A generic method to synthesise graphitic carbon coated nanoparticles in large scale and their derivative polymer nanocomposites.
A generic method to synthesise graphitic carbon coated nanoparticles in large scale and their derivative polymer nanocomposites.
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DOI：
10.1038/s41598-017-12200-1
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发表时间：
2017-09-19
影响因子：
4.6
通讯作者：
Zhu Y
中科院分区：
文献类型：
--
作者：
Wang N;Yang Z;Xu F;Thummavichai K;Chen H;Xia Y;Zhu Y
采用旋转化学气相沉积（RCVD）技术原位合成了大尺寸碳包覆非磁性金属氧化物纳米颗粒（NPs），获得了厚度在1-5 nm之间的可控包覆层。该技术已将传统的化学气相沉积（CVD）生产从mg级提高到每批10克，具有连续生产的潜力。包覆内核金属氧化物NP的所得光滑且均匀的C涂层由结晶良好的石墨层制成，如通过电子显微镜成像、电子色散谱元素线扫描、X射线粉末衍射和拉曼光谱所证实的。使用尼龙12作为示例基质，我们进一步证明了将C涂覆的复合NP包含到基质中提高了热导率，从纯尼龙12的0.205 W·m-1·K-1提高到4wt% C涂覆的ZnO复合材料的0.305 W·m-1·K-1，此外在2wt%添加时拉伸强度提高了27%。
A versatile Rotary Chemical Vapour Deposition (RCVD) technique for the in-situ synthesis of large scale carbon-coated non-magnetic metal oxide nanoparticles (NPs) is presented, and a controllable coating thickness varying between 1–5 nm has been achieved. The technique has significantly up-scaled the traditional chemical vapour deposition (CVD) production for NPs from mg level to 10 s of grams per batch, with the potential for continuous manufacturing. The resulting smooth and uniform C-coatings sheathing the inner core metal oxide NPs are made of well-crystallised graphitic layers, as confirmed by electron microscopy imaging, electron dispersive spectrum elemental line scan, X-ray powder diffractions and Raman spectroscopy. Using nylon 12 as an example matrix, we further demonstrate that the inclusion of C-coated composite NPs into the matrix improves the thermal conductivity, from 0.205 W∙m−1∙K−1 for neat nylon 12 to 0.305 W∙m−1∙K−1 for a 4 wt% C-coated ZnO composite, in addition to a 27% improvement in tensile strength at 2 wt% addition.