Diaper Genie by suchenfz


									                                            Diaper Genie
                                            Slimy Science
                                            Teacher-Directed Experiment
                                            Use a diaper to make slime?? Yuck!

Materials                                      Procedure
(Adjust Materials to # of Students)
                                               1.       Carefully cut the inner lining of a diaper.
Disposable Diapers                             2.       Remove all of the diaper powder by shaking the diaper over the cookie
(one diaper for every five students)                    sheet.
Disposable Cups                                3.       Divide the powder among the group members and scoop the powder into
Scissors                                                disposable cups.
Food Colouring                                 4.       Add a couple of drops of food colouring to a cup of distilled water.
Cookie Sheets                                           (Yellow is a funny colour)
Distilled Water                                5.       Slowly add the coloured water into the cup and stir with the Popsicle
Popsicle Sticks                                         sticks. Watch as the powder turns into a gooey gel.
Zip-lock Bags                                  6.       Store the slime in a zip-lock bag in a refrigerator.

                                               The Science

                                               Dirty diapers are pretty smelly, but the science of diapers is pretty neat.
                                               Disposable diapers were first invented in the 1950s by Marion Donovan who got
                                               the idea after using a shower curtain to cover her baby’s cloth diaper to help
                                               prevent leaks. She also realized that by including an absorbent material in the
                                               lining of a plastic diaper, it could be a very convenient disposable diaper. Today,
                                               the disposable diaper market is worth over 400 million dollars per year in Canada.
When John Bartlett, a Florida
firefighter, noticed that a
                                               All disposable diapers contain sodium polyacrylate, a super absorbent powder.
used disposable diaper was the
                                               This powder can absorb 800 times its weight in pure water and 60 times its
only thing that didn’t burn in a
                                               weigh in urine. Polyacrylate consists of polymers, molecules in the form of long
devastating house fire, it
                                               chains. The sodium (or salt) in this chemical actually links these polymers
sparked an ingenious idea.
                                               together. When a diaper gets wet, the water is absorbed through osmosis into
Sodium polyacrylate, the gooey
                                               the salty gel. When the concentration of water outside the gel is the same as on
gel in diapers, is now being
                                               the inside, the sodium polyacrylate stops absorbing and the baby’s diaper might
marketed under the name
Barricade, and is being used by
consumers to spray their
                                               Once you’ve added water to your gel, you can turn your cup upside down and the
homes in close proximity to
                                               water won’t spill. Magicians sometimes use polyacrylate to make water
wild forest fires to prevent
                                               “magically” disappear.
their homes from being
destroyed.                                     For more slimy ideas check-out the book Pure Slime by Brian Rohrig.

Slimy Science Teacher Directed Experiment
Science on the Road 2007-2008

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