Antibacterial Modification of Microcrystalline Cellulose by Grafting Copolymerization

Abstract

Microcrystalline cellulose (MCC) has the advantage of a high specific surface area as compared to that of conventional cellulose fibers. In this study the monomer methacrylamide (MAM) was used to treat MCC by grafting copolymerization. SEM, FTIR, and solid 13 C NMR were used to characterize the morphology and composition of MAM-g-MCC. After the chlorination of MAM-g-MCC with 10% sodium hypochlorite solution, the grafted MCC exhibited antibacterial activity as a result of the formation of N-Cl bonds. The thermal stability, antibacterial ability, and storage stability of chlorinated MAM-g-MCC were also studied. The results showed that the chlorinated MAM-g-MCC had excellent storage stability and could inactivate all S. aureus and E. coli O157:H7 within 10 min.

Synthesis of Multi‐Functionalized N–Cl Hydantoin Polyurethane for Chemical Warfare Agent Decomposition with High N–Cl Stability

“…In addition, the surface area of those antibiotic films will be much lower than our catalytic NIPS membrane or electrospun web. Although there are few numbers of papers describing high stability of N‐Cl at high concentration, we cannot obtain enough stability at high concentration with large surface area . These results will be, again, the reason why the detoxification efficiency of nanofiber web is much lower than that of NIPS membrane.…”

“…Moreover, the electron‐donating methyl groups on hydantoin can help to stabilize N‐Cl form . Several researches have also paid their attention on the stability of N‐Cl as described in Supporting Information 1 . Based on the previous literature, the N‐Cl groups seem to be quite stable and have long enough shelter time before usage.…”

“…So far, studies on the synthesis, production, and application of N‐Cl have been relatively well established using various types of polymers . Polyurethane, polyamide, and polyester have been adopted in order to introduce N‐halide groups, which can be used as a strong oxidant for biocidal and catalytic applications . In general, the hydantoin moiety, the heterocyclic nitrogen compound, can be easily decorated by halogen compounds compared to N‐H groups in urethane chain that have less reactivity for N‐Cl conversion in given condition .…”

Porosity reduction of polyethylene glycol phase change materials by using nanoscale thermal‐energy‐conducting medium during crystallization process

“…reported that the volume expansion of paraffin–stearic acid, paraffin–palmitic acid, and stearic–myristic acid PCM mixtures were equal to 12%, 12%, and 10%, respectively. Li et al . used PEG as a PCM and modified wood as porous media in their preliminary studies.…”