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Porous multi-walled carbon nanotube(MWCNT)based architectures added with various water-borne polyurethane(WPU)contents are manufactured by a facile freeze-drying method.The composites indicate a randomly and uniformly distributed micrometer-sized porous structure,and the pore size increases with decreasing density.The addition of small fractions of WPU in the porous MWCNT based architectures leads to greatly enhanced mechanical strength while reducing the conductivity little.