UHMWPE/CaSiO3 Nanocomposite: Mechanical and Tribological Properties.

Sakhayana N Danilova,Yuri N Kulchin,Igor Yu Buravlev,Igor Yu Buravlev,Evgeniy P Subbotin,Ivan G Zhevtun,Sofia B Yarusova,Sofia B Yarusova,Yuri N Kulchin,Aitalina A Okhlopkova,Pavel S Gordienko

doi:10.3390/polym13040570

Abstract

This paper studied the effect of additives of 0.5–20 wt.% synthetic CaSiO3 wollastonite on the thermodynamic, mechanical, and tribological characteristics and structure of polymer composite materials (PCM) based on ultra-high-molecular weight polyethylene (UHMWPE). Using thermogravimetric analysis, X-ray fluorescence, scanning electron microscope, and laser light diffraction methods, it was shown that autoclave synthesis in the multicomponent system CaSO4·2H2O–SiO2·nH2O–KOH–H2O allows one to obtain neeindle-shaped nanosized CaSiO3 particles. It was shown that synthetic wollastonite is an effective filler of UHMWPE, which can significantly increase the deformation-strength and tribological characteristics of PCM. The active participation of wollastonite in tribochemical reactions occurring during friction of PCM by infrared spectroscopy was detected: new peaks related to oxygen-containing functional groups (hydroxyl and carbonyl) appeared. The developed UHMWPE/CaSiO3 materials have high wear resistance and can be used as triboengineering materials.

Highlights

The issues of creating, studying, and using polymer composite materials (PCMs) are a promising and rapidly developing field of modern materials science
The aim of this paper was to study the effect of synthetic needle wollastonite obtained hydrothermally in the multicomponent system CaSO4·2H2O–SiO2·nH2O–KOH– H2O on the physical, mechanical, and tribological characteristics and structure of PCM based on ultra-high-molecular weight polyethylene (UHMWPE)
This paper studied the effect of synthetic wollastonite additives with a specific surface area of 26.4 m2/g, obtained by autoclave synthesis at 220 ◦C in a model multicomponent system CaSO4·2H2O–SiO2·nH2O–KOH–H2O system on the physical, mechanical, and tribological characteristics and structure of PCM based on UHMWPE

Summary

Introduction

The issues of creating, studying, and using polymer composite materials (PCMs) are a promising and rapidly developing field of modern materials science. Due to the relatively low cohesive energy of polymers compared to metals and ceramics, PCM are able to effectively transfer/distribute the load across the polymer matrix and filler, which leads to a significant reduction in wear and friction [2,3]. The ability of PCM to dampen shock and vibration loads, along with excellent corrosion resistance, justifies and actualizes their use in the aerospace, chemical, transport, and marine industries. The ability to eliminate the use of lubricants to avoid pollution problems makes PCM parts in demand in application areas such as the textile and food industries. Matrix fillers have an advantage over a mixture of fillers such as fibers, since they do not require alignment and orientation in composites, which significantly affects the wear resistance of PCM and directed loading when slipping [18]

Objectives

Methods

Results

Conclusion