In this work, the well-dispersed functionalized MWCNTs (f-MWCNTs), which was fabricated by simply decorating the polyether amine (M2070) and organosilanes (KH560) chains, has been applied as filler in preparation of the epoxy/f-MWCNTs microcellular foam through batch foaming process with supercritical carbon dioxide (scCO₂). Compared with acidified MWCNT (acid-MWCNTs) without decorating the organic groups, the f-MWCNTs achieved more uniform dispersion in epoxy matrix, acted as plasticizing agent to reduce the glass transition temperature (T_g) of epoxy/f-MWCNTs composites, as well as increasing the composite CO₂ adsorption ability, hence greatly enhanced the foamability of epoxy/f-MWCNTs composite. By adding 20 wt% f-MWCNTs, the average cell size reduced from 46.32 μm to 0.21 μm and cell density increased from 2.70 × 10⁷ cell/cm³ to 2.74 × 10¹³ cell/cm³, respectively. In addition, the epoxy/f-MWCNTs microcellular foams presented enhanced electrical conductivity to 5.2 × 10⁻⁴ S/m, electromagnetic interference shielding effectiveness (EMI SE) to 22.73 dB and compressive strength to 26.46 MPa.

在这项工作中，通过简单装饰聚醚胺（M2070）和有机硅烷（KH560）链而制备的分散良好的官能化MWCNT（f-MWCNT）已用作制备环氧/ f-MWCNTs微孔填料的填料。通过使用超临界二氧化碳（scCO ₂）的分批发泡过程发泡。与未装饰有机基团的酸化MWCNT（酸性MWCNT）相比，f-MWCNT在环氧基体中实现了更均匀的分散，并作为增塑剂降低了环氧/ f-MWCNTs复合材料的玻璃化转变温度（T _g）。以及增加复合CO ₂吸附能力，因此大大增强了环氧/ f-MWCNTs复合材料的发泡性。通过添加20wt％的f-MWCNT，平均泡孔尺寸从46.32μm减小到0.21μm，并且泡孔密度分别从2.70×10 ⁷孔/ cm ³增加到2.74×10 ¹³孔/ cm ³。此外，环氧/ f-MWCNTs微孔泡沫的电导率提高到5.2×10 ^-4 S / m，电磁干扰屏蔽效率（EMI SE）达到22.73 dB，抗压强度达到26.46 MPa。