Structural-phase state and surface properties of composite materials based on polylactide and hydroxyapatite

Syusyukina, V. A.; Shapovalova, Yelena; Коротченко, Н. М.; Курзина, И. А.

doi:10.1134/s1070427217010165

Cited by 9 publications

(6 citation statements)

References 14 publications

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“…For each cycle, we determined the percentage of adsorption efficiency (ads (%)) as expressed in Eq. (11). For HAP/HPAM-75, the determined percentages are 78.72%, 72.88%, and 72.26%, corresponding respectively to the regeneration cycles from the first cycle to the third one.…”

Section: Composite Reusementioning

confidence: 91%

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In situ preparation of hydroxyapatite composites into hydrolyzed polyacrylamidesolution and methylene blue dye retention

Mansri¹,

Mahroug²,

Dergal³

2019

Turk J Chem

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Four composites of hydroxyapatite/hydrolyzed polyacrylamide (HAP/HPAM-n) were prepared using an in situ wet chemical method. The synthesis was performed by preparing a suspension of calcium in a copolymer solution having a known HPAM concentration. Phosphoric acid was added dropwise to each suspension to obtain HAP/HPAM-n composites. The effect of initial copolymer amount on the composite properties was investigated using XRD, FTIR, TGA, and SEM/EDS analysis. The obtained results were compared to the HAP sample synthesized under the same conditions and without copolymer. HPAM amount in the composite affects the retention of methylene blue (MB) dye. The result shows that the increase of HPAM in the material leads to the increase of the dye retention capacity. Therefore, the composite prepared with a higher copolymer amount was selected to study the effects of different parameters on the dye removal including contact time, concentration, pH, temperature, and composite regenerations. We deduce in this work that the composite HAP/HPAM-75 is a good candidate for MB dye retention from aqueous solution with a maximum removal capacity of 435.6 mg g −1 and the possibility of its reuse for several times.

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Section: Composite Reusementioning

confidence: 91%

“…El-Hag Ali 10 reported the in situ synthesis of nanohydroxyapatite within gelatin/acrylic acid copolymer hydrogels using γ -radiation induced copolymerization and cross-linking. Syusyukina et al 11 reported the preparation of composite materials based on polylactide and HAP using already prepared HAP and polymer.…”

Section: Introductionmentioning

confidence: 99%

In situ preparation of hydroxyapatite composites into hydrolyzed polyacrylamidesolution and methylene blue dye retention

Mansri¹,

Mahroug²,

Dergal³

2019

Turk J Chem

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“…The structural formulas of PLA and HA are shown in Figure 1 . The preparation of the PLA/HA samples was carried out according to a previously proposed scheme [ 11 ] in the laboratory of the National Research Tomsk State University (NR TSU, Tomsk, Russia). Polylactic acid was obtained from l -lactid initial monomer synthesized in advance in the Laboratory of Polymers and Composite Materials at Tomsk State University according to the technique described in [ 25 , 26 ].…”

Section: Methodsmentioning

confidence: 99%

“…The purpose of these studies is to improve the adhesion of the constituent phases in the boundary layers and increase the mechanical strength of the material [ 10 ]. It was previously found [ 11 ] that the mass ratios of polylactic acid/hydroxyapatite (PLA/HA) components of 80/20, 70/30, and 60/40 are optimal for obtaining materials with high functional properties. The main disadvantage of these materials is the absence on the surface that comes into contact and interacts with the biological environment of carboxyl and nitrogen-containing and other functional groups [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

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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“…There are a number of works only indirectly related to the topic under consideration. In the articles [10,11], the dependence of the surface roughness on the composition of the composite is considered, and in the work [12] -a tribological study on the verification of the composite friction.…”

Section: Introductionmentioning

confidence: 99%

Change in surface roughness of composite piles when pressing into the ground

Boyarintsev

Sukhov²,

Tumashevskaia³

2023

E3S Web Conf.

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The bearing capacity of piles on the ground is one of the main characteristics of pile foundations, which is responsible for its interaction with the ground. This characteristic depends on many factors: the granulometric composition of the soil, its moisture content, con-sistency, texture, as well as the type and properties of the pile material. One of the main charac-teristics of the pile material is its surface roughness. In many studies, the dependence of the angle of friction of the soil against the material of the pile on the value of the roughness of its surface was noted. At the same time, all studies focused exclusively on the dependence of the angle of friction on the roughness, not paying attention to the possibility of its variability in the process of driving the pile into the ground. This goal was set in the framework of this study. Using a standard single-plane cutter, the passage of a composite pile at a distance of 0.5m was simulated at a depth of 10 m. Before and after the test, the surface roughness parameters were measured using the Seitronic PSh8-1 SS device. The results showed that after the test, the roughness of the fiberglass plate made on the basis of polyester resin by the pultrusion method decreased by 44.4%.

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Structural-phase state and surface properties of composite materials based on polylactide and hydroxyapatite

Cited by 9 publications

References 14 publications

In situ preparation of hydroxyapatite composites into hydrolyzed polyacrylamidesolution and methylene blue dye retention

In situ preparation of hydroxyapatite composites into hydrolyzed polyacrylamidesolution and methylene blue dye retention

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

Change in surface roughness of composite piles when pressing into the ground

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