Biopolymer-based hydrogels for encapsulation of photocatalytic TiO 2 nanoparticles prepared by the freezing/thawing method

Badranova, Gulfiya U.; Готовцев, П. М.; Zubavichus, Yan V.; Staroselskiy, Ivan A.; Vasiliev, Alexander L.; Trunkin, I. N.; Fedorov, Maxim V.

doi:10.1016/j.molliq.2016.07.135

Cited by 26 publications

(17 citation statements)

References 42 publications

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“…Elastic behavior is related to the number of cross-links and bridges in the material [41] thus the higher G'1 Hz magnitude was associated with tougher hydrogel (SSG-20TiO2), which were in accordance with stress sweep findings (Table 2). However, the results demonstrated clearly that further addition of Similar observations were recently reported on the effect of nano-TiO2 in collagen or collagen/chitosan [41], poly(vinyl alcohol) [44] and chitin [45] Table 3 Table 4 Power law model (Eqs. (1), (2) and (3)) delineated adequately the frequency dependence of the G', G" and G * moduli for all SSG-based instances.…”

Section: Figuresupporting

confidence: 79%

Physicochemical and rheo-mechanical properties of titanium dioxide reinforced sage seed gum nanohybrid hydrogel

Oleyaei

Razavi

Mikkonen

2018

International Journal of Biological Macromolecules

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Sage seed gum (SSG) is a promising biopolymer candidate for utilization and substitution prevalent galactomannan gels of interest in soft biomaterial applications. Herein, physicochemical and rheo-mechanical properties of SSG matrix reinforced by various titanium dioxide (TiO) nanoparticles loading (0-25wt%) were monitored. Particle size and density of the nanocomposite increased with raising TiO content, due to the creation of more compact agglomerated and aggregated microstructure. Increasing the particle size resulted in lower electrophoretic mobility of SSG-TiO systems upon nanoparticles addition, confirmed the adsorption of TiO on the SSG macromolecule. Mechanical spectra of the SSG-based nanocomposites demonstrated a more solid-like behavior by lower frequency-dependent viscoelastic moduli, suggested a structural decoration of the nanohybrid gels discussed in terms of polymer bridging effect and formation of percolated matrix-particle superstructure. Crucial textural parameters improved with increasing TiO until a critical level (15 wt%), after which further increments in filler resulted in a reduction of hardness, adhesiveness and apparent modulus of elasticity. Deformation of rod-like junction zones acting as physical crosslinks in the system and fracture theory were used to explain the strain-stiffening and adhesive behavior of SSG-based gels, respectively. The nanocomposite gels with tunable functional properties might be ideal candidates for biomaterial industry.

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Section: Figuresupporting

confidence: 79%

Physicochemical and rheo-mechanical properties of titanium dioxide reinforced sage seed gum nanohybrid hydrogel

Oleyaei

Razavi

Mikkonen

2018

International Journal of Biological Macromolecules

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“…Besides, CRG with its significant number of functional groups is capable to application-driven tailoring of the microstructure of hydrogels [27]. PVA gives the possibility to impart mechanical strength and stability to the hydrogel [29, 30, 31, 32, 33, 35]. It is necessary to mention that, today PVA is one of most actively used components for hydrogels [37, 38].…”

Section: Introductionmentioning

confidence: 99%

“…It is necessary to mention that, today PVA is one of most actively used components for hydrogels [37, 38]. The different variants of PVA-based hydrogels with CRG [35, 36], cellulose [39, 40] and other component including conductive polymers are described [15, 37].…”

Section: Introductionmentioning

confidence: 99%

Electroconductive PEDOT:PSS-based hydrogel prepared by freezing-thawing method

Готовцев

Badranova

Zubavichus

et al. 2019

Heliyon

Self Cite

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Biopolymer-based composition with adding of conductive polymer poly-(3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT PSS) was made by mixing of iota-carrageenan (CRG), polyvinyl alcohol (PVA) and PEDOT PSS followed by freezing/thawing cycles. The method is environmentally friendly and based on the formation of polymer matrix upon of mixing CRG, PVA and PEDOT PSS and formation of porous physical gel due to freezing/thawing cycles. It is necessary to mention that all components are well-known as biocompatible materials. The resulting material is stable in water and also has swelling capability both in distilled water and physiological solutions. Structure of material was characterized by means of X-ray diffraction, optical and electron microscopy. Electrophysical investigations also were performed. The conductivity of the gel immersed in distilled water is comparable with the dry gel value and close to 0.01 [S/cm].

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“…Ionic-crosslinked and chemically crosslinked PVA/κ-carrageenan hydrogels and films have been found to possess excellent in vivo biocompatibility and functionality as drug release vehicles [ 26 , 27 ]. Composite PVA/κ-carrageenan hydrogel matrices obtained through physical crosslinking have also been applied as sorbents for cationic dyes [ 28 ] or as support for photocatalytic oxides [ 29 ] and bacteria [ 30 ] in environmental remediation applications.…”

Section: Introductionmentioning

confidence: 99%

Diffusion and Controlled Release in Physically Crosslinked Poly (Vinyl Alcohol)/Iota-Carrageenan Hydrogel Blends

et al. 2020

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This paper reports the obtaining of poly (vinyl alcohol) and ι-carrageenan blend hydrogels by physical crosslinking (consecutive freeze–thaw cycles). The two polymers were completely miscible in the weight ratio interval used in this study, as determined by solution viscometry data. Strong interactions through hydrogen bonding and forming of mixed interpolymer crystalline domains were observed, which are responsible for the formation of stable drug release-tunable matrices. The release profiles of three model antibiotic drugs (amoxicillin, tetracycline hydrochloride, and gentamicin sulfate) were assessed in a pH interval between 3 and 7.3. They were found to be strongly dependent on the drug chemistry, mesh size of the hydrogels, swelling mechanism, and pH of the release medium. A decrease of up to 40% in the release rates and up to 10% in the diffusion coefficients of the model drugs was registered with the increase in ι-carrageenan content.

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Biopolymer-based hydrogels for encapsulation of photocatalytic TiO 2 nanoparticles prepared by the freezing/thawing method

Cited by 26 publications

References 42 publications

Physicochemical and rheo-mechanical properties of titanium dioxide reinforced sage seed gum nanohybrid hydrogel

Physicochemical and rheo-mechanical properties of titanium dioxide reinforced sage seed gum nanohybrid hydrogel

Electroconductive PEDOT:PSS-based hydrogel prepared by freezing-thawing method

Diffusion and Controlled Release in Physically Crosslinked Poly (Vinyl Alcohol)/Iota-Carrageenan Hydrogel Blends

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