Sol–gel derived titania hybrid thin films with high refractive index

Wang, Fang; Luo, Zhen; Qing, Shuanggui; Qiu, Qi; Li, Ruifei

doi:10.1016/j.jallcom.2009.06.195

Cited by 23 publications

(14 citation statements)

References 23 publications

(36 reference statements)

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“…Silicon-based materials can contain a variety of active groups, allowing excellent cohesiveness and film-processing properties. 13 Hydrophobic groups, such as methyl groups, may reduce the coating surface energy and improve chemical inertness, and the resulting polymers are biocompatible and have anticoagulant properties, meaning they may be widely applied in biomaterials research. 14 The preparation and theoretical use of Ag-SiO 2 antibacterial agents has been researched by our group over many years.…”

Section: Introductionmentioning

confidence: 99%

Preparation of silicon‐modified antimicrobial polyethylene endotracheal tubes

Jiang

Shen

et al. 2015

J Biomed Mater Res

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Antimicrobial coating of polyethylene endotracheal tubes (PE ETTs) has proven to be an effective method to prevent endoluminal biofilm formation. A transparent siliconmodified antimicrobial PE ETT was obtained by coating PE with a SiO 2 /g-methacryloxypropyl trimethoxy silane (KH-570)/ methyltriethoxysilane (MTES)/Ag-SiO 2 solution prepared by chemically mixing Ag-SiO 2 with SiO 2 /KH-570/MTES in solution via a dip-coating method, with tetraethyl orthosilicate (TEOS) as the inorganic silicon source, followed by drying. All the films were characterized by various techniques, including the pencil hardness test, infrared spectroscopy, scanning electron microscopy, UV-vis analysis, and inductively coupled plasma mass spectrometry (ICP-MS). The results indicated that the TEOS/KH-570/MTES/Ag-SiO 2 (15:6:1:0.6-1.0) films, which exhibited simple in-solution film formation on PE ETTs, had a homogeneous morphology, high transmittance above 87%, high hardness of 5H and strong adhesion to the tubes. The concentration of Ag 1 ion dissolved out from the antibacterial coating is very low in ICP-MS results. The antibacterial test results show that the antibacterial coatings have excellent antibacterial property with antibacterial ratio up to 93.5% when Ag-SiO 2 content is 2.6%. In pyrogen test and hemolytic test, the body temperature of rabbits rise 0.038c for 3 h after inserting antibacterial PE ETT, and the hemolytic ratio is 0.7512%, which conform to the requirements of biomedical material. The results preliminarily proved that the antibacterial materials could be a good candidate of medical catheter material application or medical device surface coating materials.

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Section: Introductionmentioning

confidence: 99%

Preparation of silicon‐modified antimicrobial polyethylene endotracheal tubes

Jiang

Shen

et al. 2015

J Biomed Mater Res

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“…It might be related to the change of surface roughness of the films after thermal aging. 19 It can be observed that the samples with high TiO 2 contents exhibit high DYI. Nakayama 25 pointed out that the reagent with a lone electron pair (oxygen atom in a molecule), like acetic acid, would bind the Lewis acid site (Ti + ) onto the surface of TiO 2 nanoparticle, and then a dipole layer was formed toward the inner layer of TiO 2 nanoparticle.…”

Section: Resultsmentioning

confidence: 96%

“…The third stage is a sharp decomposition around 400°C caused by the carbonization of organic compounds including phenyl. 19 The decomposition temperature decreased with higher Ti contents in the silica sol. Tao et al 24 pointed out that ZrO 2 nanoparticles in polymer matrix can disrupted the network of polymer which lead to decomposition of hybrid materials.…”

Section: Resultsmentioning

confidence: 97%

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Highly transparent thermal stable silicone/titania hybrids with high refractive index for LED encapsulation

et al. 2015

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Silicone/titania hybrids for LED encapsulation were synthesized via hydrolysis and condensation reaction between tetrabutyl titanate and silica sol containing phenyl groups and long alkyl chains. Crack-free thick films ($1 mm) were fabricated by curtain painting. The hybrid films with different Ti contents were characterized by FTIR, UV-VIS, TGA/ DSC, AFM, TEM, ellipsometer, etc. Results show that the hybrid films contain long alkyl chains which have high thermal stability against yellowing owing to the steric hindrance given by long alkyl chains. The hybrid films have high transmittance ( ‡98% in visible range) and high refractive index (1.591-1.681). In LED encapsulation, the silicone/titania hybrids with an RI of 1.605 increased the light extraction efficiency of bare blue LEDs by 19.4%.

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“…However, there is less research for silicone materials. Silicone materials contain many kinds of active group and present excellent cohesiveness and film-processing property [12]. The hydrophobic groups of Si-CH 3 and -CH 3 could reduce coating surface energy and improve chemical inertness.…”

Section: Introductionmentioning

confidence: 99%

Preparation of the Silicone-Modified Antimicrobial Polyethylene Endotracheal Tube (PE ETT)

LV¹

2014

J Med Microb Diagn

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Polyethylene endotracheal tube (PE ETT) antimicrobial coating has been proved to be a more effective method to prevent endoluminal biofilm formation. A transparent silicone-modified antimicrobial PE ETT was obtained by coating SiO 2 /KH570/MTES/Ag-SiO 2 solution prepared by chemical mixing Ag-SiO 2 and SiO 2 /KH570/MTES solution by means of dip-coating method, followed by drying. All the films were characterized by various techniques including Pencil Hardness Tester, IR, SEM, UV-vis, and ICP-MS. The results indicated that the TEOS/KH570/MTES/Ag-SiO 2 (15:6:1:0.6~1.0) films, which exhibit the simple solution-processable film formation on PE ETT, show homogeneous morphology, and have the high transmittance of above 87%, high hardness of 5H, strong adhesion. Furthermore, the silicone-modified antimicrobial PE ETTs show excellent antimicrobial property with the sterilization rate up to 93.5%, it demonstrates that the antimicrobial films have excellent biocompatibility and potent antimicrobial activity against protein adhesion. Pyrogen test, hemolysis test and oral mucous irritation test results are fit for biosecurity use requirement for biological materials. So, silicone-modified antimicrobial PE ETT is hoped to be used in the field of medical materials and can be used as an efficient and economical method to extend the service life of the PE ETT.

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Sol–gel derived titania hybrid thin films with high refractive index

Cited by 23 publications

References 23 publications

Preparation of silicon‐modified antimicrobial polyethylene endotracheal tubes

Preparation of silicon‐modified antimicrobial polyethylene endotracheal tubes

Highly transparent thermal stable silicone/titania hybrids with high refractive index for LED encapsulation

Preparation of the Silicone-Modified Antimicrobial Polyethylene Endotracheal Tube (PE ETT)

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