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pH-regulated viscoelastic solutions constructed by anionic/cationic surfactants and their applications

A surfactant and cation technology, applied in the directions of dissolution, chemical/physical processes, chemical instruments and methods, etc., can solve the problems of high cost, high concentration of surfactants, difficult handling, etc., and achieve increased added value and relaxation time. Long, good viscoelastic effect

Active Publication Date: 2019-08-23
广东威斯达新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing problems of adding a large amount of salt, high concentration of surfactant, high cost and difficult follow-up treatment, etc.

Method used

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  • pH-regulated viscoelastic solutions constructed by anionic/cationic surfactants and their applications
  • pH-regulated viscoelastic solutions constructed by anionic/cationic surfactants and their applications
  • pH-regulated viscoelastic solutions constructed by anionic/cationic surfactants and their applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of viscoelastic solution Accurately strive to add 0.0998 g of sodium maleopimarate tetradecimide to the reagent bottle, add 10 mL of prepared 100 mmol·L -1 cetyltrimethylammonium bromide (CTAB) solution. Heat to 70 °C until the solution is clear and transparent, place it in an incubator, and let stand at 25 °C for 48 h. Sodium tetradecimide maleopimarate (16 mmol L -1 ) / CTAB (100 mmol·L -1 ) viscoelastic solution is prepared. According to this method, a series of pH-adjustable viscoelastic solutions constructed by compounding anionic / cationic surfactants are configured, and the appearance is as follows figure 1 shown.

Embodiment 2

[0025] The viscoelastic solution was prepared accurately by adding sodium maleopimarate hexadecimide (0.0775 g), dodecyltrimethylammonium bromide (DTAB) (0.3701 g) and ultrapure water (10 g) into the reagents in the bottle. Heat to 70 °C until the solution is clear and transparent, place it in an incubator, and let stand at 25 °C for 48 h. Sodium hexadecimide maleopimarate (12 mmol L -1 ) / DTAB (120mmol·L -1 ) viscoelastic solution is prepared. A series of pH-adjustable viscoelastic solutions constructed by compounding an anionic / cationic surfactant can also be configured according to this method.

Embodiment 3

[0027] PH control of viscoelastic solution In order to ensure that the added concentrated hydrochloric acid solution has no effect on the volume of viscoelastic solution, 30 mL of viscoelastic solution was PH controlled. Add concentrated hydrochloric acid to the viscoelastic solution prepared by ultrapure water in turn, mix well, test the pH of the viscoelastic solution with a pH meter, until the target pH value is reached, place the adjusted viscoelastic solution in a thermostat at 25 °C Let it stand for 48 h, and observe the macroscopic phase behavior.

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Abstract

The invention discloses a pH control type viscoelastic solution constructed by compounding anion / cation surfactants and its preparation method and application: the viscoelastic solution system is prepared by compounding anion and cation surfactants, wherein the anion surfactant is horse Any one of sodium lepimarate dodecimide, sodium maleopimarate tetradecimide, and sodium maleopimarate hexadecanimide, and the cationic surfactant is dodecyltrimethyl Any one of trimethylammonium bromide (DTAB), tetradecyltrimethylammonium bromide (TTAB), and cetyltrimethylammonium bromide (CTAB). The viscoelasticity of the system can be controlled within the pH range of 1.7~14, which has the characteristics of a gel, and the zero-shear viscosity of the viscoelastic solution can reach 295.2 Pa·s. The invention also discloses the application of the viscoelastic solution in single-layer carbon nanotube (SWNT), and the prepared SWNT dispersion liquid has good uniformity and long stable time.

Description

technical field [0001] The present invention relates to a pH-adjustable viscoelastic solution constructed by compounding anion / cation surfactants and its application, in particular to a pH-adjustable viscoelastic solution constructed from maleopimaric acid-based anionic surfactants and commercial cationic surfactants Applications in dispersed single-walled carbon nanotubes. It belongs to the fields of chemical utilization of rosin and surfactant science. Background technique [0002] Surfactant molecules can form aggregates of various shapes in aqueous solution, such as: spherical, rod-shaped, bilayer, lyotropic liquid crystal, etc. Under suitable conditions, surfactants can form ultra-long and flexible worm micelles with a cross-sectional diameter of nanometers and a length of micrometers. In aqueous solution, the worm micelles are intertwined and overlapped to form a dynamic three-dimensional network, which makes the solution exhibit obvious viscoelasticity. This kind o...

Claims

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Application Information

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IPC IPC(8): B01F17/32B01F17/18C09K23/32C09K23/18
CPCC09K23/017
Inventor 饶小平翟兆兰宋湛谦商士斌
Owner 广东威斯达新材料有限公司
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