Conductivity, Surface Tension, and Comparative Antibacterial Efficacy Study of Different Brands of Soaps of Nepal

Chaudhary, Narendra Kumar; Bhattarai, Arush; Guragain, Biswash; Bhattarai, Ajaya

doi:10.1155/2020/6989312

Cited by 16 publications

(6 citation statements)

References 47 publications

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“…Sachin et al [42] also used the same ratio to study the solvent effects. In the same way, the concept of the ratio of the solvent conductance to the conductance at the CMC (κ o /κ CMC ) has been developed by our researchers to observe the efficiency of surfactants [82,83]. Figure 5 shows the curvilinear variation of κ o /κ CMC with volume fraction of methanol.…”

Section: Tensiometric Measurements and Surface Propertiesmentioning

confidence: 91%

Physicochemical Studies on the Interaction between Sodium Dodecyl Sulfate and Methylene Blue in Methanol-Water Mixed Solvent Media

Shah

Jha

Bhattarai

2020

Journal of Chemistry

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The surface activity and the process of micellization of sodium dodecyl sulfate (SDS) with methylene blue (MB) in a methanol-water mixed solvent system were investigated by tensiometry and conductometry at 298.15 K. The measurements of surface tension and conductivity of SDS-MB complex were carried up to 0.3 volume fractions of methanol because the resulting complex appeared turbid above 0.3 volume fractions of methanol. The critical micelle concentration (CMC) of the SDS was determined from both tensiometry and conductometry. The CMC of SDS increased with the increasing volume fraction of methanol due to the inclusion of methanol in the micelles and decreased in the presence of methylene blue due to the reduction of electrostatic repulsion within the anionic moiety of SDS by the positive charge of the added dye. Different properties like surface excess concentration Γ max , minimum surface area A min , Gibbs free energy of micellization Δ G m o , surface pressure ( π CMC ), efficiency of a surfactant ( p C 20 ), packing parameter P , and standard free energy interfacial adsorption Δ G ads o of SDS in the absence/presence of MB were calculated. On the basis of Δ G m o values, it was noticed that the increasing volume fraction of methanol disfavors the micellization of SDS, while the presence of MB increased the efficiency of SDS making the micellization process more spontaneous.

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Section: Tensiometric Measurements and Surface Propertiesmentioning

confidence: 91%

Physicochemical Studies on the Interaction between Sodium Dodecyl Sulfate and Methylene Blue in Methanol-Water Mixed Solvent Media

Shah

Jha

Bhattarai

2020

Journal of Chemistry

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“…Because the CMC of Gemini surfactant is important in determining a surfactant's inhibition efficiency 27 , the CMC value of DMAEB was determined by surface tension measurements, as shown in Fig. 2 .…”

Section: Resultsmentioning

confidence: 99%

Inhibitory influence of cationic Gemini surfactant on the dissolution rate of N80 carbon steel in 15% HCl solution

Deyab

Mohsen

2021

Sci Rep

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Strong acids are commonly used in petroleum wells to remove scale layers from the surface of N80 C-steel pipe. The corrosive effects of these acids, on the other hand, pose a significant risk to C-steel pipes. For the first time, we discovered the anti-corrosion properties of cationic Gemini surfactant, 1,2-bis(dodecyldimethylammonio) ethane dibromide (DMAEB), for N80 C-steel pipe in acid washing solution (15.0% HCl). The DMAEB, in particular, can reduce the corrosion rate of N80 C-steel by approximately 97%. DMAEB molecules work as a mixed-type corrosion inhibitor, according to electrochemical results. The DMAEB demonstrated a high inhibition effect at high temperatures, as well as high activation energy against the corrosion process. DMAEB's significant performance is primarily due to physical adsorption on the N80 C-steel surface, as confirmed by adsorption isotherms, SEM, EDX, FT-IR, and theoretical studies. Our findings shed new light on the use of Gemini surfactants as corrosion inhibitors in petroleum wells.

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“…Soaps contain a mixture of surfactants, emulsifying agents, copolymers, coloring agents, perfumes, etc. [23]. Chemically, soaps are sodium or potassium salts of saturated or unsaturated long-chain fatty acids that function as surfactant (surfaceactive) molecules; the long hydrocarbon chain forms a non-polar hydrophobic tail and the ionic 6 carboxylate group forms a polar hydrophilic head [27] (figure 2).…”

Section: Chemistry and Cleansing Action Of Soapmentioning

confidence: 99%

Fighting the SARS CoV-2 (COVID-19) Pandemic with Soap

Chaudhary¹,

Chaudhary²,

Dahal³

et al. 2020

Preprint

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Today, the entire globe is struggling to deal with the greatest pandemic of the century, COVID-19. With no clinically approved treatments available, we are left with no options other than following the preventive measures issued by the World Health Organization (WHO). Among many others, hand washing with soap and water has been emphasized the most because it is cost-effective and easily accessible to the general public. Various studies have reported that soaps offer unique chemical properties that can disinfect the virus as a whole. However, there is still ambiguity in the general public about whether soaps can really shield us from this highly contagious disease. In an attempt to help eliminate the ambiguity, we analyzed the mechanisms underlying the efficacy of soap and its prospect for preventing the spread of COVID-19. In this paper, we have provided an overview of the history and characteristics of SARS-CoV-2 (COVID-19), the detailed mechanisms of the deactivation of viruses by soaps, and the potential effectiveness of soap in eliminating coronaviruses including SARS-CoV-2.

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Conductivity, Surface Tension, and Comparative Antibacterial Efficacy Study of Different Brands of Soaps of Nepal

Cited by 16 publications

References 47 publications

Physicochemical Studies on the Interaction between Sodium Dodecyl Sulfate and Methylene Blue in Methanol-Water Mixed Solvent Media

Physicochemical Studies on the Interaction between Sodium Dodecyl Sulfate and Methylene Blue in Methanol-Water Mixed Solvent Media

Inhibitory influence of cationic Gemini surfactant on the dissolution rate of N80 carbon steel in 15% HCl solution

Fighting the SARS CoV-2 (COVID-19) Pandemic with Soap

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