Investigating the effect of surface modification on the dispersion process of polymer nanocomposites

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, COMPOSITES

Nanocomposites Pub Date : 2020-08-27 DOI:10.1080/20550324.2020.1809250

A. Prasad, Yixing Wang, Xiaolin Li, Akshay Iyer, Wei Chen, L. Brinson, L. Schadler

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引用次数: 13

Abstract

Abstract Achieving controlled nanoparticle dispersion through melt processing has been challenging as processing-structure rules for polymer nanocomposites are still not well-defined. This work focuses on developing a quantitative understanding of the filler–matrix compatibility and melt mixing parameters on the dispersion of nanoparticles. Filler-matrix compatibility was varied by surface modification of silica nanoparticles. A twin screw extruder was used to prepare the nanocomposites and TEM imaging and image analysis were used to quantitively characterize the microstructure. It was found that matrix–filler compatibility strongly affected the method of agglomerate breakdown and dispersion. Under similar conditions, compatible systems tended to disperse via rupture of agglomerates while incompatible systems were found to disperse via erosion. A map was created to predict the dispersion mechanism as a function of processing conditions and system compatibility and systems from this study and literature were found to be in good agreement with the map. Graphical Abstract

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研究了表面改性对聚合物纳米复合材料分散过程的影响

由于聚合物纳米复合材料的加工结构规律尚未明确，因此通过熔体加工实现可控的纳米颗粒分散一直是一个挑战。这项工作的重点是对填料-基质相容性和熔体混合参数对纳米颗粒分散的定量理解。二氧化硅纳米颗粒的表面改性改变了填料与基质的相容性。采用双螺杆挤出机制备纳米复合材料，利用透射电镜和图像分析对其微观结构进行了定量表征。研究发现，填料与基体的相容性对结块破碎和分散的方式有很大影响。在相似条件下，相容体系倾向于通过团聚体破裂分散，而不相容体系则倾向于通过侵蚀分散。建立了一个图来预测分散机制作为处理条件和系统兼容性的函数，并且从本研究和文献中发现的系统与图很好地一致。图形抽象

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来源期刊

Nanocomposites Multiple-

CiteScore

7.40

自引率

15.20%

发文量

审稿时长

16 weeks