The invention discloses a novel method for preparation of a
chitosan nano carrier and functionalization thereof, which relates to the
chitosan nano carrier. The invention provides a novel method for preparation of the
chitosan nano carrier and functionalization thereof. The chitosan is dissolved in
acetic acid solution, meanwhile, pH is adjusted to 4.5-5.5 with NaOH solution, STPP (
sodium tripolyphosphate) solution is added to the chitosan solution to obtain nanogels, then, crosslinking
glutaraldehyde is provided for the chitosan,
centrifugation is conducted after ending of reaction, reduction reaction is conducted with
excess sodium borohydride, then
centrifugation is conducted again, then, the obtained compound is dispersed in
hydrochloric acid solution to remove the unreacted
sodium borohydride, then
dialysis is conducted, in order to wash STPP to obtain nanoparticles; the
folic acid is weighed to be dissolved in the
phosphate buffer solution, then the solution is added to
chitosan nanoparticles water solution, after adding EDCI to the solution,
folic acid modified nanoparticles are obtained through reaction; PEG succinimidyl
propionate is weighed to be dissolved in the
phosphate buffer solution, then is added to the
chitosan nanoparticles water solution, after reaction, PEG modified nanoparticles are obtained.