Effect of water-soluble and water-insoluble long-chain polar additives on micellar solutions of sodium dodecylbenzene sulfonate

1961 ◽  
Vol 38 (11) ◽  
pp. 595-597
Author(s):  
Lloyd I. Osipow ◽  
Foster Dee Snell
Keyword(s):  
Water Soluble ◽  
Sodium Dodecylbenzene Sulfonate ◽  
Micellar Solutions ◽  
Effect Of Water ◽  
Dodecylbenzene Sulfonate ◽  
Long Chain

Sonochemical Degradation of Sodium Dodecylbenzene Sulfonate in Aqueous Solutions

2003 ◽  
Vol 56 (10) ◽  
pp. 1045 ◽  
Author(s):  
Muthupandian Ashokkumar ◽  
Tyson Niblett ◽  
Lyndon Tantiongco ◽  
Franz Grieser
Keyword(s):  
Initial Step ◽  
Degradation Process ◽  
Degradation Pathway ◽  
Water Soluble ◽  
Sodium Dodecylbenzene Sulfonate ◽  
Gaseous Hydrocarbon ◽  
Dodecylbenzene Sulfonate ◽  
Volatile Products ◽  
Degradation Step ◽  
Radical Attack

The sonochemical degradation of sodium dodecylbenzene sulfonate (SDBS) has been studied over a wide concentration range spanning the critical micelle concentration (CMC) of the surfactant. The rate of degradation of SDBS increased linearly with increasing concentration below the CMC of SDBS. Above the CMC, the degradation rate continued to increase but at a much slower rate compared with that below the CMC. It was found that the increasing rate of degradation of SDBS correlated closely with the decrease in the air/water surface tension of the surfactant solutions. The results of this study strongly suggest that the initial step in the degradation process is OH• radical attack onto SDBS molecules adsorbed at the cavitation bubble/solution interface. The sonication of SDBS solutions for extended periods of time (ca. 12 h) led to the generation of gaseous hydrocarbon products, such as methane, ethane, ethylene, and acetylene. It is concluded that further radical attack occurs on the intermediates produced from the initial degradation step. This further degradation pathway is responsible for producing both water-soluble species, and volatile products that are pyrolyzed within the cavitation bubbles.

scholarly journals Effect of water-soluble polymers, polyethylene glycol and poly(vinylpyrrolidone), on the gelation of aqueous micellar solutions of Pluronic copolymer F127

2012 ◽  
Vol 368 (1) ◽  
pp. 336-341 ◽  
Author(s):  
Nágila M.P.S. Ricardo ◽  
Nadja M.P.S. Ricardo ◽  
Flávia de M.L.L. Costa ◽  
Francisco W.A. Bezerra ◽  
Chiraphon Chaibundit ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Water Soluble ◽  
Micellar Solutions ◽  
Water Soluble Polymers ◽  
Soluble Polymers ◽  
Effect Of Water ◽  
Aqueous Micellar Solutions

scholarly journals The effect of water-soluble polymers, PEG and PVP, on the solubilisation of griseofulvin in aqueous micellar solutions of Pluronic F127

2011 ◽  
Vol 421 (2) ◽  
pp. 252-257 ◽  
Author(s):  
Cristiane P. Oliveira ◽  
Maria Elenir N.P. Ribeiro ◽  
Nágila M.P.S. Ricardo ◽  
Ticiane V. de P. Souza ◽  
Carolina Lima Moura ◽  
...  
Keyword(s):  
Water Soluble ◽  
Pluronic F127 ◽  
Micellar Solutions ◽  
Water Soluble Polymers ◽  
Soluble Polymers ◽  
Effect Of Water ◽  
Aqueous Micellar Solutions

scholarly journals Optimizing Chitin Depolymerization by Lysozyme to Long-Chain Oligosaccharides

Marine Drugs ◽  
2021 ◽  
Vol 19 (6) ◽  
pp. 320
Author(s):  
Arnaud Masselin ◽  
Antoine Rousseau ◽  
Stéphanie Pradeau ◽  
Laure Fort ◽  
Rodolphe Gueret ◽  
...  
Keyword(s):  
Time Course ◽  
Water Soluble ◽  
Organic Fertilizers ◽  
Symbiotic Associations ◽  
Egg White Lysozyme ◽  
Hen Egg White ◽  
Ecological Transition ◽  
Optimized Conditions ◽  
Hydrolysis Of ◽  
Long Chain

Chitin oligosaccharides (COs) hold high promise as organic fertilizers in the ongoing agro-ecological transition. Short- and long-chain COs can contribute to the establishment of symbiotic associations between plants and microorganisms, facilitating the uptake of soil nutrients by host plants. Long-chain COs trigger plant innate immunity. A fine investigation of these different signaling pathways requires improving the access to high-purity COs. Here, we used the response surface methodology to optimize the production of COs by enzymatic hydrolysis of water-soluble chitin (WSC) with hen egg-white lysozyme. The influence of WSC concentration, its acetylation degree, and the reaction time course were modelled using a Box–Behnken design. Under optimized conditions, water-soluble COs up to the nonasaccharide were formed in 51% yield and purified to homogeneity. This straightforward approach opens new avenues to determine the complex roles of COs in plants.

scholarly journals Transformation of Construction Cement to a Self-Healing Hybrid Binder

2019 ◽  
Vol 20 (12) ◽  
pp. 2948 ◽  
Author(s):  
Werner E.G. Müller ◽  
Emad Tolba ◽  
Shunfeng Wang ◽  
Qiang Li ◽  
Meik Neufurth ◽  
...  
Keyword(s):  
Soil Bacteria ◽  
Construction Material ◽  
Water Soluble ◽  
The Self ◽  
Average Chain Length ◽  
Self Healing ◽  
Cement Concrete ◽  
Low Concentrations ◽  
Natural Mechanism ◽  
Long Chain

A new biomimetic strategy to im prove the self-healing properties of Portland cement is presented that is based on the application of the biogenic inorganic polymer polyphosphate (polyP), which is used as a cement admixture. The data show that synthetic linear polyp, with an average chain length of 40, as well as natural long-chain polyP isolated from soil bacteria, has the ability to support self-healing of this construction material. Furthermore, polyP, used as a water-soluble Na-salt, is subject to Na+/Ca2+ exchange by the Ca2+ from the cement, resulting in the formation of a water-rich coacervate when added to the cement surface, especially to the surface of bacteria-containing cement/concrete samples. The addition of polyP in low concentrations (<1% on weight basis for the solids) not only accelerated the hardening of cement/concrete but also the healing of microcracks present in the material. The results suggest that long-chain polyP is a promising additive that increases the self-healing capacity of cement by mimicking a bacteria-mediated natural mechanism.

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