论文部分内容阅读
Long and narrow slit-shaped pores are predicted to have enhanced permeation and selectivity as well as better fouling resistance in membrane-based separation compared to commonly used circular pores.However,it remains an unsolved challenge for the massive production of slit-shaped pores with sub-100 nm pore widths.We report,for the first time,the efficient production of membranes containing densely packed slitted pores with pore width＜15 nm from block copolymers (BCPs).The slit-shaped pores are nondestructively created by selectively swelling in-plane aligned block copolymers.Such membranes have high porosity up t0 34 ％.uniform pore width down to ＜15 nm,and hydrophilic surfaces.The 42-nm-thick membranes containing two layers of slit-shaped pores can be transferred onto macroporous substrates,producing robust composite membranes with the BCP membranes as the selective layers.Thus-obtained membrane exhibits a water flux of 10-100 times higher than commercial membranes,a sharp selectivity,and an intrinsically pH-sensitive functionality.