Effect of Ag2+ and C+ Ion Implantation on the Surface Physicochemical Properties of Polylactic Acid, Hydroxyapatite, and Their Composites

Laput, O.A.; Васенина, И.В.; Курзина, И. А.

doi:10.1134/s2075113320030296

Cited by 2 publications

(4 citation statements)

References 8 publications

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“…When synthesized and dried, the PLA is a ball of fibers, as one can see in the right upper corner of Figure 2 . Hydroxyapatite synthesis was carried out using the liquid-phase method with microwave radiation at pH ~11 according to the patented technology [ 16 , 27 ] by the following equation: 10Ca(NO 3 ) 2 + 6(NH 4 ) 2 HPO 4 + 8NH 3 ∙H 2 O → Ca 10 (PO 4 ) 6 (OH) 2 + 20NH 4 NO 3 + 6H 2 O …”

Section: Methodsmentioning

confidence: 99%

“…During the analysis, a standard charge compensation system with low electron and ion energy (~0.1 eV) was used. Further analysis of the elemental composition was carried out using the Casa XPS program [ 16 ]. The calculation of the atomic content of the elements was carried out using the characteristic factors of relative sensitivity.…”

Section: Methodsmentioning

confidence: 99%

“…When synthesized and dried, the PLA is a ball of fibers, as one can see in the right upper corner of Figure 2. Hydroxyapatite synthesis was carried out using the liquid-phase method with microwave radiation at pH ~11 according to the patented technology [16,27] For obtaining the experimental composites PLA/HA, a polylactic acid solution was mixed with a hydroxyapatite powder under constant stirring. The mass ratios of the components were 80/20, 70/30, and 60/40 of the PLA and HA, respectively.…”

Section: Preparation Of the Experimental Samplesmentioning

confidence: 99%

“…Under conditions of energy exposure, complex physicochemical processes are initiated in the surface layers of materials that can significantly change the structural and functional properties of their surface [ 15 ]. It is known that plasma modification affects the physicochemical and functional characteristics of the surface without changing the bulk properties of the materials [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen Plasma Treatment of Composite Materials Based on Polylactic Acid and Hydroxyapatite

Khomutova,

Korzhova,

Bryuzgina

et al. 2024

Polymers

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The effect of surface modification by an arc discharge plasma in a nitrogen flow with treatment durations of 5 and 10 min on the physicochemical properties and biocompatibility of the surface of composites based on polylactic acid and hydroxyapatite (PLA/HA) with different mass ratios (80/20, 70/30, 60/40) has been investigated. The aim of this work was to show the correlation between the changes of the physicochemical characteristics (chemical compound, morphology, wettability) of the surface layer of the PLA/HA composites and the cell viability (macrophages) in the presence of the plasma-modified materials. The dependence of alterations of the functional properties (wettability, biocompatibility) on the change in the chemical composition under the plasma exposure has been established. The chemical composition was studied using X-ray photoelectron spectroscopy (XPS), the surface morphology was researched with scanning electron microscopy (SEM), and the wettability of the composite’s surface was analyzed by measuring the contact angle and surface energy calculation. In addition, the viability of macrophages was investigated when the macrophages from three donors interacted with a modified PLA/HA surface. It was found that the formation of the new functional groups, –C-N and N-C=O/C=O, improves the wettability of the surface of the composites and promotes the viability of macrophages in the presence of the composite materials. The fundamental principles for obtaining promising materials with the required properties for eliminating bone defects have been created.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…When synthesized and dried, the PLA is a ball of fibers, as one can see in the right upper corner of Figure 2. Hydroxyapatite synthesis was carried out using the liquid-phase method with microwave radiation at pH ~11 according to the patented technology [16,27] For obtaining the experimental composites PLA/HA, a polylactic acid solution was mixed with a hydroxyapatite powder under constant stirring. The mass ratios of the components were 80/20, 70/30, and 60/40 of the PLA and HA, respectively.…”

Section: Preparation Of the Experimental Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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