I have a 100 gr hollow glass sphere (silica particle) that I sell to Aldrich but the surface coating doesn't aggregate and I want to coat 3- amino propylen tri ethoxy silane for modification in and use in the epoxy matrix.
My method for separating the last coated is to put in the furnace but at 500 C. I should see them chemically absorbed together. I used a surfactant.
In sol- gel method in the modification of a hollow glass sphere or silica aerogel using a furnace, why is the hollow glass sphere not chemically absorbed? How might I do this? Please refer me to references.
I think that you must make hydroxyl group on your silica sphere to react with amino triethoxy silane, and on the other hand hydrolysis must occured on your aminosilane triethoxide , then this modification will occurs.
the question is confusing. Sol-gel process means in situ generation of ailica/silicate in the polymer matrix. Here, you are talking about coating an existing filler with a silane.
Further, for doing a sol-gel process, presence of at least, small amount of water is necessary- I do not think, a temperature of about 500C is needed for this.
You can do a high speed mixing of the silane with the glass microsphere and add the coated filler to the epoxy.
thanks a lot Mrs I talking about heat insulation organic paint.and It is a additive to us.
500 C is needed for prevent a coating least.and I coated the new amino silane.
but
thanks.
If you have information about formulation of heat insulation paint please help me.
Dear Mr Rezaee,
please give me your e mail address- I will send the full text as desired
B.Kothandaraman