scholarly journals Influence of cationic surfactants on physical and mechanical properties of polymer compositions

2020 ◽  
Vol 82 (1) ◽  
pp. 225-229
Author(s):  
N. S. Shmakova ◽  
I. A. Kirsh ◽  
V. A. Romanova
Keyword(s):  
Mechanical Properties ◽  
Quaternary Ammonium ◽  
Cationic Surfactants ◽  
Antimicrobial Properties ◽  
Physical And Mechanical Properties ◽  
Polymer Processing ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Polymer Composition ◽  
Packaging Materials

When creating filled polymer composite materials, difficulties often arise due to poor compatibility of polymers with modifying additives. To solve such problems, surface-active substances (SAS) are successfully used in many industries, but they are practically not used in polymer processing. This is largely due to the insufficient assortment of surfactants produced that are suitable for introduction into polymers, especially film-forming ones. Anionic and nonionic surfactants are used in the synthesis and processing of elastomers, but they are not used in the production of film materials. As for the use of cationic surfactants, there are still no data at all. They differ from other types of surfactants in a variety of structures, in the number and relative positions of cationic centers and hydrophobic radicals, and also in antimicrobial properties. The prospects of using quaternary ammonium salts for the modification of packaging materials are shown. The expediency of using cationic surfactants for the modification of polymeric materials is proved. It is shown that the use of quaternary ammonium salts improves the physical and mechanical properties of films based on polyethylene and polypropylene. It is proved that cationic surfactants are technologically compatible with polyolefins, which allows the processing of polymer compositions by extrusion. Today, the most common polymers for food packaging are polyethylene and polypropylene. This is due to their low cost, safety in contact with food products, and suitability for processing into films of different thicknesses. More and more attention is being paid to the creation of packaging materials with antimicrobial properties. The imparting of such properties is achieved by introducing an antimicrobial additive into the polymer melt. It is most expedient to introduce additives directly into the melt of the polymer composition during processing, since, for example, during the extrusion process, polymer homogenization with the additive.

scholarly journals MODIFIED POLYSACCHARIDES APPLICATION FOR ANTISEPTIC LEATHER PROCESSING

2019 ◽  
pp. 209-214
Author(s):  
Viktoriia Plavan ◽  
Olena Ishchenko ◽  
Ilya Resnytskyi ◽  
Iryna Liashok ◽  
Daria Kuchynska
Keyword(s):  
Quaternary Ammonium ◽  
Physical And Mechanical Properties ◽  
Polymeric Materials ◽  
Air Permeability ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Polymer Composition ◽  
Target Setting ◽  
Leather Processing ◽  
Antiseptic Treatment

Urgency of the research. The leather is very sensitive to microbial degradation during processing, storage, transportation and use. Therefore, it is important to search for preparations and methods of leather treatment, providing specific fungicidal properties, depending on the purpose. Target setting. To establish the possibility of using a composition based on modified polysaccharides with the addition of PVA and Quaternary ammonium salts for leather treatment to give fungicidal properties. Actual scientific researches and issues analysis. Recent open access publications have been reviewed regarding polymeric materials, antiseptic and fungicidal preparations used to obtain of insole leather with special properties. Uninvestigated parts of general matters defining. The principle of action of many fungicidal or bactericidal products when used together has not been established. In particular, in the case of the simultaneous use of modified polysaccharides and quaternary ammonium salts for antiseptic treatment of the leather. The research objective. The purpose of the work is to research antiseptic properties of the coating based on modified polysaccharides with the addition of quaternary ammonium salts (QASc) for insole leather. The statement of basic materials. It is established that the polymer composition based on modified starch and polyvinyl alcohol with the addition of a quarter of ammonium salts gives the leather antiseptic properties, this is proved by the delay of growth of microorganisms by 3-4 mm from the edge of the sample. The relative air permeability of the leather is reduced by almost half (from 1.18 · 103 to 0.54 · 103 cm3 / cm2 • h), the leather porosity is also reduced by 5-10 % and the stiffness is increased by 40 %. Conclusions. As a result of the conducted researches it is established that although treatment of leather surface by a solution CMS: PVA and QASс reduction of the tensile strength of leather but in its physical and mechanical properties the treated leather meets the requirements for the lining, has antiseptic properties and can be used for the manufacture of insoles.

scholarly journals Synthesis and Correlation of Aggregation and Antimicrobial Properties of Homochiral Quaternary Ammonium Bromides Derived from Camphoric Acid

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
R. Mikláš ◽  
N. Miklášová ◽  
M. Bukovský
Keyword(s):  
Quaternary Ammonium ◽  
Cationic Surfactants ◽  
Antifungal Agents ◽  
Inhibitory Concentration ◽  
Antimicrobial Properties ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
The Novel ◽  
Benzalkonium Bromide ◽  
Camphoric Acid

Abstract A group of homochiral quaternary ammonium salts bearing hydrophobic camphoric acid-derived moiety was synthesized and characterized. The aggregation properties of the prepared compounds were evaluated by surface tension measurements, and the critical micelle concentration (CMC) was calculated. The novel quaternary ammonium bromides were tested as antimicrobial and antifungal agents, and their minimal inhibitory concentration (MIC) was evaluated and compared to clinically used benzalkonium bromide (BAB). Correlation of MIC with CMC reveals that monomers of prepared cationic surfactants, instead of micelles, are primarily responsible for antimicrobial activity.

Physical Properties of Nylon 66/Organoclay Nanocomposites

2006 ◽  
Vol 530-531 ◽  
pp. 702-708 ◽  
Author(s):  
Edcleide Maria Araújo ◽  
K.D. Araujo ◽  
Taciana Regina de Gouveia Silva
Keyword(s):  
Mechanical Properties ◽  
Infrared Spectroscopy ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
X Ray Diffraction ◽  
Rheological Characterization ◽  
Nylon 66 ◽  
X Ray ◽  
Organically Modified

Nanocomposites containing nylon 66 and montmorillonite clay organically modified with quaternary ammonium salts were obtained via direct melt intercalation. A montmorillonite sample from Boa Vista/PB, Northeast of Brazil, was treated with three types of quaternary ammonium salts such as Genamin, Praepagen and Cetremide. After the treatment, the powder was characterized by X-ray diffraction (XRD). The produced nanocomposites were characterized by Torque Rheometer, Infrared Spectroscopy (FTIR), mechanical properties and HDT. The obtained results for rheological characterization showed that the nanocomposites did not present deterioration with the presence of modified clay. Generally, the mechanical properties of tensile of the systems presented superior values compared to that of pure Ny 66. HDT's properties presented very interesting values for the nanocomposites and significantly larger than for pure nylon 66.

Some quaternary ammonium salts and their antimicrobial properties

1975 ◽  
Vol 9 (1) ◽  
pp. 23-25
Author(s):  
A. A. Gamburyan ◽  
N. A. Babiyan ◽  
Yu. Z. Ter-Zakharyan ◽  
L. A. Shatverova ◽  
O. L. Mndzhoyan
Keyword(s):  
Quaternary Ammonium ◽  
Antimicrobial Properties ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts

scholarly journals Synthesis, Structure, Surface and Antimicrobial Properties of New Oligomeric Quaternary Ammonium Salts with Aromatic Spacers

Molecules ◽  
2017 ◽  
Vol 22 (11) ◽  
pp. 1810 ◽  
Author(s):  
Bogumił Brycki ◽  
Anna Koziróg ◽  
Iwona Kowalczyk ◽  
Tomasz Pospieszny ◽  
Paulina Materna ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Antimicrobial Properties ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Structure Surface

scholarly journals Development of a polymer composition to protect textile material from bio-damage

2021 ◽  
pp. 43-46
Author(s):  
A. Burkitbay ◽  
V. M. Satayeva
Keyword(s):  
Mechanical Properties ◽  
Polyvinyl Alcohol ◽  
Antimicrobial Properties ◽  
Physical And Mechanical Properties ◽  
Silver Ions ◽  
Operating Conditions ◽  
Textile Material ◽  
Polymer Composition ◽  
Negative Effects ◽  
Textile Materials

The article presents a method for increasing the microbiological resistance of textile materials under operating conditions. Studies were conducted using polyvinyl alcohol (PVA), maleic acid (MA) and a solution of silver ions (SI). This fabric was treated with an dressing composition to improve the antimicrobial properties of the textile material. In addition, research has been conducted to identify the physical and mechanical properties of samples treated with different concentrations of dressing composition, to prevent negative effects on the protection function and practicality of wear. The study revealed the most optimal concentrations of the composition components: PVA - 8 g/l, SI - 50 ml/l, MA - 5 g/l.

Synthesis and antimicrobial evaluation of novel quaternary ammonium salts against Staphylococcus Aureus in biofilm and planktonic form

2020 ◽  
Author(s):  
Aneta Markova ◽  
Michaela Hympanova ◽  
Jan Marek ◽  
Lukas Prchal
Keyword(s):  
Quaternary Ammonium ◽  
High Resolution Mass Spectrometry ◽  
Antimicrobial Properties ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Chronic Infections ◽  
Research Activity ◽  
Main Research ◽  
Antimicrobial Potential ◽  
Antimicrobial Evaluation

<p><strong>Introduction: </strong>Quaternary ammonium salts (QASs) are widely spread cationic surfactants applicable in various industrial branches. QASs manifesting antibacterial effect contain hydrophilic core and a long alkyl chain in the structure. These compounds have strong antimicrobial activity against certain bacteria strains especially non-spore forming, yeasts, or protozoa. S. Aureus is a frequent cause of nosocomial infections and plays an important role in the persistence of chronic infections, especially when it’s attached to medical implants and host tissue, and developed in mature biofilm. Either way, this pathogen represents a significant burden on the healthcare system and new antimicrobial compounds are always required in clinical practice.</p> <p><strong>Hypothesis and aims: </strong>Our main research activity involves the synthesis of novel compounds based on QASs and evaluating their eradication ability against pathogenic S. Aureus in biofilm and free-floating form and subsequent effectivity comparison against these two different bacterial states. </p> <p><strong>Methodology: </strong>All newly prepared compounds were prepared by the nucleophilic reaction, verified by Nuclear Magnetic Resonance (NMR) and High-Resolution Mass Spectrometry (HR-MS). The antimicrobial properties were evaluated by microdilution broth assay and by Calgary device based assay with MIC, MBC, and MBEC as outcomes.</p> <p><strong>Results: </strong>Series of novel QAS were prepared and verified. The MICs, MBCs, and MBECs were measured for all substances and have shown antimicrobial potential against S. Aureus in both states, however higher concentration was needed for biofilm eradication. The activities of newly prepared compounds were comparable to QASs based disinfections already known and commonly used in practice.</p> <p><strong>Conclusion: </strong>Series of synthesized compounds underwent antimicrobial evaluation and several compounds have shown antimicrobial potential against S. Aureus in planktonic and biofilm form.</p>

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