총 44페이지

Huginn & Muninn
levels. Atoms in
as a large molecule consisting of many identical repeating
ⓒAlamy
thisexcitedstate
units connected together. Although natural polymers exist,
are unstable and
mostofthepolymersusedineverydaylifearesynthesized,
quickly return
withplasticbeingthemostrepresentativeexample.Polymer
to their lower
materials are not only applied to advanced industries such
energy levels
as aerospace, energy, and IT, but also used as materials
by releasing
for daily life, such as automobiles, home appliances, and
the absorbed
clothing.
energy.Asmuch
So how can high-performance suits, like the Ultraman
light is emitted
suit, be made using polymer materials? First, in order
as the amount
for the suit to have heat resistance, it must have two
o f e n e r g y
characteristics.Itshouldnoteasilycatchfire,anditshould
released at this
be made up of multiple layers to minimize the effect of
▲Laser is a beam of intense light induced by the
time. When the
external heat. Similarly, firefighting suits made of polymer
movementsofexcitedatoms.
emitted light is
materials are the best examples of heat-resistant clothing.
reflectedbythemirrors,itcollideswithotherexcitedatoms
The outer layer of a firefighting suit uses aramid fibers to
nearby, which then emit twice as much light along with
withstand temperatures of up to about 400C. Aramid is
the collided atom’s emitted light. This process of emission
shortforAromaticPolyamide:itisfivetimesstrongerthan
by collision is called “induced emission.” However, if the
steel, can withstand flames at temperatures of 400-500C,
excited atom releases the light and immediately returns
doesnoteasilytearevenwhencaughtbyexternalmaterials,
to its low energy state, colliding with other emitted light
and has a high level of durability. Another example is
wouldbeuseless.Therefore,theexcitedatomsmustbekept
polybenzimidazole,acommercialpolymermaterialthathas
morenumerousthanthelow-energyatomsbycontinuously
thehighestheatresistanceandcanwithstandtemperatures
supplyingexternalenergy.
above 600C. However, it is expensive and difficult to
How can lasers have such intense light? When induced
process, so it is not widely used. In addition, space suits
emission occurs, one excited atom emits light and then
can be considered to be the most similar to Ultraman
collides with another excited atom, which leads to
suits, as they need to be prepared for unpredictable space
stimulated emission and the creation of another beam
environments and have functions beyond those of regular
of light. These two beams of light collide with other
suits. The Liquid Cooling and Ventilation Garment
excited atoms, creating four beams of light, which collide
(LCVG) included in the space suit supplies cold water
again with other atoms and double to eight, and so on.
from a Portable Life Support System (PLSS), which is a
This exponentially increasing light is emitted in various
large backpack-shaped device, and cools the space suit by
directions,butonlythelightthatisreflectedbythemirrors
circulatingcoolwaterthrough300feetoftubesclosetothe
andgatheredinthegapbetweenthembecomeslaserlight.
astronaut’sskininordertoregulatebodytemperature.This
Therefore, since many beams of light come together and
ishowhigh-performancesuitsliketheUltramansuitcanbe
extend in one direction, lasers can produce intense light
made using
ⓒSpacekids
likeUltraman’sSpaciumBeam.
polymer
materials.
PlasticRebornasaHigh-PerformanceSuit:Polymer
How can a special suit protect Ultraman? Although the
principle of the Ultraman suit has yet to be revealed, it is
assumedtobecomposedofamixtureofpolymermaterials
and various future technologies. The Korea Institute of
ScienceandTechnology(KIST)definesapolymermaterial
▲Polymer is used for high-performance suit such as
spacesuit.Spacesuitmadeofpolymerhasvariousabilities
toprotectastronautsinouterspace.
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