shining_star
New Member
hey guys does anyone hav sum good stuff on biopolymers??? i hav just started revising and realised that my notes don't actully cover the dot point. i hav trials in couple of weeks and am freakin out!!!!!!!!!!!
-
Finished your HSC? Check out our University Discussion, Non-School forums or help out next year's HSC students! -
YOU can help the next generation of students in the community! Share your trial papers and notes on our Notes & Resources page
Biopolymers (1 Viewer)
- Thread starter shining_star
- Start date
Constip8edSkunk
Joga Bonito
isnt that 4 PHA?
underthesun
N1NJ4
- Joined
- Aug 10, 2002
- Messages
- 1,781
- Location
- At the top of Riovanes Castle
- Gender
- Undisclosed
- HSC
- 2010
or isn't that PHB?
Constip8edSkunk
Joga Bonito
PHB is a PHA i think, to b specific, a. e. is used to make PHB-PHV
shining_star
New Member
OK thanks guys il hav a look
the process for making PLA:
1. grow some corn
2. harvest your corn
3. process your corn to extract all the sugars (im not sure which sugars)
4. ferment the sugar with a microorganism like lactobacillus or lactococcus to magically turn the sugar into lactic acid (in the form of lactides, which are lactic acid rings or something)
5. chemically polymerise the lactides to form polylactic acid (PLA)
and wolah! 5 easy steps to making PLA
i think u have to talk about advantages n disadvantages to:
good
biodegradable so it may reduce land fills
made from biomass, a renewable resource
qualities comparable to PET (as a plastic type thing eg. wrapping) and nylon (as a fibre)
uses less fossil fuels in production than PET or Nylon
retains twists n folds well
bad
release CO2 n methane on decomposition
oxygen and liquid barrier properties not as good as PET
still need fossil fuels for farming n processing or corn
more expensive than normal plastics
needs land to grow crops so may take away land from agriculture
and some uses while im at it:
candy and miscellaneous wrappers because of biogradability n good clarity n good twist n fold retention
temporary medical sutures n drug delivery systems becoz of biodegradability
clothes and carpet fibres because of good fibre quality (mayb cheaper 2)
1. grow some corn
2. harvest your corn
3. process your corn to extract all the sugars (im not sure which sugars)
4. ferment the sugar with a microorganism like lactobacillus or lactococcus to magically turn the sugar into lactic acid (in the form of lactides, which are lactic acid rings or something)
5. chemically polymerise the lactides to form polylactic acid (PLA)
and wolah! 5 easy steps to making PLA
i think u have to talk about advantages n disadvantages to:
good
biodegradable so it may reduce land fills
made from biomass, a renewable resource
qualities comparable to PET (as a plastic type thing eg. wrapping) and nylon (as a fibre)
uses less fossil fuels in production than PET or Nylon
retains twists n folds well
bad
release CO2 n methane on decomposition
oxygen and liquid barrier properties not as good as PET
still need fossil fuels for farming n processing or corn
more expensive than normal plastics
needs land to grow crops so may take away land from agriculture
and some uses while im at it:
candy and miscellaneous wrappers because of biogradability n good clarity n good twist n fold retention
temporary medical sutures n drug delivery systems becoz of biodegradability
clothes and carpet fibres because of good fibre quality (mayb cheaper 2)