Preparation of Oleyl Phosphate‐Modified TiO₂/Poly(methyl methacrylate) Hybrid Thin Films for Investigation of Their Optical Properties

Abstract

TiO2nanoparticles (NPs) modified with oleyl phosphate were synthesized through stable Ti–O–P bonds and were utilized to prepare poly(methyl methacrylate)- (PMMA-) based hybrid thin films via theex situroute for investigation of their optical properties. After surface modification of TiO2NPs with oleyl phosphate, IR and13C CP/MAS NMR spectroscopy showed the presence of oleyl groups. The solid-state31P MAS NMR spectrum of the product revealed that the signal due to oleyl phosphate (OP) shifted upon reaction, indicating formation of covalent Ti–O–P bonds. The modified TiO2NPs could be homogeneously dispersed in toluene, and the median size was 16.1 nm, which is likely to be sufficient to suppress Rayleigh scattering effectively. The TEM images of TiO2/PMMA hybrid thin films also showed a homogeneous dispersion of TiO2NPs, and they exhibited excellent optical transparency even though the TiO2content was 20 vol%. The refractive indices of the OP-modified TiO2/PMMA hybrid thin films changed higher with increases in TiO2volume fraction, and the hybrid thin film with 20 vol% of TiO2showed the highest refractive index (n = 1.86).

On Physical and Chemical Characteristics of Poly(methylmethacrylate) Nanocomposites for Dental Applications. I.

“…1). The poly (methyl methacrylate) (PMMA) properties as: bactericidal properties, glass transition temperatures, modulus, mechanical, optical properties [9] have been significantly improved by introducing nanofillers. Such procedure allowed to overcome its drawbacks (low mechanical resistance, high bacterial contamination, monomer leakage or thermal perception) as denture base material.…”

Waterproof Alkyl Phosphate Coated Fluoride Phosphors for Optoelectronic Materials

“…Alkyl groups are partially displaced by breaking the P À OorC À Obond to yield ab ound phosphate,w hich then reacts further to produce apolyphosphate film. [29] Herein, we present asimple method for coating ahydrophobic alkyl phosphate layer onto the fluorosilicate phosphor K 2 SiF 6 :Mn 4+ (KSFM). [28] TiO 2 nanoparticles that were modified with oleyl phosphate through the formation of stable Ti À O À Pb onds have been utilized to prepare poly(methyl methacrylate) based hybrid thin films with excellent optical transparency (refractive index, n = 1.86).…”

Contact lens, high refractive index, abbe number, hybrid materials, fabrication, enhancement

“…Polymethacrylates: Include, Polymethyl acrylate (PMA), PMMA, HEMA and pHEMA. Hybrid PMMA-dioxide systems have been reported widely (Table 1 and 2), focusing mostly on PMMA-SiO 2 (Soni et al, 2018), PMMA-TiO 2 (Fujita et al, 2015), PMMA-ZrO 2 (Gad et al, 2018). An organic polymer PMMA has synthesized with zirconium oxide nanocrystal by Otsuka and Chujo (2010) to get polymerized material PMMA/ ZrO 2 of above 95% visible light transmittance and increment in RI to 1.534 when applying 38.8 wt.% ZrO 2 content.…”