Encapsulation of polymers in CTA-MCM-41 via microemulsion

Morphology, interfacial interaction, and thermal degradation of polycarbonate/MCM-41 (nano)composites

“…There is a possibility that the polymer chains (or parts of it) may penetrate the pores of the MCM-41 during the preparation process of the polymer/mesoporous filler composites. [33,34] To check whether this is probable for our system, we calculated the radius of gyration for the PC we used, and based on the value we obtained and on work done by the group of Müller et al [35][36][37] where it was shown that the radius of gyration must be significantly smaller than the a 0 value of nanoporous fillers for the polymer chains to be able to penetrate the pores, we disregarded this as a possible mechanism for the immobilization of the PC chains in the PC/MCM-41 composites.…”

Hybrid silica with bimodal mesopore system: Synthesis and catalytic evaluation

“…Formation of the mesoporous MCM-41 phase can be seen from identification of the peaks corresponding to the (100), (110), (200), and (210) diffraction planes characteristic of this phase[37][38][39]. The peaks became less well resolved as the concentration of monomer was increased, suggesting that there was a decrease in the hexagonal organization of the modified silicas, as shown previously by Araujo et al[40].The changes observed in the SAXS curves were evaluated by determining the interplanar distance of the silicas using Equation 1. The results(Table 3)showed that after the formation of CTA-MCM-41, the channels became expanded due to the presence of polymer nanoparticles in their interior.…”

Effect of Hydrothermal Treatment on Structural and Catalytic Properties of [CTA]-MCM-41 Silica

“…The hybrid silicas were prepared by the method described by [ 14 ], consisting of the hydrolysis of tetraethyl orthosilicate (TEOS) in an aqueous dispersion of cetyltrimethylammonium bromide (CTABr), at a basic pH. The molar composition of the reaction mixture was 1 TEOS:12.5 NH 4 OH:0.2 CTABr:174 H 2 O.…”