Various polymeric specimens used for mechanical testing. (a) Sheet-based TPMS cubic specimens (Reproduced with permission from [119]. Copyright 2017, Elsevier). (b) Strut- and sheet-based TPMS cubic specimens (Reproduced with permission from [120]. Copyright 2018, Wiley). (c) Sheet-based TPMS interpenetrating phase composite specimens (Reproduced with permission from [118]. Copyright 2016, Elsevier). (d) The steps of manufacturing the 3D MXene scaffold with polymer-based, strut-based Gyroidal TPMS [123]. (e) Hexagonal honeycomb structure (Reproduced with permission from [130]. Copyright 2018, Elsevier). (f) Strut-based cubic specimens (Reproduced with permission from [131]. Copyright 2021, Wiley). (g) Uniform and hybrid strut-based cubic specimens (Reproduced with permission from [79]. Copyright 2021, Elsevier).