Fibrous antibacterial coatings from self-assembled silver-binding elastins

RSC Advances ◽  
2015 ◽  
Vol 5 (107) ◽  
pp. 88027-88031 ◽  
Author(s):  
Lu Yan ◽  
Truong T. H. Anh ◽  
Tee Shang-You ◽  
Eileen Fong
Keyword(s):  
Antibacterial Properties ◽  
Green Method ◽  
Antibacterial Coatings ◽  
Self Assembled

A simple and green method to prepare silver coatings from self-assembled elastins with excellent antibacterial properties.

A green method to the preparation of the silver-loaded diatomite with enhanced antibacterial properties

2019 ◽  
Vol 74 (3) ◽  
pp. 859-866 ◽  
Author(s):  
JiXi Chen ◽  
JunQiu Zhu ◽  
ShuiYuan Luo ◽  
XiaoXiao Zhong
Keyword(s):  
Antibacterial Properties ◽  
Green Method

scholarly journals Electrophoretic Deposition of Copper(II)–Chitosan Complexes for Antibacterial Coatings

2020 ◽  
Vol 21 (7) ◽  
pp. 2637 ◽  
Author(s):  
Muhammad Asim Akhtar ◽  
Kanwal Ilyas ◽  
Ivo Dlouhý ◽  
Filip Siska ◽  
Aldo R. Boccaccini
Keyword(s):  
Electrophoretic Deposition ◽  
Mechanical Stability ◽  
Metallic Copper ◽  
Antibacterial Properties ◽  
Threshold Concentration ◽  
X Ray Diffraction ◽  
X Ray ◽  
Antibacterial Coatings ◽  
Elemental Analyses ◽  
The Stability

Bacterial infection associated with medical implants is a major threat to healthcare. This work reports the fabrication of Copper(II)–Chitosan (Cu(II)–CS) complex coatings deposited by electrophoretic deposition (EPD) as potential antibacterial candidate to combat microorganisms to reduce implant related infections. The successful deposition of Cu(II)–CS complex coatings on stainless steel was confirmed by physicochemical characterizations. Morphological and elemental analyses by scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) spectroscopy verified the uniform distribution of copper in the Chitosan (CS) matrix. Moreover, homogeneous coatings without precipitation of metallic copper were confirmed by X-ray diffraction (XRD) spectroscopy and SEM micrographs. Controlled swelling behavior depicted the chelation of copper with polysaccharide chains that is key to the stability of Cu(II)–CS coatings. All investigated systems exhibited stable degradation rate in phosphate buffered saline (PBS)–lysozyme solution within seven days of incubation. The coatings presented higher mechanical properties with the increase in Cu(II) concentration. The crack-free coatings showed mildly hydrophobic behavior. Antibacterial assays were performed using both Gram-positive and Gram-negative bacteria. Outstanding antibacterial properties of the coatings were confirmed. After 24 h of incubation, cell studies of coatings confirms that up to a certain threshold concentration of Cu(II) were not cytotoxic to human osteoblast-like cells. Overall, our results show that uniform and homogeneous Cu(II)–CS coatings with good antibacterial and enhanced mechanical stability could be successfully deposited by EPD. Such antibiotic-free antibacterial coatings are potential candidates for biomedical implants.

scholarly journals Green Synthesis: Nanoparticles and Nanofibres Based on Tree Gums for Environmental Applications

2016 ◽  
Vol 23 (4) ◽  
pp. 533-557 ◽  
Author(s):  
Vinod Vellora Thekkae Padil ◽  
Stanisław Wacławek ◽  
Miroslav Černík
Keyword(s):  
Toxic Metals ◽  
Antibacterial Properties ◽  
Industrial Effluents ◽  
Green Method ◽  
Adsorptive Removal ◽  
Food Biotechnology ◽  
Plasma Treatments ◽  
Aqueous Environments ◽  
Potential Applications ◽  
Nanofibrous Membranes

AbstractThe recent advances and potential applications of nanoparticles and nanofibres for energy, water, food, biotechnology, the environment, and medicine have immensely conversed. The present review describes a ‘green’ method for the synthesis and stabilization of nanoparticles and ‘green electrospinning’ both using tree gums (arabic, tragacanth, karaya and kondagogu). Furthermore, this review focuses on the impending applications of both gum stabilized nanoparticles and functionalized membranes in remediation of toxic metals, radioactive effluents, and the adsorptive removal of nanoparticulates from aqueous environments as well as from industrial effluents. Besides, the antibacterial properties of gum derivatives, gum stabilized nanoparticles, and functionalized electrospun nanofibrous membranes will also be highlighted. The functionalities of nanofibrous membranes that can be enhanced by various plasma treatments (oxygen and methane, respectively) will also be emphasized.

scholarly journals The Effects of Silver Nanoparticles Compositions on the Mechanical, Physiochemical, Antibacterial, and Morphology Properties of Sugar Palm Starch Biocomposites for Antibacterial Coating

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2605 ◽  
Author(s):  
A. Rozilah ◽  
C. N. Aiza Jaafar ◽  
S. M. Sapuan ◽  
I. Zainol ◽  
R. A. Ilyas
Keyword(s):  
Silver Nanoparticles ◽  
Composite Films ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Microscopic Analysis ◽  
Decomposition Temperature ◽  
Gravimetric Analysis ◽  
Ftir Analysis ◽  
Antibacterial Coatings ◽  
Biocomposite Films

Antibacterial sugar palm starch biopolymer composite films were developed and derived from renewable sources and inorganic silver nanoparticles (AgNPs) as main ingredients for antibacterial coatings. The composite films were produced by solution casting method and the mechanical and physicochemical properties were determined by tensile test, Fourier Transform Infrared (FTIR) analysis, thermal gravimetric analysis (TGA), antibacterial screening test and field emission scanning electron microscopy (FESEM) images. It was found that mechanical and antibacterial properties of biocomposite films were improved after the addition of AgNPs compared with the film without active metals. The weakness of neat biocomposite films was improved by incorporating inorganic AgNPs as a nanofiller in the films’ matrix to avoid bacterial growth. The results showed that the tensile strength ranged between 8 kPa and 408 kPa and the elasticity modulus was between 5.72 kPa and 9.86 kPa. The addition of AgNPs in FTIR analysis decreased the transmittance value, caused small changes in the chemical structure, caused small differences in the intensity peaks, and produced longer wavelengths. These active films increased the degradation weight and decomposition temperature due to the more heat-stable AgNPs. Meanwhile, the average inhibited areas measured were between 7.66 and 7.83 mm (Escherichia coli), 7.5 and 8.0 mm (Salmonella cholerasuis), and 0.1 and 0.5 mm for Staphylococcus aureus. From the microscopic analysis, it was observed that the average size of all microbes for 1 wt% and 4 wt% AgNPs ranged from 0.57 to 2.90 mm. Overall, 3 wt% AgNP nanofiller was found to be the best composition that fulfilled all the mechanical properties and had better antimicrobial properties. Thus, the development of an organic-inorganic hybrid of antibacterial biopolymer composite films is suitable for antibacterial coatings.

Antibacterial Properties Enhancement of Layer-by-Layer Self-Assembled Nanofiltration Membranes

2018 ◽  
Vol 18 (7) ◽  
pp. 4524-4533 ◽  
Author(s):  
Zhonghua Huang ◽  
Mengkun Li ◽  
Na Li ◽  
Xinyuan Tang ◽  
Zhiyu Ouyang
Keyword(s):  
Antibacterial Properties ◽  
Layer By Layer ◽  
Nanofiltration Membranes ◽  
Self Assembled

scholarly journals Effects of Polydopamine Microspheres Loaded with Silver Nanoparticles on Lolium multiflorum: Bigger Size, Less Toxic

Toxics ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 151
Author(s):  
Xinrui Wang ◽  
Hongyong Luo ◽  
Weihua Zheng ◽  
Xinling Wang ◽  
Haijun Xiao ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Shoot Growth ◽  
Antibacterial Property ◽  
Lolium Multiflorum ◽  
Rapid Development ◽  
Antibacterial Properties ◽  
Silver Ions ◽  
Green Method ◽  
Adverse Impacts ◽  
Root And Shoot Growth

The rapid development of nanotechnology and its widespread use have given rise to serious concerns over the potential adverse impacts of nanomaterials on the Earth’s ecosystems. Among all the nanomaterials, silver nanoparticles (AgNPs) are one of the most extensively used nanomaterials due to their excellent antibacterial property. However, the toxic mechanism of AgNPs in nature is still unclear. One of the questions under debate is whether the toxicity is associated with the size of AgNPs or the silver ions released from AgNPs. In our previous study, a sub-micron hybrid sphere system with polydopamine-stabilized AgNPs (Ag@PDS) was synthesized through a facile and green method, exhibiting superior antibacterial properties. The current study aims to explore the unique toxicity profile of this hybrid sphere system by studying its effect on germination and early growth of Lolium multiflorum, with AgNO3 and 15 nm AgNPs as a comparison. The results showed the seed germination was insensitive/less sensitive to all three reagents; however, vegetative growth was more sensitive. Specifically, when the Ag concentration was lower than 40 mg/L, Ag@PDS almost had no adverse effects on the root and shoot growth of Lolium multiflorum seeds. By contrast, when treated with AgNO3 at a lower Ag concentration of 5 mg/L, the plant growth was inhibited significantly, and was reduced more in the case of AgNP treatment at the same Ag concentration. As the exposures of Ag@PDS, AgNO3, and AgNPs increased, so did the Ag content in the root and shoot. In general, Ag@PDS was proven to be a potential useful hybrid material that retains antibacterial property with light phytotoxicity.

scholarly journals Bioactive Coatings on Titanium: A Review on Hydroxylation, Self-Assembled Monolayers (SAMs) and Surface Modification Strategies

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 165
Author(s):  
Julia Sánchez-Bodón ◽  
Jon Andrade del Olmo ◽  
Jose María Alonso ◽  
Isabel Moreno-Benítez ◽  
José Luis Vilas-Vilela ◽  
...  
Keyword(s):  
Surface Modification ◽  
Active Agent ◽  
Antibacterial Properties ◽  
Self Assembled Monolayers ◽  
Special Focus ◽  
Bioactive Coatings ◽  
Long Term Stability ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Surface Hydroxylation

Titanium (Ti) and its alloys have been demonstrated over the last decades to play an important role as inert materials in the field of orthopedic and dental implants. Nevertheless, with the widespread use of Ti, implant-associated rejection issues have arisen. To overcome these problems, antibacterial properties, fast and adequate osseointegration and long-term stability are essential features. Indeed, surface modification is currently presented as a versatile strategy for developing Ti coatings with all these challenging requirements and achieve a successful performance of the implant. Numerous approaches have been investigated to obtain stable and well-organized Ti coatings that promote the tailoring of surface chemical functionalization regardless of the geometry and shape of the implant. However, among all the approaches available in the literature to functionalize the Ti surface, a promising strategy is the combination of surface pre-activation treatments typically followed by the development of intermediate anchoring layers (self-assembled monolayers, SAMs) that serve as the supporting linkage of a final active layer. Therefore, this paper aims to review the latest approaches in the biomedical area to obtain bioactive coatings onto Ti surfaces with a special focus on (i) the most employed methods for Ti surface hydroxylation, (ii) SAMs-mediated active coatings development, and (iii) the latest advances in active agent immobilization and polymeric coatings for controlled release on Ti surfaces.

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