Preparation method of magnetic boron nitride nanosheet/polyurethane composite material having ordered surface microstructure

A technology of composite materials and magnetic nanoparticles, which is applied in the field of preparation of magnetic boron nitride nanosheets/polyurethane composite materials, can solve the problems of polymers and their composite materials with less erosion and wear performance, complex formation mechanism, and many influencing factors , to achieve excellent erosion resistance, low energy consumption and simple process

Inactive Publication Date: 2015-12-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] There are many factors affecting erosion wear, and the formation mechanism is extremely complicated
At present, most of the existing studies are aimed at the erosion wear behavior of metals and their composite materials, and the corresponding erosion wear mechanism models have been established, but there are very few studies on the erosion wear properties of polymers and their composite materials. Still need further exploration and research

Method used

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  • Preparation method of magnetic boron nitride nanosheet/polyurethane composite material having ordered surface microstructure
  • Preparation method of magnetic boron nitride nanosheet/polyurethane composite material having ordered surface microstructure

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specific Embodiment approach 1

[0016] Embodiment 1: The preparation method of a magnetic boron nitride nanosheet / polyurethane composite material with an ordered surface microstructure in this embodiment is carried out according to the following steps:

[0017] 1. Add 2~6g of hexagonal boron nitride powder into 100mL~500mL of mixed acid, stir continuously for 10h~50h at a temperature of 30°C~100°C and a speed of 1000rpm~2000rpm, then cool and dilute with deionized water , repeated suction filtration and washing until the filtrate was neutral to obtain intercalated boron nitride; 2 SO 4 and concentrated HNO with a mass concentration of 95% 3 Composition by volume ratio of 1 to 3:1;

[0018] 2. Disperse the intercalated boron nitride obtained in step 1 in isopropanol, ultrasonically treat it for 10h~30h at room temperature, then centrifuge at 1500rpm~6000rpm for 15min~50min, take the supernatant, and use deionized Washing with water until neutral, drying the product at 80°C to 100°C to obtain boron nitride ...

specific Embodiment approach 2

[0023] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the temperature is 60° C. and the rotation speed is 2000 rpm, and the stirring is continued for 30 hours. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the mixed acid described in step one is made of concentrated H with a mass concentration of 98%. 2 SO 4 and concentrated HNO with a mass concentration of 95% 3 Composition by volume ratio of 3:1. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of a magnetic boron nitride nanosheet/polyurethane composite material, in particular to a preparation method of magnetic boron nitride nanosheet/polyurethane composite material having an ordered surface microstructure. The invention aims to provide the preparation method of the magnetic boron nitride nanosheet/polyurethane composite material having the ordered surface microstructure. The preparation method includes: 1, preparing intercalation boron nitride; 2, preparing boron nitride nanosheets; 3, preparing boron nitride nanosheets, to the surface of each which ferroferric oxide magnetic nanoparticles are carried; and 4, preparing the magnetic boron nitride nanosheet/polyurethane composite material having the ordered surface microstructure. The ordered composite material has excellent erosion wear resistance; compared with disorder boron nitride/polyurethane composite materials and pure polyurethane, the magnetic boron nitride nanosheet/polyurethane composite material has erosion wear resistance increased by 31.9% and 51.5%, respectively and is applicable to anti-erosion protective coatings. The magnetic boron nitride nanosheet/polyurethane composite material is applicable to processing and application of nanomaterials.

Description

technical field [0001] The invention relates to a preparation method of a magnetic boron nitride nanosheet / polyurethane composite material. Background technique [0002] The wear caused by liquid or gas medium carrying tiny solid particles impacting the surface of the material at a certain speed is called erosion wear. Mineral processing components, flow components, main vulnerable parts of ships, slag discharge pipes, turbine blades, etc. are all facing serious erosion damage. According to relevant data statistics, the loss caused by erosion damage in my country is as high as 40 billion yuan every year. Therefore, it is urgent to promote and apply the knowledge of erosion and wear in an all-round way. [0003] With the process of industrialization, polymers and their composite materials gradually show their advantages, such as excellent corrosion resistance, high chemical stability, shock absorption and sound absorption, low friction coefficient, water lubrication without ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08K9/02C08K9/12C08K7/00C08K3/22C08K3/38C08G18/76C08G18/66C08G18/42C08G18/32
Inventor 矫维成袁凤王荣国刘文博杨帆郝立峰徐忠海赫晓东
Owner HARBIN INST OF TECH
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