Nano‐engineering of high‐performance PA6.6 nanocomposites by the integration of CVD‐grown carbon fiber on graphene as a bicomponent reinforcement by melt‐compounding
Nano‐engineering of high‐performance PA6.6 nanocomposites by the integration of CVD‐grown carbon fiber on graphene as a bicomponent reinforcement by melt‐compounding
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通过熔融复合将 CVD 生长的碳纤维集成到石墨烯上作为双组分增强材料，实现高性能 PA6.6 纳米复合材料的纳米工程
DOI：
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发表时间：
2019
影响因子：
3
通讯作者：
Burcu Saner Okan
中科院分区：
文献类型：
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作者：
Elcin Cakal Sarac;Leila Haghighi Poudeh;Jamal Seyyed Monfared Zanjani;Z. Pehlivan;F. Cebeci;I. Aydin;Y. Menceloğlu;Burcu Saner Okan
在这项研究中，长的碳纳米纤维（CNFs）生长在石墨烯纳米片（GNP）的化学气相沉积（CVD）技术，开发三维（3D）的双组分纳米结构。研究了CVD前后石墨烯的结构和性能。X射线光电子能谱分析表明，Fe 2 O3催化剂表面碳原子的沉积形成了Fe-C键。该杂化添加剂首次被用作熔融共混的增强剂，以制备具有增强的力学和热性能的PA6.6基纳米复合材料。GNP和CNF-GNP都具有足够的表面氧官能团以改善与聚酰胺基质的界面相互作用，从而提供良好的润湿性。此外，纯GNP和其具有CNF的双组分添加剂也充当成核剂并允许纳米复合结构中的晶体生长。通过在配混期间使用热动力学混合器通过施加高剪切速率实现纳米颗粒的均匀分散。机械结果表明，通过添加0.5重量%的CNF-GNP杂化添加剂，分别获得了23%和34%的弯曲和拉伸模量值的改善。与纯PA6.6材料相比，所得PA6.6纳米复合材料的热变形温度和维卡软化温度得到改善，表明在较高的使用温度条件下的性能增强。采用化学气相沉积法在载铁石墨纳米片上成功地生长了碳纳米纤维，并将其与尼龙6.6熔融共混。力学结果表明，通过添加0.5wt% CNF-GNP混合添加剂，拉伸模量值提高了34%，因为它起到了成核剂的作用，并允许纳米复合材料结构中的晶体生长。
In this study, long carbon nanofibers (CNFs) were grown on graphene nanoplatelets (GNPs) by chemical vapor deposition (CVD) technique to develop three-dimensional (3D) bicomponent nanostructures. The structure and properties of graphene before and after CVD process were investigated in details. X-ray photoelectron analysis depicted the formation of Fe-C bonds by the deposition of carbon atoms on the catalyst surface of Fe2O3. This hybrid additive was firstly used as a reinforcing agent in melt compounding to fabricate PA6.6-based nanocomposites with enhanced mechanical and thermal properties. Both GNP and CNF-GNP have enough surface oxygen functional groups to improve the interfacial interactions with polyamide matrix and thus provide good wettability. Also, both neat GNP and its bicomponent additive with CNF also acted as a nucleating agent and allowed the crystal growth in nanocomposite structure. Homogeneous dispersion of nanoparticles was achieved by using thermokinetic mixer during compounding by applying high shear rates. Mechanical results showed that 23 and 34% improvement in flexural and tensile modulus values, respectively, was attained by the addition of 0.5 wt % CNF-GNP hybrid additive. The heat distortion temperature and Vicat softening temperature of the resulting PA6.6 nanocomposites were improved compared to neat PA6.6 material indicating performance enhancement at higher service temperature conditions. CNF was successfully grown on Fe-loaded GNP by CVD method and this hybrid additive was compounded with PA6.6 by melt-mixing process. Mechanical results showed that 34% improvement in tensile modulus value was attained by the addition of 0.5 wt % CNF-GNP hybrid additive because it acted as a nucleating agent and allowed the crystal growth in the nanocomposite structure.
影响因子：
5.5
作者：
Liu, Yi;Cui, Li;Fong, Hao
通讯作者：
Fong, Hao