<< Chapter < Page Chapter >> Page >

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

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
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
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Tegnologie graad 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10978/1.2
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Tegnologie graad 5' conversation and receive update notifications?

Ask