Cómo preparar (sacado de textfiles.com)

  C. Cellulose Nitrate (Guncotton)

       Commonly   known as Smokeless powder, Nitrocellulose is  exactly  that-
it does not give off smoke when it burns.

Materials-

  70ml concentrated sulfuric acid
  30ml concentrated nitric acid
  5g absorbent cotton
  250ml 1M sodium bicarbonate
  250ml beaker
  ice bath
  tongs
  paper towels

   Place 250ml beaker in the ice bath, add 70ml sulfuric acid, 30mL
nitric acid. Divide cotton into .7g pieces. With tongs, immerse each piece in 
the acid solution for 1 minute. Next, rinse each piece in 3 successive baths
of 500mL ater. Use fresh water for each piece. Then immerse in 250mL
1M sodium bicarbonate. If it bubbles, rinse in water once more until no 
bubbling  occurs. Squeeze dry and spread on paper towels to dry overnight.

Referencias:

• https://en.wikipedia.org/wiki/Magnetite
• https://en.wikipedia.org/wiki/Magnetic_nanoparticles
• https://www.thoughtco.com/how-to-make-liquid-magnets-606319
• http://www.okbu.net/chemistry/mrjordan/hslabs/magnetite.pdf
• http://www.sciencedirect.com/science/article/pii/S0921510712000499
• http://preserve.lehigh.edu/cgi/viewcontent.cgi?article=1002&context=cas-lehighreview-vol-15
• http://pubs.acs.org/doi/abs/10.1021/ja026501x?journalCode=jacsat
• http://www.worldscientific.com/doi/pdf/10.1142/S2010194512001973
• http://www.sciencedirect.com/science/article/pii/S0167577X07001565
• https://theses.lib.vt.edu/theses/available/etd-04262007-003618/unrestricted/Qian_dissertation-4-25.pdf
• https://www.hindawi.com/journals/bca/2014/384984/
• http://rubenmorones.com/people/cv/salksdjalskd.pdf