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Nicholson Labs
  • About
  • Bioplastic
    • Tools and Materials
    • Tips and Tricks
    • Recipes (Refined Seaweed)
      • Carrageenan Ca01 (Solid, without Plasticizer)
      • Agar Ag01 (Solid, with Plasticizer)
      • Agar Ag02 (Film, with Plasticizer)
      • Agar Ag03 (Solid, with Plasticizer)
      • Agar Ag04 (Film, with Plasticizer)
      • Agar Ag05 (Solid, with Plasticizer)
      • Agar Ag06 (Solid, with Plasticizer)
      • Agar Ag07 (Foam, with Plasticizer)
      • Agar Ag08 (2-3mm Film, with Plasticizer)
      • Agar Ag09 (1.5mm Film, with Plasticizer)
      • Agar Ag10 (5mm Leather, with Plasticizer)
      • Agar Ag11 (1.5mm Film, with Plasticizer)
      • Agar Ag12 (4.5mm Film, with Plasticizer)
      • Agar Ag13 (Solid, without Plasticizer)
      • Agar Ag18 (Solid, without Plasticizer)
      • Agar Ag14 (2mm Film, without Plasticizer)
      • Agar Ag15 (3mm Film, with Plasticizer)
      • Agar Ag16 (Coating, without Plasticizer)
      • Agar Ag17 (?mm Film, with Plasticizer)
      • Agar Ag18 (4.5mm Film, with Plasticizer)
      • Agar Ag19 (Thin Film, with Plasticizer)
    • Recipes (Raw Seaweed)
      • CC01 Chrondus Crispus (Carrageenan)
      • LS01 Laminaria Saccharina (Fucodian or Alginic Acid)
      • CC02 Chrondus Crispus (Carrageenan)
      • CC03 Chrondus Crispus (Carrageenan)
      • CC04 Chrondus Crispus (Carrageenan)
      • CC05 Chrondus Crispus (Carrageenan)
      • CC06 Chrondus Crispus (Carrageenan)
    • Experiments with Bioplastic
      • Plasticizer vs. No Plasticizer
      • Freezing Bioplastic
      • Melting Bioplastic
      • Extruding Bioplastic
      • Flipped vs. Not Flipped
      • Microwaving Bioplastic
      • Burning Bioplastic
      • Heat Joining Bioplastic
      • Cooking Bioplastic
      • Water Permeability
      • Hot vs. Room Temp Drying
      • Fully Dissolving Bioplastic
      • Bioplastic in a Dehydrator
      • 3D Printing Bioplastic
      • Biodegradability
    • Science Behind Bioplastic
    • More Recipes
    • Potential Uses
  • Carbon Capture
    • Before You Start...
    • Materials
    • Test Chambers
      • Test Chamber MK1
      • Test Chamber MK2
      • Test Chamber MK3
    • Sorbent Prep
      • Sorbent #1 Prep
      • Sorbent #2 Prep
    • Tests
      • Test #1 with Sorbent #1
      • Test #2 with Sorbent #1
      • Test #3 with Sorbent #1
      • Test #4 with Sorbent #1
      • Test #5 with Sorbent #1
      • Test #6 with Sorbent #1
      • Test #7 with Sorbent #1
      • Test #8 with Sorbent #2
    • Data Analysis/Quantification
    • How Does Carbon Capture Work?
    • Further Learning
    • Was This Project a Success?
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  1. Bioplastic
  2. Experiments with Bioplastic

Water Permeability

PreviousCooking BioplasticNextHot vs. Room Temp Drying

Last updated 1 year ago

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To conduct this experiment, I used a bioplastic bag constructed from Ag12, and the process was described in the post "Heat Joining Bioplastic". The bag was grasped by soldering "helping hands", which are like alligator clips on a metal rod, though other instruments would probably serve this purpose better. Then, I injected 10 mL of water into the bag with the help of a syringe.

My setup:

The results:

The bag could hold water for a few hours (approx. 4) before water ended up on the newspaper. I couldn't tell if this was because water was actually traveling through the bioplastic, or if I joined the bioplastic poorly, but either way, it seems like I will redo the test.

An interesting thing I found is that the part of the bag that was holding the bioplastic actually started to biodegrade (or something else) a bit because it shrank and became rigid and hard, while the bioplastic that was not directly touching water didn't. By biodegrade, I mean that the glycerol started to leach out with the help of the water (I think). I think this for two reasons: (1 a sticky substance was found in the water that came through the bioplastic and (2 glycerol acts as a plasticizer which keeps things flexible, and the part touching the water lost its flexibility.

Before photo:

After photo:

Testing photo:

Notice the meniscus there. A meniscus forms when the material has a charge because water is polar and wants to stick to stuff that has a charge. So, this means the bioplastic has a charge.