Cationic quaternization of cellulose with methacryloyloxy ethyl trimethyl ammonium chloride via ATRP method

Abstract

Abstract. The synthesis of a cationic cellulose copolymer from cellulose macro-initiator (MCC-BiB) and quaternary compound monomer (METMA) via atom transfer radical polymerization (ATRP) was studied. By using dimethylformamide (DMF), the optimum condition for successful synthesis was at the mole ratio of MCC-BIB: Catalyst:METMA = 1:1:26. The highest copolymer recovery was 93.2 % for 6 h and at 40 o C. The copolymer was insoluble in weak polar solvents such as THF and DMF but soluble in methanol and water. The chemistry of cellulose copolymer was confirmed by the FTIR and TGA in which the METMA monomer was used as a reference. The absence of C=C bond in the CiB-g-METMA spectrum indicated that graft copolymerization occurred.

CO2 Capture by Reduced Graphene Oxide Monoliths with Incorporated CeO2 Grafted with Functionalized Polymer Brushes

“…The second highlighted area is 2000-1000 cm −1 (Figure 4b), where most of the peaks can be found. The characteristic C=O of the polymers can be seen in the area of 1600-1650 cm −1 (Figure 4b), which is slightly different compared with other works [28][29][30][31]. At the area 1500-1600 cm −1 (Figure 4b), the bands found for the composite particles origi-nated from the CTA grafted on the surface of the nanoparticles, since N-H (1570 cm −1 ), C(O)-NH (1580 cm −1 ), and C=O (1620 cm −1 ) were present in the structure (Figure 4b).…”

“…The second highlighted area is 2000-1000 cm −1 (Figure 4b), where most of the peaks can be found. The characteristic C=O of the polymers can be seen in the area of 1600-1650 cm −1 (Figure 4b), which is slightly different compared with other works [28][29][30][31]. At the The FTIR results clearly demonstrate the successful synthesis of the polymer brushes.…”

“…In addition, the peak centered at 2985 cm −1 (Figure 4a) was assigned to C-N + stretching vibration. In the same area, C-H symmetric and asymmetric stretching was found at 2950-2900 cm −1 (Figure 4a) [28][29][30]. The presence of C-H moieties in the composites, while they were absent in the bare CeO 2 , is the first indication of the presence of polymer brushes in the composite particles.…”

Leveraging the Dielectric Barrier Discharge Plasma Process to Create Regenerative Biocidal ePTFE Membranes

“…Meanwhile, absorption peaks at around 950 and 1484 cm –1 are observed in TMAEMA spectra which correspond to the peak of quaternary amine, N + (CH 3 ) 3 . ,, In addition, there is a broad peak located from 3200 to 3700 cm –1 which is ascribed to the O–H functional group of the aqueous solution of the TMAEMA monomer. The peak situated around 1636–1638 cm –1 correspond to the superimposed peaks of CC bond stretching of the alkene group and adsorbed water . After DBD plasma modification (Figure b), the characteristic peaks of the DMAEMA and TMAEMA can be found in the modified ePTFE films, confirming the successful plasma polymerization on the surface of ePTFE using the DBD technique.…”

Reduced Ice Adhesion Using Amphiphilic Poly(Ionic Liquid)-Based Surfaces

“…47 Although the stretching vibration of C�N was expected to be observed at around 1087 cm −1 , it coincides with the Si�CH 3 stretching vibration of the PDMS backbone. 42,48 Also, none of the stretching vibrations of the C�C group were detected in the spectra of the UV-cured coatings, suggesting the absence of any unreacted OEGDMA monomers. The spectra of the SATbased coatings were similar to those of SAC-based coatings due to the similar structure, with the only differences due to the counterion.…”