Rheological and tribological behavior of polyacrylamide-base solutions for artificial synovial fluid.

IF 0.8 4区医学 Q4 BIOPHYSICS

Acta of bioengineering and biomechanics Pub Date : 2023-01-01

Marcin Klekotka, Monika Izabela Grykin, Jan Ryszard Dąbrowski

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引用次数: 0

Abstract

Purpose: This paper presents tribological and rheological analysis results of artificial synovial fluid base solutions. Special attention was paid to polyacrylamide preparations with different molecular weights and concentrations.

Methods: Tribological tests were conducted using the Al2O3-CoCrMo friction pair in the presence of investigated lubricants. Confocal microscopy was used to analyze and assess of volume, depth, and width of wear traces. Moreover, the viscosity and viscoelasticity tests of analyzed solutions were carried out. The rheological measurements were focused on the oscillatory tests, which allowed us to determine the elasticity modulus (G') and viscosity (G″).

Results: Viscoelastic nature of the tested preparations depends on the strain rate. It has been shown that elastic properties dominate at higher frequencies. The molecular weight of the polymer has a particular influence on these properties. The most promising results were obtained for 6% and 8 % high molecular weight polyacrylamide compositions.

Conclusions: However, all tested polyacrylamide solutions show better rheological and tribological characteristics than commercial preparation based on hyaluronic acid.

本刊更多论文

用于人工滑液的聚丙烯酰胺基溶液的流变学和摩擦学行为。

目的：本文介绍了人工滑液基液的摩擦学和流变学分析结果。特别关注了不同分子量和浓度的聚丙烯酰胺制剂：方法：使用 Al2O3-CoCrMo 摩擦副在所研究的润滑剂存在下进行摩擦学测试。共聚焦显微镜用于分析和评估磨损痕迹的体积、深度和宽度。此外，还对分析溶液进行了粘度和粘弹性测试。流变学测量的重点是振荡试验，通过振荡试验，我们可以确定弹性模量（G'）和粘度（G″）：测试制剂的粘弹性取决于应变速率。结果表明，弹性特性在较高频率下占主导地位。聚合物的分子量对这些特性有特别的影响。结论：6% 和 8% 的高分子量聚丙烯酰胺成分获得了最理想的结果：然而，与基于透明质酸的商用制剂相比，所有测试的聚丙烯酰胺溶液都显示出更好的流变学和摩擦学特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta of bioengineering and biomechanics BIOPHYSICS-ENGINEERING, BIOMEDICAL

CiteScore

2.10

自引率

10.00%

发文量

期刊介绍： Acta of Bioengineering and Biomechanics is a platform allowing presentation of investigations results, exchange of ideas and experiences among researchers with technical and medical background. Papers published in Acta of Bioengineering and Biomechanics may cover a wide range of topics in biomechanics, including, but not limited to: Tissue Biomechanics, Orthopedic Biomechanics, Biomaterials, Sport Biomechanics.