as long as you take a shot in infrared light, the small plastic sheet of the original plane will bend and curl up:

it seems to be a little cute.

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this is a research progress reported on Chemistry World some time ago. There are many potential and advantages in changing the plane into polymer flakes of various solid shapes by a simple method. For example, their processing and storage process will be more convenient (because it is flat), and after deformation can also achieve a variety of functions.

so, how does the little guy control the deformation this time? In fact, it is very simple, that is, it uses a plastic material that shrinks when heated to a certain extent, and then selectively prints some black ink on it.

and then what? As long as the infrared light is fine. Because it is easier for places with black ink to absorb infrared heat, the degree of contraction in each place on the small plastic sheet will be unbalanced. In this way, it will naturally be deformed in the desired way.

these small plastic sheets can keep their shape very well. For example, the researchers used this method to make a "small claw" to grasp the screw, and it is quite strong:

see here. It seems to be an ordinary style of science and technology news painting, which looks a little interesting, but it seems to be a little far away from life-but wait! It's not that simple!

out of curiosity, I glanced at the paper and saw that the researchers said they were using a heat-shrinkable plastic sheet product called Grafix ®Shrink Film.

Hey, wait, wait.

so I searched for it:

then the truth came out. This thing seems to be the heat shrink film that handmade lovers use to make trinkets.

the pattern can be printed, then heated and shrunk into a small shape, which can be made into a variety of cute things like this:

this thing, it can also publish papers!

Source: https://www.chemistryworld.com/news/shape-memory-polymers-get-a-grip/2500501.article

paper here: http://pubs.rsc.org/en/Content/ArticleLanding/2017/SM/c7sm00088j#!divAbstract

this thing, it can also publish papers!

Source: https://www.chemistryworld.com/news/shape-memory-polymers-get-a-grip/2500501.article

paper here: http://pubs.rsc.org/en/Content/ArticleLanding/2017/SM/c7sm00088j#!divAbstract