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Membrane technology based preparation method of magnetic non-destructive testing material

A technology of non-destructive testing and membrane technology, applied in the direction of magnetic materials, nanotechnology for materials and surface science, magnetic objects, etc., can solve the problems of uneven distribution, low particle purity, high cost, etc., to prevent mutual aggregation, The particle size distribution is uniform and the effect of reducing the specific surface energy

Inactive Publication Date: 2016-09-21
GUANGDONG INSPECTION & RES INST OF SPECIAL EQUIP ZHUHAI INSPECTION INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nano-Fe produced by these methods 3 o 4 The particle purity is not high, the particle size is large and unevenly distributed, the cost is high, etc., and continuous preparation cannot be realized

Method used

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Examples

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Effect test

Embodiment 1

[0019] The present invention provides a method for preparing a magnetic non-destructive testing material based on film technology, comprising the following steps:

[0020] A: Preparation of reaction raw materials

[0021] a1: Fe 3+ , Fe 2+ Configuration of the mixed solution

[0022] Dissolve ferric chloride and ferrous chloride in demineralized water to prepare mixed solution S1, wherein Fe 3+ with Fe 2+ The ratio of the amount of substances is 2:1.5;

[0023] a2: Configuration of the mixed solution of sodium hydroxide and dispersant

[0024] Sodium hydroxide and dispersant are dissolved in demineralized water to prepare mixed solution S2, wherein the ratio of the amount of sodium hydroxide to dispersant is 1:0.006;

[0025] B: adding distilled water or desalinated water to the reaction vessel, under the action of the pump, the mixed solution S1 and the mixed solution S2 are respectively passed through the PVDF membrane, mixed and reacted in the reactor to generate the ...

Embodiment 2

[0032] The present invention provides a method for preparing a magnetic non-destructive testing material based on film technology. Compared with Example 1, the difference is:

[0033] Dissolve ferric chloride and ferrous chloride in demineralized water to prepare mixed solution S1, wherein Fe 3+ with Fe 2+ The ratio of the amount of substances is 1:1;

[0034] Sodium hydroxide and dispersant are dissolved in demineralized water to prepare mixed solution S2, wherein the ratio of sodium hydroxide to dispersant is 1:0.002.

Embodiment 3

[0036] The present invention provides a method for preparing a magnetic non-destructive testing material based on film technology. Compared with Example 1, the difference is:

[0037] Dissolve ferric chloride and ferrous chloride in demineralized water to prepare mixed solution S1, wherein Fe 3+ with Fe 2+ The ratio of the amount of substances is 3:2;

[0038] The sodium hydroxide and the dispersant are dissolved in demineralized water to prepare a mixed solution S2, wherein the ratio of the amount of sodium hydroxide to the dispersant is 1:0.01.

[0039] By adopting the preparation method of the magnetic non-destructive testing material based on the membrane technology provided by the present invention, the particles generated after the reaction have high purity and uniform particle size distribution, and sodium dodecylbenzenesulfonate is used as a dispersant to prepare sodium hydroxide and As the precipitant of the reaction, the experiment shows that adding surfactant at t...

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Abstract

The invention provides a membrane technology based preparation method of a magnetic non-destructive testing material. The preparation method comprises following steps: A, a1: ferric chloride and ferrous chloride are dissolved into a mixed solution S1 prepared from demineralized water, wherein an amount ratio of Fe<3+> to Fe<2+> is 1:1-3:2; a2, sodium hydroxide and a dispersing agent are dissolved into a mixed solution S2 prepared from the demineralized water, and an amount ratio of sodium hydroxide to the dispersing agent is 1:0.002-1:0.01; B, the mixed solution S1 and the mixed solution S2 are enabled to penetrate through a PVDF (polyvinylidene fluoride) membrane under the action of a pump, mixed in a reactor and subjected to a reaction, and a crude product of the magnetic non-destructive testing nanomaterial is produced; C, the produced crude product is subjected to water bath crystallization and magnetic separation and repeatedly washed with deionized water until the pH value of eluate is 7, ultrasonic oscillation is performed, and after drying, the magnetic non-destructive testing nanomaterial is obtained.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a nano-Fe 3 O 4 The preparation method of the magnetic nondestructive testing material. Background technique [0002] Non-destructive testing is to use the sound, light, magnetic and electrical properties of substances to detect whether there are defects or inhomogeneity in the inspected object without damaging or affecting the performance of the inspected object, and to give the size and location of the defect. , nature and quantity etc. Superparamagnetism is a special magnetic effect. Substances with superparamagnetism are magnetized when an external magnetic field is applied. When the applied magnetic field disappears, the magnetization of superparamagnetic substances is almost zero, and the coercivity is very small. Due to this characteristic, superparamagnetic materials are used in many fields. Among them, magnetic particle testing has become one of the i...

Claims

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Application Information

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IPC IPC(8): C01G49/08H01F1/00H01F41/00G01N27/84B82Y30/00
CPCC01G49/08B82Y30/00G01N27/84H01F1/00
Inventor 戚政武王磊陈英红杨宁祥关晓辉矫庆泽
Owner GUANGDONG INSPECTION & RES INST OF SPECIAL EQUIP ZHUHAI INSPECTION INST
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