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Preparation method of TiO2 coating type polyurethane (PU) or thermoplastic polyurethane (TPU) film drag reduction micro-groove used for airship skins

A coating type and micro-groove technology, applied in the field of preparation of airship skin materials, can solve the problems of poor heat insulation, poor weather resistance, low load, etc., and achieve the effect of dense TiO2 coating, good protection effect and small cracks

Inactive Publication Date: 2012-09-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention aims to solve the problems of poor weather resistance, large resistance, poor heat insulation, low load and large size of the existing stratospheric airship skin, and provides a TiO 2 Preparation method of coated PU or TPU film drag-reducing micro-groove

Method used

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  • Preparation method of TiO2 coating type polyurethane (PU) or thermoplastic polyurethane (TPU) film drag reduction micro-groove used for airship skins
  • Preparation method of TiO2 coating type polyurethane (PU) or thermoplastic polyurethane (TPU) film drag reduction micro-groove used for airship skins
  • Preparation method of TiO2 coating type polyurethane (PU) or thermoplastic polyurethane (TPU) film drag reduction micro-groove used for airship skins

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specific Embodiment approach 1

[0048] Specific implementation mode 1: In this embodiment, TiO is used for airship skin 2 The preparation method of coated PU or TPU film drag-reducing micro-groove is carried out according to the following steps:

[0049] 1. Preparation of TiO 2 Sol Precursor:

[0050] a. Weigh tetrabutyl titanate, absolute ethanol, strong acid, deionized water and glacial acetic acid, wherein the ratio of tetrabutyl titanate, absolute ethanol, deionized water and glacial acetic acid is 1:10 : 3:1, the amount of substance of tetrabutyl titanate and H in strong acid + The ratio of the amount of substance is 1: (0.6~1); The strong acid is concentrated hydrochloric acid, concentrated nitric acid or concentrated sulfuric acid;

[0051] b. Take two Erlenmeyer flasks, marked as A and B, and divide the absolute ethanol measured in step a into 3 parts, of which 2 parts are placed in Erlenmeyer flask A, and 1 part is placed in Erlenmeyer flask B. , then add the glacial acetic acid measured in step...

specific Embodiment approach 2

[0062] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass fraction of concentrated hydrochloric acid described in step a is 37.5%, the mass fraction of concentrated nitric acid is 65%, and the mass fraction of concentrated sulfuric acid is 70%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0063]Specific embodiment 3: This embodiment differs from specific embodiment 1 or 2 in that: the stirring in step b uses an electric stirrer, and the stirring speed is 150-180 r / min. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method of TiO2 coating type polyurethane (PU) or thermoplastic polyurethane (TPU) film drag reduction micro-groove used for airship skins, relates to the preparation method of airship skin materials, and aims to solve the problems that the existing stratosphere airship skin is poor in weather resisting property, large in resistance, poor in thermal insulation, low in load and large in volume. The method comprises the following steps of preparing TiO2 sol precursor liquid, coating a TiO2 coating on PU or TPU film to be stamped, preparing aluminum template with a groove structure, washing the template and coating a demolding agent; and stamping the template at a temperature of 135-140 DEG C and a speed of 15-20 kg / cm<2>. The prepared TiO2 coating type PU or TPU film drag reduction micro-groove is clear in marks, good in regularity and prominent in damping reduction effect, and plays significant roles in reducing airship volume, improving load and prolonging time in air; and meanwhile, the TiO2 coating can strongly absorb ultraviolet, can shielding atom oxide, reduce harm of ultraviolet to the film, and increase the weather resisting property. The method provided by the invention can be used for preparing airship skin materials.

Description

technical field [0001] The invention relates to a preparation method of an airship skin material. Background technique [0002] Near space can also be called near space or near space. At the same time, this altitude is also the area where the stratosphere is located, above the layer of natural phenomena such as wind, rain, thunder, and lightning, and belongs to the high security zone. After entering the 21st century, the value of the special field of near space has been paid more and more attention by countries all over the world, and various military powers have regarded it as a new field of military struggle in the 21st century. In recent years, the application research of near-space airship as a communication and navigation platform has attracted worldwide attention. At present, in the process of developing near-space airships, the key technical issues involved are the focus of research by various countries. Since near-space airships are not low-altitude airships, many ...

Claims

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Application Information

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IPC IPC(8): B29C59/02B29B15/00B29B13/06B29L7/00
Inventor 刘宇艳谭惠丰马涛刘振国刘羽熙刘少柱王长国
Owner HARBIN INST OF TECH
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