Non-Resorbable Nanocomposite Membranes for Guided Bone Regeneration Based on Polysulfone-Quartz Fiber Grafted with Nano-TiO2

Abstract

The polymer-inorganic nanoparticles composite membranes are the latest solutions for multiple physicochemical resistance and selectivity requirements of membrane processes. This paper presents the production of polysulfone-silica microfiber grafted with titanium dioxide nanoparticles (PSf-SiO2-TiO2) composite membranes. Silica microfiber of length 150–200 μm and diameter 12–15 μm were grafted with titanium dioxide nanoparticles, which aggregated as microspheres of 1–3 μm, applying the sol-gel method. The SiO2 microfibers grafted with nano-TiO2 were used to prepare 12% polysulfone-based nanocomposite membranes in N-methyl pyrrolidone through the inversion phase method by evaporation. The obtained nanocomposite membranes, PSf-SiO2-TiO2, have flux characteristics, retention, mechanical characteristics, and chemical oxidation resistance superior to both the polysulfone integral polymer membranes and the PSf-SiO2 composite membranes. The antimicrobial tests highlighted the inhibitory effect of the PSf-SiO2-TiO2 composite membranes on five Gram (-) microorganisms and did not allow the proliferation of Candida albicans strain, proving that they are suitable for usage in the oral environment. The designed membrane met the required characteristics for application as a functional barrier in guided bone regeneration.

Topographic characterization and in vitro biofilm adhesion to titanium and polypropylene membranes used for alveolar preservation

“…[ 25 ] However, most nonresorbable membranes have a significant complication associated with increased vertical bone crest, lack of soft tissue for primary closure, oral exposure, and subsequent bacterial colonization, requiring premature removal, with consequent loss of bone graft. [ 26 ] Despite these disadvantages, there is not a membrane with all the ideal characteristics. In addition, resorbable membranes have as a disadvantage the resorption time, which needs to be strictly controlled to allow a new bone formation, besides the effect of its degradation, mainly via hydrolysis, which can create an acidic environment, impairing the regeneration of bone tissue.…”

Applicability of Ferromagnetic Nanoparticles in the Retention of Heavy Metals from Aqueous Solutions

“…The magnetic nanoparticles were previously obtained and presented in the our group [15][16][17][18][20][21][22].…”

“…This paper is based on the previous experience of the research group on the preparation and characterization of magnetic nanoparticles [15][16][17][18][19][20] and their use in order to regulate the biological load of the water [21], now approaching the removal of metal ions of interest.…”

Supermagnetic Sugarcane Bagasse Hydrochar for Enhanced Osteoconduction in Human Adipose Tissue-Derived Mesenchymal Stem Cells

“…However, the carbonation of SCB and its functionalization as a scaffold material are of high interest and have not been exploited yet. Some other reusable materials such as quartz (silica microfibers) from the optical devices industry are used for scaffolds as introduced in the paper by G. Nechifor et al, 2019 [ 11 ]. Looking at the higher cost of extensively studied tissue engineering scaffold materials, carbonized SCB might provide a cheap source that can be functionalized and applied as a scaffold material.…”