Anti-corrosive non-aqueous DBSA/MEA lamellar liquid crystal lubrication system

Wang, Tong; Song, Chao; Pan, Wei; Xu, Zhaoyi; Fan, Lei; Hu, Yimin; Han, Jie; Guo, Rong

doi:10.1016/j.jcis.2023.02.009

Cited by 8 publications

(1 citation statement)

References 45 publications

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“…Solutions formed with amphiphilic molecules form micelles due to their self-assembly properties, and these micelles form ordered mesophases called lyotropic liquid crystals (LLCs) [1][2][3]. The micelles that come together may have packaging geometries to form cubic, lamellar, and hexagonal structures, depending on the interactions between them [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Polymer Additive on the Lyotropic Lamellar Phase Formed by Surfactants with Different Head Groups

Cukurkent,

MASALCI

2024

Preprint

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In this study, the effect of polyvinylpyrrolidone (PVP) polymer on lyotropic lamellar phases obtained using different types of surfactants, anionic and cationic, was compared. Three different methods were used to make these comparisons. The polarized microscope (POM) method was used to observe and compare morphological changes. It was observed that the texture structures of the lyotropic lamellae phases obtained by using anionic and cationic surfactants were different from each other. Structural changes were investigated by the small-angle X-ray scattering (SAXS) method. As the polymer concentration added to the lyotropic lamellae phase(s) increased, it was determined that the structural changes of the anionic and cationic samples were different from each other. The interactions of surfactant-polymer molecules with each other and their packaging were accordingly investigated by Fourier transform infrared spectroscopy (FTIR). How the polymer was added to the lyotropic lamellae phase and how the surfactant interacted with the chain and head groups was determined by examining the frequency shifts of the methylene chains and head groups. These frequency shifts provide information about trans-gauche transformations. Both polymers and lyotropic lamellae phases have wide biological and technological uses. For this reason, their use together, that is, the interactions of polymer doped-lamellar phases, is interesting and should be understood.

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