Rayon Production

 Rayon Production- Artificial Silk chemical experiment 

Rayon is a man-made fiber developed from a natural raw material called cellulose by chemical treatment. This natural base gives it many of the qualities such as low cost, diversity, and comfort. From the video they demonstrate how rayon is made through an experiment which was very interesting to watch. The substance forms by copper sulfate and baking soda by reacting with each other. He first took a beaker and poured into basic copper carbonate, then poured ammonia solution to the copper carbonate. That forms a complex compound of copper (bright blue color). Copper compound complex can dissolve cotton wool. He takes a small amount of the cotton wool and began adding it slowly to the copper complex solution. The wool is highly soluble and forms so-called viscose, which is the raw material to produce artificial silk. After the wool dissolved, the liquid, became much thicker. To acquire the artificial silk, he prepared one molar solution of a sulfuric acid. Next, he filled the syringe with a few ml of viscose, fit the needle and slowly injected the viscose into the acid solution.     

  

This is the effect we see:

                       

When viscose contacts with sulfuric acid, the cellulose from the solution begins to polymerize. Sulfuric acid reacts with complex compound of copper and dissolves it. Thin blue fibers of rayon are formed. After some time, sulfuric acid reacts with the complex compound and washes out the copper salts from the fibers. Fibers become colorless.  In this image you can see how the fibers are slowly washing out.


                   


After that, the fibers are bleached and then you can find out how they feel. Because of the type of needle he used, he said the fibers felt very soft and tore easily. 



https://www.youtube.com/watch?v=f_AvqnMTJjg&feature=youtu.be 
http://www.madehow.com/Volume-1/Rayon.html
https://www.contrado.com/blog/what-is-rayon/







Comments

  1. INT323-2021September 13, 2020 at 5:00 PM

    Very interesting - the visuals are helpful. Please post to the group blog~!

    ReplyDelete

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