Biological material with magnetoelectric effect and preparation method thereof
A technology of biomaterials and magnetoelectric effects, applied in the direction of material selection for magnetostrictive devices, material selection for piezoelectric devices or electrostrictive devices, manufacturing/assembly of piezoelectric/electrostrictive devices, etc. , can solve the problem of independent function of electroactive materials and magnetic materials, and achieve the effect of improving piezoelectric performance
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[0029] The biological material with magnetoelectric effect provided by the present invention includes electroactive material with piezoelectric properties and magnetostrictive material with magnetism and scale change under the action of an external magnetic field, wherein the electroactive The material has piezoelectric properties, and the magnetostrictive material is both magnetic and can undergo scale changes under the action of an external magnetic field. The preparation method takes high-voltage electrospinning as an example and includes the following steps:
[0030] (1) preparing a magnetostrictive material suspension;
[0031] (2) dispersing the electroactive material in a solvent to form a dispersion;
[0032] (3) Mix the magnetostrictive material suspension and the electroactive material dispersion, and stir for 2 to 8 hours with non-magnetic force to obtain an electrospinning precursor;
[0033] (4) For the spinning operation of the electrospinning precursor solution...
Embodiment 1
[0036] This embodiment provides an electroactive material polyvinylidene fluoride, magnetostrictive material CoFe 2 o 4 The prepared biological material with magnetoelectric effect, its preparation method comprises the following steps:
[0037] S1. Weigh 36.3793g, 100.9990g and 72.0463g of cobalt nitrate hexahydrate, ferric nitrate nonahydrate and citric acid monohydrate respectively, and dissolve them in 250mL, 500mL and 250mL of distilled water respectively. Prepare 0.5mol / L cobalt nitrate, 0.5mol / L ferric nitrate and 1.5mol / L citric acid aqueous solution;
[0038] S2. Take cobalt nitrate, ferric nitrate and citric acid solution 100mL, 200mL and 120mL respectively, mix, make the mixed aqueous solution of cobalt nitrate, ferric nitrate and citric acid molar ratio 1:2:3.6. At a temperature of 80°C, the mixed solution was magnetically stirred until it was dark red and viscous, and the gel was collected;
[0039] S3. Place the dark red gel in a blast drying oven, and dry it a...
Embodiment
[0074] Example comparison:
[0075] 1. CoFe 2 o 4 Magnetostrictive Strain Properties of Magnetostrictive Materials
[0076] CoFe was measured and described by the new high-tech BKT2600 magnetic characteristic measuring instrument 2 o 4 The magnetostrictive strain curve of the magnetostrictive material, which reflects the magnetostrictive material CoFe 2 o 4 The change curve of the ratio of the elongation of the length to the length λ with the increase of the external magnetic field H. Such as figure 2 As shown, the magnetostrictive strain curve proves that CoFe 2 o 4 Magnetic materials have magnetostrictive properties, and their length will elongate or shorten with the increase or decrease of the external magnetic field.
[0077] 2. Electromechanical coupling performance of magnetoelectric composite materials
[0078] The performance is tested by the linear motor measurement system and the LabView computer data collection system. The results are as follows image 3...
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