As featured in:www.rsc.org/MaterialsC Showcasing research from the group of Prof. Yongjin Li, College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University.Block-assembling: a new strategy for fabricating conductive nanoporous materials from nanocomposites based on a melt-miscible crystalline/crystalline blend and MWCNTsConductive nanoporous materials were obtained from a "block-assembling" structure in ternary nanocomposites comprised of a melt-miscible crystalline/crystalline blend and MWCNTs, by selective removal of the component with poor capability of crystallization. See Yongjin Li et al., J. Mater. Chem. C, 2015, 3, 8510. 8510 | J. Mater. Chem. C, 2015, 3, 8510--8518 This journal is In this work, we focus on exploring a new method to prepare conductive nanoporous polymeric materials, by simply incorporating multi-walled carbon nanotubes (MWCNTs) into melt-miscible poly(L-lactic acid)/ poly(oxymethylene) (PLLA/POM) blends. The POM components in the ternary nanocomposites crystallize first to form ''nano-hybrid shish-kebab (NHSK)'' structures at a high temperature in the presence of MWCNTs, with the simultaneous exclusion of poorly crystallizable PLLA chains into the intra-NHSK regimes.The subsequent PLLA crystallization in the intra-NHSK regimes is also nucleated on the surface of MWCNTs and transforms the final crystal morphology into ''ternary-hybrid shish-kebab (THSK)'' superstructures.Therefore, a ''binary-polymer-decoration'' of MWCNTs, named ''block-assembling'', is achieved. Such a novel ''block-assembling'' structure is further used to fabricate conductive nanoporous polymeric materials with a unique interposition structure of CNTs in the inner wall of the internal pores after the removal of the PLLA components in the ternary nanocomposites.