Difference between revisions of "Team:Stanford-Brown/Plastic"

 
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      <p class="centerT"><b>Figure 1</b> Using infrared light, we can make the plastic polystyrene joint <br>in between the cardboard substrate to contract and fold</p>
 
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   <h1>Why plastics?</h1>
 
   <h1>Why plastics?</h1>
 
   <div class="pp">
 
   <div class="pp">
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     <p>Plastic is an extremely versatile material that can be used in a multitude of applications such as in medical devices, construction, prototyping, and much more. Currently, many common plastics require the use of petrochemicals to manufacture. To utilize the benefits and versatility of plastics in long term space travel and space colonies would require the importation of petrochemicals into space. With the limited volume and mass payloads of space travel, our team wanted to try to find an alternative to manufaturing plastics in space.</p>
+
     <p>Plastic is an extremely versatile material that can be used in a multitude of applications such as in medical devices, construction, prototyping, and much more. Currently, many common plastics require the use of petrochemicals to manufacture. To utilize the benefits and versatility of plastics in long term space travel and space colonies would require the importation of petrochemicals into space. With the limited volume and mass payloads of space travel, our team wanted to try to find an alternative to manufacturing plastics in space.</p>
  
−
     <p>Our team looked to synthetic biology to find a solution to the manufacture of plastics in space to minimize the use of petrochemicals. This summer we wanted to engineer the bacteria <i>E. Coli</i> to produce two kinds of plastic: Polystyrene and P(3HB). The prospect of being able to send a sample of bacteria into a space station or colony and having that bacteria manufacture plastic is an exciting prospect for our team.</p>
+
     <p>Our team looked to synthetic biology to find a solution to the manufacture of plastics in space to minimize the use of petrochemicals. This summer we wanted to engineer the bacteria <i>Escherichia Coli</i> to produce two kinds of plastic: Polystyrene and P(3HB). The prospect of being able to send a sample of bacteria into a space station or colony and having that bacteria manufacture plastic is an exciting prospect for our team.</p>
 
   </div><!-- end pp -->
 
   </div><!-- end pp -->
  
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   <h1>How does plastic fold?</h1>
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   <div class="row">
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    <h1>How does plastic fold?</h1>
  
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  <div class="col-md-8 pp">
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    <div class="col-md-8 pp">
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    <p>Most plastics are long organic polymers with a high molecular weight. When these long chains of monomers are prestretched in their manufacturing they have a relatively high level of organization. When heated to their glass transition temperature, these prestretched plastics will contract in the dimention that they were prestreched. With the use of pigments, (and in our case, biopigments) we can select where and how the prestretched plastic contracts. By drawing these pigments on the plastic and using infrared light from the sun, we can make the plastic fold. This is because in a flat sheet of prestretched plastic, drawing a dark line on the plastic will allow that section of the plastic to heat up and contract faster than the rest of the plastic. Having the dark line only on one side of the plastic will cause the plastic to fold toward that side as seen in <i>figure 1</i></p>
+
      <p>Most plastics are long organic polymers with a high molecular weight. When these long chains of monomers are prestretched in their manufacturing they have a relatively high level of organization. When heated to their glass transition temperature, these prestretched plastics will contract in the dimension that they were prestretched. With the use of pigments, (and in our case, biopigments) we can select where and how the prestretched plastic contracts. By drawing these pigments on the plastic and using infrared light from the sun, we can make the plastic fold. This is because in a flat sheet of prestretched plastic, drawing a dark line on the plastic will allow that section of the plastic to heat up and contract faster than the rest of the plastic. Having the dark line only on one side of the plastic will cause the plastic to fold toward that side as seen in figure 1.</p>
  
−
    <p>By having plastics fold, we can quickly prototype new designs of self polding by simply printing on biopigments onto plastic sheets and applying infrared light to the plastic. These designs can range from simple cups and containers to complex solar sails and arrays.</p>
+
      <p>By having plastics fold, we can quickly prototype new designs of self-folding by simply printing on biopigments onto plastic sheets and applying infrared light to the plastic. These designs can range from simple cups and containers to complex solar sails and arrays.</p>
−
  </div><!-- end col-md-8 -->
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    </div><!-- end col-md-8 -->
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    <div class="col-md-4">
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      <a href="https://static.igem.org/mediawiki/2015/1/14/SB2015_tapeprefold.jpg" target=_blank>
 +
      <img src="https://static.igem.org/mediawiki/2015/1/14/SB2015_tapeprefold.jpg" class="img-responsive img-rounded">
 +
    </a>
 +
    <p><b>Figure 2</b> Polystyrene joints adhered to a cardboard substrate</p>
 +
 
 +
    <a href="https://static.igem.org/mediawiki/2015/1/11/SB2015_tapepostfold.jpg" target=_blank>
 +
      <img src="https://static.igem.org/mediawiki/2015/1/11/SB2015_tapepostfold.jpg" class="img-responsive img-rounded">
 +
    </a>
 +
    <p><b>Figure 3</b> After heating joints with infrared lamp the plastic folded</p>
 +
  </div><!-- end col-md-4 -->
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 +
</div><!-- end row -->
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 +
<p class="pp">Figures 2 and 3 on the right show the before and after folding photos from figure 1. Figures 4 and 5 demonstrate the folding mechanism of using pigment on polystyrene sheets. Figures 6 and 7 below show the before and after photos of testing the degree of contraction in a two dimensionally prestretched polystyrene sheet. We find that they contract to roughly 11% of its original area. Figures 9 and 10 demonstrate the same folding mechanism as figure 1 with a different box design. Figures 11 and 12 is one of our many attempts to make a pigmented design to fold into a water tight container. Figure 13 shows some of the designs that was folded using sunlight. Figure 14 and 15 shows the microbial biopigments we grew to pigment our plastics.</p>
 +
 
 +
<div class="row">
 +
 
 +
  <div class="col-md-4">
 +
    <a href="https://static.igem.org/mediawiki/2015/c/c6/SB2015_prefold.JPG" target=_blank>
 +
      <img src="https://static.igem.org/mediawiki/2015/c/c6/SB2015_prefold.JPG" class="img-responsive img-rounded">
 +
    </a>
 +
    <p><b>Figure 4</b> Polystyrene sheet cut into a box pattern with black pigment on inner edges</p>
 +
 
 +
  </div><!-- end col-md-4 -->
  
 
   <div class="col-md-4">
 
   <div class="col-md-4">
−
  <img src="https://static.igem.org/mediawiki/2015/1/14/SB2015_tapeprefold.jpg" class="img-responsive img-rounded">
 
−
  <p><b>Figure 3</b> Polystyrene joints adhered to a cardboard substrate</p>
 
−
  <img src="https://static.igem.org/mediawiki/2015/1/11/SB2015_tapepostfold.jpg" class="img-responsive img-rounded">
 
−
  <p><b>Figure 3</b> After heating joints with infrared lamp the plastic folded</p>
 
−
</div><!-- end col-md-4 -->
 
  
−
<div class="row">
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    <a href="https://static.igem.org/mediawiki/2015/e/eb/SB2015_postfold.JPG" target=_blank>
 +
    <img src="https://static.igem.org/mediawiki/2015/e/eb/SB2015_postfold.JPG" class="img-responsive img-rounded">
 +
  </a>
 +
  <p><b>Figure 5</b> Self-folded box after applying heat from infrared lamp</p>
 +
</div><!-- col-md-4 -->
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 +
 
 
  <div class="col-md-4">
 
  <div class="col-md-4">
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   <img src="https://static.igem.org/mediawiki/2015/c/c6/SB2015_prefold.JPG" class="img-responsive img-rounded">
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   <a href="https://static.igem.org/mediawiki/2015/9/9a/SB2015_beforeshrink.jpg" target=_blank>
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   <p><b>Figure 2</b> Polystyrene sheet cut into a box pattern with black pigment on inner edges</p>
+
    <img src="https://static.igem.org/mediawiki/2015/9/9a/SB2015_beforeshrink.jpg" class="img-responsive img-rounded">
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</div><!-- end col-md-4 -->
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  </a>
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   <p><b>Figure 6</b> Before heating the plastics: Polystyrene (PS) and Polylactic Acid (PLA)</p>
 +
</div><!-- col-md-4 -->
  
 
<div class="col-md-4">
 
<div class="col-md-4">
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<img src="https://static.igem.org/mediawiki/2015/e/eb/SB2015_postfold.JPG" class="img-responsive img-rounded">
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  <a href="https://static.igem.org/mediawiki/2015/c/c0/SB2015_aftershrink.jpg" target=_blank>
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<p><b>Figure 3</b> Self-folded box after applying heat from infrared lamp</p>
+
    <img src="https://static.igem.org/mediawiki/2015/c/c0/SB2015_aftershrink.jpg" class="img-responsive img-rounded">
 +
  </a>
 +
  <p><b>Figure 7</b> After heating the plastics evenly the plastics contracted in two dimensions to 11% its original area</p>
 
</div><!-- col-md-4 -->
 
</div><!-- col-md-4 -->
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<div class="col-md-4">
 
<div class="col-md-4">
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   <img src="https://static.igem.org/mediawiki/2015/9/9a/SB2015_beforeshrink.jpg" class="img-responsive img-rounded">
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   <a href="https://static.igem.org/mediawiki/2015/4/48/SB2015_printingplastic.jpg" target=_blank>
−
   <p><b>Figure 3</b> Before heating the plastics: Polystyrene (PS) and Polylactic Acid (PLA)</p>
+
    <img src="https://static.igem.org/mediawiki/2015/4/48/SB2015_printingplastic.jpg" class="img-responsive img-rounded">
 +
  </a>
 +
   <p><b>Figure 8</b> Printing pigment on sanded plastic sheets</p>
 
</div><!-- col-md-4 -->
 
</div><!-- col-md-4 -->
  
 
<div class="col-md-4">
 
<div class="col-md-4">
−
   <img src="https://static.igem.org/mediawiki/2015/c/c0/SB2015_aftershrink.jpg" class="img-responsive img-rounded">
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   <a href="https://static.igem.org/mediawiki/2015/f/fa/SB2015_prebox.jpg" target=_blank>
−
   <p><b>Figure 3</b> After heating the plastics evenly the plastics contracted in two dimensions</p>
+
    <img src="https://static.igem.org/mediawiki/2015/f/fa/SB2015_prebox.jpg" class="img-responsive img-rounded">
 +
  </a>
 +
   <p><b>Figure 9</b> Before heating polystyrene joints adhered to cardboard substrate</p>
 
</div><!-- col-md-4 -->
 
</div><!-- col-md-4 -->
  
 
<div class="col-md-4">
 
<div class="col-md-4">
−
   <img src="https://static.igem.org/mediawiki/2015/4/48/SB2015_printingplastic.jpg" class="img-responsive img-rounded">
+
   <a href="https://static.igem.org/mediawiki/2015/b/b0/SB2015_postbox.jpg" target=_blank>
−
   <p><b>Figure 3</b> Printing pigment on sanded plastic sheets</p>
+
    <img src="https://static.igem.org/mediawiki/2015/b/b0/SB2015_postbox.jpg" class="img-responsive img-rounded">
 +
  </a>
 +
   <p><b>Figure 10</b> Heating causes the plastic to shrink and fold the cardboard</p>
 
</div><!-- col-md-4 -->
 
</div><!-- col-md-4 -->
  
 
<div class="col-md-4">
 
<div class="col-md-4">
−
   <img src="https://static.igem.org/mediawiki/2015/f/fa/SB2015_prebox.jpg" class="img-responsive img-rounded">
+
   <a href="https://static.igem.org/mediawiki/2015/c/ce/SB2015_beforesealbox.JPG" target=_blank>
−
   <p><b>Figure 3</b> Before heating polystyrene joints adhered to cardboard substrate</p>
+
    <img src="https://static.igem.org/mediawiki/2015/c/ce/SB2015_beforesealbox.JPG" class="img-responsive img-rounded">
 +
  </a>
 +
   <p><b>Figure 11</b> Simple pigment pattern on polystyrene sheet</p>
 
</div><!-- col-md-4 -->
 
</div><!-- col-md-4 -->
  
 
<div class="col-md-4">
 
<div class="col-md-4">
−
   <img src="https://static.igem.org/mediawiki/2015/b/b0/SB2015_postbox.jpg" class="img-responsive img-rounded">
+
   <a href="https://static.igem.org/mediawiki/2015/2/22/SB2015_midsealbox.JPG" target=_blank>
−
   <p><b>Figure 3</b> Heating causes the plastic to shrink and fold the cardboard</p>
+
    <img src="https://static.igem.org/mediawiki/2015/2/22/SB2015_midsealbox.JPG" class="img-responsive img-rounded">
 +
  </a>
 +
   <p><b>Figure 12</b> Plastic sheet folding up to a more cup-like container</p>
 
</div><!-- col-md-4 -->
 
</div><!-- col-md-4 -->
  
 
<div class="col-md-4">
 
<div class="col-md-4">
−
   <img src="https://static.igem.org/mediawiki/2015/e/eb/SB2015_plasticSet.JPG" class="img-responsive img-rounded">
+
   <a href="https://static.igem.org/mediawiki/2015/e/eb/SB2015_plasticSet.JPG" target=_blank>
−
   <p><b>Figure 3</b> Using sunlight to heat and bend polystyrene</p>
+
    <img src="https://static.igem.org/mediawiki/2015/e/eb/SB2015_plasticSet.JPG" class="img-responsive img-rounded">
 +
  </a>
 +
   <p><b>Figure 13</b> Using sunlight to heat and bend polystyrene</p>
 
</div><!-- col-md-4 -->
 
</div><!-- col-md-4 -->
  
 
<div class="col-md-4">
 
<div class="col-md-4">
−
   <img src="https://static.igem.org/mediawiki/2015/c/ce/SB2015_beforesealbox.JPG" class="img-responsive img-rounded">
+
   <a href="https://static.igem.org/mediawiki/2015/e/ec/SB2015_biopigmentthree.JPG" target=_blank>
−
   <p><b>Figure 3</b> Simple pigment pattern on polystyrene sheet</p>
+
    <img src="https://static.igem.org/mediawiki/2015/e/ec/SB2015_biopigmentthree.JPG" class="img-responsive img-rounded">
 +
  </a>
 +
   <p><b>Figure 14</b> Growing biopigment producing <i>E. coli</i> to use to print on plastic</p>
 
</div><!-- col-md-4 -->
 
</div><!-- col-md-4 -->
  
 
<div class="col-md-4">
 
<div class="col-md-4">
−
   <img src="https://static.igem.org/mediawiki/2015/2/22/SB2015_midsealbox.JPG" class="img-responsive img-rounded">
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   <a href="https://static.igem.org/mediawiki/2015/0/04/SB2015_yesyesyes.jpeg" target=_blank>
−
   <p><b>Figure 3</b> Plastic sheet folding up to a more cup-like container</p>
+
    <img src="https://static.igem.org/mediawiki/2015/0/04/SB2015_yesyesyes.jpeg" class="img-responsive img-rounded">
 +
  </a>
 +
   <p><b>Figure 15</b> Biopigment produced by our transformed <i>E. coli</i> on strips of plastic</p>
 
</div><!-- col-md-4 -->
 
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Latest revision as of 03:59, 19 September 2015

Plastic Folding
Testing and Applications

Figure 1 Using infrared light, we can make the plastic polystyrene joint
in between the cardboard substrate to contract and fold


Why plastics?

Plastic is an extremely versatile material that can be used in a multitude of applications such as in medical devices, construction, prototyping, and much more. Currently, many common plastics require the use of petrochemicals to manufacture. To utilize the benefits and versatility of plastics in long term space travel and space colonies would require the importation of petrochemicals into space. With the limited volume and mass payloads of space travel, our team wanted to try to find an alternative to manufacturing plastics in space.

Our team looked to synthetic biology to find a solution to the manufacture of plastics in space to minimize the use of petrochemicals. This summer we wanted to engineer the bacteria Escherichia Coli to produce two kinds of plastic: Polystyrene and P(3HB). The prospect of being able to send a sample of bacteria into a space station or colony and having that bacteria manufacture plastic is an exciting prospect for our team.

How does plastic fold?

Most plastics are long organic polymers with a high molecular weight. When these long chains of monomers are prestretched in their manufacturing they have a relatively high level of organization. When heated to their glass transition temperature, these prestretched plastics will contract in the dimension that they were prestretched. With the use of pigments, (and in our case, biopigments) we can select where and how the prestretched plastic contracts. By drawing these pigments on the plastic and using infrared light from the sun, we can make the plastic fold. This is because in a flat sheet of prestretched plastic, drawing a dark line on the plastic will allow that section of the plastic to heat up and contract faster than the rest of the plastic. Having the dark line only on one side of the plastic will cause the plastic to fold toward that side as seen in figure 1.

By having plastics fold, we can quickly prototype new designs of self-folding by simply printing on biopigments onto plastic sheets and applying infrared light to the plastic. These designs can range from simple cups and containers to complex solar sails and arrays.

Figure 2 Polystyrene joints adhered to a cardboard substrate

Figure 3 After heating joints with infrared lamp the plastic folded

Figures 2 and 3 on the right show the before and after folding photos from figure 1. Figures 4 and 5 demonstrate the folding mechanism of using pigment on polystyrene sheets. Figures 6 and 7 below show the before and after photos of testing the degree of contraction in a two dimensionally prestretched polystyrene sheet. We find that they contract to roughly 11% of its original area. Figures 9 and 10 demonstrate the same folding mechanism as figure 1 with a different box design. Figures 11 and 12 is one of our many attempts to make a pigmented design to fold into a water tight container. Figure 13 shows some of the designs that was folded using sunlight. Figure 14 and 15 shows the microbial biopigments we grew to pigment our plastics.

Figure 4 Polystyrene sheet cut into a box pattern with black pigment on inner edges

Figure 5 Self-folded box after applying heat from infrared lamp

Figure 6 Before heating the plastics: Polystyrene (PS) and Polylactic Acid (PLA)

Figure 7 After heating the plastics evenly the plastics contracted in two dimensions to 11% its original area

Figure 8 Printing pigment on sanded plastic sheets

Figure 9 Before heating polystyrene joints adhered to cardboard substrate

Figure 10 Heating causes the plastic to shrink and fold the cardboard

Figure 11 Simple pigment pattern on polystyrene sheet

Figure 12 Plastic sheet folding up to a more cup-like container

Figure 13 Using sunlight to heat and bend polystyrene

Figure 14 Growing biopigment producing E. coli to use to print on plastic

Figure 15 Biopigment produced by our transformed E. coli on strips of plastic

Copyright © 2015 Stanford-Brown iGEM Team