An energy-based approach to study the aggregation/agglomeration phenomenon in polymer nanocomposites: Dispersion force against inter-particle cohesion,Polymer Composites

当前位置： X-MOL 学术 › Polym. Compos. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

An energy-based approach to study the aggregation/agglomeration phenomenon in polymer nanocomposites: Dispersion force against inter-particle cohesion
Polymer Composites ( IF 4.8 ) Pub Date : 2022-06-22 , DOI: 10.1002/pc.26804
Esmail Sharifzadeh _{1,

2} , Meysam Maleki ₂

Affiliation

In this study, a novel method was proposed to predict the size and content of the nanoparticle aggregates/agglomerates in polymer nanocomposites based on the characteristics of the mixer, cohesion energy between nanoparticles and their content in the system. The internal energy equilibrium was evaluated by calculating the induced mixing energy by the mixer, aggregation, and agglomeration energies. An analytical model was designed to predict the tensile modulus of the system based on dispersion content and size of the aggregates/agglomerates. In addition, the tensile modulus of the aggregates/agglomerates was defined by developing Wacke's empirical equation. Two sets of PP and PA6 nanocomposite samples, containing 1–3 vol% of silica nanoparticles, were prepared and tested to verify the theoretical results. The applied nanoparticles were subjected to surface modification processes to maximize their compatibility with their surrounding polymer matrix. Different tests, including FE-SEM, contact-angle and tensile, were used to determine the mechanical/physical characteristics of the samples. The predicted results for the size of the aggregated/agglomerated domains were very close to those defined using FE-SEM tests. On the other hand, the predicted tensile moduli based on the content, size and mechanical characteristics of the aggregated/agglomerated domains were acceptably accurate considering the tensile test results.

中文翻译：

一种基于能量的方法来研究聚合物纳米复合材料中的聚集/聚集现象：分散力对抗粒子间的凝聚力

在这项研究中，基于混合器的特性、纳米粒子之间的内聚能及其在系统中的含量，提出了一种预测聚合物纳米复合材料中纳米粒子聚集体/团聚体的尺寸和含量的新方法。通过计算混合器的诱导混合能、聚集能和附聚能来评估内部能量平衡。设计了一个分析模型来预测基于分散含量和聚集体/附聚物大小的系统的拉伸模量。此外，通过开发 Wacke 的经验方程来定义聚集体/附聚物的拉伸模量。制备并测试了两组 PP 和 PA6 纳米复合材料样品，其中含有 1-3 vol% 的二氧化硅纳米粒子，以验证理论结果。应用的纳米粒子经过表面改性处理，以最大限度地提高它们与周围聚合物基质的相容性。不同的测试，包括 FE-SEM、接触角和拉伸，用于确定样品的机械/物理特性。聚集/聚集域大小的预测结果非常接近使用 FE-SEM 测试定义的结果。另一方面，考虑到拉伸试验结果，基于聚集/聚集域的含量、尺寸和机械特性预测的拉伸模量是可以接受的准确。用于确定样品的机械/物理特性。聚集/聚集域大小的预测结果非常接近使用 FE-SEM 测试定义的结果。另一方面，考虑到拉伸试验结果，基于聚集/聚集域的含量、尺寸和机械特性预测的拉伸模量是可以接受的准确。用于确定样品的机械/物理特性。聚集/聚集域大小的预测结果非常接近使用 FE-SEM 测试定义的结果。另一方面，考虑到拉伸试验结果，基于聚集/聚集域的含量、尺寸和机械特性预测的拉伸模量是可以接受的准确。

更新日期：2022-06-22

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11