Polymeric nanoparticles-based multi-functional coatings on NiTi alloy with nickel ion release control, cytocompatibility, and antibacterial performance

Nickel ion release from NiTi shape memory alloy is an issue for biomedical applications. This study was planned to study the effect of C[Formula: see text] implantation on nickel ion release and affinity of calcium phosphate precipitation on NiTi alloy. Four annealed samples are chosen for the present study; three samples with oxidation layer and the fourth without oxidation layer. X-ray diffraction (XRD) spectra reveal amorphization with ion implantation. Proton-induced X-ray emission (PIXE) result shows insignificant increase in Ni release in simulated body fluid (SBF) and calcium phosphate precipitation up to [Formula: see text][Formula: see text]ions/cm2. Then Nickel contents show a sharp increase for greater ion doses. Corrosion potential decreases by increasing the dose but all the samples passivate after the same interval of time and at the same level of [Formula: see text] in ringer lactate solution. Hardness of samples initially increases at greater rate (up to [Formula: see text][Formula: see text]ions/cm[Formula: see text] and then increases with lesser rate. It is found that [Formula: see text][Formula: see text]ions/cm2 ([Formula: see text] is a safer limit of implantation on NiTi alloy, this limit gives us lesser ion release, better hardness and reasonable hydroxyapatite incubation affinity.

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Bioactive Plasma Coatings on Orthodontic Brackets: In Vitro Metal Ion Release and Cytotoxicity

Coatings ◽

10.3390/coatings11070857 ◽

2021 ◽

Vol 11 (7) ◽

pp. 857

Author(s):

Lasni Samalka Kumarasinghe ◽

Neethu Ninan ◽

Panthihage Ruvini Lakshika Dabare ◽

Alex Cavallaro ◽

Esma J. Doğramacı ◽

...

Keyword(s):

Metal Ion ◽

Prolonged Exposure ◽

Orthodontic Brackets ◽

Plasma Polymer ◽

Functional Coatings ◽

Key Factors ◽

Ion Release ◽

Metal Ion Release ◽

Surface Functionalisation

The metal ion release characteristics and biocompatibility of meta-based materials are key factors that influence their use in orthodontics. Although stainless steel-based alloys have gained much interest and use due to their mechanical properties and cost, they are prone to localised attack after prolonged exposure to the hostile oral environment. Metal ions may induce cellular toxicity at high dosages. To circumvent these issues, orthodontic brackets were coated with a functional nano-thin layer of plasma polymer and further immobilised with enantiomers of tryptophan. Analysis of the physicochemical properties confirmed the presence of functional coatings on the surface of the brackets. The quantification of metal ion release using mass spectrometry proved that plasma functionalisation could minimise metal ion release from orthodontic brackets. Furthermore, the biocompatibility of the brackets has been improved after functionalisation. These findings demonstrate that plasma polymer facilitated surface functionalisation of orthodontic brackets is a promising approach to reducing metal toxicity without impacting their bulk properties.

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Green Synthesis and Incorporation of Sericin Silver Nanoclusters into Electrospun Ultrafine Cellulose Acetate Fibers for Anti-Bacterial Applications

Polymers ◽

10.3390/polym13091411 ◽

2021 ◽

Vol 13 (9) ◽

pp. 1411

Author(s):

Mujahid Mehdi ◽

Huihui Qiu ◽

Bing Dai ◽

Raja Fahad Qureshi ◽

Sadam Hussain ◽

...

Keyword(s):

Electron Microscopy ◽

Green Synthesis ◽

Cellulose Acetate ◽

Antibacterial Properties ◽

Vital Role ◽

Silver Nanoclusters ◽

Composite Fibers ◽

E Coli ◽

Antibacterial Performance ◽

Field Emission Electron Microscopy

Fiber based antibacterial materials have gained an enormous attraction for the researchers in these days. In this study, a novel Sericin Encapsulated Silver Nanoclusters (sericin-AgNCs) were synthesized through single pot and green synthesis route. Subsequently these sericin-AgNCs were incorporated into ultrafine electrospun cellulose acetate (CA) fibers for assessing the antibacterial performance. The physicochemical properties of sericin-AgNCs/CA composite fibers were investigated by transmission electron microscopy (TEM), field emission electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR) and wide X-ray diffraction (XRD). The antibacterial properties of sericin-AgNCs/CA composite fibers against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) were systematically evaluated. The results showed that sericin-AgNCs incorporated in ultrafine CA fibers have played a vital role for antibacterial activity. An amount of 0.17 mg/mL sericin-AgNCs to CA fibers showed more than 90% results and elevated upto >99.9% with 1.7 mg/mL of sericin-AgNCs against E. coli. The study indicated that sericin-AgNCs/CA composite confirms an enhanced antibacterial efficiency, which could be used as a promising antibacterial product.

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Xanthate-modified nanoTiO2 as a novel vulcanization accelerator enhancing mechanical and antibacterial properties of natural rubber

Nanotechnology Reviews ◽

10.1515/ntrev-2021-0038 ◽

2021 ◽

Vol 10 (1) ◽

pp. 478-487

Author(s):

Yu Liu ◽

Heliang Wang ◽

Xiwei Guo ◽

Mingyuan Yi ◽

Lihong Wan ◽

...

Keyword(s):

Titanium Dioxide ◽

Natural Rubber ◽

High Performance ◽

Antibacterial Properties ◽

Ceric Ammonium Nitrate ◽

Rubber Matrix ◽

Aging Effects ◽

Antibacterial Performance ◽

First Time ◽

Vulcanization Accelerator

Abstract With the emerging of sustainability, the fabrication of effective and eco-friendly agents for rubber industry has attracted extensive attention. In this study, a novel and nontoxic titanium dioxide-based vulcanization accelerator (xanthate-modified nanotitanium dioxide (TDSX)) with excellent antibacterial performance, for the first time, was synthesized under the catalyst of ceric ammonium nitrate. Notably, the thermal stability of xanthate was greatly enhanced after being grafted on titanium dioxide (TiO2) nanoparticles, in which the activation energy was increased from 6.4 to 92.5 kJ/mol, enabling the obtained TDSX with multiple functions, mainly consisting of fabulous vulcanization-promoting effects, reinforcing effects, antibacterial properties, and anti-ultraviolet aging effects for natural rubber (NR). Simultaneously, the TDSX can be effectively and uniformly dispersed in the rubber matrix along with the developed interface interaction between TDSX particles and rubber matrix. Compared to the traditional accelerators 2-mercaptobenzothiazole (M) system, the tensile strength and the tearing strength of NR/TDSX was improved by 26.3 and 40.4%, respectively. Potentially, our work for preparing green vulcanization accelerator can provide a new design strategy for multifunctional high performance elastomer materials.

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Study on the Antibacterial Performance of the Antibacterial Shutter Blades

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.815.333 ◽

2013 ◽

Vol 815 ◽

pp. 333-338

Author(s):

Ming Li Liu ◽

Chun Feng Li ◽

Yun Long Wang ◽

Kai Lu ◽

Jiu Yin Pang ◽

...

Keyword(s):

Antibacterial Agent ◽

Antibacterial Agents ◽

Drug Loading ◽

Antibacterial Properties ◽

Water Soluble ◽

Single Factor ◽

Antibacterial Performance ◽

Loading Amount ◽

Single Factor Experiment ◽

Impregnation Solution

This study used Ag-embedded nanoTiO2, xylan and water-soluble Chitosan as antibacterial agents, respectively prepared shutter blades through the treating solution of the different concentration and the different drug loading amount of the poplar veneer. Through a single factor experiment, this paper analyzes that the different antibacterial agent, concentration of antibacterial agent and the drug loading amount have an effect on the antibacterial properties of the shutter blades. The results show that the order of antibacterial performance of the shutter blades impregnated antibacterial agents is the Ag-embedded nanoTiO2, Chitosan, Xylan. Comprehensiv-ely thought the antibacterial properties and economic index, the optimal concentration of the Ag-embedded nanoTiO2 impregnation solution is 1%.

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Influence of nickel ion release on leukocyte activation: a study with coated and non-coated NiTi shape memory alloys

Materials Science and Engineering A ◽

10.1016/j.msea.2007.02.160 ◽

2008 ◽

Vol 481-482 ◽

pp. 612-615 ◽

Cited By ~ 8

Author(s):

S.A. Esenwein ◽

D. Bogdanski ◽

T. Habijan ◽

M. Pohl ◽

M. Epple ◽

...

Keyword(s):

Shape Memory Alloys ◽

Shape Memory ◽

Leukocyte Activation ◽

Ion Release ◽

Nickel Ion ◽

Niti Shape Memory Alloys

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Preparation, characterization, antibacterial properties and hydrophobic evaluation of SiO2/Ag nanosol coated cotton/linen fabric

Journal of the Textile Institute ◽

10.1080/00405000.2019.1682758 ◽

2020 ◽

Vol 111 (1) ◽

pp. 75-83 ◽

Cited By ~ 1

Author(s):

Hongbin Li ◽

Yan Zhuang ◽

Hao Li ◽

Karen Chávez Bracamontes ◽

Dawei Wang ◽

...

Keyword(s):

Zeta Potential ◽

Sol Gel ◽

Antibacterial Properties ◽

Air Permeability ◽

Hydrophobic Property ◽

Textile Materials ◽

Antibacterial Performance ◽

Ag Particles ◽

Linen Fabric ◽

Coated Cotton

Surface modification is an important element of textile manufacturing. The SiO2/Ag sol–gel was coated on the cotton/linen fabric by a simple two-dipping-two-rolling coating machine. SEM, Zeta-potential, (ATR)-FTIR and XRD, physical properties, water-droplet adsorption, antibacterial performance and water-resisting property have been adopted as the characterization techniques. The Zeta-potential showed that the nano-Ag particles affected the size of SiO2 nanoparticles. The results showed that antibacterial activity and hydrophobic property of cotton/linen fabric increased with the increasing concentration of the AgNO3. Air permeability was not decreased considerably, whereas tensile strength was increased significantly after coating twice. The SiO2/Ag coating cotton/linen fabric had an excellent antibacterial performance. Our results demonstrate that this SiO2/Ag coated cotton/linen fabric is a step towards better hydrophobic performance of textile materials.

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Bioinspired Superhydrophobic Ni–Ti Archwires with Resistance to Bacterial Adhesion and Nickel Ion Release

Advanced Materials Interfaces ◽

10.1002/admi.201801569 ◽

2019 ◽

Vol 6 (7) ◽

pp. 1801569 ◽

Cited By ~ 7

Author(s):

Ruoxi Liu ◽

Xi Liu ◽

Jie Zhou ◽

Qiong Nie ◽

Jingxin Meng ◽

...

Keyword(s):

Bacterial Adhesion ◽

Ion Release ◽

Nickel Ion

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New Bactericide Orthodonthic Archwire: NiTi with Silver Nanoparticles

Metals ◽

10.3390/met10060702 ◽

2020 ◽

Vol 10 (6) ◽

pp. 702

Author(s):

F. Javier Gil ◽

Eduardo Espinar-Escalona ◽

Nuria Clusellas ◽

Javier Fernandez-Bozal ◽

Montserrat Artes-Ribas ◽

...

Keyword(s):

Silver Nanoparticles ◽

Martensitic Transformation ◽

Inductively Coupled Plasma ◽

Artificial Saliva ◽

Bacterial Strains ◽

Ion Release ◽

Critical Temperatures ◽

Nickel Ion ◽

Bacteria Culture ◽

Nanoparticles Of Silver

A potential new bactericide treatment for NiTi orthodontic archwires based in the electrodeposition of silver nanoparticles on the surface was studied. Twenty-five archwires were treated by electrodeposition, obtaining nanoparticles of silver embedded on the archwire surface. These were evaluated in order to investigate the possible changes on the superelastic characteristics (critical temperatures and stresses), the nickel ion release, and the bacteria culture behavior. The chemical composition was analyzed by Energy Dispersive X-Ray Spectroscopy-microanalysis; the singular temperatures of the martensitic transformation were obtained by a flow calorimeter. Induced martensitic transformation stresses were obtained by mechanical testing apparatus. Nickel ion release was analyzed by inductively coupled plasma-mass spectrometry (ICP-MS) equipment using artificial saliva solution at 37 °C. Bacterial tests were studied with the most used oral bacterial strains: Streptococcus sanguinis and Lactobacillus salivarius. NiTi samples were immersed in bacterial suspensions for 2 h at 37 °C. Adhered bacteria were separated and seeded on agar plates: Tood-Hewitt (TH) and Man-Rogosa-Sharpe (MRS) for S. sanguinis and for L.salivarius, respectively. These were then incubated at 37 °C for 1 day and the colonies were analyzed. The results showed that the transformation temperatures and the critical stresses have not statistically significant differences. Likewise, nickel ion release at different immersion times in saliva at 37 °C does not present changes between the original and treated with silver nanoparticles archwires. Bacteria culture results showed that the reduction of the bacteria due to the presence to the nanoparticles of silver is higher than 90%. Consequently, the new treatment with nanoparticles of silver could be a good candidate as bactericidic orthodontic archwire.

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Antibacterial properties and in vivo studies of tannic acid-stabilized silver–halloysite nanomaterials

Clay Minerals ◽

10.1180/clm.2020.17 ◽

2020 ◽

Vol 55 (2) ◽

pp. 112-119

Author(s):

Anna Stavitskaya ◽

Christina Shakhbazova ◽

Yulia Cherednichenko ◽

Läysän Nigamatzyanova ◽

Gölnur Fakhrullina ◽

...

Keyword(s):

Tannic Acid ◽

Antibacterial Properties ◽

Halloysite Nanotubes ◽

In Vivo Studies ◽

Negative Effects ◽

Antibacterial Performance ◽

Synthesis Strategy ◽

Clay Nanotubes

AbstractTannic acid-stabilized silver nanoparticles were synthesized in situ on halloysite clay nanotubes. The synthesis strategy included simple steps of tannic acid adsorption on clay nanotubes and further particle formation from silver salt solution. Pristine halloysite nanotubes as well as amino-modified clays were used for silver stabilization in water or ethanol. The materials were tested for antibacterial performance using three different methods. All of the materials produced showed antimicrobial activity. The pristine halloysite-based material with ~5 nm particles produced using ethanol as the solvent and tannic acid as the reducing agent showed the greatest antibacterial activity against Serratia marcescens. The materials were tested in vivo on Caenorhabditis elegans nematodes to ensure their safety, and they showed no negative effects on nematode growth and life expectancy.

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