From 3f213aac17ded740ca533306d0a2c8ce185b4d54 Mon Sep 17 00:00:00 2001
From: Paloma GR <palomagr@mit.edu>
Date: Sun, 5 Apr 2020 12:47:07 -0400
Subject: [PATCH] Update README.md

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-# Wood Pulp Filter
+# Wood Pulp Filter for Covid - 19
+
+This project is been developed by 
+[Paloma Gonzalez](http://palomagr.mit.edu/index.html) and 
+[José Tomás Domínguez](https://www.arauco.cl) in a collaboration of 
+Arauco and [UTFSM Fablab](https://www.fablabs.io/labs/fablabutfsm) and [MIT CBA](http://cba.mit.edu/).
+
+COVID-19 has generated a global demand for face masks that our supply chains haven't been able to satisfy. Therefore, there is a huge need to create new materials and manufacturing methods to fabricate face masks and filters.  We are working on a wood pulp filter that protects from Covid - 19, and  could potentially be produced anywhere where there is a wood pulp factory. Wood pulp factories are present in most regions of the world.
+
+Our goal is to physically modify wood pulp sheets to achieve the filtering performance of a N95 filter to produce a functional 
+layer for respirators / masks / PPE for the corona viruses. 
+[Wood pulp is the raw material for paper towels with the capacity of filtering particles of 0.3 μm.](https://smartairfilters.com/en/blog/paper-towel-effective-against-viruses-diy-mask/)
+The corona virus measures approximately 0.1 μm. We can modify the compaction of the layers and/ or the size of the fibers to increase their filtering capacity / breathability. 
+
+We are also developing a face mask which filters can be exchanged, 
+completely out of wood pulp to be able to use our raw material.
+[Our design is based on Wasp’s design](https://www.3dwasp.com/en/3d-printed-mask-from-3d-scanning/) but we are looking to work with injection molding 
+and/or 2 mold processes instead of 3D printing. 
+It is crucial to be able to mass produce the masks. 
+The advantage of Wasp design is that the filters are held on the inside side of the mask. 
+We think that this detail would help decrease the contamination of the filters when changing them. 
+There are also fabric masks in which these filters could work [like this one, the HKMask](url). 
+
+Key Steps: 
+SEM Measurements, measure the porosity of the wood pulp sheets; it must be >0.1um
+Particle counting measurement, measure filtering capacity of the material, the ideal scenario will be an N95 filtering capacity. 
+In case the material's porosity is bigger than 0.1um or the filtering capacity isn’t enough,  Arauco is going to modify their manufacturing process to get a tighter material, or we are going to test a Electrospinning machine. 
+Make the material Hydrophobic. 
+
+
+Filter Development
+Wood pulp sheets have the following disadvantages:
+Hydrophilic, absorbs any liquid very fast so it could have a lower life expectancy and could absorb contaminated droplets, this can be controlled through design or modifying the material properties. 
+Due to air flow, the user could inhale wood pulp fibers, we are adding wood pulp based fabrics to act as a filter. It’s relevant to point out that wood fibers aren’t toxic, you just can’t digest them. 
+FDM 3D printed masks are slow to produce and have a porosity bigger than >0.1um, we are looking to develop the plastic parts of the mask through injection molding. 
+
+
+
+
+
 
-- 
GitLab