Hyperbranched polymer nanofibrous membrane grafted with silver nanoparticles for dual antifouling and antibacterial properties against Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa

Maziya, Khona; Dlamini, Bhekisisa C.; Malinga, Soraya P.

doi:10.1016/j.reactfunctpolym.2020.104494

Cited by 32 publications

(19 citation statements)

References 44 publications

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“…In order to determine the antibacterial activity of the sample, Escherichia coli (Gram-negative bacteria, China General Microbiological Culture Collection Center, Beijing, China) and Staphylococcus aureus (Gram-positive bacteria, China General Microbiological Culture Collection Center, Beijing, China) were selected for antibacterial experiments [ 26 ]. (1) Measure the MIC (minimum inhibitory concentration): the fresh LB medium (Luria-Bertani medium) was divided into several glass test tubes, 5 mL per tube, and used after high temperature sterilization.…”

Section: Methodsmentioning

confidence: 99%

Hybrid Polydopamine/Ag Shell-Encapsulated Magnetic Fe3O4 Nanosphere with High Antibacterial Activity

Fang

Zhang

et al. 2020

Materials

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The bacteria, which usually contaminate water environment, often cause terrible infectious diseases thus seriously threaten people’s health. To meet the increasing requirement of the public health care, an easily separable nanomaterial with sustainable anti-bacteria performance is required. This work reports a Fe3O4@PDA/Ag/PDA core-shell nanosphere in which the Ag nanocrystals immobilized on the magnetic carrier are protected by an external polydopamine (PDA) layer. The magnetic hybrid nanospheres are constructed by a tunable coating method and the particle parameters can be effectively controlled by the experimental condition. The antibacterial potential of the nanospheres is evaluable by using the Staphylococcus aureus and Escherichia coli as the models. The results indicate the Fe3O4@PDA/Ag/PDA core-shell nanospheres have a high antibacterial performance by measuring the minimum inhibitory concentration and the minimum bactericidal concentration. Finally, the product is expected to have a sustainable activity because the protecting PDA layer reduce the releasing rate of the Ag+ ions and the materials can be magnetically recovered from the media after the disinfection procedure.

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Section: Methodsmentioning

confidence: 99%

Hybrid Polydopamine/Ag Shell-Encapsulated Magnetic Fe3O4 Nanosphere with High Antibacterial Activity

Fang

Zhang

et al. 2020

Materials

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“…PESAM/Ag nanohybrid showed a sharp crystalline diffraction peak at 38 corresponding to (111) plane of AgNPs. 21 A broad non-crystalline peak (18)(19)(20)(21)(22)(23)(24)(25) was also recognized implying the amorphous nature of the hyperbranched polymer (Fig. 4).…”

Section: Formation Of Pesam/ag Nanohybridmentioning

confidence: 96%

“…These ndings indicated that the developed composite lm possesses signicant antibacterial potential when compared with the PES/ PEI/Ag composite lm reported by Khona et al that displayed inhibition zone of about 10 mm against S. aureus. 22 The biocidal potential of (PES/PESAM/Ag) composite is derived from AgNPs. One of the well-known mechanisms is the oxidation of AgNPs to silver ions that released from the lm and interact with the thiol groups in protein and enzymes found on the cellular surface, leading to protein deactivation and bacterial death.…”

Section: Formation Of Pes/pesam/ag Composite Lmmentioning

confidence: 99%

“…20 In this context, hyperbranched polyethylenimine and hyperbranched polyamidoamine have been reported for the in situ formation of antimicrobial colloidal silver nanoparticles. 21,22 In this work, hyperbranched polyester-amide (PESAM) based on phthalic anhydride and diisopropanolamine was evaluated as self-reducing and capping agent for in situ formation of AgNPs nanohybrid. In addition, a composite lm of PES and hyperbranched PESAM was developed using phase inversion method.…”

Section: Introductionmentioning

confidence: 99%

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Antifouling and antimicrobial polyethersulfone/hyperbranched polyester-amide/Ag composite

et al. 2020

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“…used graphene oxide and silane functionalized graphene to enhance the hydrophilicity of PVDF membranes for better antifouling resistance [53]. In another study, Maziya et al grafted silver nanoparticles onto hyperbranched polymer nanofibrous membranes in order to enhance its dual antifouling properties [54]. Other researchers have reported the incorporation of different nanomaterials to increase membrane hydrophilicity [55][56][57].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Zwitterion, p(MAO-DMPA), on the Internal Structure, Fouling Characteristics, and Dye Rejection Mechanism of PVDF Membranes

2020

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The zwitterion poly-(maleic anhydride-alt-1-octadecene-3-(dimethylamino)-1-propylamine) (p(MAO-DMPA)) synthesized using a ring-opening reaction was used as a poly(vinylidene fluoride) (PVDF) membrane modifier/additive during phase inversion process. The zwitterion was characterized using proton nuclear magnetic resonance (1HNMR) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). Atomic force microscopy (AFM), field emission scanning electron microscope (SEM), FTIR, and contact angle measurements were taken for the membranes. The effect of the zwitterionization content on membrane performance indicators such as pure water flux, membrane fouling, and dye rejection was investigated. The morphology of the membranes showed that the increase in the zwitterion amount led to a general decrease in pore size with a concomitant increase in the number of membrane surface pores. The surface roughness was not particularly affected by the amount of the additive; however, the internal structure was greatly influenced, leading to varying rejection mechanisms for the larger dye molecule. On the other hand, the wettability of the membranes initially decreased with increasing content to a certain point and then increased as the membrane homogeneity changed at higher zwitterion percentages. Flux and fouling properties were enhanced through the addition of zwitterion compared to the pristine PVDF membrane. The high (>90%) rejection of anionic dye, Congo red, indicated that these membranes behaved as ultrafiltration (UF). In comparison, the cationic dye, rhodamine 6G, was only rejected to <70%, with rejection being predominantly electrostatic-based. This work shows that zwitterion addition imparted good membrane performance to PVDF membranes up to an optimum content whereby membrane homogeneity was compromised, leading to poor performance at its higher loading.

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Hyperbranched polymer nanofibrous membrane grafted with silver nanoparticles for dual antifouling and antibacterial properties against Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa

Cited by 32 publications

References 44 publications

Hybrid Polydopamine/Ag Shell-Encapsulated Magnetic Fe3O4 Nanosphere with High Antibacterial Activity

Hybrid Polydopamine/Ag Shell-Encapsulated Magnetic Fe3O4 Nanosphere with High Antibacterial Activity

Antifouling and antimicrobial polyethersulfone/hyperbranched polyester-amide/Ag composite

Effect of the Zwitterion, p(MAO-DMPA), on the Internal Structure, Fouling Characteristics, and Dye Rejection Mechanism of PVDF Membranes

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