alcosol

alcosol

[′al·kə‚sȯl]
(chemistry)
Mixture of an alcohol and a colloid.
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References in periodicals archive ?
Further dehydration was needed using isometric alcosol covering trichloromethane and tertiary butyl alcohol and tertiary butyl alcohol alone, with each treatment continuing for 15 minutes in succession.
In this article, thick (~15 pm) silicon-oxo-dominated nanocomposite coatings with high transparency were fabricated by incorporating 3-methacryloxypropyltrimethoxysilane (MPS)-modified silica alcosol into a moisture-curable polysiloxane oligomer and curing with the aid of 3-aminopropyllriehtoxysilane (APS).
Silica alcosol (30% solid content, particle size = 20 nm) was purchased from Zhangjiagang Churen New Materials Co., Ltd.
Silica alcosol was added to a 50-mL round-bottom flask and magnetically stirred, and MPS was added drop-wise to the stirring vessel.
The MPS-modified silica alcosol was mixed with the as-obtained polysiloxane oligomer solution and sonicated for approximately 3 min.
Preliminary experiments showed that direct addition of silica alcosol to the as-obtained polysiloxane oligomer solution resulted in an opaque mixture.
The colloidal silica nanoparticles were centrifuged from the MPS-modified silica alcosol for FTIR characterization, as shown in Fig.
This mechanical behavior is analogous to behaviors exhibited in colloidal-silica-embedded organic coatings."' Thus, the incorporation of unmodified silica alcosol is not an efficient route to produce hard and tough coatings.
Figure 3 displays the load-hold-unload curves of silicon-oxo-dominated coatings prepared with MPS-modified silica alcosol. Samples fabricated with unmodified silica alcosol are shown for comparison.
A monotonous increase of the micromechanical properties is revealed only for coatings with S28 silica alcosol. Compared with the R0 coating, decreased rigidity is observed for all nanocomposite coatings with 5 wt% silica content.
Craievich, "Structure of Sn[O.sub.2] alcosols and films prepared by sol-gel dip coating," Journal of Non-Crystalline Solids, vol.