From b137fc0501ec5abd69233adabce6aabff53e2880 Mon Sep 17 00:00:00 2001 From: Filippos Tourlomousis <filippos.tourlo@cba.mit.edu> Date: Thu, 19 Mar 2020 12:46:40 -0400 Subject: [PATCH] continue documenting --- index.html | 73 +++++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 53 insertions(+), 20 deletions(-) diff --git a/index.html b/index.html index edb2959..c60175d 100644 --- a/index.html +++ b/index.html @@ -60,13 +60,13 @@ <h1 class="text-sm-center">FAB-ES</h1> <h3 class="text-sm-center">Fabricatable (E)lectro(S)pinning Machines</h3> <h4 class="text-sm-center">for</h4> - <h4 class="text-sm-center">DIY Filter Production</h4> + <h4 class="text-sm-center">DIY Filter Media Production</h4> <br><br> - + <h5 class="text-sm-center">by Filippos Tourlomousis, Jiri Zemanek and Zach Fredin</h5> <h5 class='text-sm-center'>The Center for Bits and Atoms, MIT</h5> <hr> - + <h2>A. Filters: Design Specs</h2> <br> <p class="lead text-justify"> @@ -81,11 +81,13 @@ <h2>B. Process: Electrospinning</h2> <br> - <p class = "lead text-justify"> - The Electrospinning process is based on the electrohydrodynamics phenomenon, where a material substrate loaded within a syringe - with a charged needle tip attached pointing towards a grounded collector is extruded and subsequenlly stretched using a high volatage potential. - Assuming that the material substrate is viscoelastic enoough and as soon as the electrostatic stresses overcome the surface tension - of the material, fibers in a chaotic motion are deposited on teh collector. The fiber formation mechanism is shown in the video below: + <p class="lead text-justify"> + The Electrospinning process is based on the electrohydrodynamics phenomenon, where a material + substrate loaded within a syringe with a charged needle tip attached to it and pointing towards + a grounded collector, is extruded and subsequenlly stretched using a high volatage potential. + Assuming that the material substrate is viscoelastic enoough and as soon as the electrostatic stresses + overcome the surface tension of the material, fibers in a chaotic motion are deposited on the collector. + The fiber formation mechanism is shown in the video below: </p> <br> @@ -95,32 +97,53 @@ <br> <p class="lead text-justify"> - The two main types of electrospinning process are: a) solution electrospinning and b) melt electropsinning. - This classification is based on the material form used for processing with SES using polymer solution (pellets/powder - mixed with solvent) and MES using pure polymer melt without any chemical solvents. THe 3 main common components - for both processes are: a) extrusion device that can be either mechanical using a syringe pump or pneumatic, - b) a high-voltage power supply and c) a collector that in the most basic setup is a flat grounded aluminum plate. + The two main types of electrospinning process are: a) solution electrospinning (SES) and b) melt + electrospinning (MES). This classification is based on the material form used for processing; with SES using + a polymer solution (pellets/powder mixed with solvent) and MES using pure polymer melt without any chemical solvents. + The 3 main common system components for both process types are: a) the extrusion device that can be either + mechanical using a syringe pump or pneumatic, b) a high-voltage power supply and c) a collector that in + the most basic setup is a flat grounded aluminum plate. </p> <br> <img src="img/ses-vs-mes.PNG" class="rounded mx-auto d-block" width="80%"> <br> + <p class="lead text-justify"> + Different types of nozzles and collectors assembled either in a horizontal or vertical configuarations have been + reported in the literature leading to different types of electrospinning processes. Each electrospinning process + has advantages and disadvantages depending on the application. + </p> + <hr> + + <h2>C. What is the best type of electrospinning process for rapid diy breathing filter media production? + </h2> <p class="lead text-justify"> - D0ifferent types of extrusion, nozzles and collectors assembled either in horizontal or vertical configuarations have been - reported in the literature leading to different types of electrospinning processes. Each electrospinning process has advantages - and disadvantages depending on the application. + - high-throughput<br> + - multiple nozzles<br> + - rolling collector<br> + - polymer solution for functionalization<br> + - hydrophobicity<br> + - anti-viral material<br> + - fast cheap assembly<br> </p> - <hr> + <p class="lead text-justify"> + Below in Section "D" we propose 3 different types of electrospinning machines of varying complexity and capabilities staring + from the simplest one that can be made with off-the0shelf components that might be laying around in a hospital, moving to a + simple design that reducing the cost, is parallelizable and can be made in a fab lab using a laser cutter and a 3D printer and + resulting to a slightly more advanced for increaed throughput. + </p> - <h2>C. FAB-ES Machine Collection</h2> + <hr> + <h2>D. FAB-ES Machine Collection</h2> <p class="lead text-justify"> Designs with increasing complexity/capabilities </p> <br> <h2 class="text-sm-center" id="fabes1">FAB-ES Machine #1</h2> - <h4 class="text-sm-center" id="fabes1">The simplest ES machine made using mostly off-the-shelf parts found in a hospital</h4> + <h4 class="text-sm-center" id="fabes1">The simplest ES machine made using mostly off-the-shelf parts + found in a hospital</h4> <p class="lead text-justify"> <b><u>Parts:</u></b> @@ -149,7 +172,7 @@ <li>Aligator Clips</li> <li>Electrical Tape</li> </p> - + <br> <img src="img/img-es-meshes.PNG" class="rounded mx-auto d-block" width="80%"> @@ -159,6 +182,16 @@ <h2 class="text-sm-center" id="fabes1">FAB-ES Machine #2</h2> <h4 class="text-sm-center" id="fabes1">The simplest fabricatable ES machine design</h4> + <hr> + + <h2 class="text-sm-center" id="fabes1">FAB-ES Machine #3</h2> + <h4 class="text-sm-center" id="fabes1">Roll-to-Roll Multinozzle Solution Electrospinning</h4> + + <hr> + + <h2 class="text-sm-center" id="fabes1">FAB-ES Machine #3</h2> + <h4 class="text-sm-center" id="fabes1">Roll-to-Roll Blowing Electrospinning</h4> + </div> -- GitLab