Foldable-expandable shape memory supporting pipe and preparation method thereof

A support tube and memory technology, which is applied in the field of shape memory support tube and its preparation, can solve the problems of large volume and heavy weight, and achieve the effects of strong support capacity, light weight and improved recovery force.

Inactive Publication Date: 2010-12-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of large volume and heavy weight of the existing shape memory support tub...

Method used

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  • Foldable-expandable shape memory supporting pipe and preparation method thereof

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0010] Embodiment 1: A foldable-expandable shape-memory support tube in this embodiment is composed of a polyimide liner 4 and an outer wall wrapped around the polyimide liner, wherein the polyimide liner is outside the polyimide liner. The outer wall is composed of prepreg layer 3, electric heating layer 2 and heat insulation layer 1 from inside to outside, prepreg layer 3 is made of shape memory composite material, electric heating layer 2 is made of two layers of polyimide film and It is composed of electric heating wires arranged in a serpentine shape between two layers of polyimide film. The heat insulation layer 1 is composed of polyimide film. After the shape memory support tube is unfolded, the shape is a hollow cylindrical tube. The two ends of the shaped tube are sealed with aluminum caps respectively, and the air pipe of the polyimide liner and the electric heating wire of the electric heating layer are led out from the aluminum cap on one side of the cylindrical sha...

specific Embodiment approach 2

[0012] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the prepreg layer 3 is made of a shape memory composite material, and the preparation method of the shape memory composite material is carried out according to the following steps: a. Take 70~90 parts of epoxy resin E-51, 10~30 parts of polypropylene glycol diglycidyl ether and 12~15 parts of 4,4'-diaminodiphenylmethane, in a temperature of 80℃~85℃ Stir for 5min~10min under the same conditions, and cool down to room temperature to obtain the shape memory resin glue; b. Arrange the fibers in an oven with a temperature of 70℃~80℃ for 0.8h~1.5h, and then press the fiber cloth and shape memory resin glue The mass ratio of the solution is 1:4~9, and the shape memory resin glue prepared in step a is evenly brushed on the fiber cloth in one direction, and then placed in an oven at a temperature of 80°C~85°C for 20min~25min , to obtain a prepreg; c. Heat up the prepreg obtained in step b to 80°C~85°C ...

specific Embodiment approach 3

[0014] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the preparation method of the shape memory composite material is carried out according to the following steps: a, weigh 80 parts of epoxy resin E-51, 20 according to the ratio of parts by mass 1 part of polypropylene glycol diglycidyl ether and 13 parts of 4,4'-diaminodiphenylmethane, stirred for 8 minutes at a temperature of 82 ° C, and cooled to room temperature to obtain a shape memory resin glue; b. Arrange the fibers at a temperature Treat in an oven at 75°C for 1.0 h, then apply the shape memory resin glue prepared in step a evenly on the fiber cloth in one direction according to the mass ratio of fiber cloth to shape memory resin glue of 1:6, Then put it in an oven with a temperature of 82°C for 23 minutes to obtain a prepreg; c, raise the temperature of the prepreg obtained in step b to 83°C and keep it for 3.2 hours, continue to raise the temperature to 153°C...

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Abstract

The invention discloses a foldable-expandable shape memory supporting pipe and a preparation method thereof, relates to the shape memory supporting pipe and the preparation method thereof and solves the problems of large size and large weight of the conventional folded shape memory supporting pipe made of shape memory alloy. The product consists of an inner polyimide lining and an outer wall, wherein the outer wall consists of a prepreg layer, an electric heating layer and a heat insulating layer from inside to outside. The preparation method comprises the following steps of: preparing shape memory resin glue solution; coating the glue solution on pre-heated fiber cloth; baking and sewing the fiber cloth to obtain a prepreg pipe; arranging a heating wire between the two polyimide films to obtain the electric heating layer; placing the inner polyimide lining with cylindrical shape into the prepreg pipe; filling the pipe with air; covering the electric heating layer outside the prepreg pipe; winding the polyimide heat insulating layer on the pipe; and raising the temperature and curing to obtain the supporting pipe. The supporting pipe has the advantages of light weight, small size, and shape recovery rate of 99 to 100 percent and can be used as a spatial structural material.

Description

technical field [0001] The invention relates to a shape memory support tube and a preparation method thereof. Background technique [0002] Shape memory material is to heat the material with shape memory function that already has the original shape above its shape memory temperature, apply an external force to deform it, cool it in the deformed state, freeze the stress, and when it is heated to a certain temperature, the material can be stored The stress is released to return to the original shape. The existing shape-memory alloy support tubes used in space have strong mechanical properties, but the folded support tubes occupy a large volume and weight, which is not easy to lift into the air and carry, which limits the use of shape-memory alloys as space structural materials Applications. Contents of the invention [0003] The present invention aims to solve the problems of large volume and heavy weight of the existing shape memory support tube made of shape memory a...

Claims

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Application Information

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IPC IPC(8): B32B1/08B32B27/04B32B27/12B32B27/34B64G1/24
Inventor 刘宇艳孙鹤韩春苗谭惠丰
Owner HARBIN INST OF TECH
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