PMMA-silica nanocomposite coating: Effective corrosion protection and biocompatibility for a Ti6Al4V alloy

Harb, Samarah Vargas; Uvida, Mayara Carla; Trentin, Andressa; Lobo, Anderson de Oliveira; Webster, Thomas J.; Pulcinelli, Sandra Helena; Santilli, Celso Valentim; Hammer, Peter

doi:10.1016/j.msec.2020.110713

Cited by 29 publications

(16 citation statements)

References 40 publications

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“…Recent results showed that the anticorrosive performance and durability of PMMA–silica coatings depend sensitively on the type of interphase between the uniformly distributed silica nodes and the polymeric phase, as well as the proportion between both phases and the amount of thermal initiator of polymerization. , The covalent conjugation of PMMA with silica nanodomains through a molecular coupling agent such as MPTS is the key element in achieving a dense nanostructured hybrid network that acts as an efficient barrier against the diffusion of corrosive species. The silica phase is responsible for the contraction of the polymeric segments − , and the adhesion of the coating to the metallic surface, , while the PMMA matrix contributes to maintain a hermetically sealed nanostructure. ,,, This type of hybrid material was investigated as a protective coating on carbon steel, − aluminum alloys, ,, and titanium alloy; however, studies on reinforcing steel were not reported so far. In addition, in previous studies, tetrahydrofuran (THF) was used as a solvent, presenting disadvantages associated with environmental and health impacts, flammability, reactivity, and stability …”

Section: Introductionmentioning

confidence: 84%

Nanostructured Poly(methyl Methacrylate)–Silica Coatings for Corrosion Protection of Reinforcing Steel

Uvida

Trentin

Harb

et al. 2022

ACS Appl. Nano Mater.

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In the absence of preventive maintenance, corrosion of structural steel by the deterioration of the passive layer due to exposure to aggressive environments is the main failure factor of reinforced concrete. To overcome economic, safety, and environmental implications, present research efforts focus on eco-friendly organic–inorganic hybrid coatings to achieve effective protection of reinforcing steel. Nanostructured PMMA (poly(methyl methacrylate))–silica coatings developed by combining reactions of the polymerization of methyl methacrylate and 3-[(methacryloxy)propyl]trimethoxysilane with the sol–gel hydrolytic condensation of tetraethyl orthosilicate using isopropanol as a solvent represent a promising approach to accomplish this goal. The nanoscale dispersion of silica nodes covalently conjugated with PMMA chains led to transparent, homogeneous, and pore-free coatings deposited with a thickness of 15 μm on 2D and 3D reinforcing steel. Mechanical, thermal, and surface analyses showed a strong adhesion of the coating to the substrate surface (15.9 MPa), a thermal stability of up to 256 °C, and a contact angle of about 75°. Electrochemical assays in standard 3.5 wt % NaCl solution, simulated carbonated, and alkaline concrete pore solutions confirmed effective corrosion protection, with an impedance modulus of up to 100 GΩ cm2 (at 4 mHz) and a lifetime of more than 670 days. Hence, PMMA–silica hybrid coatings are an eco-friendly and efficient alternative to protect reinforcing steel against corrosion, helping to prevent structural failures and fatal accidents.

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Section: Introductionmentioning

confidence: 84%

Nanostructured Poly(methyl Methacrylate)–Silica Coatings for Corrosion Protection of Reinforcing Steel

Uvida

Trentin

Harb

et al. 2022

ACS Appl. Nano Mater.

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“…The coating prepared by electrophoretic deposition method revealed antibacterial activity against Staphylococcus aureus strain and good osteoconductive properties, as it had the ability to increase adhesion, proliferation, and mineralization of MC3T3-E1 cells. While Harb et al [68] prepared poly(methyl methacrylate)-silicon dioxide (PMMA/SiO 2 ) coatings on Ti-6Al-4V alloy by using dip-coating process. They found that the composite coating enhanced hFOB 1.19 cell proliferation compared to the PMMA coating and to the uncoated Ti-6Al-4V alloy.…”

Section: Inorganic and Composite Coatingsmentioning

confidence: 99%

Osteoconductive and Osteoinductive Surface Modifications of Biomaterials for Bone Regeneration: A Concise Review

Kazimierczak

Przekora

2020

Coatings

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The main aim of bone tissue engineering is to fabricate highly biocompatible, osteoconductive and/or osteoinductive biomaterials for tissue regeneration. Bone implants should support bone growth at the implantation site via promotion of osteoblast adhesion, proliferation, and formation of bone extracellular matrix. Moreover, a very desired feature of biomaterials for clinical applications is their osteoinductivity, which means the ability of the material to induce osteogenic differentiation of mesenchymal stem cells toward bone-building cells (osteoblasts). Nevertheless, the development of completely biocompatible biomaterials with appropriate physicochemical and mechanical properties poses a great challenge for the researchers. Thus, the current trend in the engineering of biomaterials focuses on the surface modifications to improve biological properties of bone implants. This review presents the most recent findings concerning surface modifications of biomaterials to improve their osteoconductivity and osteoinductivity. The article describes two types of surface modifications: (1) Additive and (2) subtractive, indicating biological effects of the resultant surfaces in vitro and/or in vivo. The review article summarizes known additive modifications, such as plasma treatment, magnetron sputtering, and preparation of inorganic, organic, and composite coatings on the implants. It also presents some common subtractive processes applied for surface modifications of the biomaterials (i.e., acid etching, sand blasting, grit blasting, sand-blasted large-grit acid etched (SLA), anodizing, and laser methods). In summary, the article is an excellent compendium on the surface modifications and development of advanced osteoconductive and/or osteoinductive coatings on biomaterials for bone regeneration.

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“…Osseointegration was defined as the process of achieving and maintaining rigid fixation between bone and implants in direct contact with the implants under a functional load (Albrektsson et al, 1981;Albrektsson and Johansson, 2001). However, Ti6Al4V widely used in clinical practice has poor osseointegration performance, which limits its early biological fixation and long-term stability with bone (Man et al, 2018;Harb et al, 2020;Avila et al, 2021). The reason for the above phenomenon is that Ti6Al4V is a biologically inert material, which has no bioactivity and osteoinductivity (Wu et al, 2008;Li et al, 2016a).…”

Section: Introductionmentioning

confidence: 99%

The application of biomaterials in osteogenesis: A bibliometric and visualized analysis

Wang

Chen

Yang

et al. 2022

Front. Bioeng. Biotechnol.

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Osteogenesis serves an important role in bone tissue repairing. Novel biomaterials are widely prevalent as materials for orthopedic implants due to their biocompatibility and osteogenetic ability. The purpose of this study was to comprehensively analyze hotspots and future trend of biomaterials research in osteogenesis based on bibliometric and visualized analysis. A total of 1,523 papers about biomaterials research in osteogenesis between 2000 and 2021 were included in this study. During the above 20 years, China’s leading position in the global biomaterials research in osteogenesis was obvious, and it was also the country that most frequently participates in international cooperation. Chinese Academy of Sciences was the most productive institution and the leader of research cooperation. Acta Biomaterialia and Biomaterials have published the largest number of articles in the field of biomaterials research in osteogenesis. Meanwhile, Acta Biomaterialia and Biomaterials were also the two journals with the highest total citation frequency. Wu CT, Chang J, Kaplan DL, and Xiao Y all made important contributions in the field of biomaterials research in osteogenesis. At present, there are five research hotspots in the field of biomaterials research in osteogenesis: 1) the immunomodulatory role of biomaterial-related inflammatory; 2) mechanisms of osteogenesis in biomaterials; 3) 3D printing and clinical application of biomaterials; 4) bone tissue engineering for biomaterial osteogenesis; and 5) regenerative medicine for biomaterial osteogenesis. The results of this study showed that mechanisms of osteogenesis in biomaterials, bone tissue engineering for biomaterial osteogenesis, and regenerative medicine for biomaterial osteogenesis will remain research hotspots in the future. International cooperation was also expected to expand and deepen the field of biomaterials research in osteogenesis.

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PMMA-silica nanocomposite coating: Effective corrosion protection and biocompatibility for a Ti6Al4V alloy

Cited by 29 publications

References 40 publications

Nanostructured Poly(methyl Methacrylate)–Silica Coatings for Corrosion Protection of Reinforcing Steel

Nanostructured Poly(methyl Methacrylate)–Silica Coatings for Corrosion Protection of Reinforcing Steel

Osteoconductive and Osteoinductive Surface Modifications of Biomaterials for Bone Regeneration: A Concise Review

The application of biomaterials in osteogenesis: A bibliometric and visualized analysis

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