Preparing method for hydrocarbon polymer hollow microspheres

A hydrocarbon polymer and hollow microsphere technology, which is applied in the field of laser inertial confinement fusion materials preparation, can solve problems such as difficult to meet the requirements, and achieve the effects of controllable wall thickness, easy research, good concentricity and uniformity of wall thickness

Inactive Publication Date: 2016-04-20
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method mainly uses aerosol spray or liquid droplets to control the wall thickness uniformity of hydrocarbon polymer hollow microspheres, which is difficult to meet the requirements of laser inertial confinement fusion for the material of the ablation layer of the target pellet.

Method used

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  • Preparing method for hydrocarbon polymer hollow microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of Hydrocarbon Polymer Hollow Microspheres

[0018] Step 1. Select a poly-α-methylstyrene mandrel with a diameter range of 1000 μm±50 μm, and place the microspheres in the sample tray of the device.

[0019] Step 2. Close the device and vacuum to 1.0×10 -3 Pa, and then feed a mixed gas of 0.4 sccm of trans-dibutene and 10 sccm of hydrogen, and adjust the internal pressure of the device to 10 Pa.

[0020] Step 3. Turn on the 40.68MHz RF power supply and adjust it to 15W to ionize the working gas to form plasma.

[0021] Step 4, start the vacuum motor to drive the poly-α-methylstyrene mandrel to roll in the sample tray, so that the glow discharge hydrocarbon polymer is deposited on the surface of the microsphere for 200 hours.

[0022] Step 5. Heat the product prepared in step 4 to 300°C under a nitrogen atmosphere, and keep the temperature for 24 hours to remove the poly-α-methylstyrene mandrel in the inner layer. After cooling to room temperature, a diamet...

Embodiment 2

[0025] Preparation of Hydrocarbon Polymer Hollow Microspheres

[0026] Step 1. Select a poly-α-methylstyrene mandrel with a diameter range of 500 μm±20 μm, and place the microspheres in the sample tray of the device.

[0027] Step 2. Close the device and vacuum to 1.0×10 -3 Pa, and then feed a mixed gas of 0.6 sccm of trans-dibutene and 10 sccm of hydrogen, and adjust the pressure in the device to 15 Pa.

[0028] Step 3. Turn on the 40.68MHz RF power supply and adjust it to 20W to ionize the working gas to form plasma.

[0029] Step 4, start the vacuum motor to drive the poly-α-methylstyrene mandrel to roll in the sample tray, so that the glow discharge hydrocarbon polymer is deposited on the surface of the microsphere for 20 hours.

[0030] Step 5. Heat the product prepared in step 4 to 300°C under a nitrogen atmosphere, and keep the temperature for 24 hours to remove the poly-α-methylstyrene mandrel in the inner layer. After cooling to room temperature, a diameter of 500 μ...

Embodiment 3

[0032] Preparation of Hydrocarbon Polymer Hollow Microspheres

[0033] Step 1. Select a poly-α-methylstyrene mandrel with a diameter range of 1500 μm±50 μm, and place the microspheres in the sample tray of the device.

[0034] Step 2. Close the device and vacuum to 1.0×10 -3 Pa, and then feed a mixed gas of 0.2 sccm of trans-dibutene, 10 sccm of hydrogen and 0.1 sccm of tetramethylgermanium, and adjust the internal pressure of the device to 20 Pa.

[0035] Step 3. Turn on the 40.68MHz RF power supply and adjust it to 25W to ionize the working gas to form plasma.

[0036] Step 4, start the vacuum motor to drive the poly-α-methylstyrene mandrel to roll in the sample tray, so that the glow discharge hydrocarbon polymer is deposited on the surface of the microsphere for 10 hours.

[0037] Step 5. Heat the product prepared in step 4 to 300°C under a nitrogen atmosphere, and maintain the temperature for 24 hours to remove the poly-α-methylstyrene mandrel in the inner layer. After ...

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Abstract

The invention provides a preparing method for hydrocarbon polymer hollow microspheres. The preparing method comprises the steps that firstly, a poly-alpha methyl styrene mandrel material is arranged in a sample tray of a low-pressure plasma polymerization device; secondly, vacuum pumping is carried out, mixed gas of trans-dibutene and hydrogen is introduced, and the air pressure is adjusted to range from 5 Pa to 30 Pa; thirdly, a 40.68 MHz radio-frequency power supply is switched on, power is adjusted to range from 5 W to 25 W, and trans-dibutene and hydrogen are ionized and form plasma; fourthly, the sample tray rotates to drive the poly-alpha methyl styrene mandrel material to roll in the sample tray, the height of the sample tray is adjusted to enable the poly-alpha methyl styrene mandrel material to be located in a plasma sheath, glow discharge hydrocarbon polymer coating and plating are started, and the coating and plating time is determined according to the needed thickness of a coating; fifthly, a product prepared in the third step is heated to 300 DEG C in a nitrogen environment, the temperature is kept for 24 hours, and the hydrocarbon polymer hollow microspheres are obtained after cooling. The hydrocarbon polymer hollow microspheres prepared through the method are controllable in diameter and wall thickness and good in concentricity and uniformity.

Description

technical field [0001] The invention belongs to the technical field of preparation of laser inertial confinement fusion materials, and in particular relates to a preparation method of hydrocarbon polymer hollow microspheres. It can be applied to the preparation of hydrocarbon polymer hollow microspheres with controllable diameter and wall thickness, good concentricity and uniformity. Background technique [0002] In the field of laser inertial confinement fusion, due to the high transmittance of glow discharge hydrocarbon polymer hollow microspheres, optical measurement and infrared heating of deuterium-tritium ice layers can be realized; the structure is compact without micro-defects; and the surface finish is high. The fuel container of the fusion target pellet is applied to the ablation layer material of the target pellet in the fusion ignition project. In order to successfully complete the fusion process, strict requirements are put forward for the quality of the glow d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F136/06C08J9/26C08J3/12C23C16/513
CPCC08F136/06C08J3/12C08J9/26C08J2347/00C23C16/513
Inventor 何智兵何小珊李俊李玉红王涛刘艳松
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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