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A skin with a surface helium barrier layer and its preparation method

A technology of barrier layer and skin, applied in the field of skin materials, can solve the problems of inability to realize commercial application, high cost of multi-layer lamination, difficult to apply on a large scale, etc. low cost effect

Active Publication Date: 2018-10-23
常州第六元素半导体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the characteristics of graphene, the bonding force between layers is very weak, and the more layers, the more difficult it will be to fit; due to the higher requirements for the flatness of the bonding surface, graphene can only be pasted on the inside of the skin; In addition, the cost of multi-layer bonding is high, the process is complicated, and it is difficult to achieve large-scale application. At present, it is difficult to adopt ultra-large-scale manufacturing technology for the production of graphene films. application

Method used

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  • A skin with a surface helium barrier layer and its preparation method
  • A skin with a surface helium barrier layer and its preparation method

Examples

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Effect test

Embodiment 1

[0037] A skin with a surface helium barrier, structured as figure 1 , the surface of the skin 3 is alternately laminated with PDDA layers 1 and graphene powder layers 2, a total of 20 layers.

[0038] see figure 2 The process flow of the method is to attach the PDDA layer and the graphene powder layer to the surface of the skin by the method of mutual sticking, and the preparation method is as follows:

[0039] Attachment of PDDA layer: Attach a layer of PDDA solution on the cleaned skin by dipping and pulling. The mass fraction of PDDA solution is 0.5%. The hides are dried at 100°C to remove moisture. Among them, the skin is cleaned by ultrasonication of deionized water added with surfactant for ≥1min, then rinsed with deionized water (or ultrapure water or distilled water) for ≥3 times, and dried at 60°C to 200°C;

[0040] In addition to soaking and pulling, PDDA can be attached to the skin surface by smooth roller coating, screen roller coating, doctor blade coating, sp...

Embodiment 2

[0046] A skin with a surface helium barrier, structured as figure 1 , the surface of the skin 3 is alternately laminated with PDDA layers 1 and graphene powder layers 2, a total of 30 layers.

[0047] The preparation method is basically the same as in Example 1, except that:

[0048] 1. During the attachment process of the PDDA layer, the mass fraction of PDDA solution is 0.01wt%, and the drying temperature is 200°C;

[0049] 2. During the attachment process of the graphene powder layer, the concentration of the graphene solution is 10wt%, and the drying temperature is 60°C.

[0050] 3. Repeat the operation process of attaching the PDDA layer and the graphene powder layer 15 times each.

Embodiment 3

[0052] A skin with a surface helium barrier, structured as figure 1 , the surface of the skin 3 is alternately laminated with PDDA layers 1 and graphene powder layers 2, a total of 100 layers.

[0053] The preparation method is basically the same as in Example 1, except that:

[0054] 1. During the attachment process of the PDDA layer, the mass fraction of the PDDA solution is 10wt%, and the drying temperature is 60°C;

[0055] 2. During the attachment process of the graphene powder layer, the concentration of the graphene solution is 0.01wt%, and the drying temperature is 60°C.

[0056] 3. Repeat the operation process of attaching the PDDA layer and the graphene powder layer 50 times each.

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Abstract

The invention discloses skin provided with a surface helium gas blocking layer. The surface helium gas blocking layer is formed by alternately fitting PDDA (poly dimethyl diallyl ammonium chloride) layers and graphene powder layers, and the PDDA layer at the innermost layer is fit with the surface of the skin. With the adoption of a brand-new graphene powder and PDDA alternative fitting method, the improvement of the helium gas blocking performance of the skin of an aircraft is realized, and the permeability of helium gas is reduced to 1 / 10-1 / 5 of the original permeability. Furthermore, the surface helium gas blocking layer is light in mass, low in density, and good in flexibility, and can not influence the load carrying performance of the aircraft.

Description

technical field [0001] The present invention is a skin material with a helium barrier design, particularly for skins adjacent to space vehicles. Background technique [0002] Proximity space vehicle is a new type of proximity space multifunctional flight platform with propulsion device, controllable flight, and relying on static lift to work in the air. The working altitude is about 20Km above sea level. The flight characteristics of the aircraft determine that it has broad application prospects in the fields of military reconnaissance, space early warning, communication relay and space detection, so it is widely favored by scientists from all over the world. However, the working environment of adjacent spacecraft is very harsh: the temperature is low (the lowest temperature is about -55°C), the temperature difference between day and night is large; the density of the atmosphere is only 1 / 14 of that of the ground; the ultraviolet radiation and ozone are strongly affected. W...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C1/12
CPCB64C1/12B64C2001/0054
Inventor 秦喜超谭化兵
Owner 常州第六元素半导体有限公司
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