Robin, Clement published the artcileAdsorption of poly(methacrylic acid) onto differently charged silica nanoparticles and its consequences on particles clustering, SDS of cas: 13822-56-5, the publication is Colloids and Surfaces, A: Physicochemical and Engineering Aspects (2022), 128287, database is CAplus.
This work aims at gaining a comprehensive picture of the interactions between three differently functionalized silica nanoparticles and a polyacid – PMAA namely – in aqueous media. Native silica nanoparticles and silica nanoparticles functionalized with amine or quaternary amine groups are either neg. or pos. charged with various charge densities, whereas PMAA chains display an increasing neg. charge d. as the pH is increased from 3 to 9. Adsorption isotherms were obtained by Total Organic Carbon (TOC). It was shown that native silica interacts only weakly with PMAA while stronger adsorptions were evidenced for the two amine-functionalized silica. Whereas electrostatic attractive interactions between pos.-charged surfaces and neg.-charged PMAA are driving the adsorption at pH larger than 3, hydrophobic interactions between the Pr moieties of the grafts at the silica surfaces and the Me groups of the PMAA hypercoils are dominating at low pH value. In this last case, the more hydrophobic the silica surface is, the higher the adsorption. Contrary to expectations, hydrophobic interactions (dominating at low pH) seem to be stronger than attractive electrostatic interactions (dominating at pH larger than 3) as adsorbed amounts are larger in the first case. Small-angle X-ray scattering experiments were performed on PMAA/silica dispersions under the condition of saturation adsorption in order to correlate the extent of particle dispersion with polymer/surface interactions. The stronger the polymer/surface interactions, the more compact aggregates are formed.
Colloids and Surfaces, A: Physicochemical and Engineering Aspects published new progress about 13822-56-5. 13822-56-5 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is 3-(Trimethoxysilyl)propan-1-amine, and the molecular formula is C6H17NO3Si, SDS of cas: 13822-56-5.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia