High-stability environment-friendly carbon nanotube water dispersing liquid and preparation method thereof

A technology of carbon nanotubes and high stability, which is applied in the field of preparation of carbon nanotube dispersion stabilizers, can solve the problems of easy aggregation of carbon nanotubes, low dispersion concentration, environmental pollution, etc., to improve hydrophobicity, increase adsorption, The effect of solving environmental pollution

Active Publication Date: 2018-10-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention mainly solves the problems of easy agglomeration of carbon nanotubes in the existing carbon nanotube dispersion, low dispersion concentration, poor stability and serious environmental pollution, and provides a high-stability environment-friendly aqueous dispersion of carbon nanotubes

Method used

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  • High-stability environment-friendly carbon nanotube water dispersing liquid and preparation method thereof
  • High-stability environment-friendly carbon nanotube water dispersing liquid and preparation method thereof
  • High-stability environment-friendly carbon nanotube water dispersing liquid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In terms of mass fraction, 1 part of multi-walled carbon nanotubes (CNT-E3010, Zhongshan Carnet Plastic Co., Ltd.), 10 parts of sodium lignosulfonate (NF-2, Yanbian Shixian Shuanglu Industrial Co., Ltd., ≤12%, inorganic salt content ≤3.0% (Na 2 SO 4 )), 0.2 parts of deionized water, and grind for 3 hours by manual grinding. After grinding, add 400 parts of deionized water to dilute, use 0.1M dilute hydrochloric acid or 0.1M dilute NaOH solution to adjust the pH to 7, add 5 parts of dodecane Sodium phenyl sulfonate was ultrasonically dispersed for 0.5 h to obtain a stable dispersion of carbon nanotubes in water.

[0041] figure 1 It is a high-magnification scanning electron microscope picture of the highly stable and environmentally friendly carbon nanotube aqueous dispersion obtained in Example 1 using a scanning electron microscope (FE-SEM, SU-8200, Japan). It can be seen from the figure that the carbon nanotubes are uniformly dispersed and are in a single-layer fla...

Embodiment 2

[0046] In terms of mass fraction, 1 part of multi-walled carbon nanotubes (CNT-E3010, Zhongshan Carnet Plastic Co., Ltd.), 7 parts of calcium lignosulfonate (M-9, Yanbian Shixian Shuanglu Industrial Co., Ltd., ≤12%, calcium and magnesium particle content ≤1.5%), mix with 0.4 parts of deionized water, use a ball mill to grind for 3 hours, add 500 parts of deionized water to dilute after grinding, adjust the pH to 8, add 5 parts of sodium lauryl sulfate Ultrasonic dispersion was carried out for 1 h to obtain a stable dispersion of carbon nanotubes in water.

[0047] The obtained aqueous dispersion of carbon nanotubes had an apparent color of dark black and a concentration of 2.0 g / L. After measurement, the Zeta potential of the aqueous dispersion was -54.2mV, the hydrated particle size was 600.2nm, and no precipitation was found by centrifugation at 5000r / min for 15min. It is proved that the aqueous dispersion of carbon nanotubes has good stability.

[0048] Compounded with 24...

Embodiment 3

[0050] In terms of mass fraction, 2 parts of single-walled carbon nanotubes (TNST, Zhongke Times Nano), 10 parts of sodium lignosulfonate (NF-2, Yanbian Shixian Shuanglu Industrial Co., Ltd., reducing content ≤ 12%, inorganic Salt content ≤ 3.0% (Na2SO4)), mixed with 0.6 parts of deionized water, using a ball mill to grind for 2 hours, after grinding, add 500 parts of deionized water to dilute, adjust the pH to 7, add 10 parts of dodecyl hydroxy sultaine Ultrasonic dispersion was carried out for 1 h to obtain a stable dispersion of carbon nanotubes in water.

[0051] The obtained aqueous dispersion of carbon nanotubes had an apparent color of dark black and a concentration of 4.0 g / L. After measurement, the Zeta potential of the aqueous dispersion was -59.2mV, and the hydrated particle size was 590.8nm. No precipitation was found by centrifugation at 5000r / min for 15min. It is proved that the aqueous dispersion of carbon nanotubes has good stability.

[0052] Compounded with...

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Abstract

The invention discloses a high-stability environment-friendly carbon nanotube water dispersing liquid and a preparation method thereof. The method comprises the steps: according to the mass parts, mixing 1-5 parts of carbon nanotubes, 0.5-20 parts of lignosulfonate and 0.1-5 parts of deionized water; and carrying out grinding treatment, adding water to dilute, adjusting the pH to 6-8, adding a stabilizer, and carrying out ultrasonic dispersion to obtain the stably dispersed carbon nanotube water dispersing liquid. The stabilizer is one or more of triton X-100, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, dodecyl sulfobetain and sodium methyl palmitate sulfonate. The high-stability environment-friendly carbon nanotube water dispersing liquid has the advantages of good dispersion effect of carbon nanotubes, high stability, high concentration, short technological process and preparation period, environmental friendliness and good compatibility with water-based resin.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanotube dispersion liquid, in particular to a method for preparing a water phase-based carbon nanotube dispersion stabilizer. Background technique [0002] Carbon nanotubes (CNTs) have excellent mechanical properties (elastic strength 150GPa, Young's modulus 1200GPa), metal conductivity (1104S / cm), thermal conductivity (3000W / m K), electromagnetic wave shielding effect and a length greater than 1000 Diameter ratio is the best choice for preparing reinforced composite materials. [0003] However, the surface of carbon nanotubes is chemically inert, lacks active groups, and has little solubility in water or organic solvents; in addition, carbon nanotubes have the characteristics of large specific surface area and large aspect ratio, so they are very easy to agglomerate and dissolve in solvents. The combination of these factors seriously restricts the application of carbon nanotubes. Therefore, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/174C09D133/00C09D7/61C09D7/65C09D7/63
CPCC01B32/174C08K2201/011C09D7/61C09D7/63C09D7/65C09D7/70C09D133/00C08L97/005C08K3/041C08K5/42C08K5/41
Inventor 张心亚黄浩炜余晓景李文愿杜芷晴黄晓凤
Owner SOUTH CHINA UNIV OF TECH
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