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4D-printed ceramic preparation method and 4D-printed space capsule and unfolding method thereof

A ceramic preparation and space capsule technology, which is applied in transportation and packaging, aerospace equipment, space navigation equipment, etc., can solve the problems of limited application range and field, heavy weight of rigid space capsule, and inability to adapt to the space environment. The effect of heavy, small size, and large launch space

Active Publication Date: 2019-04-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of elastomer-derived ceramics only achieves temporary shape fixation by constructing a three-dimensional simple stacked bracket structure, and then using origami and external mold fixation, which also greatly limits its application range and field, and cannot adapt to complex space. surroundings
Traditional rigid space capsules have the disadvantages of heavy weight and large launch space, while inflatable flexible space capsules are light in weight and small in size, but there are risks of gas leakage and collapse

Method used

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  • 4D-printed ceramic preparation method and 4D-printed space capsule and unfolding method thereof
  • 4D-printed ceramic preparation method and 4D-printed space capsule and unfolding method thereof
  • 4D-printed ceramic preparation method and 4D-printed space capsule and unfolding method thereof

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Embodiment 1

[0050] This embodiment provides a preparation method suitable for 4D printing ceramics, the specific steps are:

[0051] S1. Prepare a ceramic precursor solution for 3D printing, the matrix material of the ceramic precursor solution is a shape memory polymer or a mixture of a shape memory polymer and an elastomer;

[0052] S2. The ceramic precursor solution is formed by direct writing printing to construct a 3D printing polymer precursor structure, and the 3D printing polymer precursor structure is a three-dimensional structure with a shape memory effect;

[0053] S3. Shape the 3D printed polymer precursor structure into a temporary shape. After being stimulated by the outside world, the 3D printed polymer precursor structure returns from the temporary shape to the original three-dimensional structure to obtain a 4D ceramic precursor structure with a shape The 3D printed polymer precursor structure of memory effect can still change shape after being manufactured, showing the c...

Embodiment 2

[0092] This example takes polyetherimide shape memory polymer as an example to illustrate the preparation process of a 4D printed ceramic:

[0093] 1. Dry polyetherimide in a vacuum oven at 50°C for 12 hours to remove water;

[0094] 2. Mix the dry polyetherimide and PDMS at a volume ratio of 7:1 and use it as a ceramic precursor matrix solution;

[0095] 3. Mix the ceramic precursor matrix solution and the silica reinforced particles according to the volume ratio of 7:3 with a three-roll machine to obtain the ceramic precursor solution; during the whole solution preparation process, seal the bottle cap with a sealing film Sealed to prevent volatilization or contamination of water-based solutions;

[0096] 4. Degas the ceramic precursor solution and seal it for use. At the same time, all steps are carried out in a dry environment to prevent moisture adsorption;

[0097] 5. The ceramic precursor solution is directly printed with ink to form a three-dimensional 3D printing pol...

Embodiment 3

[0105] combine Figure 3-4 As shown, this embodiment provides a 4D printing space capsule, including a cabin body 5 and a docking port 4, the cabin body 5 is prepared by the above-mentioned 4D printing ceramic preparation method; the cabin body 5 is open at both ends Hollow cavity, the docking port 4 is fixedly connected with the open end of the cabin body, the cabin body 5 can be formed into a temporary shape at the material transition temperature, and return to the original shape after being stimulated by the outside. That is, before the launch of the space capsule, the body of the capsule is a 3D printed polymer precursor structure in a temporary shape prepared by a 4D printing ceramic preparation method. After the space capsule is transported to a predetermined space position, the 3D printed polymer precursor can be The structure is heated back to the initial unfolded state to become a 4D ceramic precursor; then continue to increase to the sintering temperature to sinter t...

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Abstract

The invention provides a 4D-printed ceramic preparation method and a 4D-printed space capsule and an unfolding method thereof. Specific steps for preparing the 4D-printed ceramic is as follows: preparing a ceramic precursor solution, wherein a matrix material of the ceramic precursor solution is shape memory polymer or shape memory polymer and elastomer mixture; performing write-through printing on the ceramic precursor solution to construct a 3D-printing polymer precursor structure; shaping the 3D-printing polymer precursor structure as a temporary shape, and recovering the 3D-printing polymer precursor structure to the initial three-dimensional structure after receiving external excitation so as to acquire the 4D ceramic precursor structure; and finally performing high-temperature sintering on the 4D ceramic precursor structure to obtain the 4D-printed ceramic. Through the 4D-printed ceramic preparation method provided by the invention, the multi-dimensional designability of the ceramic precursor three-dimensional structure shape can be increased, and the application range of the 4D-printed ceramic field can be broadened.

Description

technical field [0001] The invention relates to the field of ceramics, in particular to a preparation method for 4D printing ceramics, a 4D printing space capsule and a deployment method thereof. Background technique [0002] 4D printing generally refers to adding a time dimension on the basis of 3D printing, so that under certain stimuli (such as heat, water, magnetic field, current, ultraviolet light, etc.), the shape and function of 3D printed objects can be programmed to change over time. 4D printing technology is mostly used in polymer materials, including hydrogels, shape memory polymers, etc. [0003] The existing 3D printed ceramic precursor materials are usually difficult to self-deform, and the molding method is stereolithography; the material system is complex, and the curing process is greatly affected by light, wavelength, curing agent, initiator, etc., which limits The development of 4D printing ceramics. It has also been reported that by printing elastomer-d...

Claims

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Application Information

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IPC IPC(8): C04B35/622B64G1/22
CPCB64G1/22C04B35/622C04B2235/3217C04B2235/3244C04B2235/3826C04B2235/3843C04B2235/386C04B2235/3873C04B2235/3886C04B2235/483C04B2235/60
Inventor 冷劲松刘彦菊万雪明光清张风华
Owner HARBIN INST OF TECH
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