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Tegnologie

Graad 5

Tekstiele van toeka tot nou

Module 12

Ontdek tekstielstof

Agtergrond

Van die vroegste tye gedurende die Steentydperk (± 12 000 v.C.) het die eerste mense reeds klere gedra om hulle teen die natuurelemente soos hitte en koue te beskerm. Die oermense het klere van dierevelle en dele van plante gemaak, dit wil sê, dinge wat hulle uit hul natuurlike omgewing kon verkry en gebruik. Diervelle is met senings en beennaalde aanmekaar gelas om eenvoudige kledingstukke te verkry. Sade, vere en doppe is in senings geryg om as versiering te dien.

Opdrag 1

[LU 3.1]

Hier is ‘n skets van Shaka, die Zoeloe-koning wat in 1825 geleef het. Raadpleeg ‘n betroubare bron en beskryf die tradisionele kleredrag van ‘n Zoeloe-kryger en waarvan elke deel van sy uitrusting gemaak is.

Opdrag 2

[LU 3.2]

Sal jy vandag ‘n baadjie dra wat van die vel van ‘n luiperd gemaak is? Skryf redes neer vir jou antwoord.

Agtergrond

Soos die tegnologie ontwikkel het, is baie ander vesels en materiale gebruik om tekstielstof van te maak. tekstielstof word van die vesels van diere (sy, wol) of plante (linne, katoen) gemaak en word gebruik om bedekkings en versierings soos klere, matte, komberse, gordyne, ens. te maak. so het die antieke egiptenare gedurende die bronstydperk (3000 v.c.) begin om die eerste lap te weef. vandag word tekstielstof van stowwe wat uit die natuur (plante of diere) verkry word, gemaak of van stowwe wat deur die mens gemaak is (verkry van hout, olie en steenkool). dus kry ons natuurlike en mensgemaakte (sintetiese) tekstielstowwe. die eerste tekstielstowwe van plastiek (rayon, poliëster, nylon, viskose) is rondom 1850 in engeland vervaardig. plastiek word in fabrieke van olie of steenkool gemaak deurdat die chemikalieë in die stowwe onttrek word en na plastiek verander word.

Opdrag 3

Sorteer elk van die volgende voorwerpe onder natuurlike of mensgemaakte stowwe (‘n plastieksak, ‘n baadjie van pels, ‘n houtbak, ‘n glasbottel, ‘n polistireenhouer, ‘n houttafel). Gebruik die volgende opskrifte:

NATUURLIKE STOWWE MENSGEMAAKTE STOWWE

[LU 3.1]

Agtergrond

Die voordele van plastiek:

  • Dit is goedkoop om te vervaardig.
  • Dit kan verwerk word in baie verskillende vorme.
  • Dit is maklik kleurbaar.
  • Dit is baie sterk.
  • Dit hou baie lank.

Die nadele van plastiek:

  • Dit is moeilik herwinbaar.

Natuurlike stowwe

Natuurlike stowwe kan dierlik of plantaardig wees. voorbeelde van diere wat stowwe verskaf, is skape, bokke, hase, kamele, sywurms, lamas, konyne en perde. plantaardige stowwe word weer verkry van die bas, blare, sade en vrugte van sekere plante soos klapper van klapperdoppe, katoen, sisal en vlas.

Wol word van skape verkry deurdat die skape eenkeer ‘n jaar geskeer word. Een skaap lewer ongeveer 4 kg wol per jaar. Daar is verskillende skaaprasse wat verskillende soorte wol verskaf. Die wol van die merino-ras is die fynste en van die beste gehalte. Die merino-ras word veral in Australië en Suid-Afrika geteel omdat hulle baie goed aard in ‘n warm, droë klimaat. Australië is een van die bekendste wolproduserende lande in die wêreld.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Tegnologie graad 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10978/1.2
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