Designing method for realizing self-folding of high polymer by macroscale

A design method and polymer technology, applied in the field of polymer self-folding design, can solve problems such as difficult control of experimental conditions and complicated experimental equipment

Inactive Publication Date: 2019-01-15

HOHAI UNIV

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AI-Extracted Technical Summary

Problems solved by technology

To overcome the problems of complex experimental equipment and...

Method used

[0046] Compared with the self-folding design methods of the prior art - most of them are designed on the micron scale, and need to use electric field, magnetic field, local light heating and solution stimulation to realize the self-folding of the polymer. The design method in this technical solution increases the design scale from the micron level to the centimeter level, and only uses the external stimulus of temperature, which makes the experimental equipment relatively simple (water bath heating), and the experimental conditions are easy to control (heating in a constant temperature water bath box) , the experimental operation is simple and easy (put the polymer and rubber for 1 hour after pasting, and put it in a 70°C constant temperature water bath for 5 minutes), which makes the design method relatively simple.

[0056] Compared with the self-folding design methods of the prior art - most of them are designed on the micron scale, and need to use electric field, magnetic field, local light heating and solution stimulation to realize the self-folding of the polymer. The design method in this technical solution increases the design scale from the micron level to the centimeter level, and only uses the external stimulus of ...

Abstract

The invention relates to a designing method for realizing self-folding of a high polymer by macroscale. The method comprises the following steps: pre-deforming a glass type high polymer with shape memorizing property; controlling the length and the deformation size; dismounting; controlling the geometric sizes of the high polymer and rubber as requirement; adhering the deformed high polymer and rubber; increasing the environmental temperature; and converting a complex plane structure into a three-dimensional shape. The method is realized by the macroscale; the designing level is increased frommicron level to centimeter level; one outside stimulus factor which is temperature is utilized only to enable shape recovery of the pre-stressed shape memorizing high polymer, and the rubber materialadhered to the surface of the shape memorizing high polymer performs limiting, so that the self-folding effect of double-layer materials on the high polymer plane is realized; experimental devices are simple; the experiment conditions are easily controlled; the experiment operation is simple, and easy to carry out. Therefore, the designing method is simple and convenient.

Technology Topic

Experimental DevicesThree dimensional shape +9

Image

Examples

Experimental program(3)

Example Embodiment

[0037] Example 1:

[0038] A design method for realizing polymer self-folding on a macro scale, the design method steps are as follows:

[0039] (1) The glassy polymer (1) sheet with a length of 5 cm and a width of 1 cm is stretched and deformed with a stretching machine, so that the final length is uniformly deformed to 180%, the length is 9 cm, and the width is 0.7 cm , in this embodiment, the high polymer (1) is polyethylene terephthalate-1,4-cyclohexanedimethanol;

[0040] (2) the high polymer (1) after the pre-deformation of the step (1) is cut into a small section with a length of 1cm, and then the rubber (2) is cut into a strip with a length of 6cm and a width of 1cm. In the present embodiment, The rubber (2) is silicone rubber;

[0041] (3) The strip-shaped rubber (2) is treated with a rubber surface treatment agent, and the polymer (1) is superimposed on the surface of the rubber (2) at an angle of 45°. (1) The surface in contact with the rubber (2) is pasted, and the adjacent high polymer segments are also closely pasted, such as figure 1 shown;

[0042] (4) Place it for 1 hour, put it into a constant temperature water bath at 70°C for 5 minutes, and obtain the final helical three-dimensional structure sample, such as figure 2 shown.

[0043] In Example 1, the high polymer can be replaced with any one of acrylate-based polymers, styrene-based polymers, epoxy-based polymers, vinyl polymers, and polyester-based polymers, such as polymethacrylic acid. Methyl ester, polyacrylic acid, polystyrene, styrene-butadiene block copolymer, polypropylene oxide, polyethylene oxide, polyethylene, polyethylene/nylon-6 graft copolymer, polyterephthalene Ethylene glycol formate, etc.

[0044] In embodiment 1, the silicone rubber can be replaced with any one of the heat-resistant rubbers, such as styrene-butadiene rubber, nitrile-butadiene rubber, neoprene rubber, polyacrylate rubber, silicone rubber, fluorine rubber, polysulfide rubber, polyurethane rubber, Chlorohydrin rubber, acrylate rubber, etc.

[0045] In this embodiment, the design method of polymer self-folding is realized on the macro scale, and only the external stimulus of temperature is used to restore the shape of the pre-strained shape memory polymer, which is bonded by its surface. The confinement of the rubber material realizes the self-folding effect of the polymer planar bilayer material, and finally obtains a helical three-dimensional shape.

[0046] Compared with the existing self-folding design methods, most of which are designed on the micron scale, and need to use electric fields, magnetic fields, local light heating and solution stimulation to realize the self-folding of polymers. The design method in this technical solution increases the design scale from the micron level to the centimeter level, and only uses an external stimulus such as temperature, so that the experimental equipment is relatively simple (heating in a water bath), and the experimental conditions are easy to control (heating in a constant temperature water bath) , the experimental operation is simple and easy (the polymer and the rubber are pasted for 1 hour, and then placed in a constant temperature water bath at 70 °C for 5 minutes), which makes the design method relatively simple.

Example Embodiment

[0047] Example 2:

[0048] A design method for realizing polymer self-folding on a macro scale, the design method steps are as follows:

[0049] (1) The glassy polymer (1) sheet with a length of 5 cm and a width of 1 cm is stretched and deformed with a stretching machine, so that the final length is uniformly deformed to 180%, the length is 9 cm, and the width is 0.7 cm , in this embodiment, the high polymer (1) is polyethylene terephthalate-1,4-cyclohexanedimethanol;

[0050](2) the high polymer (1) after the pre-deformation of step (1) is cut into a small section with a length of 3cm, and then the rubber (2) is cut into a sheet with a length of 5cm and a width of 3cm. In the present embodiment, The rubber (2) is silicone rubber;

[0051] (3) The strip-shaped rubber (2) is treated with a rubber surface treatment agent, and the small sections of the high polymer (1) are evenly superimposed on the surface of the rubber (2), and the long and sheet rubber ( 2) are parallel to each other (the two are at a 0° angle), use instant adhesive to stick the surface of the polymer (1) and the rubber (2) in contact, such as image 3 shown;

[0052] (4) Place for 1 hour, put it in a constant temperature water bath at 70°C for 5 minutes, and obtain the final three-dimensional structure sample in the shape of a round tube, such as Figure 4 shown.

[0053] In Example 1, the high polymer can be replaced with any one of acrylate-based polymers, styrene-based polymers, epoxy-based polymers, vinyl polymers, and polyester-based polymers, such as polymethacrylic acid. Methyl ester, polyacrylic acid, polystyrene, styrene-butadiene block copolymer, polypropylene oxide, polyethylene oxide, polyethylene, polyethylene/nylon-6 graft copolymer, polyterephthalene Ethylene glycol formate, etc.

[0054] In embodiment 1, the silicone rubber can be replaced with any one of the heat-resistant rubbers, such as styrene-butadiene rubber, nitrile-butadiene rubber, neoprene rubber, polyacrylate rubber, silicone rubber, fluorine rubber, polysulfide rubber, polyurethane rubber, Chlorohydrin rubber, acrylate rubber, etc.

[0055] In this embodiment, the design method of polymer self-folding is realized on the macro scale, and only the external stimulus of temperature is used to restore the shape of the pre-strained shape memory polymer, which is bonded by its surface. The confinement of the rubber material realizes the self-folding effect of the high-polymer planar bilayer material, and finally obtains a three-dimensional shape of a round tube.

[0056] Compared with the existing self-folding design methods, most of which are designed on the micron scale, and need to use electric fields, magnetic fields, local light heating and solution stimulation to realize the self-folding of polymers. The design method in this technical solution increases the design scale from the micron level to the centimeter level, and only uses an external stimulus such as temperature, so that the experimental equipment is relatively simple (heating in a water bath), and the experimental conditions are easy to control (heating in a constant temperature water bath) , the experimental operation is simple and easy (the polymer and the rubber are pasted for 1 hour, and then placed in a constant temperature water bath at 70 °C for 5 minutes), which makes the design method relatively simple.

Example Embodiment

[0057] Example 3:

[0058] A design method for realizing polymer self-folding on a macro scale, the design method steps are as follows:

[0059] (1) The glassy polymer (1) sheet with a length of 5 cm and a width of 1 cm is stretched and deformed with a stretching machine, so that the final length is uniformly deformed to 180%, the length is 9 cm, and the width is 0.7 cm , in this embodiment, the high polymer (1) is polyethylene terephthalate-1,4-cyclohexanedimethanol;

[0060] (2) The high polymer (1) after the pre-deformation in step (1) is not treated, and then the rubber (2) is cut into strips with a length of 9 cm and a width of 0.7 cm. In this embodiment, the rubber (2) is Silicone Rubber;

[0061] (3) Treat the strip-shaped rubber (2) with a rubber surface treatment agent, uniformly superimpose the polymer (1) on the surface of the rubber (2), and place the polymer (1) and the strip-shaped rubber (2) on the surface of the rubber (2). parallel to each other (the two are at a 0° angle), use instant adhesive to stick the surface of the polymer (1) and the rubber (2) in contact, such as Figure 5 shown;

[0062] (4) Place for 1 hour, put it in a constant temperature water bath at 70°C for 5 minutes, and obtain the final annular three-dimensional structure sample, such as Image 6 shown.

[0063] In Example 1, the high polymer can be replaced with any one of acrylate-based polymers, styrene-based polymers, epoxy-based polymers, vinyl polymers, and polyester-based polymers, such as polymethacrylic acid. Methyl ester, polyacrylic acid, polystyrene, styrene-butadiene block copolymer, polypropylene oxide, polyethylene oxide, polyethylene, polyethylene/nylon-6 graft copolymer, polyterephthalene Ethylene glycol formate, etc.

[0064] In embodiment 1, the silicone rubber can be replaced with any one of the heat-resistant rubbers, such as styrene-butadiene rubber, nitrile-butadiene rubber, neoprene rubber, polyacrylate rubber, silicone rubber, fluorine rubber, polysulfide rubber, polyurethane rubber, Chlorohydrin rubber, acrylate rubber, etc.

[0065] In this embodiment, the design method of polymer self-folding is realized on the macro scale, and only the external stimulus of temperature is used to restore the shape of the pre-strained shape memory polymer, which is bonded by its surface. The confinement of the rubber material realizes the self-folding effect of the high-polymer planar bilayer material, and finally obtains a three-dimensional annular shape.

[0066] Compared with the existing self-folding design methods, most of which are designed on the micron scale, and need to use electric fields, magnetic fields, local light heating and solution stimulation to realize the self-folding of polymers. The design method in this technical solution increases the design scale from the micron level to the centimeter level, and only uses an external stimulus such as temperature, so that the experimental equipment is relatively simple (heating in a water bath), and the experimental conditions are easy to control (heating in a constant temperature water bath) , the experimental operation is simple and easy (the polymer and the rubber are pasted for 1 hour, and then placed in a constant temperature water bath at 70 °C for 5 minutes), which makes the design method relatively simple.

PUM

Property	Measurement	Unit
Length	>= 0.5	cm
Width	>= 0.5	cm
Length	9.0	cm

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