CN107201570B - A diamond/fiber flexible polishing tool with a core-shell structure - Google Patents

Abstract

A kind of diamond of core shell structure/fiber flexibility rubbing down tool, it is a kind of using the fiber that conduction high polymer is constituted as internal cored structure, and the diamond of half embedment is as shell structure with rubbing down tool that is flexible, being bonded with complex-curved formation adaptivity；Mainly solvent dissolution is added in conducting high polymers object by the preparation method of above-mentioned rubbing down tool, is then divided into two parts；A copy of it is added diamond and carries out ultrasonic mixing, preferably using conducting high polymers object solution as cored structure solution, using the mixture of diamond and conducting high polymers object as shell structure solution, carry out electrostatic spinning, after spinning, obtained spinning is put into Muffle furnace, 180 DEG C of heat treatment in 2 hours is carried out.The method of the present invention is simple, can reduce polishing cost, and diamond/fiber flexible can form being bonded for adaptivity with complex-curved, can become the polishing and grinding head of automation rubbing down machine, applied widely.

Description

A diamond/fiber flexible polishing tool with a core-shell structure

technical field

The invention relates to a polishing tool and a preparation method thereof.

Background technique

The polishing process is a process that uses physical and mechanical action to reduce the surface roughness of machine parts, optical components, electronic components, etc., and has important applications in many fields such as aviation, optical manufacturing, electronics industry, and precision manufacturing. Sometimes the quality of the polishing process is directly related to the overall quality and availability of the device. For example, the overall blisk of a high-performance aero-engine has extremely high requirements for polishing. However, traditional polishing tools cannot form a good fit with this three-dimensional surface, and often only use inefficient manual polishing, which limits the development of automatic polishing machines. The development of flexible polishing tools with adaptability to complex surfaces is the key to unlocking technical bottlenecks. In addition, many optical components and electronic components require ultra-smooth surfaces. At present, abrasive tools such as polyurethane and diamond-containing polishing liquid are often used for polishing in engineering. However, this process has a large demand for diamonds and a high cost.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a diamond/fiber flexible polishing tool with a core-shell structure that is simple in method and can reduce polishing costs.

The diamond/fiber flexible polishing tool with a core-shell structure of the present invention is a fiber composed of a conductive high polymer as the inner core structure, and the semi-buried diamond as the shell structure is flexible and can form self-contained with complex curved surfaces. Adaptive fit polishing tool.

The preparation method of above-mentioned polishing tool is as follows:

(1) Raw materials used:

Diamond, solvent and conductive polymer, the mass percentage of solvent and conductive polymer is 10～11.5:1～1.5, and the mass percentage of diamond and conductive polymer is 1:9～19;

The particle size of the diamond is 1 μm to 5 nm; the solvent is one of N,N-dimethylformamide, deionized water or ethanol; the conductive high molecular polymer is polyacrylonitrile, polyvinyl alcohol , one of chitosan, polymethyl methacrylate or polyvinylpyrrolidone;

(2) Preparation of diamond/fiber flexible polishing tool with core-shell structure:

①Add the conductive polymer into the solvent, and keep stirring with a magnetic stirrer to ensure that the conductive polymer is fully dissolved; then divide the solution of the conductive polymer into two parts evenly;

2. Take a portion of the conductive polymer solution prepared in step (1), add diamond into it, and perform ultrasonic mixing, and the ultrasonic frequency is 20KHz to ensure that the diamond is uniformly dispersed in the solution;

③ Using coaxial electrospinning equipment, the conductive high molecular polymer solution prepared in step ① is used as the core structure solution, and the mixture of diamond and conductive high molecular polymer in step ② is used as the shell structure solution, and then electrospinning is performed. The fixed spinning voltage is 18-22kV, and the spinning distance is 5-15cm. After the spinning is completed, the obtained spinning is put into a muffle furnace and subjected to heat treatment at 180 ° C for 2 hours to obtain a diamond/shell structure with a core-shell structure. Fiber flexible polishing tool.

The fiber composed of the conductive polymer is the internal core structure, the flexible matrix of the polishing tool, and the support body with a three-dimensional network structure at the microscopic level; the semi-buried diamond is a shell structure, which plays a role in polishing the device and has The flexible diamond/fiber can form an adaptive fit with complex curved surfaces, which can be used as a polishing head for automatic polishing machines, and can also be used for polishing optical and electronic components.

Compared with the prior art, the present invention has the following advantages:

(1) Using coaxial electrospinning technology, diamond only needs to be added to the shell solution, saving the amount of diamond, and the internal core structure supports the three-dimensional structure and maintains the flexibility of the material.

(2) The flexible diamond/fiber can form an adaptive fit with complex curved surfaces, and can become a polishing head of an automatic polishing machine with a wide range of applications.

(3) The preparation method is simple, and the diamond is fixed in the polishing tool, which reduces the loss and saves the polishing cost.

Description of drawings

1 is a scanning electron microscope image of diamond/fiber in Example 2 of the present invention.

Detailed ways

Example 1

Take 13.5g of polyvinyl alcohol and pour it into 90g of deionized water. During this period, a magnetic stirrer needs to be used for continuous stirring to ensure that the polyvinyl alcohol is fully dissolved; then the polyvinyl alcohol aqueous solution is divided into two parts, one of which is used as coaxial electrostatic For the core solution of spinning, 0.75 g of diamond with a particle size of 1 μm was added to the other part, and the diamond was uniformly dispersed in the solution by ultrasonic wave, and the solution was used as the shell solution. The core and shell solutions were injected into the coaxial electrospinning equipment, the spinning voltage was set to 18 kV, and the spinning distance was 5 cm, and then electrospinning was performed. After spinning, the obtained samples were placed in a muffle furnace. Heat treatment at 180° C. for 2 hours was performed to obtain a diamond/fiber flexible polishing tool with a core-shell structure.

Example 2

Take 7.8g of polyacrylonitrile and pour it into 90g of N,N-dimethylformamide, during which it is necessary to use a magnetic stirrer for continuous stirring to ensure that the polyacrylonitrile is fully dissolved. Then the polyacrylonitrile solution was evenly divided into two parts, one of which was used as the core solution for coaxial electrospinning, and the other was added with 0.205g of diamond with a particle size of 100 nm, and the diamond was uniformly dispersed in the solution by ultrasonic wave. This solution is a shell solution. The core and shell solutions were injected into the coaxial electrospinning equipment, the spinning voltage was set to 20 kV, and the spinning distance was 10 cm, and then electrospinning was performed. After spinning, the obtained samples were put into a muffle furnace, Heat treatment at 180° C. for 2 hours was performed to obtain a diamond/fiber flexible polishing tool with a core-shell structure. The microscopic topography of the diamond/fiber is shown in Figure 1 (electron microscope image), the diamond/fiber forms a three-dimensional network structure, the diameter of the fiber is uniform, and the diamond is embedded in the fiber structure.

Example 3

Take 10g of polyvinylpyrrolidone and pour it into 90g of ethanol, during which it is necessary to use a magnetic stirrer for continuous stirring to ensure that the polyvinylpyrrolidone is fully dissolved. Then the polyvinylpyrrolidone solution was evenly divided into two parts, one of which was used as the core solution for coaxial electrospinning, and the other part was added with 0.5 g of diamond with a particle size of 5 nm, and the diamond was uniformly dispersed in the solution by ultrasonic wave. This solution is a shell solution. The core and shell solutions were injected into the coaxial electrospinning equipment, the spinning voltage was set to 22 kV, and the spinning distance was 15 cm, and then electrospinning was performed. After spinning, the obtained samples were put into a muffle furnace, Heat treatment at 180° C. for 2 hours was performed to obtain a diamond/fiber flexible polishing tool with a core-shell structure.

Claims (2)

1. the preparation method of the diamond/fiber flexible polishing tool of a core-shell structure, the diamond/fiber flexible polishing tool of the core-shell structure is a kind of core structure with the fiber that the conductive high polymer is made of as the inner, half The embedded diamond is a flexible polishing tool with a shell structure that can form an adaptive fit with complex curved surfaces, and is characterized by: (1) Raw materials used: Diamond, solvent and conductive polymer, the mass percentage of solvent and conductive polymer is 10～11.5:1～1.5, and the mass percentage of diamond and conductive polymer is 1:9～19; (2) Preparation of diamond/fiber flexible polishing tool with core-shell structure: ①Add the conductive polymer into the solvent, and use a magnetic stirrer for continuous stirring to ensure that the conductive polymer is fully dissolved; then divide the solution of the conductive polymer into two parts evenly; 2. Take a portion of the conductive polymer solution prepared in step (1), add diamond into it, and perform ultrasonic mixing, and the ultrasonic frequency is 20KHz to ensure that the diamond is uniformly dispersed in the solution; ③ Using coaxial electrospinning equipment, the conductive high molecular polymer solution prepared in step ① is used as the core structure solution, and the mixture of diamond and conductive high molecular polymer in step ② is used as the shell structure solution, and then electrospinning is performed. The fixed spinning voltage is 18-22kV, and the spinning distance is 5-15cm. After the spinning is completed, the obtained spinning is put into a muffle furnace and subjected to heat treatment at 180 ° C for 2 hours to obtain a diamond/shell structure with a core-shell structure. Fiber flexible polishing tool. 2 . The method for preparing a diamond/fiber flexible polishing tool with a core-shell structure according to claim 1 , wherein: the particle size of the diamond is 1 μm to 5 nm; the solvent is N,N-dimethyl One of formamide, deionized water or ethanol; the conductive high molecular polymer is one of polyacrylonitrile, polyvinyl alcohol, chitosan, polymethyl methacrylate or polyvinylpyrrolidone.