Highly enhanced adsorption of methyl blue on weakly cross-linked ammonium-functionalized hollow polymer particles

Solvent-free preparation of uniform styrene/maleimide copolymer microspheres from solid poly(styrene-alt-maleic anhydride) microspheres

“…The broad peak around 3450 cm −1 of NH 3 -SMI was ascribed to the N-H stretching vibration, which cannot be observed in the spectra of N-methyl SMI and N-ethyl SMI. In addition, the 1 H NMR and 13 C NMR spectra of SMA and SMI (Fig. S7 and S8 †) further support the success of the imidization reaction.…”

“…No smoothing functions or baseline corrections were used in the quantitative FTIR calculations. 1 H nuclear magnetic resonance ( 1 H NMR) and 13 C nuclear magnetic resonance ( 13 C NMR) spectra were measured in DMSO-D 6 using a Bruker AV600 spectrometer.…”

“…Polymer microspheres are a class of micro or nano scale materials which have been widely used in various fields such as enzyme/drug/catalystsupports, [1][2][3][4] water treatment, 5 chromatography, 6 tissue engineering 7 and composite materials. 8 Among these polymer microspheres, the poly(styrene-altmaleic anhydride) (SMA) microsphere has attracted intensive attention due to its excellent heat resistance as well as the high reactivity of its maleic anhydride group, 9,10 which provides the possibility for further modification including esterification, 11 hydrolysis, 12 amination, 13 imidization, 14 etc. For the coating or filling application that requires long-term chemical stability and resistance against moisture, styrene maleimide copolymers (SMI) are superior to SMA owing to the inertness of their maleimide groups.…”

Polyelectrolyte–Dye Interactions: An Overview

“…Self-assembled microgels comprised of poly(N-isopropylacrylamide- co -2-(dimethylamino) ethyl methacrylate) and sodium alginate (SA) have demonstrated a highly pH-sensitive response [ 66 ]. Methyl blue is an anionic hydrophilic dye molecule which has been reported to be adsorbed onto microgel core star ionic covalent organic polymers, polymers, fibrous materials, and cross-linked polymer particles with cavity and ammonium functionalization [ 62 , 67 , 68 , 69 ]. A quartz crystal microbalance (QCM) investigation of the interaction between anionic dyes and the SA/microgel multilayers in the aqueous phase revealed an enhanced electrostatic attraction between the dyes and the microgels deposited on the QCM sensor surface compared to that with SA in the multilayers, which caused the release of microgels from the self-assembled structure and a mass loss ratio of 27.6% [ 66 ].…”

Emulsion templated polymer monoliths containing cellulose nanocrystals: Synthesis and adsorption properties

“…In addition, high porosity allows greater amounts of contaminants to penetrate the adsorbent. 1 For an efficient adsorption of toxic contaminants, polymer-based adsorbents are mostly preferred due to their eco-friendly nature, renewability, and reported superior performance. 2,3 In this respect, an effective strategy to synthesize well-defined macroporous polymers, which is known as high internal phase emulsion (HIPE) templating, is attracting valuable attention of the scientists.…”