Effect of Change in Hydrophilic-Lipophilic Balance (HLB) on the State of Stable Invert EMulsion Drilling Fluid

Ezeofor, Chukwuemeka Obiajulu

doi:10.11575/prism/25793

Cited by 1 publication

(1 citation statement)

References 18 publications

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“…However, the BS produced by strain DS03 proved to have excellent properties in forming emulsions. The emulsifying capacity accompanies the HLB value (i.e., hydrophilic-lipophilic balance), which denotes the ability of a surfactant to form oil-in-water (O/W) or water-in-oil (W/O) emulsions [ 44 ]. In this case, the BS ability was successful in forming O/W emulsions.…”

Section: Resultsmentioning

confidence: 99%

Biosurfactant from Bacillus subtilis DS03: Properties and Application in Cleaning Out Place System in a Pilot Sausages Processing

Mendoza

Villavicencio-Vásquez

Aguayo

et al. 2022

Microorganisms

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Biosurfactants (BS) are amphiphilic molecules that align at the interface reducing the surface tension. BS production is developed as an alternative to synthetic surfactants because they are biodegradable, with low toxicity and high specificity. BS are versatile, and this research proposes using a biosurfactant crude extract (BCE) as part of cleaning products. This paper reported the BCE production from Bacillus subtilis DS03 using a medium with molasses. The BCE product was characterized by different physical and chemical tests under a wide pH range, high temperatures, and emulsifying properties showing successful results. The water surface tension of 72 mN/m was reduced to 34 mN/m with BCE, achieving a critical micelle concentration at 24.66 ppm. BCE was also applied to polystyrene surface as pre-treatment to avoid microbial biofilm development, showing inhibition in more than 90% of Escherichia coli, Staphylococcus aureus, and Listeria monocytogenes above 2000 ppm BCE. The test continued using BCE as post-treatment to remove biofilms, reporting a significant reduction of 50.10% Escherichia coli, 55.77% Staphylococcus aureus, and 59.44% Listeria monocytogenes in a concentration higher than 250 ppm BCE. Finally, a comparison experiment was performed between sodium lauryl ether sulfate (SLES) and BCE (included in commercial formulation), reporting an efficient reduction with the mixtures. The results suggested that BCE is a promising ingredient for cleaning formulations with applications in industrial food applications.

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Section: Resultsmentioning

confidence: 99%