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Use of a Polymer Blend To Disperse Large Amounts of Carbon-Based Fillers To Result in Nanocomposites with Superior Mechanical Properties and Outstanding Conductivities
Industrial & Engineering Chemistry Research ( IF 4.2 ) Pub Date : 2020-06-11 , DOI: 10.1021/acs.iecr.0c00989
Pei-Ni Song, Jin-Long Hong

Dispersion of large amounts of carbon fillers, such as graphene, mesocarbon microbeads, and multiwalled carbon nanotubes, in water provides a route to yield nanocomposites with superior mechanical properties and high conductivities for academic studies and practical applications. In this aspect, a self-healable polymer blend of poly(acrylic acid) (PAA) and poly(ethylene oxide) (PEO) is an excellent dispersant for carbon fillers, rendering nanocomposites with a large filler content (up to 90 wt %). As the carbon filler content increases from 10 to 90 wt %, the nanocomposites transfer from healable elastomers with a high fracture strain (up to 700%) into hard plastics with outstanding conductivities (up to 1.1 × 106 S m–1). Morphological investigations by scanning electron microscopy suggested the homogeneous dispersion of the carbon fillers in the PEO/PAA polymer blend. The experimental mechanical modulus and the conductivity of the nanocomposites as functions of the filler content can be approached by the theoretical Kolarik model and the scaling law, respectively, based on a co-continuous distribution of the carbon filler and the polymer blend. A theoretical evaluation provided in this study thereby lays the ground for future development in practical application fields.

中文翻译:

使用聚合物共混物分散大量的碳基填料,以产生具有优异机械性能和出色电导率的纳米复合材料

大量碳填充剂(例如石墨烯,中间碳微珠和多壁碳纳米管)在水中的分散提供了一种途径,可生产出具有优异机械性能和高电导率的纳米复合材料,用于学术研究和实际应用。在这个方面,聚丙烯酸(PAA)和聚环氧乙烷(PEO)的自修复聚合物共混物是用于碳填料的优异分散剂,使纳米复合材料具有较大的填料含量(至多90 wt%) 。随着碳填料含量从10到90 wt%的增加,纳米复合材料将从具有高断裂应变(高达700%)的可修复弹性体转移到具有出色电导率(高达1.1×10 6 S m –1)的硬质塑料中)。通过扫描电子显微镜的形态学研究表明碳填料在PEO / PAA聚合物共混物中的均匀分散。纳米复合材料的实验机械模量和电导率作为填料含量的函数可以分别基于碳填料和聚合物共混物的连续分布,通过理论Kolarik模型和比例定律求出。因此,本研究提供的理论评估为将来在实际应用领域中的发展奠定了基础。
更新日期:2020-07-08
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