制备新型本征绝缘高导热纳米填料及其复合材料是新材料研究领域的前沿课题之一。近期，氟化多壁碳纳米管（FMWCNT）展现出良好的绝缘性能，但其本征导热率仍然偏低，限制了其在绝缘导热领域的广泛应用。本项目基于直接氟化的手段，通过热裂解或催化裂解促使F2解离成原子氟，并在MWCNT管壁构建新缺陷作为原子氟层间扩散的通道和交联的桥接位点，通过原子历程的直接氟化反应诱发层间产生高活性自由基，进而发生耦合反应制备得到层间交联的FMWCNT。层间交联能为声子传递到内层管提供路径，可以克服利用传统的直接氟化方法制备的FMWCNT内层管不能有效参与导热的难题，得到本征绝缘高导热的纳米新填料。进一步将其与环氧树脂复合，利用层间交联FMWCNT表面C-F的衍生反应构筑高接枝密度的复合材料界面，降低界面热阻，制备得到轻质绝缘高导热纳米复合新材料。从而本项目可以为本征绝缘高导热纳米填料及其复合材料的制备提供借鉴。

Preparation of novel intrinsic electrical insulating and thermal conductive nanofillers and their composites is one of the frontier topics in the field of new materials research. Recent study pointed out that fluorinated mulltiwalled carbon nanotubes (FMWCNT) with good electrical insulating performance exhibited relatively low thermal conductivity, which limited its extensive application in the electrical insulating and thermal conductive field. Based on direct fluorination, this project tends to dissociate molecular F2 into atomic fluorine by thermal cracking or catalytic cracking. Meanwhile, defects are constructed on the wall of multi-walled carbon nanotubes (MWCNT) as diffusion channel for atomic fluorine and bridging sites between neighbouring carbon nanotube layers. As a result, the interlayer crosslinking FMWCNT can be achieved by the hinghly active radical coupling reaction between neighbouring carbon nanotube layers induced by atomic fluorination. Because interlayer chemical crosslinking can provide path for phonon propagation to inner tubes, the interlayer crosslinking FMWCNT exhibit superior thermal conductivity, which overcome the problem that the inner tubes of FMWCNT prepared by traditional direct fluorination method cannot participate in heat conduction effectively. Afterwards, the interlayer crosslinking FMWCNT are compounded with epoxy resin to fabricate epoxy/FMWCNT composites, and the interface thermal resistance is reduced through constructing high graft density interface based on derivative reaction of C-F bonds on the surface of FMWCNT. Consequently, a novel light nanocomposite material with electrical insulation and high thermal conductivity is prepared. Therefore, the research can provide reference for the preparation of intrinsic electrical insulating and thermal conductive nanofillers and their composites.