The spreading of a surfactant solution on a water film at first glance seems a trivial problem. However, in the last 30 years or so this has been shown to be anything like the case. There have been numerous studies which show that Marongoni driven fingering of the spreading surfactant front exists. In this paper this work has been reviewed and an attempt has been made to rationalise the results. The paper concludes with some recent observations of ours concerning the spreading of sodium dodecyl sulfate over relatively thick water films, 200 microm or less.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s0001-8686(03)00111-8 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Biosurfactants: A review of different strategies for economical production, their applications and recent advancements.
Adv Colloid Interface Sci
January 2025
Department of Biotechnology, School of Applied Sciences and Technology, BLDE (Deemed to be University), Bangaramma Sajjan Campus, Vijayapura 586103, India; Department of Basic Sciences, Faculty of Engineering and Technology, CMR University, Bangalore 562149, India. Electronic address:
Biosurfactants are biodegradable, non-toxic, and environmentally beneficial substances that are produced by microorganisms. Due to their chemical characteristics and stability in various environmental circumstances, biosurfactants are low-molecular-weight, surface-active molecules of great industrial importance. The choice of the producer microbe, kind of substrate, and purification technique determine the chemistry of a biosurfactant and its production cost.
View Article and Find Full Text PDF[Surgery of premature infants-Perspectives and limitations].
Chirurgie (Heidelb)
December 2024
Erasmus MC, University Medical Center Rotterdam, Rotterdam, Niederlande.
The continuous improvement in the quality of modern perinatology, sociodemographic changes and the increasing spread of reproductive medicine have resulted in an increasing number of premature infants to be treated. The treatment of preterm infants (< 37th week of pregnancy) and especially extremely premature infants (< 28th week of pregnancy) is challenging due to immature organ development, which differs considerably from that of other age groups. While the fate of premature infants and especially extremely premature infants was unfavorable 100 years ago, the survival of premature infants > 1000 g has now shifted to survival in over 80% of cases [30].
View Article and Find Full Text PDFSurfactant-Enhanced Spreading on Solids: Roles of the Surface Tension Gradient, Spreading Contact Angle, and Viscosity.
Langmuir
December 2024
Department of Chemical and Biological Engineering, Illinois Institute of Technology, Chicago, Illinois 60616, United States.
Despite its important technological applications, surfactant-enhanced (spontaneous) spreading on a solid surface and how to optimize it on surfaces with different wettabilities are not well understood. Spontaneous spreading involves a surface tension gradient (Marangoni stresses), which enhances spreading over a large area. Experimental observations reveal that the spreading rate and surfactant concentration have an optimum substrate wettability of 60 ± 5° (Hill, R.
View Article and Find Full Text PDFUnveiling surfactant protein-A dynamics in human fetal lung development: histological and immunohistochemical insights from Myanmar.
Folia Morphol (Warsz)
December 2024
School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China.
Background: Surfactant protein-A (SP-A) is the most prevalent protein in the pulmonary surfactant system and it is expressed in Type II alveolar epithelial cells.
Materials And Methods: We evaluated SP-A expression in 92 fetal human lungs at various gestational ages in Myanmar (Burma) using hematoxylin and eosin staining and immunohistochemical assays.
Results: We detected tubular structures in the fetal lungs during the canalicular stage of development at gestational weeks 22-25.
Mechanism and strategy of self-assembly of quaternary ammonium surfactant molecules to regulate pesticide droplet impact and wetting of hydrophobic surfaces.
Pest Manag Sci
December 2024
Shanxi Key Laboratory of Integrated Management of Agricultural Pests, College of Plant Protection, Shanxi Agricultural University, Taiyuan, China.
Background: Surfactants regulate the interaction between pesticide droplets and the surfaces of plants on which they are sprayed. The influence of the key structural functional groups of surfactants on the interaction between pesticide droplets and hydrophobic pear leaves has not been explored. The behavior of Imidacloprid (Imid) droplets regulated by cationic quaternary ammonium surfactants with different structures on hydrophobic pear leaves and their bouncing dynamics were studied.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!