| 内容提要: |
Surfaces simultaneously bearing antifouling and self-cleaning abilities are broadly employed by living systems to sustain diverse powerful functions. Integrating these features into synthetic surfaces emerges is highly desirable and critically important in the development of various advanced surface-relevant technologies during medical, industrial, and environmental applications. We report in situ engineered porous membranes by free and forced surface segregation, where the hydrophilic (typically poly(ethylene oxide)) brushes segregate freely onto water/membrane interface due to the intrinsic superior hydrophilicity and low surface energy (typically fluorinated or polydimethylsiloxane) brushes enrich on the membrane surface due to the dragging effort of hydrophilic brushes. These external surface with hydrophilic and low surface energy polymer brushes endowing membranes with superior antifouling (fouling resistant) and self-cleaning (fouling release) abilities When utilized for treatment of wastewater containing protein, oil/water emulsion or cell suspension, the membrane fouling is exquisitely suppressed: hydrophilic brushes generate hydration layers constructing a protective screen to reduce the direct interaction between foulants and membrane surfaces, endowing the surface superior antifouling ability; low surface energy brushes form amounts of non-adhesive microdomians on the membrane surfaces to minimize the intermolecular forces of interactions between the foulants and the membrane surface, rendering the surfaces with desirable self-cleaning ability. |