Preparation of bioactive glass-polyvinyl alcohol hybrid foams by the sol-gel method

Hybrid bioactive glass-polyvinyl alcohol foams for use as scaffolds in tissue engineering were developed through the sol-gel route. Hybrids produced by this route present a high acidic character due to the catalysts added during processing and may also contain residual organics after the drying step. Therefore, an additional cleaning step is necessary to produce biocompatible materials. In this study hybrid PVA/bioactive glass foams were cleaned using various procedures and cytotoxicity evaluation was conducted. All the cleaning methods used increased the cell viability levels compared to samples not subjected to a cleaning procedure. The most effective cleaning procedure used was the immersion in NH4OH solution. The cleaning procedure changed the composition and pore structure of the final material.

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Study Structural properties of Nanocomposite (polyvinyl Alcohol\ (CdO/NiO) via Sol-Gel Method

10.21203/rs.3.rs-498096/v1 ◽

2021 ◽

Author(s):

Amatalkareem Mohammed Al-Jezbi

Keyword(s):

Polyvinyl Alcohol ◽

Structural Properties ◽

Sol Gel ◽

Cadmium Oxide ◽

Antibacterial Activities ◽

Oxide Mixture ◽

Gel Method ◽

Sol Gel Method ◽

Diffraction Patterns ◽

Cracking Process

Abstract This study deals with the synthesis of some physical properties of (CdO/NiO) nanocomposite via Sol-Gel method and their antibacterial activities. The NiO and CdO nanoxides as well as the CdO/NiO oxide mixture were prepared in five samples with different concentrations where the ratio of CdO/NiO was [(1: 0), (3: 1), (1: 1), (1: 3), (0: 1)], by using the gel solution by means of a polyvinyl alcohol solution ( PVA ). The samples were platelimb at (500̊C) for three hours. The structural properties of the prepared oxides resulting from the cracking process were studied. The XRD results showed the presence of pure cadmium oxide diffraction patterns in the sample (S 1 ) as well as pure nickel oxide in the sample (S 5 ), and confirmed the presence of the CdO / NiO oxide mixture in the samples (S 2 , S 3 , S 4 ). The results of XRD also showed, through calculations, that the specific surface area increased with increasing granular size and decreased with decreasing granular size. XRD calculations also showed that the intensity of eruptions decreased as the granular volume increased and, inversely, increased with decreasing granular size.

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Mechanical Behavior of Bioactive Glass-Polyvinyl Alcohol Hybrid Foams Obtained by the Sol-Gel Process

Bioceramics 17 - Key Engineering Materials ◽

10.4028/0-87849-961-x.757 ◽

2005 ◽

pp. 757-760 ◽

Cited By ~ 1

Author(s):

Marivalda Pereira ◽

Showan N. Nazhat ◽

Julian R. Jones ◽

Larry L. Hench

Keyword(s):

Polyvinyl Alcohol ◽

Bioactive Glass ◽

Mechanical Behavior ◽

Sol Gel ◽

Sol Gel Process ◽

Hybrid Foams

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Bioactive glass and hybrid scaffolds prepared by sol–gel method for bone tissue engineering

Advances in Applied Ceramics ◽

10.1179/174367605225011034 ◽

2005 ◽

Vol 104 (1) ◽

pp. 35-42 ◽

Cited By ~ 100

Author(s):

M.M. Pereira ◽

J.R. Jones ◽

L.L. Hench

Keyword(s):

Tissue Engineering ◽

Bioactive Glass ◽

Bone Tissue Engineering ◽

Bone Tissue ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method ◽

Hybrid Scaffolds

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Mechanical Behavior of Bioactive Glass-Polyvinyl Alcohol Hybrid Foams Obtained by the Sol-Gel Process

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.284-286.757 ◽

2005 ◽

Vol 284-286 ◽

pp. 757-760 ◽

Cited By ~ 2

Author(s):

Marivalda Pereira ◽

Showan N. Nazhat ◽

Julian R. Jones ◽

Larry L. Hench

Keyword(s):

Polyvinyl Alcohol ◽

Bioactive Glass ◽

Mechanical Behavior ◽

Sol Gel ◽

Precursor Solution ◽

High Porosity ◽

Soft Tissue Regeneration ◽

Sol Gel Process ◽

Potential Applications ◽

Hybrid Foams

The possibility of enhancing mechanical properties by incorporation of polymeric components to sol-gel derived materials is extremely attractive to prepare macroporous scaffolds, leading to materials with potential applications in both hard and soft tissue regeneration. In this work bioactive glass-polyvinyl alcohol hybrids were developed and their mechanical behavior was evaluated. Hybrids were synthesized by adding polyvinyl alcohol to a sol-gel precursor solution, which was then foamed with the addition of a surfactant and vigorous agitation. The foams were cast, aged and dried at 40°C. A cleaning step to decrease the acidic character of the obtained hybrids was undertaken by immersion in a NH4OH solution. The mechanical behavior of the hybrids was evaluated in compression using both stress and strain control tests. Hybrid foams had a high porosity varying from 60-90% and the macropore diameter ranged from 10 to 600 µm. The modal macropore diameter varied with the inorganic phase composition and with the polymer content in the hybrid. The strain at fracture of the as prepared hybrid foams was substantially greater than pure gel-glass foams. The cleaned hybrids presented a slightly higher strength and lower deformation than the as prepared foams.

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