Synthesis of P(NIPAM-co-Am)/Mesoporous Silica Composites and Their Temperature- Responsive Anion Exchange

Abstract

The purpose of this study is to examine the structure and the temperature-responsive anion exchange property of amino-functionalized mesoporous silica coated with temperature-responsive copolymer, poly(N-isopropylacrylamide-co-acrylamide) (P(NIPAM-co-Am)). For this purpose, the composites which contained 0, 10, or 20 wt% of Am were synthesized. From the TG results, it was found that the amounts of copolymer immobilized on the mesoporous silica were 1.6-2.6 wt%. XRD patterns revealed that the structures of composites were hexagonal and almost the same as that of original mesoporous silica without polymer. At low temperature the methyl orange (MO) anions adsorbed and desorbed reversibly with changing pH of the solution, while at high temperature the MO anions did not. This temperature, at which the amount of adsorbed MO anions changed considerably, shifted to the higher temperature side with increasing the amount of added Am.

3D-Printed Mesoporous Carrier System for Delivery of Poorly Soluble Drugs

“…The patterns of filament and print of MMC reveal a broad halo at 2θ~20 • , characteristic of amorphous samples. MCM-41 reveals an XRD pattern with peaks in low 2θ values, consistent with previous works [12,61]. The diffractogram of the physical mixture of MCM-41 with the drug presents peaks ascribed to both MCM-41 and celecoxib, with the peaks associated with celecoxib being significantly lower in intensity.…”

Preparation of Sulfhydryl Functionalized Mesoporous Silica Particles and Application in Adsorption of Cd<sup>2+</sup>

“…Yeung [10] prepared the ordered mesoporous silica adsorbents by grafting amino-and carboxylic-containing functional groups to remove acid blue 25 and Methylene blue dyes from water. Murakami [11] synthesized aminofunctionalized mesoporous silica coated with the temperature-responsive copolymer, poly(N-isopropyl acrylamide-co-acrylamide) (P(NIPAM-co-Am)), and investigated the temperature dependence of the adsorption/desorption of the methyl orange (MO) anions. Chen and He [12] synthesized functional chiral porous silica nanorods by a one-step process.…”