Stability of antibacterial modification of nanofibrous PA6/DTAB membrane during air filtration

Ryšánek, Petr; Čapková, Pavla; Štojdl, Jiří; Trögl, Josef; Benada, Oldřich; Kormunda, Martin; Kolská, Zdeňka; Munzarová, Marcela

doi:10.1016/j.msec.2018.11.065

Cited by 16 publications

(9 citation statements)

References 49 publications

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“…AcOH colloidal solutions of CePER and CeAMM were mixed directly with polymer PA6 solution in 2:1 acetic/formic acid before electrospinning to integrate CeNPs into the nanofiber structure. XRD analysis of the pristine and CeNP-modified PA6 nanofibers shows a characteristic diffraction pattern between 16 and 26° 2θ, indicating the presence of both α and γ phases of PA6, consistent with previous findings. , Interestingly, the modification of PA6 fibers with CeNPs does not lead to smoothing and broadening of the reflection profiles due to the restriction of PA6 crystallization, which leads to the formation of smaller crystalline domains in the modified fibers, as observed previously in the case of modification of PA6 nanofibers with DTAB, BTAB, or CHX antibacterial agents. , On the contrary, both types of CeNPs in the nanofibers promote PA6 crystallization, as evident from the highly intense and sharper diffraction lines. Furthermore, diffraction lines related to CeO 2 were clearly visible in PA6 fibers modified with CeAMM, while only the most intense diffraction line belonging to the (111) planes of CeO 2 can be recognized in PA6-CePER.…”

Section: Resultssupporting

confidence: 92%

Electrospun PA6 Nanofibers Bearing the CeO₂ Dephosphorylation Catalyst

Henych,

Ryšánek,

Št’astný

et al. 2023

ACS Omega

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Two types of CeO2 nanoparticles (CeNPs) prepared by low-temperature (<100 °C) precipitation methods in water were successfully immobilized in a matrix of electrospun PA6 nanofibers. The colloidal solutions of CeNPs in AcOH were directly mixed with the polymer solution before the needle electrospinning process, thereby achieving their good dispersion in the nanofibers. CeNPs embedded in the structure and on the surface of nanofibers exposing their reactive surfaces showed robust dephosphorylation catalytic activity, as demonstrated by monitoring the hydrolytic cleavage of three phosphodiester molecules (p-NP-TMP, p-NPPC, BNPP) in water by the HPLC method. This procedure allowed us to study the kinetics and mechanism of the hydrolytic cleavage and the ability of immobilized CeNPs to cleave different types of P–O bonds. One of the main hydrolysis products, p-nitrophenol, was effectively adsorbed on PA6 nanofibers, which may allow the selective separation of the degradation products after hydrolysis.

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Section: Resultssupporting

confidence: 92%

Electrospun PA6 Nanofibers Bearing the CeO₂ Dephosphorylation Catalyst

Henych,

Ryšánek,

Št’astný

et al. 2023

ACS Omega

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“…According to the literature, using a one-step technology (i.e., antimicrobial agent DTAB in a spinning solution), a DTAB-modified antimicrobial hybrid membrane was obtained on the surface of the fibers. Antimicrobial activity has been demonstrated even at low DTAB concentrations (0.5% by weight) [22,23].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Antimicrobial Coatings from Cross-Linked Copolymers Containing Quaternary Dodecyl-Ammonium Compounds

Druvari

Antonopoulou

Lainioti

et al. 2021

IJMS

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One of the concerns today’s societies face is the development of resistant pathogenic microorganisms. The need to tackle this problem has driven the development of innovative antimicrobial materials capable of killing or inhibiting the growth of microorganisms. The present study investigates the dependence of the antimicrobial activity and solubility properties on the hydrophilicity/hydrophobicity ratio of antimicrobial coatings based on quaternary ammonium compounds. In this line, suitable hydrophilic and hydrophobic structural units were selected for synthesizing the antimicrobial copolymers poly(4-vinylbenzyl dimethyldodecylammonium chloride-co-acrylic acid), P(VBCDDA-co-AA20) and poly(dodecyltrimethylammonium 4-styrene sulfonate-co-glycidyl methacrylate), P(SSAmC12-co-GMA20), bearing an alkyl chain of 12 carbons either through covalent bonding or through electrostatic interaction. The cross-linking reaction of the carboxylic group of acrylic acid (AA) with the epoxide group of glycidyl methacrylate (GMA) of these two series of reactive antimicrobial copolymers was explored in blends, obtained through solution casting after curing at various temperatures. The release of the final products in pure water and NaCl 1 M solutions (as analyzed by gravimetry and total organic carbon, TOC/total nitrogen, TN analyses), could be controlled by the coating composition. The cross-linked polymeric membranes of composition 60/40 w/w % ratios led to 97.8 and 99.7% mortality for Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), respectively, whereas the coating 20/80 w/w % resulted in 96.6 and 99.8% cell reduction. Despite the decrease in hydrophobicity (from a 16- to a 12-carbon alkyl chain), the new materials maintained the killing efficacy, while at the same time resulting in increased release to the aqueous solution.

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“…The PUR nanofibers modified by the amines showed a tendency to stick to each other in bundles, and at higher concentrations, these bundles produced continuous surfaces. This behavior was not observed for short amines or other modifiers [49][50][51] and indicated the importance of the interaction energy polymer-modifier and modifier-modifier on the membrane structure. Therefore, we used molecular modeling (force field calculations) to analyze the intermolecular interactions in the PUR/TETA(TEPA) samples and to elucidate the effect observed in the HRSEM analysis (Figure 2).…”

Section: Sample MMD Nanofiber Diameter (Nm)mentioning

confidence: 89%

Permeable Membranes PUR/TETA and PUR/TEPA for CO2 Capture Prepared with One-Step Electrospinning Technology

Hoskovec

Čapková

Vostiňáková

et al. 2022

Fibers

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A simple one-step technology of wire electrospinning is presented for the manufacturing of air-permeable CO2-capturing membranes, easily transferable to industrial production lines. The design of the chemically-modified polyurethane nanofiber membranes for CO2 capture was based on a combination of molecular modeling and technological experiments using one-step electrospinning (i.e., a modifying agent dissolved directly in a spinning solution). Polyurethane (PUR Larithane), chemically modified by TETA/TEPA amines, was used in the present study for the membrane design. Special attention was paid to two key parameters significant for the design of the functional unit, i.e., the CO2 sorption capacity and air permeability which depended on the amine concentration. The optimal combination of these parameters was found for the PUR/TEPA membrane (5 wt.% of TEPA in spinning solution): the sorption capacity was 13.97 cm3/g with an air permeability of 0.020 m/s. Molecular modeling proved to be a valuable tool that helped to clarify, at the molecular level, the structure of chemically-modified nanofibrous membranes.

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Stability of antibacterial modification of nanofibrous PA6/DTAB membrane during air filtration

Cited by 16 publications

References 49 publications

Electrospun PA6 Nanofibers Bearing the CeO₂ Dephosphorylation Catalyst

Electrospun PA6 Nanofibers Bearing the CeO₂ Dephosphorylation Catalyst

Preparation of Antimicrobial Coatings from Cross-Linked Copolymers Containing Quaternary Dodecyl-Ammonium Compounds

Permeable Membranes PUR/TETA and PUR/TEPA for CO2 Capture Prepared with One-Step Electrospinning Technology

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Stability of antibacterial modification of nanofibrous PA6/DTAB membrane during air filtration

Cited by 16 publications

References 49 publications

Electrospun PA6 Nanofibers Bearing the CeO2 Dephosphorylation Catalyst

Electrospun PA6 Nanofibers Bearing the CeO2 Dephosphorylation Catalyst

Preparation of Antimicrobial Coatings from Cross-Linked Copolymers Containing Quaternary Dodecyl-Ammonium Compounds

Permeable Membranes PUR/TETA and PUR/TEPA for CO2 Capture Prepared with One-Step Electrospinning Technology

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Product

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Electrospun PA6 Nanofibers Bearing the CeO₂ Dephosphorylation Catalyst

Electrospun PA6 Nanofibers Bearing the CeO₂ Dephosphorylation Catalyst