Papers by Keyword: SDBS

Abstract: This work presents a study on the effect of Minimum Quantity Lubricant of Al203 nanoparticle with Sodium Dodecylbenzene Sulfonate, SDBS on surface roughness during turning of Mild Steel under constant machining parameters. Surfactant, SDBS in the nanolubricant creates stability of the particles in the base fluid. The experiments were conducted under dry, MQL with pure nanolubricant, and MQL with nanolubricant and additional SDBS. The experimental results showed that MQL nanolubricant with additional SDBS improves the surface roughness compared to dry cutting.

Abstract: It is showed that in the buffer solution of Tris-HCl (pH=8.50), the presence of SDBS could enhance the fluorescence of AAT, and the enhanced level is linear with the concentration of amaranth in a certain range. The detection limit of amaranth is 3.27×10^-7mol·mL^-1.The linear range of amaranth is 1.00×10^-7- 1.00×10^-3mol·L^-1 with R =0.9920. At the same time, its mechanism is discussed by resonance light scattering and absorption spectra. Compared with other analysis methods for amaranth which have been reported, this method has a relatively wider linear range and higher sensitivity.

Abstract: It is found that the fluorescence of curcumin is greatly enhanced by La³⁺ in the prescence of sodium dodecyl benzene sulfonate (SDBS). Based on this, a sensitive fluorimetric method for the determination of curcumin in aqueous solution is proposed. In the HOAc-NaOAc buffer, the fluorescence intensity of curcumin is proportional to the concentration of curcumin in the range of 0.0074-7.4μg·mL^-1 and the detection limit is 3.66ng·mL^-1. The actual samples are satisfactorily determined.

Abstract: The effect of an divalent electrolyte Ca²⁺ on the flocculation of two different concentrations of anionic surfactant Sodium Dodecylbenzenesulfonate (SDBS) with Al³⁺ has been investigated at different molar ratios Al³⁺ to SDBS at 298.15 K. The results showed that the flocculation characteristics of 0.01 mol•L-1 SDBS (above the critical micelle concentration CMC) and 0.001 mol•L-1 SDBS (below the CMC) were obviously different with an increase of dosages of Al³⁺. The z-average size of flocculate of 0.01 mol•L-1 SDBS with Al3+ decreased particularly with the pre-addition of Ca²⁺，It suggested the formation of the complexion Ca(SDBS)2. At optimization flocculation areas at 298.15K, pH values were all around 3.5 in the flocculation systems SDBS/Al³⁺ and Ca²⁺/SDBS/Al³⁺ whether the SDBS concentration above or below the CMC. The pre-addition of Ca²⁺ slightly affected other flocculation parameters of SDBS/Al3+ systems such as zeta potential, surface tension, conductivity and pH.

Abstract: Surface tension is one of the main physical parameters of foams. The surface tension of Sodium Dodecyl Benzene Sulfonate （SDBS）solution and Triton solution are measured by the drop volume method，and at the same time CO2 saturated SDBS solution is also measured in this paper. It is found the solution concentration has an obvious effect on the surface tension. For SDBS solution, the surface tension gradually decreases with the increase of surfactant concentration while keeps constant after a certain concentration. For Triton solution, on the other hand, the surface tension always remains approximately constant in the studied concentration region. The surface tension of CO2 saturated SDBS solution is slightly higher than SDBS solution through experimental investigations.

Abstract: This study investigated the flotation in sodium dodecyl benzene sulfonate system, the effects of phytic acid on talc flotation mechanism, then proposed a new flowsheet to handle this kind talc ore, namely “one roughing-three cleaning-one scavenging’’. The closed-circle flotation test in laboratory can obtain a concentrate with the SiO2 and CaO grade of the concentrate is 61.87% and 0.60%, the SiO2 recovery is 72.59%, removal rate of tremolitei is 95.85%. This paper improved the economic value of the talc containing asbestos, laid the foundation of industrial applications.

Abstract: A novel surfactant, hydroxypropyl cellulose (HPC), was firstly used to debundle Meijo single walled carbon nanotubes (SWNTs) in distilled water and 1-propanol. As comparison, common surfactants (SDBS and Triton) were used to disperse Meijo SWNTs in 1-propanol and distilled water. And the dispersibility of mixed surfactants, HPC/SDBS and HPC/Triton, were also tested. After short ultrasonication and centrifugation, stable supernatant of HPC-SWNTs has been obtained, and HPC show the best dispersibility to Meijo SWNTs. The HPC-SWNTs solution was used to prepare transparent conductive films on PET substrate by spray coating method. After being soaked in 1-propanol and HNO₃, the sheet resistance decreased from 8,440 Ω/□ to 4,175Ω/□ at 90% transmittance. TEM, UV-Vis-NIR spectra, and Raman spectra were performed to characterize the SWNT solutions and films.

Abstract: In this paper, by measurement of zeta potential and particle size the surface modification of Cu nanoparticles in water was investigated at different pH values and different concentration of sodium dodecylbenzenesulfonate (SDBS) dispersant. The results show that the absolute value of zeta potential has very corresponding relation with particle size, and that the higher the absolute value of zeta potential and the smaller of the particle size are, the better dispersion and stability of copper nano-suspensions system is. It is also found that SDBS can significantly affect the value of zeta potential and particle size by electrostatic repulsions, which lead to the enhancement of the stability of the Cu suspensions, and the optimizing concentration for SDBS in 0.1% copper nano-suspensions is 0.07%, which have the best disperse results.