Synthesis and characterization of titanium dioxide encapsulated poly(styrene-co-butyl acrylate-co-acrylic acid) nanocomposite latex

Ray, Nitesh Kumar; Gundabala, Venkat

doi:10.1016/j.porgcoat.2017.04.050

Cited by 12 publications

(6 citation statements)

References 33 publications

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“…In addition, owing to environmental regulations worldwide, significant efforts are being made to find suitable alternatives to traditional solvent coatings. , Waterborne latex coatings with no volatile organic components (VOC) have emerged as worthy alternatives . Broadly, water-based nanocomposites are designed to have antibacterial activity, photocatalytic activity, and electronic properties giving them wide-ranging applications . Specifically, waterborne latex coatings, which are suspensions of polymer particles in water containing surfactants, pigments, and other components, meet US and European regulatory standards for VOC and are rapidly competing with solvent-based counterparts …”

Section: Introductionmentioning

confidence: 99%

“…6 Broadly, waterbased nanocomposites are designed to have antibacterial activity, photocatalytic activity, and electronic properties giving them wide-ranging applications. 7 Specifically, waterborne latex coatings, which are suspensions of polymer particles in water containing surfactants, pigments, and other components, meet US and European regulatory standards for VOC and are rapidly competing with solvent-based counterparts. 8 A great majority of antimicrobial coatings are used as exterior and interior coatings, with a range of antimicrobial agents available for effective control of microbial growth.…”

Section: Introductionmentioning

confidence: 99%

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Film Formation of Iodinated Latex Dispersions and Its Role in Their Antimicrobial Activity

Sekar,

Tirumkudulu,

Gundabala

2024

Langmuir

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Waterborne coatings with intrinsic antibacterial attributes have attracted significant attention due to their potential in mitigating microbial contamination while simultaneously addressing the environmental drawbacks of their solvent-based counterparts. Typically, antimicrobial coatings are designed to resist and eliminate microbial threats, encompassing challenges such as biofilm formation, fungal contamination, and proliferation of black mold. Iodine, when solubilized using ethylene glycol and incorporated as a complex into waterborne latex dispersions, has shown remarkable antimicrobial activity. Here, we demonstrate the effect of the film formation process of these iodinated latex dispersions on their antimicrobial properties. The effect of iodine on the surface morphology and mechanical, adhesion, and antimicrobial properties of the generated films was investigated. Complete integration and uniform distribution of iodine in the films were confirmed through UV−vis spectrophotometry and a laser Raman imaging system (LRIS). In terms of properties, iodinated films showed improved mechanical strength and adhesion compared with blank films. Further, the presence of iodine rendered the films rougher, making them susceptible to bacterial adhesion, but interestingly provided enhanced antibiofilm activity. Moreover, thicker films had a lower surface roughness and reduced biofilm growth. These observations are elucidated through the complex interplay among film thickness, surface morphology, and iodine properties. The insights into the interlink between the film formation process and antimicrobial properties of iodinated latex dispersions will facilitate their enhanced application as sustainable alternatives to solvent-based coatings.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Film Formation of Iodinated Latex Dispersions and Its Role in Their Antimicrobial Activity

Sekar,

Tirumkudulu,

Gundabala

2024

Langmuir

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“…The specific heat capacity of water is large, which can better control the reaction temperature. On the other hand, the reaction is carried out simultaneously in a large amount of micelles with high polymerization efficiency (Wang et al , 2018; Ray and Gundabala, 2017). However, the traditional emulsion polymerization has the problem of emulsifier removal residue, which has a negative effect on the performance of the polymer.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of fluorine-containing soap-free acrylic emulsion

Gong

Shao

Chen

2020

PRT

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Purpose Fluorine materials have received the keen attention of many researchers because of their water repellency and low surface free energy. The purpose of this paper is to prepare fluorine-containing soap-free acrylic emulsion, which sodium allyoxypropyl hydroxypropyl sulfonate (COPS-1) and anionic emulsifier sodium a-alkenyl sulfonate (a-AOS) were combined as polymerizable emulsifier, and undecylenic acid (UA) and dodecafluoroheptyl methacrylate(DFMA) were introduced as functional monomer. Design/methodology/approach The fluorinated polyacrylate emulsion was successfully prepared by semi-continuous seed emulsion polymerization, wherein the main monomers were methyl methacrylate (MMA) and butyl methacrylate (BA), and the initiator was potassium persulfate (KPS). Sodium alloxypropyl sulfonate (COPS-1) and an anionic emulsifier sodium a-alkenyl sulfonate (a-AOS) were compounded as a polymerizable emulsifier. Besides, undecylenic acid (UA) and dodecafluoroheptyl methacrylate (DFMA) were introduced as the functional monomers. Findings The optimum recipe of preparing the modified latex is as follows: the amount of emulsifier was 4%, the ratio of emulsifier (COPS-1: AOS) was 3: 1, and the content of initiator was 0.6%. In this case, the conversion rate of acrylic polymer emulsion was high and the polymerization stability was good. When the amount of monomer UA was 2% and the amount of DFMA was 4%, the overall performance of the emulsion was the best. Originality/value The fluorine-containing soap-free acrylic emulsion is prepared via semi-continuous seeded emulsion polymerisation, which sodium allyoxypropyl hydroxypropyl sulfonate (COPS-1) and anionic emulsifier sodium a-alkenyl sulfonate (a-AOS) were combined as polymerizable emulsifier, and undecylenic acid (UA) and dodecafluoroheptyl methacrylate (DFMA) were introduced as functional monomer. There are two main innovations. One is that the fluorine-containing soap-free acrylic emulsion is prepared successfully. The other is that the undecylenic acid is introduced as functional monomer.

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“…They are amphiphilic molecules, which spontaneously associate in aqueous solution from a certain concentration. SLS is one of the most commonly used surfactants in polymeric microparticle synthesis reactions in miniemulsion processes, with concentrations ranging from 0.21 to 1.73% relative to the aqueous phase of the reaction medium [10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Activity of the Sodium Lauryl Sulphate Used as Surfactant in the Polymeric Encapsulation Processes

Fagundes

Carniel

Mazon

et al. 2020

MSF

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Miniemulsion polymerization process is a very versatile technique used for the polymeric encapsulation of the many essential oils. In this process some surfactant compounds are used to define the capsules characteristics, as an example the Sodium Lauryl Sulphate (SLS) that is one of the most used surfactants. But, after the miniemulsion polymerization synthesis the residual amount of SLS can manifest an antimicrobial action that can improve or to prejudice the final properties of the encapsulated products, depending of its percentual concentrations. In this sense, the objective of this work was to evaluate the antimicrobial activity of polycaprolactone (PCL) capsules synthesized with different residual concentrations of the SLS surfactant after the miniemulsion polymerization processes. The antimicrobial evaluations demonstrated from solid media diffusion test that the PCL microcapsules are microbiologically inactive for the bacteria Staphylococcus aureus and Escherichia coli when are synthetized with residual concentrations of SLS below 0.0125%. The minimum inhibitory concentration (MIC) of residual SLS for the bacteria Staphylococcus aureus is 0.0146% and for the bacteria Escherichia coli the complete bacterial inhibition not was detected at the maximum residual concentration studied of 0.1167%.

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Synthesis and characterization of titanium dioxide encapsulated poly(styrene-co-butyl acrylate-co-acrylic acid) nanocomposite latex

Cited by 12 publications

References 33 publications

Film Formation of Iodinated Latex Dispersions and Its Role in Their Antimicrobial Activity

Film Formation of Iodinated Latex Dispersions and Its Role in Their Antimicrobial Activity

Preparation and characterization of fluorine-containing soap-free acrylic emulsion

Antimicrobial Activity of the Sodium Lauryl Sulphate Used as Surfactant in the Polymeric Encapsulation Processes

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