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Cobalt ferrite magnetic nanoparticle filled strain rate sensitive composite material and method

A technology of magnetic nanoparticles and composite materials, which is applied in the preparation of cobalt ferrite magnetic nanoparticles filled strain rate sensitive composite materials, and in the field of cobalt ferrite magnetic nanoparticles filled strain rate sensitive composite materials, which can solve the problem of CFO magnetic nanoparticles Problems such as uneven reunion

Inactive Publication Date: 2021-07-06
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a strain rate sensitive composite material filled with cobalt ferrite magnetic nanoparticles, which solves the problem of agglomeration and inhomogeneity of CFO magnetic nanoparticles at the local position of the strained matrix

Method used

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  • Cobalt ferrite magnetic nanoparticle filled strain rate sensitive composite material and method
  • Cobalt ferrite magnetic nanoparticle filled strain rate sensitive composite material and method
  • Cobalt ferrite magnetic nanoparticle filled strain rate sensitive composite material and method

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preparation example Construction

[0042] The invention provides a method for preparing a strain rate-sensitive composite material filled with cobalt ferrite (CFO) magnetic nanoparticles, which is specifically implemented according to the following steps:

[0043] Step 1. Preparation of CoFe 2 o 4 magnetic nanoparticles

[0044] In step 1, CoFe 2 o 4 Magnetic nanoparticles for CoFe 2 o 4 Nanospheres (SCFO) or CoFe 2 o4 nanorods (RCFO);

[0045] A: Preparation of CoFe 2 o 4 The method of magnetic nanoparticles (SCFO) is as follows:

[0046] Step S1, weighing raw materials according to the following molar mass ratio: FeCl 3 ·6H 2 O: CoCl 2 ·6H 2 O: CH 3 COONa·3H 2 O: polyethylene glycol = 2.5:5:25~30:40~50;

[0047] Step S2, FeCl 3 ·6H 2 O and CoCl 2 ·6H 2 O is mixed with ethylene glycol to obtain a mixed solution A; wherein, 12.5 mmol of FeCl is required for every 100 mL of ethylene glycol 3 ·6H 2 O;

[0048] Step S3, continuously stir the mixed solution A at 50-60°C for 30-60min, and mix ...

Embodiment 1

[0064] A method for preparing a strain rate sensitive composite material filled with cobalt ferrite magnetic nanoparticles, specifically implemented according to the following steps:

[0065] Step 1. Preparation of CoFe 2 o 4 magnetic nanoparticles

[0066] In step 1, CoFe 2 o 4 Magnetic nanoparticles for CoFe 2 o 4 Nanospheres to prepare CoFe 2 o 4 The method of nanospheres is as follows:

[0067] Step S1, weighing raw materials according to the following molar mass ratio: FeCl 3 ·6H 2 O: CoCl 2 ·6H 2 O: CH 3 COONa·3H 2 O: polyethylene glycol = 2.5:5:25:40;

[0068] Step S2, FeCl 3 ·6H 2 O and CoCl 2 ·6H 2 O is mixed with ethylene glycol to obtain a mixed solution A; wherein, 12.5 mmol of FeCl is required for every 100 mL of ethylene glycol 3 ·6H 2 O;

[0069] Step S3, continuously stir the mixed solution A at 50°C for 30min, and mix CH 3 COONa·3H 2 O and polyethylene glycol (PEG-4000) are added in mixed solution A to obtain mixed solution B;

[0070] ...

Embodiment 2

[0078] Step 1. Preparation of CoFe 2 o 4 magnetic nanoparticles

[0079] In step 1, CoFe 2 o 4 Magnetic nanoparticles for CoFe 2 o 4 Nanospheres to prepare CoFe 2 o 4 The method of nanospheres is as follows:

[0080] Step S1, weighing raw materials according to the following molar mass ratio: FeCl 3 ·6H 2 O: CoCl 2 ·6H 2 O: CH 3 COONa·3H 2 O: polyethylene glycol = 2.5:5:26:45;

[0081] Step S2, FeCl 3 ·6H 2 O and CoCl 2 ·6H 2 O is mixed with ethylene glycol to obtain a mixed solution A; wherein, 12.5 mmol of FeCl is required for every 100 mL of ethylene glycol 3 ·6H 2 O;

[0082] Step S3, continuously stir the mixed solution A at 60°C for 30min, and mix CH 3 COONa·3H 2 O and Polyethylene Glycol are added in the mixed solution A to obtain the mixed solution B;

[0083] Step S4, pour the mixed solution B into an autoclave lined with PPL, and heat at 210° C. for 9 hours to obtain a mixed solution C, cool to room temperature, suction filter and wash the prod...

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Abstract

The invention discloses a preparation method of a cobalt ferrite magnetic nanoparticle filled strain rate sensitive composite material. The preparation method is specifically implemented according to the following steps: step 1, preparing CoFe2O4 magnetic nanoparticles; step 2, preparing a strain rate sensitive matrix; and step 3, preparing the cobalt ferrite magnetic nanoparticle filled strain rate sensitive composite material: mixing the polyborosiloxane polymer matrix, the CoFe2O4 magnetic nanoparticles and dibenzoyl peroxide at room temperature, carrying out vacuum vulcanization treatment in a drying oven at 100-120 DEG C, keeping the state for 1-2 hours, and cooling the final product to room temperature to obtain the cobalt ferrite magnetic nanoparticle filled strain rate sensitive composite material. According to the method, the problems of agglomeration and non-uniformity of CoFe2O4 magnetic nanoparticles at the local position of the strain matrix are solved. The invention further discloses the cobalt ferrite magnetic nanoparticle filled strain rate sensitive composite material.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of magnetic nanomaterials, in particular to a strain rate sensitive composite material filled with cobalt ferrite magnetic nanoparticles, and also relates to a preparation method of the strain rate sensitive composite material filled with cobalt ferrite magnetic nanoparticles. Background technique [0002] In recent years, interest in stimuli-responsive polymers has been aroused in the scientific community due to their characteristic of alternative chemical / physical / mechanical properties upon exposure to external stimuli. Most literatures have reported stimuli-sensitive polymers targeting some common stimuli, such as light exposure, pH, temperature, mechanical stress, biomolecules, and electric / magnetic fields. Several emerging applications have emerged based on different types of stimulus-sensitive systems, including sensors, nanogels, controlled and triggered drug delivery systems, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/14C08K3/24C08K7/00C08K7/18C01G51/00
CPCC01G51/00C01P2002/72C01P2004/16C01P2004/32C01P2004/42C08K3/24C08K7/00C08K7/18C08K2201/01C08K2201/011C08L83/14
Inventor 游才印周振基田娜陈瑶李峰
Owner XIAN UNIV OF TECH
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