Improving the mechanical properties of laser-sintered polyamide 12 through incorporation of carbon nanotubes
Improving the mechanical properties of laser-sintered polyamide 12 through incorporation of carbon nanotubes
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DOI：
10.1002/pen.23459
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发表时间：
2013-09-01
影响因子：
3.2
通讯作者：
Song, Mo
中科院分区：
文献类型：
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作者：
Bai, Jiaming;Goodridge, Ruth D.;Song, Mo
通过在聚酰胺12（PA 12）粉末颗粒表面包覆碳纳米管（CNTs），成功制备了具有球形形貌和合适粒径的纳米复合粉末。弯曲，冲击，和拉伸测试样品通过激光烧结的PA 12-CNT粉末显示没有变形和良好的定义。PA 12-CNT激光烧结部件的密度高于纯PA 12的密度，作者认为这主要是由于CNT颗粒对激光的吸收更高。与激光烧结的PA 12部件相比，PA 12-CNT部件显示出增强的弯曲、冲击和拉伸性能，而不牺牲断裂伸长率。这种增强可能归因于CNT在PA 12基质中的良好分散和更致密的激光烧结部件。考虑到使用的CNT的低重量百分比（0.1重量%），似乎在这项工作中使用的方法是生产用于激光烧结的聚合物纳米复合材料粉末的成本效益和有效的方式，同时保持激光烧结过程的最佳粉末形态并增强激光烧结部件的机械性能。Polym.工程索引，2013. (c)2013年塑料工程师学会
Well-dispersed nanocomposite powder with spherical morphology and suitable particle size for processing by laser sintering was successfully produced by coating polyamide 12 (PA12) powder particles with carbon nanotubes (CNTs). Flexural, impact, and tensile test specimens produced by laser sintering the PA12-CNT powder showed no distortion and good definition. The density of the PA12-CNT laser-sintered parts was higher than that of neat PA12, which the authors propose is mainly due to higher laser absorption by the CNT particles. Compared to the laser-sintered PA12 parts, PA12-CNT parts showed enhanced flexural, impact, and tensile properties without sacrificing elongation at break. This enhancement may be attributed to the good dispersion of the CNT in the PA12 matrix and denser laser-sintered parts. Considering the low weight percentage of CNT used (0.1 wt%), it would seem that the method used in this work is a cost efficient and effective way to produce polymer nanocomposite powders for laser sintering, while maintaining the optimum powder morphology for the laser sintering process and enhancing the mechanical properties of the laser-sintered part. POLYM. ENG. SCI., 2013. (c) 2013 Society of Plastics Engineers