Hydrophobic Sand

[apothecary]

http://poststuff5.entensity.net/082905/med...a=magicsand.wmv

Simply this is sand that will avoid water and water will not "stick" to the sand. Column like structures are formed when this sand is poured into water, this is so it minimizes the contact with the water. The sand will remain dry when in water.

[Torsten]

making beaches of this stuff might stop erosion

[apothecary]

Did some more info.

This stuff is silicon dioxide:

http://www.reade.com/Products/Sand/hydroph...hobic-sand.html

[AndyAmine.]

wow, nice.. it could be used for countless things

[teonanacatl]

gf has a cup and you keep it in the freezer, when you pour some liquid into it it freezes, pretty cool i think:) i think i remeber getting this stuff with my seamonkeys when i was younger.

[smogs]

all sand is silicon dioxide... that stuff is coated in wax i think (something like that)

its cheap, and sold it alot of toystores

moose make some

[Torsten]

[Originally posted by apothecary:

This stuff is silicon dioxide:

Isn't all sand?

[Guest d0tb0y]

coating it in wax sounds pretty cool. i wonder though if its just doused in a surfectant that points it's hydrophobic ends outwards. making it with a wax might be a hard task to get it to granualise since waxes like to glob together?

edit: research:

In experimental set I, hydrophilic sand was made

hydrophobic by adding no (or 0), 3.1, 5, 5.7, and 9%

by weight of extremely water repellent octadecyltrichlorosilane

(OTS) sand. OTS sand was prepared by

mixing sand with an ethanol solution containing 48 g/l

OTS. Water repellencies of the mixtures were

obtained that ranged from wettable to extremely

water repellent.

-- http://www.bee.cornell.edu/swlab/SoilWater...d%20surfactant'

[ 01. September 2005, 13:40: Message edited by: d0tb0y/n00dle ]