A preparation method for improving the use efficiency of anionic gemini surfactants
A technology of surfactants and anions, which is applied in the direction of cationic surface active compounds, surface active detergent compositions, chemical instruments and methods, etc., to achieve the effects of reducing the amount of use, less amount of guest raw materials, and improving use efficiency
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Embodiment 1
[0027] A preparation method of calixyridine-based supramolecular Gemini surfactants, first calixyridine and sul-8 are respectively dissolved in water at room temperature, and then the dissolved sul-8 solution is slowly added dropwise to calixyridine In the solution, after uniform mixing, stand for three and a half hours to obtain the supramolecular Gemini surfactant target solution based on calixyridine, the concentration of calixyridine in the calixyridine-sul-8 supramolecular Gemini surfactant target solution is 0.005 mmol / L, the concentration of sul-8 is 0.010 mmol / L, and the pH value of the target solution is 6.0.
[0028] Characterized by transmission spectra, as figure 1 As shown, when the concentration of sul-8 in the absence of calixyridine is 0.010mmol / L, the light transmittance at 350 nm is almost 100% through the transmission spectrum, which proves that the concentration of sul-8 does not show when it exists alone. Surfactant properties, mixing sul-8 with a conce...
Embodiment 2
[0040] Compared with the Gemini surfactant itself, the supramolecular Gemini surfactant can induce the critical micelle concentration of the anionic Gemini surfactant to decrease by about 1000 times:
[0041] Conductivity method to measure the critical micelle concentration of sul-8 itself:
[0042] Determination of sul-8 self-critical micelle concentration by conductivity method, as Figure 6 As shown, the electrical conductivity increases first and then tends to be flat with the increase of sul-8 concentration, and the inflection point is the critical micelle concentration of sul-8, which is 6.5mmol / L. The pH of the solution was 6.0.
[0043] Conductivity method verification Compared with Gemini surfactant itself, the supramolecular Gemini surfactant can induce the critical micelle concentration of anionic Gemini surfactant to decrease by about 1000 times:
[0044] Measure the critical micelle concentration of anion Gemini surfactant in this supramolecular Gemini surfactan...
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