Ethanolamine vs. Ethanolamine hydrochloride for glass functionalization

Folks,
I've seen some references in the literature for functionalizing glass
surfaces with amine groups using Ethanolamine hydrochloride (instead
of using silanes). The rationale being that the polymerization of
silanes on the surface into long fingers can be avoided. Since I am
not a chemist, I have a few questions

1) Is it equivalent to use Ethanolamine (H2NCH2CH2OH) instead of
Ethanolamine Hydrochloride (
H2NCH2CH2OH · HCl)

2) How good is this functionalization work vs. Silane's?

Any advice is appreciated

Sanjeevi

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