Synthesis of Phosphoric Polymer Coating Solution with Antimicrobial Activity and Flame Retardant Efficiency

Polymer Korea ◽  
2011 ◽  
Vol 35 (5) ◽  
pp. 431-437
Author(s):  
Sang Kyum Kim ◽  
In Soo Lee ◽  
Sang Hee Seo ◽  
Seong Ho Choi
Keyword(s):  
Antimicrobial Activity ◽  
Flame Retardant ◽  
Polymer Coating ◽  
Coating Solution

scholarly journals Antimicrobial activity of nano-sized silver colloids stabilized by nitrogen-containing polymers: the key influence of the polymer capping

RSC Advances ◽  
2018 ◽  
Vol 8 (20) ◽  
pp. 10873-10882 ◽  
Author(s):  
Carin C. S. Batista ◽  
Lindomar J. C. Albuquerque ◽  
Iris de Araujo ◽  
Brunno L. Albuquerque ◽  
Fernanda D. da Silva ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Polymer Coating ◽  
Chemical Nature ◽  
Silver Colloids ◽  
Kinetic Release ◽  
Polymer Capping ◽  
Polymer Stabilized

The antimicrobial activity of silver colloids depends on Ag+kinetic release that is governed by the chemical nature of the polymer coating in polymer-stabilized assemblies.

scholarly journals 1217. Predicting the Efficacy of an Antimicrobial Surface Coating Utilizing X-Ray Fluorescence Spectroscopy (XRF)

2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S437-S438
Author(s):  
Parham Asgari ◽  
Jie Fang ◽  
Val Price ◽  
Don DeClue ◽  
Gavri Grossman ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Stainless Steel ◽  
Fluorescence Spectroscopy ◽  
Polymer Coating ◽  
Test Organism ◽  
Polymer Coatings ◽  
Antimicrobial Efficacy ◽  
X Ray ◽  
Durable Polymer ◽  
The Relationship

Abstract Background Contaminated surfaces are a critical risk factor for transmitting infectious disease. Current disinfection products provide short-term antimicrobial action; however, these surfaces can be re-contaminated within hours after cleaning. To address this limitation, long-lasting antimicrobial polymer coatings have been developed as an adjunct to traditional disinfecting and cleaning protocols. Due to the micro-scale thickness and transparency of the coating, confirmation of its presence on surfaces is difficult with conventional methods; therefore, this study explores a novel approach to measuring durable polymer coatings on stainless steel coupons to validate their presence and relative antimicrobial activity. Methods In this study, we utilized a hand-held X-ray fluorescence spectroscopy (XRF) analyzer to quantitatively evaluate the amount of antimicrobial polymer coating deposited on stainless steel test surfaces. Stainless steel surfaces with amounts of coating ranging from 0.12 to 3.60 mg/in.2 were analyzed for their XRF profile using a hand-held spectrometer. Additionally, the relationship between the XRF spectra and antimicrobial activity was evaluated using a modified version of an existing sanitization protocol for hard surfaces using Staphylococcus epidermidis as the test organism. Results Comparison of the amount of antimicrobial polymer coating (in mg) and the XRF values (photon count) revealed a calibration curve with a high degree of linearity (R2 = 0.993) especially for surfaces that had lower mass (Figure 1). In addition, the relationship between XRF values and antimicrobial efficacy also were found to be well-correlated with a logarithmic trend (R2 = 0.9308) (Figure 2). Conclusion The observed trends between coating mass, XRF value and antimicrobial efficacy suggests that these analytical techniques are viable options for determining the presence of invisible antimicrobial polymer coatings. Additionally, laboratory-based calibration curves based on XRF values can be used to predict the level of antimicrobial activity of surfaces that have been treated with polymer coatings. These findings suggest that the use of a hand-held XRF spectrometer can be a rapid and cost-effective method for assessing the presence and efficacy of polymer coatings. Disclosures All authors: No reported disclosures.

scholarly journals Effect of PVA/PVAc Based Polymer Coating on Dust Reduction in Playground

2021 ◽  
Vol 11 (7) ◽  
pp. 3144
Author(s):  
In Kyu Jeon ◽  
Abdul Qudoos ◽  
Hyunseok Lee ◽  
Hong Gi Kim
Keyword(s):  
Polymer Coating ◽  
Soil Samples ◽  
Dust Exposure ◽  
Wind Effect ◽  
Specific Density ◽  
Coating Solution ◽  
Soil Particles ◽  
Permeability Characteristics ◽  
Dust Generation ◽  
Dust Reduction

Dust exposure is a serious threat to human health due to dermal contact, inhalation, and ingestion. Children are more vulnerable to dust than adults as a result of high rates of unintentional, or deliberate, ingestion and inhalation of dust. In this study, dust reduction in the playground due to coating of the soil particles with a PVA/PVAc-based solution was investigated. Soil particles were coated with varying amounts of coating solution and the samples were examined for various parameters e.g., specific density, moisture content, liquid and plastic limits, permeability, dust generation due to wind effect and human activity. The results demonstrated that coated soil samples showed improved permeability characteristics and reduced dust generation. These characteristics were improved by increased content of coating solution.

scholarly journals Emerging technologies for long-term antimicrobial device coatings: advantages and limitations

2017 ◽  
Vol 242 (8) ◽  
pp. 788-798 ◽  
Author(s):  
Erika L Cyphert ◽  
Horst A von Recum
Keyword(s):  
Antimicrobial Activity ◽  
Polymer Coating ◽  
Intrinsic Properties ◽  
Short Term ◽  
Device Failure ◽  
Advantages And Disadvantages ◽  
The Past ◽  
Drug Eluting ◽  
Implanted Device

Over the past 20 years, the field of antimicrobial medical device coatings has expanded nearly 30-fold with technologies shifting their focus from diffusion-only based (short-term antimicrobial eluting) coatings to long-term antimicrobial eluting and intrinsically antimicrobial functioning materials. A variety of emergent coatings have been developed with the goal of achieving long-term antimicrobial activity in order to mitigate the risk of implanted device failure. Specifically, the coatings can be grouped into two categories: those that use antibiotics in conjunction with a polymer coating and those that rely on the intrinsic properties of the material to kill or repel bacteria that come into contact with the surface. This review covers both long-term drug-eluting and non-eluting coatings and evaluates the inherent advantages and disadvantages of each type while providing an overview of variety applications that the coatings have been utilized in. Impact statement This work provides an overview, with advantages and limitations of the most recently developed antibacterial coating technologies, enabling other researchers in the field to more easily determine which technology is most advantageous for them to further develop and pursue.

scholarly journals Study on the Contact Angle, Adhesion Strength, and Antibacterial Activity of Polymer/Cement Composites for Waterproof Coating

2020 ◽  
pp. 1971-1977
Author(s):  
Sara M. Ibraheim ◽  
Seenaa I. Hussein
Keyword(s):  
Contact Angle ◽  
Antibacterial Activity ◽  
Adhesion Strength ◽  
Polymer Coating ◽  
Weight Ratio ◽  
Activity Analysis ◽  
Cement Composites ◽  
Adhesion Test ◽  
Coating Solution ◽  
Weight Percentage

     In the present work, polymeric composites were prepared for coating floors and swimming pools in dark colors. This was achieved through the use of a polymer coating solution added to fine cement with weight percentage (wt%) values of 5, 10, 15, 20, and 25 to obtain dark-colored (gray) composites. Mortar samples were prepared using the adhesion test. The contact angle and adhesion strength were studied for the prepared samples concerning the effect of changing the weight ratio of additive cement on water absorption. Also, the antibacterial activity was tested for the prepared coatings. The results showed that the contact angle increases with increasing the weight ratios of additive cement, which indicates that the prepared coating is not hydrophilic and water-impermeable. Besides, the adhesion was shown to increase with increasing the weight ratio of cement. According to the antibacterial activity analysis, it was found that the highest efficacy for killing Staphylococcus areus was observed at cement ratios of 5 and 15 wt%, whereas no activity was observed against Escherichia coli.

Preparation of Water-Repellent and Flame-Retardant Coating on Mulberry Paper

2013 ◽  
Vol 770 ◽  
pp. 100-103
Author(s):  
Sunisa Jindasuwan ◽  
Nattinee Sukmanee ◽  
Chanida Supanpong ◽  
On-uma Nimittrakoolchai ◽  
Sitthisuntorn Supothina
Keyword(s):  
Flame Retardant ◽  
Weight Ratio ◽  
Consumer Products ◽  
Water Repellent ◽  
Hydroxyl Groups ◽  
Monoammonium Phosphate ◽  
Water Contact ◽  
Coating Solution ◽  
Hydrophobic Substance ◽  
Mulberry Paper

A mulberry paper has been used to produce many consumer products such as lantern, card, packaging and decorating articles. Similar to other cellulosic materials, the mulberry paper bears abundant hydroxyl groups on its surface. Besides easily ignited, it can absorb water or humidity. To improve its thermal stability and to reduce deterioration caused by moisture adsorption, the mulberry paper was coated with a flame-retardant substance which was monoammonium phosphate (MAP) and a hydrophobic substance which was poly (methylhydrogen siloxane) (PMHS). The coating was conducted by immersing the mulberry paper in coating solution for 2 min followed by drying at 50 °C for 30 min. By varying a weight ratio of the PMHS and MAP, the PMHS:MAP weight ratio of 10:10 was found to be the optimum coating solution. The coated mulberry paper had good thermal property according to the thermogravimetric analysis. The uncoated mulberry paper showed residue of about 21% while the coated mulberry paper showed the increased residue of more than 50%. The burning test revealed that the coated mulberry paper was self-extinguished after removal of the ignition source while complete burning was observed on the uncoated paper. Moreover, it was water repellent with a water contact angle of 101.48 ± 5.81 degrees.

scholarly journals Combined effect of biopriming and polymer coating on chemical constituents of root exudation in chilli (Capsicum annuum L.) cv. K 2 seedlings

2016 ◽  
Vol 8 (4) ◽  
pp. 2141-2154 ◽  
Author(s):  
S. Sathya ◽  
S. Lakshmi ◽  
S. Nakkeeran
Keyword(s):  
Antimicrobial Activity ◽  
Volatile Compounds ◽  
Capsicum Annuum ◽  
Root Exudates ◽  
Polymer Coating ◽  
Chemical Constituents ◽  
Root Exudation ◽  
Hexadecanoic Acid ◽  
Capsicum Annuum L ◽  
Two Stages

A study was carried out to analyze the different volatile compounds in bioprimed chilli (Capsicum annuum L.) seedlings of 15 and 30 day old. A common compound found in two stages of chilli seedlings was hydroxylamine, dimethoxydimethyl silane, hexadecanoic acid, 15-methyl- methyl ester. Majority of the compounds in bacterized seedlings had antimicrobial activity. The results on GCMS analysis revealed that, root exudates collected from 15 and 30 days old bacterized seedlings with B. amyloliquefaciens VB7 and polymer coating released more number of volatile compounds (65 and 20 compounds respectively) than control (5 and 15 compounds respectively). The root exudates of 15 day old seedling released more volatile compounds (65 nos) than 30 days (20 nos) old seedling.

scholarly journals Encapsulation of Essential Oils within a Polymeric Liposomal Formulation for Enhancement of Antimicrobial Efficacy

2010 ◽  
Vol 5 (9) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Sandy F. van Vuuren ◽  
Lisa C. du Toit ◽  
Ashleigh Parry ◽  
Viness Pillay ◽  
Yahya E. Choonara
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oils ◽  
Polymer Coating ◽  
Chitosan Solution ◽  
Antimicrobial Efficacy ◽  
Polymeric Coating ◽  
Limiting Factor ◽  
Layer By Layer ◽  
Positive Effects ◽  
The Stability

Essential oils and their constituents are known to possess antimicrobial activity; however, their inherent volatility is a limiting factor. In order to exploit the antimicrobial efficacy of essential oils, encapsulation within polymeric liposomal systems was undertaken. The liposomes were subsequently polymer-coated in order to further enhance the stability of the formulations. Essential oils distilled from Artemisia Afra, Eucalyptus Globulus and Melaleuca alternifolia were encapsulated into diastearoyl phosphatidylcholine and diastearoyl phosphatidylethanolamine liposomes employing a reverse phase evaporation methodology. A polyelectrolyte coating was then applied via the layer-by-layer self-deposition technique. A batch of the liposomes was polymer-coated with a 0.15%w/v chitosan solution. Using the minimum inhibitory concentration assay, the liposome-encapsulated, unencapsulated and polymer-coated liposome-encapsulated essential oils were compared in order to observe whether the antimicrobial efficacy was improved with encapsulation and polymer coating. Fractional inhibitory concentrations (FICs) were calculated in order to determine the antimicrobial interactions amongst the lipoid components, polymer coating and essential oils (synergistic, additive, indifferent and antagonistic interactions). With the exception of A. afra, microbial growth was inhibited at lower concentrations for the encapsulated formulations in comparison with the non-encapsulated oils. Synergistic to additive interactions were noted for encapsulated E. globulus (ΣFIC values 0.25-0.45) and M. alternifolia (ΣFIC values 0.26-0.52) formulations. The addition of the polymer coating did not enhance antimicrobial activity, but owing to their positive effects on membrane stability, its presence is important as a means of extending the shelf life of these formulations. Additionally, the presence of the polymeric coating availed the essential oil at a slower rate. This investigation is a stepping stone towards the promotion of the antimicrobial use of essential oils. The added benefits are that essential oils not only provide effective antimicrobial efficacy, but also promote a “greener” consumerism. Within liposomes, they will enhance dermato-cosmetic properties and increase the marketing image of the final product.

scholarly journals Non-Solvent Influence of Hydrophobic Polymeric Layer Deposition on PVDF Hollow Fiber Membrane for CO2 Gas Absorption

Membranes ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 41
Author(s):  
Abdul Latif Ahmad ◽  
Amir Ikmal Hassan ◽  
Leo Choe Peng
Keyword(s):  
Contact Angle ◽  
Hollow Fiber ◽  
Polymer Coating ◽  
Hollow Fiber Membrane ◽  
Gas Absorption ◽  
Dense Layer ◽  
Fiber Membrane ◽  
Hydrophobic Membrane ◽  
Coating Solution ◽  
Modified Membrane

The implementation of hydrophobicity on membranes is becoming crucial in current membrane technological development, especially in membrane gas absorption (MGA). In order to prevent membrane wetting, a polypropylene (PP) dense layer coating was deposited on a commercial poly(vinylidene fluoride) (PVDF) hollow fiber membrane as a method of enhancing surface hydrophobicity. The weight concentration of PP pellets was varied from 10 mg mL−1 to 40 mg mL−1 and dissolved in xylene. A two-step dip coating was implemented where the PVDF membrane was immersed in a non-solvent followed by a polymer coating solution. The effects of the modified membrane with the non-solvent methyl ethyl ketone (MEK) and without the non–solvent was investigated over all weight concentrations of the coating solution. The SEM investigation found that the modified membrane surface transfiguration formed microspherulites that intensified as PP concentration increased with and without MEK. To understand the coating formation further, the solvent–non-solvent compatibility with the polymer was also discussed in this study. The membrane characterizations on the porosity, the contact angle, and the FTIR spectra were also conducted in determining the polymer coating properties. Hydrophobic membrane was achieved up to 119.85° contact angle and peak porosity of 87.62% using MEK as the non-solvent 40 mg mL−1 PP concentration. The objective of the current manuscript was to test the hydrophobicity and wetting degree of the coating layer. Hence, physical absorption via the membrane contactor using CO2 as the feed gas was carried out. The maximum CO2 flux of 3.33 × 10−4 mol m−2 s−1 was achieved by 25 mg modified membrane at a fixed absorbent flow rate of 100 mL min−1 while 40 mg modified membrane showed better overall flux stability.

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