In situ synthesis of mesoporous polyvinyl alcohol/hydroxyapatite composites for better biomedical coating adhesion

ObstractThe aim of this work was to determine selected physical properties of biodegradable thermoplastic starch (TPS) filling foams manufactured by extrusion-cooking technique from different combinations of potato starch and two additives: poly(vinyl alcohol) PVA and Plastronfoam PDE. Foams were processed with seven starch/additives combinations at two different extruder-cooker's screw rotational speeds. The densities of starch foams depended significantly on the additive type and content. The linear relationship between the Young modulus and the ultimate compression force and apparent density was found. The foams processed with the addition of PVA had low density, porosity and lower values of the Young modulus than the foams prepared with PDE.

show abstract

“…Other auxiliary materials, like poly(vinyl alcohol), assist in controlling the adhesive properties of the material surface [32][33][34] .…”

Section: Introductionmentioning

confidence: 99%

Effect of PVA and PDE on selected structural characteristics of extrusion-cooked starch foams

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Xiao et al [17] observe the hydroxyapatite coatings thickness is around 50μm obtained from deposition at voltage 30V for 1 minute. Through voltage 30V for 10 minutes, Hussain et al [45] obtain homogeneous, adhesive, and uniform coatings. Drevet et al [21] produce hydroxyapatite coatings optimal were acquired by voltage 10V for 10 minutes.…”

Section: Resultsmentioning

confidence: 99%

“…In suggestion, the suitable thickness for implantation is around 50μm. Based on Hamaker equation, the deposition rate of hydroxyapatite coating will improve along with prolonging of deposition time [45], [46]. However, Li et al [36] found that the deposition rate decreases in line with the addition of time.…”

Section: Resultsmentioning

confidence: 99%

“…The long increasing of times will affect decrease current density, so saturation occurs. This decline can be influenced by insulator hydroxyapatite ceramic materials [18], [45], [47]. Increasing of resulted thickness along with increasing of time can improve coating resistance and decrease current flow.…”

Section: Resultsmentioning

confidence: 99%

“…After achieving the certain time, migration of particle will reduce due to voltage saturation in a long time. It means the voltage and deposition time would influence the coating thickness [45]. The long time-result lead to performance to particle resistance for current potential and thereby surface uncovered properly; crack propagation when heat treatment was given; and coating degradation since implantation [11], [13], [36].…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Hydroxyapatite Coating on Titanium Alloy Ti-6Al-4V with Electrophoretic Deposition (EPD) for Dental Root Application

Juliadmi

Fauzi

Gunawarman

et al. 2017

International Journal on Advanced Science, Engineering and Information Technology

View full text Add to dashboard Cite

An α+β type titanium alloy, Ti-6Al-4V, has been coated with hydroxyapatite through electrophoretic deposition (EPD) method to improve quality of the alloy surface, in order to fulfill bioactivity requirement for orthodontic application as dental roots. The deposition process was conducted by EPD at different voltages (2 volts, 5 volts, and 10 volts) and time (2 minutes and 5 minutes). After deposition, the material was heated at temperature 700 o C for 1 hour using a vacuum furnace. Coated samples analysis was conducted by scanning electron microscope (SEM) and energy dispersive X-ray (EDX) to examine coating layer morphology and its chemical composition, respectively. Experimental results showed that the voltage and time deposition gives different effects to surface coverage and thickness of hydroxyapatite layers. Optimum layer for dental roots is obtained from the voltage of 5 volts for 5 minutes with 100% surface coverage value and 45.55μm in thickness. With low voltage and short deposition time for making a uniform coating layer, this process is much cheaper than other processes, and it is predicted to be favorable for improving osseointegration of dental roots.

show abstract

Enhanced Surface Properties of Hydroxyapatite by Grafting Tartaric Acid for Sustained Release of Moxifloxacin

et al. 2019

Self Cite

View full text Add to dashboard Cite

Grafting of material with organic functionalities helps to tune material's surface properties. Surface properties of a biomaterial play a significant role for sustained release of therapeutic agent. To evaluate the effect of tartaric acid concentration on HA surface properties and phase purity, a series of tartaric acid grafted HA (t-HA) samples were prepared via in situ wet chemical synthesis. Grafting of HA with tartaric acid improved its surface properties. The surface area of 737 m 2 /g was gained when 0.05 mole equivalent of tartaric acid was used for HA grafting. X-ray diffraction patterns of t-HA samples have shown low degree of crystallinity compared to HA sample. XRD results showed the formation of calcium tartrate phase along with HA when higher concentration of tartaric acid was used for synthesis. The HA and t-HA samples were explored for the delivery of moxifloxacin. High surface area, surface charge and low degree of crystallinity have improved electrostatic interaction between the drug and t2-HA and help in sustained release of moxifloxacin. In vitro antibacterial activity of drug loaded samples showed activity against S. aureus. Calcium tartrate containing samples t3-HA, t4-HA and t5-HA showed, however, moderate inhibition against S. aureus without drug. In vitro cell studies by using MC3T3 cell line showed that prepared HA and t-HA samples did not exhibit any cytotoxic effect.

show abstract

In situ synthesis of mesoporous polyvinyl alcohol/hydroxyapatite composites for better biomedical coating adhesion

Cited by 26 publications

References 39 publications

Effect of PVA and PDE on selected structural characteristics of extrusion-cooked starch foams

Effect of PVA and PDE on selected structural characteristics of extrusion-cooked starch foams

Hydroxyapatite Coating on Titanium Alloy Ti-6Al-4V with Electrophoretic Deposition (EPD) for Dental Root Application

Enhanced Surface Properties of Hydroxyapatite by Grafting Tartaric Acid for Sustained Release of Moxifloxacin

Contact Info

Product

Resources

About