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Polycarbosilane-derived SiC/single-walled carbon nanotube nanocomposites

机译：聚碳硅烷衍生的SiC /单壁碳纳米管纳米复合材料

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摘要

One of the key issues for the development of high toughness carbon nanotube (CNT) reinforced composites is the control of the interfacial bond between the CNT and the matrix. Here, we introduce a novel technique to facilitate the homogeneous coating of single-walled carbon nanotube (SWCNT) bundles with polycarbosilane (PCS)-derived SiC nanoparticles. The PCS dissolved in n-hexane was used as a precursor for SiC nanoparticles. The results obtained from XRD, TEM and EDXS analyses confirmed the formation of beta-SiC nanoparticles of about 20 nm in diameter, which possessed a relatively homogeneous distribution on the SWCNT bundles. It was shown that the number of SiC nanoparticles per unit of SWCNT surface area could be adjusted by changing the weight ratio of PCS and SWCNTs. This approach may provide a useful route for the preparation of SiC/SWCNT nanocomposites that have a tunable interface property with the matrix and potentially with an enhanced anchor effect, which may have potential applications as a reinforcing element in CNT/ceramic composites.
机译：开发高韧性碳纳米管（CNT）增强复合材料的关键问题之一是控制CNT与基体之间的界面键。在这里，我们介绍了一种新技术，以促进单壁碳纳米管（SWCNT）束与聚碳硅烷（PCS）衍生的SiC纳米粒子的均匀涂覆。溶解在正己烷中的PCS用作SiC纳米颗粒的前体。通过XRD，TEM和EDXS分析获得的结果证实了直径约20 nm的β-SiC纳米颗粒的形成，该纳米颗粒在SWCNT束上具有相对均匀的分布。结果表明，可以通过改变PCS和SWCNT的重量比来调节每单位SWCNT表面积的SiC纳米颗粒的数量。该方法可以为制备具有与基质的可调界面性质并且潜在地具有增强的锚定效应的SiC / SWCNT纳米复合材料提供有用的途径，其可以潜在地用作CNT /陶瓷复合材料中的增强元素。

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