To develop novel polypropylene composite materials with antimicrobial activity by adding different types of copper nanoparticles.Copper metal (CuP) and oxide nanoparticles (CuOP) were embedded in a (PP) matrix. These composites present strong behaviour against E. coli that depends on the contact time between sample bacteria. After just 4 h contact, these samples are able to kill more than 95% CuOP fillers much effective eliminating bacteria CuP fillers, showing property further type...

Scaffolds based on bioconjugated hydrogels are attractive for tissue engineering because they can partly mimic human characteristics. For example, further increase their bioactivity with cells. However, most of the present problems related to processability, consequently limiting use in 3D printing produce tailor-made scaffolds. The goal this work is develop hydrogel nanocomposite inks printed scaffold fabrication through a micro-extrusion process having improved both biocompatibility and...

Metal doping of bioactive glasses based on ternary 60SiO2-36CaO-4P2O5 (58S) and quaternary 60SiO2-25CaO-11Na2O-4P2O5 (NaBG) mol% compositions synthesized using a sol-gel process was analyzed. In particular, the effect incorporating 1, 5 10 CuO ZnO (replacing equivalent quantities CaO) texture, in vitro bioactivity, cytocompatibility these materials evaluated. Our results showed that addition metal ions can modulate textural property matrix its crystal structure. Regarding after soaking...

Novel antimicrobial 3D-printed alginate/bacterial-cellulose hydrogels with in situ-synthesized copper nanostructures were developed having improved printability. Prior to 3D printing, two methods tested for the development of alginate hydrogels: (a) ionic cross-linking calcium ions followed by ion exchange (method A) and (b) B). A solution containing sodium borohydride, used as a reducing agent, was subsequently added hydrogels, producing situ clusters nanoparticles embedded hydrogel matrix....

The addition of metal particles, for instance, silver or copper, into polymer matrices is a relevant strategy producing novel antimicrobial materials. By using two particles with diameters around 10 nm and 45 µm, polymers different characteristics, the effect filler size matrix on biocide behavior polymer/copper composites was studied. were prepared by melt mixing, ion release from these materials used to obtain critical information about processes involved. Regarding particle size, our...

The rice leaf, combining the surface properties of lotus leaves and shark skin, presents outstanding superhydrophobic motivating its biomimesis. We created a novel biomimetic rice-leaf by three-level hierarchical structure, using for first time stereolithographic (SLA) 3D printed channels (100µm width) with an intrinsic roughness from printing filaments (10µm), coated TiO2 nanoparticles (22 100nm). This structure maximum advancing contact angle 165° characterized lower both anisotropy...

A set of poly(propylene) composites containing different amounts copper nanoparticles (CNP) were prepared by the melt mixed method and their antimicrobial behavior was quantitatively studied. The time needed to reduce bacteria 50% dropped half with only 1 v/v % CNP, compared polymer without CNP. After 4 h, this composite killed more than 99.9% bacteria. biocide kinetics can be controlled nanofiller content; CNP concentrations higher 10 eliminated 99% in less 2 h. X-ray photoelectron...

Abstract Poly(lactic acid) (PLA) is a biodegradable and biocompatible polyester widely used in biomedical applications. Unfortunately, this biomaterial suffers from some shortcomings related with the absence of both bioactivity antibacterial capacity. In work, composites PLA either graphene oxide (GO) or thermally reduced (TrGO) were prepared by melt mixing to overcome these limitations. GO TrGO inhibited attachment proliferation Escherichia coli Staphylococcus aureus bacteria depending on...

Applying electrical stimulation (ES) could affect different cellular mechanisms, thereby producing a bactericidal effect and an increase in human cell viability. Despite its relevance, this bioelectric has been barely reported percolated conductive biopolymers. In context, electroactive polycaprolactone (PCL) scaffolds with Thermally Reduced Graphene Oxide (TrGO) nanoparticles were obtained by 3D printing method. Under direct current (DC) along the scaffolds, strong antibacterial was...

Polymer-based nanocomposites such as polycaprolactone/graphene oxide (PCL/GO) have emerged alternatives for bone tissue engineering (BTE) applications. The objective of this research was to investigate the impact a gelatin (Gt) coating on degradability and different properties PCL nanofibrous scaffolds fabricated by an electrospinning technique with 1 2 wt% GO. Uniform PCL/GO fibers were obtained beadless structure rough surface. exhibited increase in their crystallization temperature (Tc),...

The use of biodegradable polymers to mitigate the environmental pollution is one hot topics research in recent years. current work presents graphene oxide (GO) nanoparticles functionalized with two types alkylamines (decylamine (DA) and octadecylamine (ODA)) synthesized at different temperatures; 25 °C (GODA1 GOODA1) 80 (GODA2 GOODA2), which were used as fillers prepare PLA nanocomposites their barrier, mechanical, thermal properties studied. elemental analysis showed 2 wt% 4 nitrogen...

Synthetic silica nanospheres of 20 and 100 nm diameter were produced via the sol‐gel method to be used as filler in polypropylene (PP) composites. Modification surface was further performed by reaction with organic chlorosilanes order improve particles interaction hydrophobic polyolefin matrix. These nanoparticles characterized using transmission electronic microscopy (TEM), elemental analysis, thermogravimetric analysis (TGA), solid‐state nuclear magnetic resonance (NMR) spectroscopy. For...

Abstract Novel multifunctional scaffolds for bone regeneration can be developed by incorporation of bioactive glasses (BG) doped with therapeutic and antibacterial metal ions, such as copper (Cu) zinc (Zn), into a biodegradable polymer. In this context, porous composite materials poly( d , l ‐lactide) (PDLLA) mixed sol‐gel BG chemical composition 60SiO 2 ; 25CaO; 11Na O; 4P O 5 (mol %) either 1 mol % CuO or ZnO, both metals, were prepared. The cytocompatibility the on marrow stromal cells...

CaCO₃ nanoparticles of around 60 nm were obtained by a co-precipitation method and used as filler to prepare low-density polyethylene (LDPE) composites melt blending. The also organically modified with oleic acid (O-CaCO₃) in order improve their interaction the LDPE matrix. By adding 3 5 wt% nanofillers, mechanical properties under tensile conditions polymer matrix improved 29%. pure sample nanocomposites photoaged ultraviolet (UV) irradiation during 35 days carbonyl index (CI), degree...