Preparation method of nano Fe3O4 powder for preparation of nano dielectric medium through compounding with polyethylene

A polyethylene and dielectric technology, applied in the field of nano-Fe3O4 powder preparation, can solve the problems of poor compatibility, easy agglomeration, composite preparation of nano-dielectrics, etc., and achieve the effect of improving the heat of LDPE matrix

Inactive Publication Date: 2013-05-22
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0005] The present invention is to solve the current problem caused by Fe 3 o 4 Magnetic nanoparticles have poor compatibility and are easy to agglomerate without surface treatment, and cannot be combined with polyethylene to prepare nano-dielectrics. To provide a nano-Fe that can be combined with polyethylene to prepare nano-dielectrics 3 o 4 Method of powder preparation

Method used

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  • Preparation method of nano Fe3O4 powder for preparation of nano dielectric medium through compounding with polyethylene
  • Preparation method of nano Fe3O4 powder for preparation of nano dielectric medium through compounding with polyethylene
  • Preparation method of nano Fe3O4 powder for preparation of nano dielectric medium through compounding with polyethylene

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specific Embodiment approach 1

[0023] Specific implementation mode 1: In this implementation mode, a nano-Fe that can be combined with polyethylene to prepare nano-dielectrics 3 o 4 The preparation method of powder is specifically prepared according to the following steps:

[0024] 1. Weigh 9~11 parts of FeSO by weight 4 , 10 to 25 parts of FeCl 3 , 1-3 parts of surface modifier and 25-40 parts of saturated ammonia water;

[0025] 2. The FeSO4 taken in step 1 4 Dissolved in distilled water to obtain FeSO 4 solution, FeCl 3 Dissolved in distilled water to obtain FeCl 3 solution, where FeSO 4 FeSO in solution 4 The weight ratio with distilled water is 1:1~3, FeCl 3 FeCl in solution 3 The weight ratio with distilled water is 1:1~3, and then FeSO 4 solution with FeCl 3 The solution is mixed evenly to obtain a mixed solution;

[0026] 3. Under stirring conditions, add the mixed solution obtained in step 2 into the saturated ammonia water weighed in step 1, then heat up to 60°C~80°C, then add the sur...

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment is different from Embodiment 1 in that: in step 1, the surface modifier is nonylphenol polyoxyethylene ether. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the stirring speed in Step 3 is 200r / min~500r / min. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method of nano Fe3O4 powder for preparation of a nano dielectric medium through compounding with polyethylene, relates to a preparation method of nano Fe3O4 powder, and aims to solve the problems that Fe3O4 magnetic nano particles are poor in compatibility and prone to aggregation before surface treatment is performed and can not be prepared into a nano dielectric medium through compounding with polyethylene at present. The method comprises the following steps: 1, weighing; 2, preparing a mixed solution; 3, preparing a nano Fe3O4 preform; and 4, preparing the nano Fe3O4 powder. The invention accurately controls the particle size of the prepared nano Fe3O4 powder and selects an appropriate surface modifier for the surface modification of the nano Fe3O4 powder, so that the surface of the nano Fe3O4 powder is coated with special functional groups having favorable compatibility with polyethylene; and meanwhile, the surface modifier can also achieve the effects of inhibiting the aggregation of the nano Fe3O4 powder and accurately controlling the particle size of the nano Fe3O4 powder. The invention is used for preparing the nano Fe3O4 powder for preparation of a nano dielectric medium through compounding with polyethylene.

Description

technical field [0001] The present invention relates to nanometer Fe 3 o 4 Method of powder preparation. Background technique [0002] Nano-dielectrics, as insulating materials, have gradually replaced traditional insulating materials, which has become an inevitable development trend in the research and development of high-performance insulating dielectrics. Compared with traditional micron-scale composite-based dielectric materials, nanoparticles in nanodielectrics have large specific surface area, high activity, and are easy to form a large interface area with the matrix polymer, resulting in a complex interface structure with strong interaction force. The electrical properties of the dielectric will be improved from different aspects and to varying degrees. At present, most of the nanotechnology is used to modify the electrical, thermal and mechanical properties of polymer-based insulating dielectrics, and some results have been achieved. The application of nano-diele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08B82Y30/00C08L23/06C08K3/22
Inventor 张冬宋伟孙志韩柏何丽娟王暄蒋强张颖雷清泉
Owner HARBIN UNIV OF SCI & TECH
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