siri triboelektrik

8/18/2019 Siri Triboelektrik

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Compare and contrast the charge created using the electroscopes.

The way and electroscope works is illustrated below.

neutral charge evenlydistributed

neutral charge unevenly

distributed in presents ofanother charged object

charged

Triboelectric Series(...a series of relative affinities ~ positive and negative charges)

When two materials are brought into contact some charge will be exchanged due to the affinities below.

Note:

fur() and plastic(!) : rub plastic rod with fur should ma"e the rod negative.

sil"(!) and glass() : rub glass with sil" should get a positive rod .

MORE POSITIVE

• rabbit#s fur

• glass

• mica

• nylon

• wool

• cat#s fur

• sil"

• paper

• cotton

• wood

• acrylic

• cellophane tape

• polystyrene

•

polyethylene• rubber balloon

• saran wrap

MORE NEGATIVE


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compiled by Ken Fox of Smoky Hill High School

The Triboelectric Series of Materials Causing StaticElectricityby Ron Kurtus (revised 22 July 2003)

$tatic electricity is the collection of electrically charged particles on the surface of a material. %arious

materials have a tendency of either giving up electrons and gaining positive () charges or attracting

electrons and gaining negative (!) charges. &he list of these materials in the order of how much they become positive () or negative (!) is called the Triboelectric Series. 't is a handy tool to see which materials in

combination will create static electricity.

ow does the &riboelectric $eries compare with the eriodic &able*

What are materials in the &riboelectric $eries*

ow can the list of materials be used to create static electricity*

Compared with Periodic Table

&he &riboelectric $eries lists materials according to how li"ely they are to let go of electrons or to ta"e on

electrons from other materials. 't is somewhat parallel to +hemistry#s eriodic &able.

Periodic Table

&he eriodic &able arranges elements according to their outer orbits, such that elements li"e $odium (with

only one electron is its outer orbit) are on one side of the table and elements li"e +hlorine (with one electron

short of filling its outer orbit) are on the other side of the table. &his arrangement helps to determine which

elements will readily combine.

Triboelectric Series

-ost of the materials in the &riboelectric $eries are complex compounds and not elements. sually, there is

no chemical reaction when materials are put together, rather there is just the movement of electrons from

one material to the other.

List of materials

&he following &riboelectric $eries shows which materials will wor" the best to create static electricity when

rubbed together. /ubbing those that collect positive charges with those that collect negative charges will

produce the best results. 0ut you can also create some charges by rubbing two materials in the same section.

1or example, rubbing rabbit fur on aluminum will create some positive ( ) to collect on the rabbit fur, even

though they are both collectors of positive charges.

Collects positie char!es

&he following materials will give up electrons when brought in contact with materials, especially those that

attract electrons. &hey are in the order of most apt to give electrons to those that barely give up electrons.

2ry human s"in ( )

3eather

/abbit fur

4lass

uman hair

Nylon

Wool

3ead

$il"

5luminumaper

+otton ( )

Neutral


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&here are very few materials that do not tend to readily attract or give up electrons when brought in contact

or rubbed with other materials.

$teel ( 6 )

Collects "e!atie char!es

&he following list of materials will attract electrons when brought in contact with other materials, especially

those that give up electrons. &hey are in the order of least apt to attract electrons to those that readily attract

electrons.

Wood ( ! )

5mber

ard rubber

Nic"el, +opper

0rass, $ilver

4old, latinum

olyester

$tyrene ($tyrofoam)

$aran Wrap

olyurethane

olyethylene (li"e $cotch &ape)olypropylene

%inyl (%+)

$ilicon

&eflon ( ! ! ! ! ! ! )

Applicatio"s

7ou can use the &riboelectric $eries to determine what materials are good to use for creating static

electricity.

R#b positie materials with "e!atie1or example, rubbing your dry s"in on teflon will create the greatest imbalance of electrical charges.

/ubbing any material from the ( ) list with materials in the ( ! ) list should be good to create static

electricity.

Members of same list

0ut you can also rub materials on the same list to create an excess of charges. 1or example, some people

with dry s"in may build up charges when wearing cotton clothes. 8f course, the charges are not as great as if

they would be wearing polyester clothes. +lothes in a dryer often get static charges. olyester materials are

rubbing against each other and building up charges. 'f there are also cotton items in the dryer, even more

static cling will build up.

$r% s&i"

$ince dry s"in collects charges so readily, it is a good idea to use a moisturi9er when the humidity is very

low. &his will not only reduce the chances of getting spar"s, but will also protect the s"in.

Metals

$urprisingly some metals have a tendency to build up charges on their surfaces. 1or example, shining a piece

of brass with a wool rag will build up positive charges on the wool and negative charges on the surface of

the brass. 0ut because brass is a good conductor of electricity, those surface charges will uic"ly dissipate

through the metal.

5ll metals will allow electrons to flow freely and are often used to absorb static charges. &hat is why metalsare not usually used to created static electricity.

I" co"cl#sio"


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$tatic electricity occurs when there are an excess of positive () or negative (!) charges on an object#s

surface. 7ou can create static electricity by rubbing certain materials together. &he position of the material in

the &riboelectric $eries determines how effectively the charges will be exchanged.


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Positive (+)

Air

Human Hands

Asbestos

Rabbit's Fur

GlassHuman Hair

Mica

Nylon

Wool

Lead

Cat's Fur

Silk

Aluminum

Paper

Cotton

Steel

Wood

Lucite

Sealin !a"

Amber

Polystyrene

Polyet#ylene

Rubber balloon

Sulp#ur

Hard rubber

Nickel$ Copper

%rass$ Sil&er

Gold$ Platinum

Sulur

Acetate$ RayonPolyester

Celluloid

Polyuret#ane

Polyet#ylene

Polypropylene

(inyl

Silicon

)elon

Saran Wrap

Negative (-)

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