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Modified iron red, and preparation method and applications thereof

A modification technology of iron red, which is applied in fibrous fillers, coatings, and dyed low-molecular organic compound treatment, etc. It can solve the problems of poor hydrophobicity and limit the development of iron red.

Inactive Publication Date: 2019-06-18
JILIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, iron oxide red converted from pyrite slag waste or commercially available iron oxide red has poor hydrophobicity, which limits the further development of iron red in coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The invention provides a kind of preparation method of modified iron red, comprises the following steps:

[0021] (1) iron red, anionic surfactant and water are mixed to obtain a mixed solution;

[0022] (2) The mixed solution obtained in the step (1) is heated at constant temperature, suction filtered and dried successively to obtain the modified iron red.

[0023] The invention mixes iron red, anion surfactant and water to obtain mixed solution.

[0024] In the present invention, the amount of the anionic surfactant is preferably 10-30% of the mass of iron red, more preferably 15-25%. In the present invention, the anionic surfactant preferably includes sodium dodecylsulfonate or sodium fatty alcohol acyl sulfate; more preferably sodium dodecylsulfonate. In the present invention, the amount of the anionic surfactant is too small, which is not conducive to the full reaction of the iron red and the anionic surfactant; if the amount is too large, the anionic surfactant ...

Embodiment 1

[0036] 5.00g iron red, 0.50g sodium dodecylsulfonate (mass fraction ratio is 10%) are mixed with 100mL water to form a mixed solution; in a constant temperature magnetic heating stirrer at 60°C, carry out constant temperature heating and stirring (stirring speed is 600r / s), the constant temperature time is 60min, after the reaction is completed, the modified iron red is obtained by suction filtration and drying; the contact angle of the modified iron red reaches 96.80°±0.890° through repeated tests.

[0037] The particle size of the obtained modified iron red is measured to be 150-200nm, which shows that the modified iron red particles have overcome agglomeration and have excellent dispersibility.

Embodiment 2

[0039] 5.00g iron red, 1.50g sodium dodecylsulfonate (mass fraction ratio is 30%) and 100mL water are mixed to form a mixed solution; in a constant temperature magnetic heating stirrer at 60°C, carry out constant temperature heating and stirring (stirring speed is 600r / s), and the constant temperature time is 60min. After the reaction, suction filtration and drying are carried out to obtain modified iron red. The contact angle of modified iron red reaches 78.60°±2.320° through repeated tests.

[0040] The particle diameter of the obtained modified iron red is measured to be 150-200 nm.

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Abstract

The invention provides modified iron red, and a preparation method and applications thereof, and belongs to the technical field of inorganic pigment preparation. The preparation method comprises following steps: iron red, an anionic surfactant, and water are mixed, and an obtained mixture is subjected to constant temperature heating, pumping filtration, and drying so as to obtain a finished product. According to the preparation method, the anionic surfactant is absorbed by the surface of micro fine particular iron red, so that a problem in the prior art that agglomeration is caused because oftoo large surface energy and relatively high magnetic performance; the surface of Fe-based oxides in iron red is charged with excess positive charges, so that after adding of the anionic surfactant, chemical absorption is realized; combination of the polar parts of the anionic surfactant with ferrite in iron red is capable of realizing outward arrangement of the nonpolar parts, high molecular filmis formed, iron red surface energy is reduced, and magnetic ion agglomeration is prevented. It is shown by data that the contact angle of the modified iron red is 76 to 98 DEG, excellent hydrophobicperformance is achieved, and the modified iron red can be widely used in the field of paint.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic pigments, in particular to a modified iron red and its preparation method and application. Background technique [0002] Iron oxide red is based on Fe 2 o 3 Red iron oxide as the main component has the advantages of light resistance, high hiding power, non-toxicity, no bleeding, low cost, and can form various tones. It is a pollution-free pigment. In the paint industry, it can be used as a coloring agent and filler for rubber, marble, ground terrazzo, plastic, asbestos leather polishing paste, etc.; in precision instruments and optical glass, it can be used as a polishing agent and a raw material for manufacturing ferrite components of magnetic materials Wait. [0003] Pyrite slag is the solid waste produced by roasting pyrite in the production of sulfuric acid. The comprehensive utilization of pyrite slag has been extensively studied at home and abroad. The analysis results sh...

Claims

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Application Information

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IPC IPC(8): C09C1/24C09C3/08C09D7/62
Inventor 郭玉鹏姜雪李向宏付瑶吴琴杨枝晨王宇
Owner JILIN UNIV
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