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化工进展  2015 

多壁碳纳米管/聚乙烯醇缩丁醛复合相变纤维的制备与性能

DOI: 10.16085/j.issn.1000-6613.2015.10.026

Keywords: 微流体学,相变,,纤维,导热性能

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Abstract:

利用微流控技术成功制备了以石蜡(RT27)为芯层、共混多壁碳纳米管(MWNT)的聚乙烯醇缩丁醛(PVB)为鞘层的核-鞘型MWNT/PVB复合相变纤维。系统研究了MWNT的含量对复合相变纤维的形貌、力学性能、热性能、导热性能的影响。研究结果表明,MWNT的加入显著提高了MWNT/PVB复合相变纤维的力学性能和导热性能。随着MWNT含量增加,MWNT/PVB复合相变纤维的断裂强度先增大后减小。当MWNT含量为0.5%时,复合相变纤维的断裂强度最大,比未添加MWNT相变纤维的断裂强度提高了28.27%。在42℃高温下,比较缠绕MWNT含量为4%的复合相变纤维和缠绕未添加MWNT相变纤维的模型帽子的内部温度,前者从相同的初始温度17℃升温到达石蜡RT27的相变温度(27℃)所用的时间比后者减少了25%。研究结果为制备具有良好导热性能、高强度和稳定、快速调温性能的相变纤维提供重要的实验参考和指导。

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