Modeling Nanoparticle Dispersion in Electrospun Nanofibers
Modeling Nanoparticle Dispersion in Electrospun Nanofibers
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DOI：
10.1021/acs.langmuir.7b03726
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发表时间：
2018-01-30
期刊：
影响因子：
3.9
通讯作者：
Mu, Bin
中科院分区：
文献类型：
--
作者：
Balzer, Christopher;Armstrong, Mitchell;Mu, Bin
纳米颗粒在聚合物基体中的分散质量显著影响复合材料的宏观性能。与一般的聚合物-纳米颗粒复合材料一样，静电纺丝纳米颗粒复合材料没有采用定量模型来分散在整个聚合物基质中，通常依赖于定性评估。作为这样一个有影响力的属性，量化分散对于优化过程和理解影响分散的因素至关重要。在这里，开发了一个模拟模型，以量化纳米粒子的体积负载（phi）和纤维与颗粒直径比（D/d）的影响，在静电纺丝分散液的基础上的颗粒间的距离。定义色散因子以量化沿聚合物纤维的色散沿着。在稀释状态（phi < 20%）中，定义了色散因子的三个不同区域，其中当几何约束限制光纤体积可达性时，显示出发生最高质量的色散。该模型通过其与显微镜技术的可比性作为未来实验研究和分散模型的比较标准，并作为一种用单一性能指标量化和预测静电纺丝聚合物-纳米颗粒系统分散的方法。
The quality of nanoparticle dispersion in a polymer matrix significantly influences the macroscopic properties of the composite material. Like general polymer-nanoparticle composites, electrospun nanofiber nanoparticle composites do not have an adopted quantitative model for dispersion throughout the polymer matrix, often relying on a qualitative assessment. Being such an influential property, quantifying dispersion is essential for the process of optimization and understanding the factors influencing dispersion. Here, a simulation model was developed to quantify the effects of nanoparticle volume loading (phi) and fiber-to-particle diameter ratios (D/d) on the dispersion in an electrospun nanofiber based on the interparticle distance. A dispersion factor is defined to quantify the dispersion along the polymer fiber. In the dilute regime (phi < 20%), three distinct regions of the dispersion factor were defined with the highest quality dispersion shown to occur when geometric constraints limit fiber volume accessibility. This model serves as a standard for comparison for future experimental studies and dispersion models through its comparability with microscopy techniques and as a way to quantify and predict dispersion in electrospinning polymer-nanoparticle systems with a single performance metric.