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Updated: Oct 13, 2025

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

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Published on: September 19, 2020

Nanoscale Functional Additives Application in the Low Temperature Greases.

Sergey A Shuvalov¹, Yaroslav V Porfiryev¹, Dmitry S Kolybelsky¹

¹NC Rosneft-MP Nefteprodukt, PJSC, 40 Shosse Entuziastov, 105118 Moscow, Russia.

|November 13, 2021

Summary

This study investigates replacing traditional grease additives with novel nano-functional additives (NFA). These NFAs improve wear and scuffing resistance without environmental drawbacks, offering enhanced lubricant performance.

Keywords:

calcium borate calcium carbonate complex lithium grease halloysite montmorillonite nanoscale particles polymer grease polyurea grease silicon dioxide

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Area of Science:

Materials Science
Tribology
Nanotechnology

Background:

Traditional anti-wear (AW) and extreme pressure (EP) additives in greases can degrade high-temperature performance, anti-corrosion properties, and pose environmental risks.
There is a need for environmentally friendly and effective alternatives to conventional grease additives.

Purpose of the Study:

To investigate the potential of nano-functional additives (NFAs) as replacements for AW and EP additives in greases.
To evaluate the impact of various nanostructured particles on the physicochemical, anti-wear, and anti-scuffing properties of lithium, polyurea, and polymer greases.

Main Methods:

Morphological analysis of nanoparticles: montmorillonite K10, silica, calcium carbonate, calcium borate, halloysite, and molybdenum disulfide/halloysite.
Testing the effects of these nanostructured components on complex lithium, polyurea, and polymer greases.
Investigating the influence of nanoparticle concentration and introduction method (before/after thermo-mechanical dispersion) on grease properties.

Main Results:

Silica and calcium borate maximized anti-wear and anti-scuffing for lithium greases.
Calcium carbonate and a halloysite-based NFA improved anti-scuffing for polyurea lubricants, while silica and halloysite enhanced anti-wear properties.
Optimal NFA selection and addition method are crucial; some additions negatively impacted yield stress and colloidal stability at higher concentrations.

Conclusions:

Nano-functional additives offer a promising alternative to conventional AW and EP additives, enhancing lubricant performance.
The effectiveness of NFAs depends on the specific nanoparticle, grease type, concentration, and method of incorporation.
Further research into optimizing NFA integration is recommended for advanced lubricant formulations.