Effect of Surfactant in Gas Dissolved Cleaning Solutions on Acoustic Bubble Dynamics

2021 ◽  
Vol 314 ◽  
pp. 197-201
Author(s):  
So Young Han ◽  
Nagendra Prasad Yerriboina ◽  
Bichitra Nanda Sahoo ◽  
Bong Kyun Kang ◽  
Andreas Klipp ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Anionic Surfactant ◽  
High Speed ◽  
Bubble Dynamics ◽  
Sodium Dodecyl ◽  
High Speed Camera ◽  
Semiconductor Processing ◽  
Megasonic Cleaning ◽  
Bubble Cavitation ◽  
Bubble Characteristics

Megasonic cleaning is one of the promising technologies to remove the particles during semiconductor processing. Acoustic bubble cavitation plays a key role in removing the particles. In this work, the effect of an anionic surfactant sodium dodecyl sulfate (SDS) on a bubble in the presence of hydrogen dissolved DIW water was studied. The bubble dynamics were observed using a high-speed camera. It was found that with the increase of surfactant the bubble characteristics were changed very significantly. Several parameters affecting the bubble dynamics were investigated.

scholarly journals Chitosan/Sodium Dodecyl Sulfate Complexes for Microencapsulation of Vitamin E and Its Release Profile—Understanding the Effect of Anionic Surfactant

2021 ◽  
Vol 15 (1) ◽  
pp. 54
Author(s):  
Jelena Milinković Budinčić ◽  
Lidija Petrović ◽  
Ljiljana Đekić ◽  
Milijana Aleksić ◽  
Jadranka Fraj ◽  
...  
Keyword(s):  
Vitamin E ◽  
Sodium Dodecyl Sulfate ◽  
Anionic Surfactant ◽  
Sodium Dodecyl ◽  
Pharmaceutical Products ◽  
Release Mechanism ◽  
Bioactive Substances ◽  
Water Emulsion ◽  
Dodecyl Sulfate

Microencapsulation of bioactive substances is a common strategy for their protection and release rate control. The use of chitosan (Ch) is particularly promising due to its abundance, biocompatibility, and interaction with anionic surfactants to form complexes of different characteristics with relevance for use in microcapsule wall design. In this study, Ch/sodium dodecyl sulfate (SDS) microcapsules, without and with cross-linking agent (formaldehyde (FA) or glutaraldehyde (GA)), were obtained by the spray drying of vitamin E loaded oil-in-water emulsion. All of the microcapsules had good stability during the drying process. Depending on the composition, their product yield, moisture content, and encapsulation efficiency varied between 11–34%, 1.14–1.62%, and 94–126%, respectively. SEM and FTIR analysis results indicate that SDS as well as cross-linkers significantly affected the microcapsule wall properties. The profiles of in vitro vitamin E release from the investigated microcapsules fit with the Korsmeyer-Peppas model (r2 > 0.9). The chemical structure of the anionic surfactant was found to have a significant effect on the vitamin E release mechanism. Ch/SDS coacervates may build a microcapsule wall without toxic crosslinkers. This enabled the combined diffusion/swelling based release mechanism of the encapsulated lipophilic substance, which can be considered favorable for utilization in food and pharmaceutical products.

scholarly journals Study of Elodea canadensis elimination of Sodium Dodecyl Sulphate and NH4Cl

2021 ◽  
Vol 866 (1) ◽  
pp. 012025
Author(s):  
S E Sergienko ◽  
S S Timofeeva ◽  
A B Kupchinsky ◽  
G Chaneva ◽  
D I Stom ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Anionic Surfactant ◽  
Sodium Dodecyl Sulphate ◽  
Sodium Dodecyl ◽  
Ammonium Nitrogen ◽  
Elodea Canadensis ◽  
Initial Value ◽  
Dodecyl Sulfate ◽  
Negative Effect ◽  
Wet Weight

Abstract The absorption of an anionic surfactant - sodium dodecyl sulfate (SDS) by a Elodea canadensis was studied. Macrophyte (20 g/L wet weight) reduced the concentration of this surfactant from 2 mg/L by 90% within 2 days. A negative effect of SDS on the elimination of ammonium nitrogen by E. canadensis was shown with its content from 1·10-4 M. Thus, in the presence of 1·10-4 M SDS, E. canadensis reduced the concentration of ammonium nitrogen by 51% of the initial value in 2 days (in the control - without surfactants - 92% of the pollutant was absorbed).

scholarly journals The Effect of Surfactants on the Diameter and Morphology of Electrospun Ultrafine Nanofiber

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Jian-Yi Zheng ◽  
Ming-Feng Zhuang ◽  
Zhao-Jie Yu ◽  
Gao-Feng Zheng ◽  
Yang Zhao ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Anionic Surfactant ◽  
Surfactant Concentration ◽  
Sodium Dodecyl ◽  
Average Diameter ◽  
Ammonium Bromide ◽  
Electrospun Nanofiber ◽  
Net Charge ◽  
Nanofiber Diameter ◽  
Polymeric Nanofibers

Different surfactants are introduced to study the diameter and morphology transformation characteristics of electrospun nanofiber. Surfactants increase the net charge density and instability motion of charged jet. The instability motion provides a good way to stretch the charged jets into finer ones, by which the beaded structures are also prevented. Ultrafine nanofiber with average diameter less than 65 nm can be fabricated. The nanofiber diameter decreases with the increase of surfactant concentration in polymer solution. The nanofibers with anionic surfactant sodium dodecyl sulfate (SDS) have the smallest diameter. The cationic surfactant hexadecyl trimethyl ammonium bromide (HTAB) plays the best role to prevent the formation of beaded structures in nanofibers, and helps to increase the uniformity of electrospun nanofiber. The effects of surfactants on the nanofiber diameter and morphology have been studied, which would promote the industrial application of ultrafine polymeric nanofibers.

Mixing Behavior of Cationic Hydrotropes with Anionic Surfactant Sodium Dodecyl Sulfate

2011 ◽  
Vol 32 (10) ◽  
pp. 1452-1458 ◽  
Author(s):  
Ziya Ahmad Khan ◽  
Mohammad Kamil ◽  
Othman Sulaiman ◽  
Rokiah Hashim ◽  
M. N. Mohamad Ibrahim ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Anionic Surfactant ◽  
Sodium Dodecyl ◽  
Mixing Behavior ◽  
Dodecyl Sulfate
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