Coaxial electrospinning process toward optimal nanoparticle dispersion in polymeric matrix,Polymer Composites

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Coaxial electrospinning process toward optimal nanoparticle dispersion in polymeric matrix
Polymer Composites ( IF 4.8 ) Pub Date : 2021-01-17 , DOI: 10.1002/pc.25924
Francisco Sebastian Navarro Oliva ₁ , Léo Picart ₁ , Christopher Y. Leon‐Valdivieso ₁ , Ahmed Benalla ₁ , Luc Lenglet ₂ , Alejandro Ospina ₁ , Jacques Jestin ₃ , Fahmi Bedoui ₁

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Nanoreinforced polymers have gained popularity in the last decades since they exhibit enhanced properties (compared to pristine polymers) that are useful in a wide range of applications. Unfortunately, dispersion of nanoparticles (NPs) into polymeric matrices is a major problem since they tend to form agglomerates, limiting the improvement of properties and further applications. In this work, we propose the use of coaxial electrospinning as one‐step method to disperse NPs in a polymeric matrix. Particularly, iron oxide (Fe₃O₄) NP with a monomodal and bimodal size distributions were dispersed in polyvinylidene fluoride (PVDF), a material that is well known for its improved piezoelectric properties when it is processed via electrospinning. The results indicate that the incorporation of NP modified the polymeric fiber depending on their surface‐to‐volume ratio (smaller NP promoted smaller fiber size). Moreover, transmission electron microscopy revealed a good NP dispersion in the polymer, especially for the smallest NP size (monomodal). Finally, each NP size distributions were well preserved in the electrospun mats compared to the initial NP solutions, demonstrating the suitability of this technique for the fabrication of nanoreinforced PVDF structures with tailored NP size. Overall, this method could represent a facile and practical alternative to fabricate materials with piezoelectric/super‐paramagnetic properties.

中文翻译：

同轴静电纺丝工艺可实现聚合物基质中纳米粒子的最佳分散

纳米增强聚合物由于具有增强的性能（与原始聚合物相比）而在近几十年中获得了普及，这些性能可在广泛的应用中使用。不幸的是，将纳米颗粒（NP）分散到聚合物基质中是一个主要问题，因为它们易于形成团聚物，从而限制了性能的改进和进一步的应用。在这项工作中，我们建议使用同轴静电纺丝作为一步法将NP分散在聚合物基质中。特别是氧化铁（Fe ₃ O ₄将具有单峰和双峰尺寸分布的NP分散在聚偏二氟乙烯（PVDF）中，该材料因通过静电纺丝加工而具有改善的压电特性而闻名。结果表明，NP的掺入根据聚合物的表面体积比对聚合物纤维进行改性（较小的NP促进较小的纤维尺寸）。此外，透射电子显微镜显示出聚合物中良好的NP分散性，特别是对于最小的NP尺寸（单峰）。最后，与初始NP解决方案相比，每个NP尺寸分布在电纺垫中都得到了很好的保留，这表明该技术适用于制造具有定制NP尺寸的纳米增强PVDF结构。全面的，

更新日期：2021-03-08

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