Beilstein J. Nanotechnol.2016,7, 81–90, doi:10.3762/bjnano.7.10
between the (PDLA/PLLA)n stereocomplex and the cores with and without the polymeric (PSS/PAH)n/PLL multilayer precursor (PEM). Nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC) were used to characterize the chemical composition and molecular weight of poly(lactic acid) polymers
for sustained release.
Keywords: biocompatibility; layer-by-layer assembly; microcapsules; poly(lactic acids); stereocomplex; Introduction
The polycationic/polyanionic layer-by-layer (LBL) deposition on surfaces has been widely studied since the first description by Decher et al. [1][2][3]. The
) and poly(D-lactic acid) (PDLA) enantiomers, forming a racemic crystal called a stereocomplex, has been successfully realized [35]. However, PLA capsules made by the LBL technique with an entirely biocompatible procedure remain a challenge [36][37][38].
The possibility to assemble these polymers, as
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Figure 1:
The NMR spectra for PDLA (a) and PLLA (b).