; and a porous bulk between the first microporous surface and the second microporous surface. The bulk comprises: a first set of pores having outer rims, prepared by removing introduced dissolvable silica nanoparticles, the first set of pores having a first controlled pore size; a second set of pores connecting the outer rims of the first set of pores, the second set of pores having a second controlled pore size; and a polymer matrix supporting the first set of pores. The first controlled pore size is greater than the second controlled pore size. The first and/or second microporous surface comprises a neutrally charged, a negatively charged, or a positively charged surface. |
