In acidic conditions the amine group
of CH is protonated which causes electrostatic interactions of carboxylic group of OKG with protonated CH to produce a tight network which may lead to lower water uptake at lower pH.
In this figure there was a noticeable reduction in percentage removal at lower pH values which is mainly due to the protonation of the amine group
that creates an electrostatic repulsion between the metal ions in solution and the amine group
The dye antenna is attached to the nanoparticle by reacting either a carboxylic acid, isothiocyanate or NHS ester group, on the dye with an amine group
on the functionalized nanoparticle to form an amide bond.
The zeta potential of SA containing SLNs was lower than that of DDA ones (Figure 2), probably due to the reasons aforementioned already that SA has less ability to produce hydrogen bond with HA and consequently the more free amine groups
imparting positive charge to the SLNs.
TGA experiments have shown that the PE-MCM-41 matrix itself is thermally stable up to 1000[degrees]C, whereas the decomposition of the grafted amine groups
starts already at 200-250[degrees]C [24, 26,28].
1); Step 1: monoalkylation of the amine group
; and Step 2: quaternization of the alkyl chitosan.
The presence of amine group
is expected to interact with acidic groups on the carbon black surface, resulting in an increase in the pH of the medium, which is actually seen (table 6).
Last year, Payne and graduate student Wei-Qiang Sun began to harness the reactivity of chitosan's amine group
to help streamline chemical manufacturing.
Compatibilizers containing an amine group
(am, sam, bsa) had different impacts on mechanical and rheological properties of SIL/EP systems.
An Amine Group
of Ancamine K61B Reacts With Epoxy of Resin (Fig.
However, all these routes were involving the synthesis of the primary amine group
through protection and deprotection.
reported that the grafting was achieved through a reaction between an amine group
of DETA with an epoxy group of PGMA and the adsorbent showed excellent adsorption performance for copper ions at solution pH greater than 3.