scholarly journals Functional Properties of Biopolymer-Based Films Modified with Surfactants: A Brief Review

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1039
Author(s):  
Ahmad Adlie Shamsuri ◽  
Siti Nurul Ain Md. Jamil
Keyword(s):  
Functional Properties ◽  
Guar Gum ◽  
Sodium Dodecyl ◽  
Tween 20 ◽  
Soy Lecithin ◽  
Surface Active Agents ◽  
New Concepts ◽  
Niche Area ◽  
Surface Active ◽  
Amphoteric Surfactants

An increase of environmental awareness recently has increased the interest of researchers in using of biopolymer-based films. The films have been prepared extensively by utilizing starch, carboxymethyl cellulose, chitosan, protein, gelatin, carrageenan, alginate, pectin, guar gum and pullulan. They are typically modified with surface-active agents (surfactants) such as glycerol monostearate, sucrose ester, sodium stearoyl lactate, sodium dodecyl sulfate, ethyl lauroyl arginate HCl, Span 20 to 80, Tween-20 to 80 and soy lecithin for improving the functional properties of the films. In this brief review, two types of biopolymer-based films that prepared through casting method were categorized, specifically solution- and emulsion-based films. The four types of surfactants, namely non-ionic, anionic, cationic and amphoteric surfactants that are regularly used to modify biopolymer-based films are also described. The functional properties of the films modified with different types of surfactants are briefly reviewed. This study enhances the attraction of researchers in biopolymer-based films and the improvement of new concepts in this niche area.

Heat Transfer Enhancement in Separation Process of Ethanol from Ethanol Water Mixture by Using Surfactants

2020 ◽  
pp. 9-14 ◽  
Author(s):  
Acharya Anil Ramchandra ◽  
R. Kadam ◽  
A. T. Pise
Keyword(s):  
Heat Transfer ◽  
Ammonium Chloride ◽  
Sodium Dodecyl ◽  
Water Mixture ◽  
Transfer Enhancement ◽  
Surface Tension Reduction ◽  
Surface Active Agents ◽  
Surface Active ◽  
Time Required

Here the investigations are done while distillation of ethanol-water mixture for separating ethanol from fermentation process. Focus is to study reduction in time required and hence saving in energy for the distillation process of ethanol-water mixture under the influence of surface-active agents (Surfactants). This novelty is from observation of these surfactants to enhance heat transfer rate because of surface tension reduction in aqueous solutions. SDS (Sodium Dodecyl Sulphate), NH4Cl (Ammonium Chloride) and SLBS (Sodium lauryl benzene sulphonate) surfactants in different concentration are experimented. The concentration of these surfactant is varied from 1700 ppm to 2800 ppm. This range is decided by observing critical micelle concentration of used surfactants. Results showed that time is reduced and hence energy consumption is also reduced. Results shown by NH4Cl are found to be more useful as it is ecofriendly surfactant which is not affecting ethanol-water mixture. Use of ammonium chloride as surfactant in distillation is actually useful to reduce energy without hampering the quality of process is the novelty of this work.

Research on Optimal Formula of Dustfall Agent to Remove Blasting Smoke

2012 ◽  
Vol 534 ◽  
pp. 298-303
Author(s):  
Wei Niu ◽  
Zhong An Jiang ◽  
Ju Shi Chen
Keyword(s):  
Surface Active Agent ◽  
Sodium Dodecyl ◽  
Active Agent ◽  
Base Material ◽  
Sodium Dodecyl Benzene Sulfonate ◽  
Base Materials ◽  
Surface Active Agents ◽  
Optimal Surface ◽  
Dodecyl Benzene Sulfonate ◽  
Surface Active

In order to reduce dust produced during the blasting, effective measures according to smoke components and properties are required to be taken. The experiment adopted a number of base materials and surface-active agents to reduce the dust in smoke. Besides, corresponding additives were adopted to reduce poisonous and harmful gases during the blasting. Experiments focused on wettability and surface tension, using contrast experiment to determine optimal base material and surface-active agent, and also studied the influence of additives on their performance. The experimental results suggested that： sodium chloride was the optimal base material, sodium dodecyl benzene sulfonate was the optimal surface-active agent, and copper sulphate and ammonium chloride as additives had almost no influence on performance of surface-active agent and base material. Therefore, adding this dustfall agent to the water bag during the blasting can effectively reduce the concentration of smoke.

Study on Sludge-Sump Oil Viscosity Reduction by Surface-Active Agents Emulsification

2011 ◽  
Vol 396-398 ◽  
pp. 1928-1931
Author(s):  
Qing Qing Yang ◽  
Xin Ma ◽  
Xiao Wei Zhang ◽  
Tian Liang Li ◽  
Yong Jun He ◽  
...  
Keyword(s):  
Orthogonal Experiment ◽  
Sodium Dodecyl ◽  
Active Agent ◽  
Reduction Rate ◽  
Sodium Dodecyl Benzene Sulfonate ◽  
Viscosity Reduction ◽  
Process Conditions ◽  
Oil Viscosity ◽  
Surface Active Agents ◽  
Surface Active

This paper studied the effect of temperature, single surface-active agent and anionic/non-ionic surface-active agents to the viscosity of sludge-sump oil, and ditermined the optimum process conditions by orthogonal experiment. The result showed that the viscosity of sludge-sump iol reduced with the increase of temperature when below 50°C, then the viscosity decreased slowly when the temperature is above 50°C. The optimum conditions obtained by orthogonal experiment were: OP-10 0.6%, sodium dodecyl benzene sulfonate (SDBS) 0.3% and water content 35%. The viscosity reduction rate was about 98.80%.

Effects of surfactants or fat solvent on static pressure-volume hysteresis of excised dog lung

1962 ◽  
Vol 203 (4) ◽  
pp. 725-730 ◽  
Author(s):  
Seiichi Yoshida
Keyword(s):  
Surface Tension ◽  
Static Pressure ◽  
Pressure Level ◽  
Tween 20 ◽  
Trapped Air ◽  
Surface Active Agents ◽  
Surface Active ◽  
Volume Characteristics ◽  
Relationship Of ◽  
Intrabronchial Pressure

The static pressure-volume diagram of the lung was studied after the application of surface active agents to the airways of excised lobes of dog lungs. After rinsing of excised air-free lobes with saline or plasma, hysteresis obtained on air inflation and deflation was marked, but it was remarkably reduced after rinsing air-free lobes with surface active agents, 0.5% Tween-20 in saline, 0.5% octyl alcohol in plasma, or with petroleum ether. The reduced hysteresis was accompanied by a diminution in the amount of air remaining in the lobe on return to zero intrabronchial pressure level. The results of the surface tension-area relationship of lung extracts are consistent with those of the pressure-volume characteristics of lungs. These data indicate that the change in slope and position of the deflation curve resulting from fixing surface tension at about 25 dynes/cm, reduces hysteresis, in correspondence with the reduction of the volume of trapped air at zero intrabronchial pressure level.

scholarly journals Production and Structural Characterization ofLactobacillus helveticusDerived Biosurfactant

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Deepansh Sharma ◽  
Baljeet Singh Saharan ◽  
Nikhil Chauhan ◽  
Anshul Bansal ◽  
Suresh Procha
Keyword(s):  
Structural Characterization ◽  
Biomedical Applications ◽  
Low Cost ◽  
Sodium Dodecyl ◽  
Probiotic Strain ◽  
Fatty Acid Analysis ◽  
Yak Milk ◽  
Surface Active Agents ◽  
Surface Active

A probiotic strain oflactobacilliwas isolated from traditional soft Churpi cheese of Yak milk and found positive for biosurfactant production.Lactobacillireduced the surface tension of phosphate buffer saline (PBS) from 72.0 to 39.5 mNm−1pH 7.2 and its critical micelle concentration (CMC) was found to be 2.5 mg mL−1. Low cost production ofLactobacilliderived biosurfactant was carried out at lab scale fermenter which yields 0.8 mg mL−1biosurfactant. The biosurfactant was found least phytotoxic and cytotoxic as compared to the rhamnolipid and sodium dodecyl sulphate (SDS) at different concentration. Structural attributes of biosurfactant were determined by FTIR, NMR (1H and13C), UPLC-MS, and fatty acid analysis by GCMS which confirmed the presence of glycolipid type of biosurfactant closely similar to xylolipids. Biosurfactant is mainly constituted by lipid and sugar fractions. The present study outcomes provide valuable information on structural characterization of the biosurfactant produced byL. helveticusMRTL91. These findings are encouraging for the application ofLactobacilliderived biosurfactant as nontoxic surface active agents in the emerging field of biomedical applications.

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