Alkyl Polyglucosides as Components of Water Based Lubricants

Abstract

Water can be used as an ecological lubricant base if it is possible to select additives which can beneficially modify its tribological and corrosion properties. Additionally, those additives should not be harmful to human health and the natural environment. These conditions limit or even eliminate the possibility for the application of the additives used in traditional oil bases as they are insoluble in water and often toxic. Alkyl polyglucosides (APGs) have been suggested as additives improving lubricating properties of water. They are biodegradable and do not have to be recycled. They exhibit surface activity. They produce micelles at low concentration and lyotropic liquid crystals at high concentration. Two types of alkyl polyglucosides differing in alkyl chain lengths and degrees of polymerization were used in this investigation. Tribological tests were carried out using a ball-on-disc T-11 tester. The balls were made of steel, whereas the discs were made of steel, aluminium oxide, zirconium oxide, polyamide and poly(methyl methacrylate). The description of the device and the methods has been given in the literature (Szczerek and Tuszyński in TriboTest 8:273–284, 2002). The addition of APGs improves the lubricating properties of water. The relative decrease in motion resistance and wear depends both on the type of friction couple and on the kind of alkyl polyglucoside used. The tribological test results obtained were correlated with the activity of APGs measured as wettability of friction couples by their solutions.

Formulation Optimization, Rheological Characterization and Suitability Studies of Polyglucoside-based Azadirachta indica A. Juss Emollient Cream as a Dermal Base for Sun Protection Application

“…They act as liquid crystal reservoirs to improve hydration and form elastic networks with water. Hence overall stability of their formulations and long-term maintenance of skin moisture is achieved [20] .…”

Macroscopic Friction Studies of Alkylglucopyranosides as Additives for Water-Based Lubricants

“…The friction coefficient behavior of AGPs was compared to Glucopon 600 CSUP. Sulek et al have studied the tribological property of Glucopon 600 CSUP and the effect of varying friction pairs [48,49]. They showed that it can effectively reduce motion resistance and wear, and a low friction below 0.1 is achieved after reaching the CMC (CMC = 0.05%).…”

“…The low movement resistance and high load-bearing capacity of such systems are the result of the adsorption of a protective layer with ordered structure, which is concluded as an adsorptive-structural mechanism [47]. In addition, they have used biodegradable multi-component solutions based on alkyl polyglycosides (APGs) as a component to reduce friction and wear [48,49]. APGs with a longer alkyl chain length (C12-14) have a high surface affinity and reduce motion resistance and wear more effectively, while APGs C8-C10 have better anti-seizure properties [49].…”

Synthesis and Properties of Alkoxyethyl β‐d‐Xylopyranoside

“…APG with DP from 1 to 5 containing alkyl chains from 6 to 14 carbons are soluble in water, such as C8/C10 polyglucosides, C9-11 polyglucosides, and C12/C14 polyglucosides, they are considered as water solubility; but these molecules with 16-22 carbon atoms are oil-soluble. Their water solubility increases with increasing DP (Sułek, Ogorzałek, Wasilewski, & Klimaszewska, 2013). Of course, cloud point can also be used to evaluate water solubility to some extent (von Rybinski & Hill, 1998).…”