Polarographic studies of non-ionic surfactants with reference to their structural influence on surface activity

Biotechnology is one of the fastest growing sector of scientific and applied activities of the humans, which needs to be successfully integrated into existing technologies. Such upcoming trend is the combination of conventional pulp treatment by surfactants and enzymatic processing in order to prevent pitch troubles in the pulp and paper mills. This article presents the research results of the abilities of non-ionic surfactants (sintamid-5, sintanol DS-10), enzyme (lipase) and their syner-gistic combinations to the micelle formation and solubilization. We chose the optimal synergistic compositions and investigated their colloid-chemical characteristics. There is no effect to the micelle formation ability of surfactants when addition of lipase is up to 30%. The largest deviation from the additive values of surface activity was observed for the mixture of individual non-ionic surfactant and lipase at the ratio of 70:30. However, in the all mixtures of both surfactants and lipase the ratio of experimental surface activity to the theoretically calculated is less than one. It looks, that hydrophilic areas of mixed aggregates block hydrophobic areas of lipase thereby preventing adsorption of lipase at the interface. A predominance of the surfactant in the composition will reduce its cost. The maximum of solubilizing capacity has sintanol DS-10 due to its highest HLB and the lowest CMC that leads to more micelles amount in solution and higher total hydrocarbon volume. The pitch solubilization in lipase solutions does not depend on enzyme concentration. The high pitch dissolving in synergistic mixture of sintanol DS-10 and lipase is observed. It is predetermines the usage of such systems for cellulose deresination.For citation:Smith R.A., Demyantseva E.Yu. Andranovich, O.S. Impact of lipase on micelle formation and solubilization abilities of non-ionic surfactants. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 6. P. 54-60

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Tensammetric studies of alcohols with reference to their structural influence on surface activity

Kolloid-Zeitschrift & Zeitschrift für Polymere ◽

10.1007/bf01499821 ◽

1963 ◽

Vol 190 (1) ◽

pp. 40-42 ◽

Cited By ~ 7

Author(s):

S. L. Gupta ◽

S. K. Sharma

Keyword(s):

Surface Activity ◽

Structural Influence

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Effect of biologically active amino acids on the surface activity and micellar properties of industrially important ionic surfactants

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2014.04.003 ◽

2014 ◽

Vol 453 ◽

pp. 78-85 ◽

Cited By ~ 38

Author(s):

Kundan Sharma ◽

Suvarcha Chauhan

Keyword(s):

Amino Acids ◽

Surface Activity ◽

Biologically Active ◽

Ionic Surfactants ◽

Micellar Properties

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Influence of non-ionic surfactants on surface activity of pesticide colloidal systems

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/s0927-7757(00)00584-7 ◽

2001 ◽

Vol 178 (1-3) ◽

pp. 129-133 ◽

Cited By ~ 6

Author(s):

A Piscureanu

Keyword(s):

Surface Activity ◽

Ionic Surfactants ◽

Colloidal Systems

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Effect of Alternation of Chloropropoxy and Propoxy Units and Impact of the Ethylol-Group Number on Properties of Surfactants

Australian Journal of Chemistry ◽

10.1071/ch18213 ◽

2018 ◽

Vol 71 (11) ◽

pp. 837

Author(s):

Gulnara A. Ahmadova ◽

Aygul Z. Abilova ◽

Ravan A. Rahimov ◽

Seadet M. Askerzade ◽

Ziyafaddin H. Asadov ◽

...

Keyword(s):

Surface Activity ◽

Propylene Oxide ◽

Myristic Acid ◽

Cationic Surfactants ◽

Ionic Surfactants ◽

Polar Group ◽

Chemical Parameters ◽

Methyl Group ◽

Group Number ◽

Different Types

Surfactants based on myristic acid, epichlorohydrin, and propylene oxide were obtained in two ways. First, the ester of myristic acid and epichlorohydrin was synthesised, and then with propylene oxide. Second, myristic acid was first reacted with propylene oxide, and then with epichlorohydrin. In both cases, the reactions were carried out at 150–160°C using triethylamine as a catalyst. The obtained chloropropoxy-propoxy and propoxy-chloropropoxy esters of myristic acid are non-ionic surfactants. These products were transformed into cationic surfactants by interaction with several ethanolamines. The specific electroconductance and surface activity of the obtained surfactants, characters that vary with the colloidal–chemical parameters of the surfactants, depended on such factors as the sequence of the epichlorohydrin and propylene oxide units inside the polar group of the obtained ionic surfactants, the presence of the methyl group linked to the N-atom, as well as the number of ethylol groups. It was revealed that the synthesised surfactants possess a property of localising thin (thickness <1 mm) petroleum films spread over different types of water.

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Adsorption of ionic and non-ionic surfactants by wool charring waste

Journal of Chemical Technology & Biotechnology ◽

10.1002/jctb.280310154 ◽

1981 ◽

Vol 31 (1) ◽

pp. 395-400 ◽

Cited By ~ 7

Author(s):

Francis Perineau ◽

Antoine Gaset

Keyword(s):

Ionic Surfactants

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Artemisinin (ART) Drug Delivery Using Mixed Non-ionic Surfactants and Evaluation of Their Efficiency in Different Cancer Cell Lines

International Journal of Drug Delivery Technology ◽

10.25258/ijddt.v4i4.8861 ◽

2017 ◽

Vol 4 (4) ◽

Author(s):

Elnaz Asgharkhani ◽

Aazam Najmafshar ◽

Mohsen Chiani

Keyword(s):

Zeta Potential ◽

Cell Line ◽

Mtt Assay ◽

Therapeutic Index ◽

Stability Study ◽

Polydispersity Index ◽

Ionic Surfactants ◽

Cytotoxicity Test ◽

Molar Ratios ◽

Chemotherapy Agent

This study aims to investigate the effects of different non-ionic surfactants on physicochemical properties of ART niosomes. ART is a natural compound that is used as an antimalarial and chemotherapy agent in medicine. ART has low bioavailability, stability and solubility. In order to solve these problems and enhancing the efficiency of the drug, nanotechnology was used. In the present study, several niosomal formulations of ART prepared using different molar ratios of Span 60 : Tween 60 : PEG-600: ART in PBS. These three formulations were FI (1:1:0.5:0.5), FII (2:1:0.5:0.5) and FIII (1:2:0.5:0.5), respectively. The encapsulation efficiency was measured by HPLC and the drug release was evaluated by dialysis method. The cytotoxicity test was determined by MTT assay. The size, zeta potential and polydispersity index of the vesicles was measured by Zeta Sizer. Stability study was performed within two months. The MTT assay results showed that cytotoxicity effect of these formulations on MCF-7 cell line is better than C6 cell line and the FIII had the best results for both of them. The entrapment efficiencies of the formulations I, II and III were obtained 82.2±1.88%, 75.5±0.92% and 95.5±1.23%, respectively. The results of size, zeta potential and polydispersity index indicated that the size of the vesicles is below 200 nm, their surface charge is about -35 mV and they were monodisperse. Stability and release study indicated that the formulation III has the best stability and release pattern. Therefore, the use of PEGylated niosomal ART can effectively improve its therapeutic index, stability and solubility.

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