Design and synthesis of cauliflower-shaped hydroxyl functionalized core-shell polymer

Abstract

Conventional crosslinked polymers and homopolymers both have their own limitations. As a result, core-shell polymer was synthesized to obtain cauliflower-shaped and highly hydroxyl functionalized polymer. For the core, acrylate-based copolymers were synthesized by varying crosslinkers and porogens at different crosslink density. Owing to high surface area (554 m 2 /g), poly(MMA-co-DVB) was used as a core and low-molecular weight (24,600 g/mol) poly(GMA) was used as a shell in core-shell approach. Average particle sizes of the core polymers were in the range of 15-75 μm. In order to evaluate reactivity efficiency of core-shell polymer, hydroxyl content was evaluated with a value of 3.97 mmol/ g. Importantly, hydroxyl content demonstrated the successful increase in reactive sites of the core-shell polymer over conventional crosslinked hydroxyl polymer. Notably, synthesized core-shell polymer has more surface area and pore volume which substantially attributes for better polymer efficiency during application. Scanning electron microscopy images revealed the spherical, uniform, and slightly conglomerated properties of core-shell polymer. Due to higher reactivity, insolubility, and more surface area of hydroxyl functionalized core-shell polymer, its use become inevitably essential.

Rational Fabrication of Polyethylenimine-Linked Microbeads for Selective CO2 Capture

“…Infrared (IR) spectra of GMA, GMA-PEI, and three different NUT polymers (NUT-8, NUT-9, and NUT-10) were recorded with KBr wafer after drying the sample at 80 °C for 6 h and shown in Figure . IR spectrum of GMA gives peaks at 907 and 840 cm –1 , which are assigned to the epoxy stretching of the C–O bond. , Moreover, the band at 1731 cm –1 corresponds to −COO– stretching, and those at 2990–2854 cm –1 are assigned to the aliphatic −CH stretch. The IR spectrum of GMA-PEI shows 3628 and 795 cm –1 , which are ascribed to N–H stretching, 1149 cm –1 , which is assigned to C–N stretching, along with the absence of epoxy stretching peak, which confirms the successful modification of the GMA.…”

Synthesis of molecularly imprinted polymer for removal of Congo red

“…The uniformly sized MIP have advantages of possessing 'large surface area, monodispersed, colloidal stability' as compared to the irregularly shaped MIP particles. The uniform size of MIPs is the main reason to allow efficient template removal and fast binding kinetics because the binding sites are exposed to the surface [45] hence, better performance of CR1-MIP particles owed to their morphology.…”

Development of Adsorbents for Selective Carbon Capture: Role of Homo- and Cross-Coupling in Conjugated Microporous Polymers and Their Carbonized Derivatives

“…On the other hand, solid sorbents possess energy-saving regeneration, ease of preparation, and high recycle performance and are the main advantages over traditional absorption process in natural gas purification. To date, different types of sorbents such as molecular sieves, , metal organic frameworks (MOFs), , zeolites, − and polymers − have been developed for gas mixture separation and other applications. Among various alternatives, conjugated microporous polymers (CMPs) attract much attention due to their low skeletal density, synthetic diversity, and tailorable surface properties.…”