I want to functionalise the surface of silica particles with various silanes. After sizing them (e.g. using tri-functional amino silane in aqueous methanol solution) the particles were washed and then dried. When the particles were dried, they appeared to have essentially stuck together to form a loose solid which is hard to mix with DGEBA resin. Does anyone have any suggestions of how to prevent the particles from agglomerating/binding, but in a manner that won't negatively affect subsequent adhesion to resin? Or any suggestions for a surfactant that can be added to the microspheres while they're in solution that would help in this? Any suggestions for papers which might prove a good starting point for looking at this would be appreciated.
OK thank you very much,I have a 100 gr hollow glass sphere (silica particl)
and sell them aldrich but the coating in surface for do not agregate but I want to coated 3- amino prpylen tri ethoxy silane for modification in and use in the epoxy matrixe.my method for seprated the last coted. get in Furnace but in 500 C.I saw them the chemistry absorbed to gether.you said .I use surfactant.please you will say to me.in sol- gel method in modification hollow glass sphere .or silica aerogel. and use Furnace how I do hollow glass sphere not chemistric absorbed.
and compeletly how do I do? for work thanks ? and refer me to reffrences.
One other method that has worked for me is adding a methanol/silane 10% solution and rolling for 24 to 48 hours to disperse it in somewhat of a dry phase. Add it to the epoxy and then put under vacuum.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Composites
- Nanocomposites