Biocompatibility analysis of PMMA-TiO2 and PMMA-ZrO2 organic-inorganic hybrids coatings deposited on Ti6Al4V titanium alloy

• Grant number: 17/02899-1
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Effective date (Start): August 01, 2017
• Effective date (End): July 31, 2018
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Peter Hammer
• Grantee: Samarah Vargas Harb
• Supervisor: Ali Khademhosseini
• Host Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Research place: Harvard University, Cambridge, United States
• Associated to the scholarship: 15/09342-7 - Development of multifunctional PMMA- (TiO2, ZrO2 and CeO2)hybrids, BP.DR

Abstract

Using the sol-gel process organic-inorganic hybrids will be synthesized consisting of poly(methyl methacrylate) (PMMA) covalently bonded to TiO2 and ZrO2 inorganic phases through the coupling agent 2-hydroxyethyl methacrylate (HEMA). PMMA-TiO2 and PMMA-ZrO2 hybrids coatings will be deposited onto Ti6Al4V titanium alloy by dip-coating aiming to obtain multifunctional hybrids systems that combine properties such as high mechanical strength, thermal stability, anticorrosive characteristics and biocompatibility. The syntheses of the nanocomposites involve sol-gel reactions of titanium isopropoxide or zirconium propoxide, and subsequent radical polymerization of different fractions of HEMA and methyl methacrylate (MMA), using benzoyl peroxide (BPO) as thermal initiator. The structural, thermal and electrochemical characterization of the hybrids will be performed at the Chemistry Institute (UNESP) and will be presented in the annual report. During the internship at the Harvard University the activities will involve the biological characterization of PMMA-TiO2 and PMMA-ZrO2 films employing organ-on-a-chip devices to evaluate their biocompatibility for implant applications. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

HARB, V, SAMARAH; BASSOUS, NICOLE J.; DE SOUZA, THIAGO A. C.; TRENTIN, ANDRESSA; PULCINELLI, SANDRA H.; SANTILLI, V, CELSO; WEBSTER, THOMAS J.; LOBO, ANDERSON O.; HAMMER, PETER. Hydroxyapatite and beta-TCP modified PMMA-TiO2 and PMMA-ZrO2 coatings for bioactive corrosion protection of Ti6Al4V implants. Materials Science & Engineering C-Materials for Biological Applications, v. 116, NOV 2020. (15/11907-2, 17/14061-2, 17/02899-1)

AFEWERKI, SAMSON; BASSOUS, NICOLE; HARB, SAMARAH VARGAS; CORAT, MARCUS ALEXANDRE F.; MAHARJAN, SUSHILA; RUIZ-ESPARZA, GUILLERMO U.; DE PAULA, MIRIAN M. M.; WEBSTER, THOMAS J.; TIM, CARLA ROBERTA; VIANA, BARTOLOMEU CRUZ; et al. Engineering multifunctional bactericidal nanofibers for abdominal hernia repair. COMMUNICATIONS BIOLOGY, v. 4, n. 1, FEB 19 2021. (17/02899-1)