Antibacterial Polyethylene/clay Nanocomposites Using Chlorhexidine as Organic Modifier

Holešová, Sylva; Samlíková, Magda; Ritz, Michal; Pazdziora, Erich

doi:10.1016/j.matpr.2015.04.031

Cited by 7 publications

(6 citation statements)

References 17 publications

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“…The characteristic bands of polyethylene, 2918, 2849, 1469, 1463, 731 and 720 cm -1 (CH 2 angular deformations) appear in all spectra [28,29] . Studies [30] with nanocomposites using modified vermiculite with Zn 2+ particles in the HDPE matrix also observed the same characteristic bands of pure HDPE.…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)supporting

confidence: 53%

“…However, the presence of bands in the range of 3620 cm -1 indicates the presence of O-H vibrations for Al-OH and Si-OH, and in approximately 1042 cm -1 the absorption of the Si-O from to Cloisite 20A [32] . In studies with nanocomposites using modified vermiculite with Zn 2+ particles in HDPE matrix, bands ranging from 1007 to 1041 cm -1 were observed, corresponding to the stretching of Si-O of vermiculite, as well as an increase in the intensity of these bands with an increasing amount (3, 6 and 10% by weight) of the modified clay [30] .…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 99%

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Development and characterization of green polyethylene/clay/antimicrobial additive nanocomposites

2022

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In this work, nanocomposites were developed and evaluated using high-density bio polyethylene (BPEAD)/Cloisite 20A (3 and 6%)/commercial antimicrobial additive (0,5 and 1%) containing 1% of zinc pyrithione dispersed in vinyl acetate (EVA). The samples were prepared in a single screw extruder using the melt intercalation technique and then by flat extrusion to obtain the films. X-ray diffraction (XRD) showed an increase in basal spacing and exfoliation of the structure of some films. The Fourier Transform Infrared Spectroscopy (FTIR) analysis illustrated the main functional groups for BHDPE and EVA. Thermal analysis indicated that BHDPE degradation did not change with organoclay addition, but crystallinity increased. The mechanical properties showed an increase in the elastic modulus and a decrease in maximum tensile strength. This work contributes to the development and improvement of the natural properties of BHDPE in order to enlarge its applications.

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Section: Fourier Transform Infrared Spectroscopy (Ftir)supporting

confidence: 53%

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 99%

Development and characterization of green polyethylene/clay/antimicrobial additive nanocomposites

2022

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“…00-011-0834. The filler MCA showed a diffused basal reflection of montmorillonite intercalated with chlorhexidine diacetate at d = 1.55 nm [ 12 ] corresponding to the lateral alignment of large CA molecules ( Figure 1 B(b)). After decoration with CDH, the MCAH pattern showed in both phases a basal reflection of intercalated montmorillonite at d = 1.55 nm and basal reflections of CDH at d = 0.334 and 0.28 nm, as shown in Figure 1 B(d).…”

Section: Resultsmentioning

confidence: 99%

“…The major advantage of clays is the low cost of the abundant mineral, the ease of processing, and their nontoxicity for wide range of biological systems. There are several studies targeting the preparation of antimicrobial polymer composites using modified clay minerals [ 12 , 13 , 14 ]. The montmorillonite and vermiculites are the most commonly used 2:1 layered phyllosilicates in many industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial and Biocompatible Polyethylene Composites with Hybrid Clay Nanofillers

Klecandová,

Nakonieczny,

Reli

et al. 2023

Materials

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Low-density polyethylene is one of the basic polymers used in medicine for a variety of purposes; so, the relevant improvements in functional properties are discussed here, making it safer to use as devices or implants during surgery or injury. The objective of the laboratory-prepared material was to study the antimicrobial and biocompatible properties of low-density polyethylene composites with 3 wt. % hybrid nanoclay filler. We found that the antimicrobial activity was mainly related to the filler, i.e., the hybrid type, where inorganic clay minerals, vermiculite or montmorillonite, were intercalated with organic chlorhexidine diacetate and subsequently decorated with Ca-deficient hydroxyapatite. After fusion of the hybrid nanofiller with polyethylene, intense exfoliation of the clay layers occurred. This phenomenon was confirmed by the analysis of the X-ray diffraction patterns of the composite, where the original basal peak of the clays decreased or completely disappeared, and the optimal distribution of the filler was observed using the transmission mode of light microscopy. Functional property testing showed that the composites have good antibacterial activity against Staphylococcus aureus, and the biocompatibility prediction demonstrated the formation of Ca- and P-containing particles through an in vitro experiment, thus applicable for medical use.

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“…Due to its hydrophilic nature, metal ions are usually exchanged with quaternary ammonium intercalats, in order to render nanoclay hydrophobic and capable to be well dispersed into polymer matrix 16,17) . It is well known that polymer-clay nanocomposites might present remarkable performance regarding their mechanical, physicochemical, thermal and antibacterial properties [18][19][20][21][22][23][24][25][26] . Recently, commercially available clay nanoparticles were utilized in composite resins exhibiting encouraging results concerning their polymerization shrinkage reduction and mechanical properties improvement [27][28][29] .…”

Section: Introductionmentioning

confidence: 99%

Pit and fissure nanocomposite sealants reinforced with organically modified montmorillonite: A study of their mechanical properties, surface roughness and color stability

2020

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The aim of the present work was to investigate the effect of the different organically modified nanoclays on clinically significant properties of new synthesized dental pit and fissure nanocomposite sealants. Their morphological characteristics were examined by means of X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM). A universal testing machine was used to conduct the flexural and compression tests. Surface roughness measurements were taken by using a 3D-optical profilometer. Color changes after aging in black tea were determined by recording UV-visible spectra. XRD plots depicted possible structures governed by intercalated regions along with some "tactoids" nanoparticles. SEM images revealed a better dispersion for the methacrylated clay nanofiller. Flexural modulus and microhardness were found to be higher for sealants reinforced with such polymerizable nanoclays. These specific nanocomposites yielded smoother surfaces, as well as clinically accepted color changes even after 1 week aging in black tea.

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Antibacterial Polyethylene/clay Nanocomposites Using Chlorhexidine as Organic Modifier

Cited by 7 publications

References 17 publications

Development and characterization of green polyethylene/clay/antimicrobial additive nanocomposites

Development and characterization of green polyethylene/clay/antimicrobial additive nanocomposites

Antibacterial and Biocompatible Polyethylene Composites with Hybrid Clay Nanofillers

Pit and fissure nanocomposite sealants reinforced with organically modified montmorillonite: A study of their mechanical properties, surface roughness and color stability

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