Hydrophilic Quaternary Ammonium Ionenes—Is There an Influence of Backbone Flexibility and Topology on Antibacterial Properties?

In this study, intelligent eco-diapers are made by combining antibacterial yarns coated with quaternary ammonium salts with conductive yarns to improve caretaking for urinary incontinence. The combination of conductive yarns and sensors can detect the moisture content in eco-diapers, and an alarm is sent when moisture is significant. A wireless module is used to send detected signals to a smartphone or tablet PC via the Internet. This concept is used for a scenario in which nurses do not randomly check on patients in a long-term care institution. When used offline, eco-diapers can send caregivers an alarm for the need to change diapers via cell phones. The diameters of the copper and silver-plated copper fibers are 0.08 and 0.10 mm, respectively. Cotton yarns are twisted with copper and silver-plated copper fibers to form the conductive yarns, which are 0.12 mm in diameter. Moreover, 30-count cotton and 150 D nylon yarns are coated with quaternary ammonium salt via dyeing and finishing processes to form antibacterial yarns. In the current study, intelligent eco-diapers are tested for their electrical and antibacterial properties as specified by AATC and JISL test standards.

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Synthesis and Antibacterial Properties of Several Unsaturated Quaternary Ammonium Salts

Pharmaceutical Chemistry Journal ◽

10.1007/s11094-013-0984-4 ◽

2013 ◽

Vol 47 (9) ◽

pp. 477-480 ◽

Cited By ~ 3

Author(s):

J. V. Grigoryan ◽

G. T. Sargsyan ◽

A. Kh. Gyulnazaryan ◽

R. V. Paronikyan ◽

G. M. Stepanyan

Keyword(s):

Quaternary Ammonium ◽

Antibacterial Properties ◽

Quaternary Ammonium Salts ◽

Ammonium Salts

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Quaternary ammonium chitosan/polyvinyl alcohol composites prepared by electrospinning with high antibacterial properties and filtration efficiency

Journal of Materials Science ◽

10.1007/s10853-019-03824-x ◽

2019 ◽

Vol 54 (19) ◽

pp. 12522-12532 ◽

Cited By ~ 7

Author(s):

Chenrong Wang ◽

Ji Fan ◽

Rui Xu ◽

Lishan Zhang ◽

Shan Zhong ◽

...

Keyword(s):

Polyvinyl Alcohol ◽

Quaternary Ammonium ◽

Antibacterial Properties ◽

Filtration Efficiency

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Inhibition of biofouling by modification of forward osmosis membrane using quaternary ammonium cation

Water Science & Technology ◽

10.2166/wst.2015.264 ◽

2015 ◽

Vol 72 (5) ◽

pp. 738-745 ◽

Cited By ~ 6

Author(s):

Kang-Hee Park ◽

Sang-Hyun Yu ◽

Han-Shin Kim ◽

Hee-Deung Park

Keyword(s):

Quaternary Ammonium ◽

Biofilm Formation ◽

Flow Reactor ◽

Forward Osmosis ◽

Antibacterial Properties ◽

Ammonium Cation ◽

Bacterial Viability ◽

Viability Assay ◽

Ft Ir ◽

Modified Membrane

In the operation of the forward osmosis (FO) process, biofouling of the membrane is a potentially serious problem. Development of an FO membrane with antibacterial properties could contribute to a reduction in biofouling. In this study, quaternary ammonium cation (QAC), a widely used biocidal material, was conjugated with a silane coupling agent (3-(trimethoxysilyl)-propyldimethyloctadecyl ammonium chloride) and used to modify an FO membrane to confer antibacterial properties. Fourier transform infrared spectroscopy (FT-IR) demonstrated that the conjugated QAC was successfully immobilized on the FO membrane via covalent bonding. Bacterial viability on the QAC-modified membrane was confirmed via colony count method and visualized via bacterial viability assay. The QAC membrane decreased the viability of Escherichia coli to 62% and Staphylococcus aureus to 77% versus the control membrane. Inhibition of biofilm formation on the QAC modified membrane was confirmed via anti-biofilm tests using the drip-flow reactor and FO unit, resulting in 64% and 68% inhibition in the QAC-modified membrane against the control membrane, respectively. The results demonstrate the effectiveness of the modified membrane in reducing bacterial viability and inhibiting biofilm formation, indicating the potential of QAC-modified membranes to decrease operation costs incurred by biofouling.

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