Method for preparing porous array polyethylene template

A technology of porous arrays and polyethylene, applied in the manufacture of microstructure devices, techniques for producing decorative surface effects, decorative arts, etc., can solve problems such as the difficulty of directly preparing alloys or metal nanowire array materials, and achieve continuous The effect of mass production, strong repeatability, and easy access to raw materials

Active Publication Date: 2014-01-01
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

Using this method, the three-dimensional size parameters of the nanowire array can be adjusted, especially the distance between the nanowires can be adjusted conveniently. However, due to the limitation of the processing temperature, it is difficult to directly prepare alloys or metal nanowire array materials with high melting points.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]The preform consists of a polystyrene rod with a diameter of about 0.9 mm and a polyethylene tube assembly with an inner diameter of about 0.9 mm and an outer diameter of about 9 mm. The heating furnace temperature of the wire drawing device is 220°C, the extrusion speed of each level is 0.08 mm / s, the drawing speed of each level is 2 mm / s, and the diameter of the extrusion die of each level is 0.5 mm. A primary composite filament with a diameter of about 0.5 mm is obtained through primary thermal drawing, wherein the polystyrene core diameter is about 50 microns. About 200 first-grade composite filaments were cut and tightly packed and fixed in a polyethylene tube with an inner diameter of about 7.5 mm and an outer diameter of about 9 mm. After two-stage thermal stretching, an embedded micron ordered array structure with a diameter of about 0.5 mm was obtained. Secondary composite filaments in which the polystyrene wires are about 3 microns in diameter and the wire spac...

Embodiment 2

[0036] The preform consists of a polystyrene rod with a diameter of about 2.8 mm and a polyethylene tube assembly with an inner diameter of about 2.8 mm and an outer diameter of about 9 mm. The heating furnace temperature of the wire drawing device was 200°C. All the other procedures and parameters are the same as in Example 1. The tertiary composite filament is sliced ​​and polystyrene is dissolved to prepare a porous polyethylene template with a pore diameter of about 2 microns and a pore spacing of about 3 microns.

Embodiment 3

[0038] The diameter of the extrusion die for the three-stage stretching is 1 mm. The heating furnace temperature of the wire drawing device was 240°C. All the other procedures and parameters are the same as in Example 1. The tertiary composite filament is sliced ​​and polystyrene is dissolved to prepare a porous polyethylene template with a pore diameter of about 400 nanometers and a pore spacing of about 3 microns.

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Abstract

The invention provides a method for preparing a porous array polyethylene template. The method includes the steps that first, first-stage thermal stretch is carried out on a preformed bar in a drawing device, wherein the pre-formed bar is formed by polyethylene and polystyrene; second, prepared first-stage stretch composite filaments are closely packed and fixed; third, second-stage thermal stretch is carried out; fourth, third-stage thermal stretch is carried out after prepared second-stage stretch composite filaments are closely packed and fixed; fifth, slicing and dissolution treatment are carried out on the composite filaments. The pore diameter of the porous array polyethylene template can be adjusted between dozens of nanometers and dozens of micrometers, and the pore gap of the porous array polyethylene template can be adjusted between hundreds of nanometers and dozens of micrometers. According to the method for preparing the porous array polyethylene template, the structure size of the porous array polyethylene template can be adjusted and controlled, production cost is low, repeatability is good, and continuous production can be realized.

Description

technical field [0001] The invention relates to a preparation method of a porous array polyethylene template. Background technique [0002] Porous template materials use the size and position constraints of template channels to grow nanowires / tubes into required diameters, lengths, and have a certain arrangement. It is an ideal method for synthesizing nanowire arrays. The nanowire array material refers to a material in which a large number of nanowires are arranged in parallel in a vertical array on the substrate plane. Due to its highly oriented morphology and superior physical and chemical properties, it has important application potential in optoelectronic devices, sensors, data storage and biomedicine. The miniaturization of devices also puts forward higher requirements for new nano-functional materials. How to control the structural size and arrangement of nanowire arrays so that they can be assembled and compounded according to certain rules is very important for in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B81C1/00
Inventor 杨波吴卫东周秀文牛高何伟刘旭东余斌朱晔
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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