scholarly journals Characterization of TiO2 surface following the modification with silane coupling agents

2007 ◽  
Vol 9 (4) ◽  
pp. 72-76 ◽  
Author(s):  
Teofil Jesionowski ◽  
Katarzyna Siwińska-Stefańska ◽  
Andrzej Krysztafkiewicz ◽  
Jadwiga Sójka-Ledakowicz ◽  
Joanna Koprowska ◽  
...  
Keyword(s):  
Particle Size ◽  
Coupling Agents ◽  
Tio2 Surface ◽  
Silane Coupling Agents ◽  
Surface Areas ◽  
Silane Coupling ◽  
Specific Surface Areas ◽  
Titanium White ◽  
Modification Of Titanium

Characterization of TiO2 surface following the modification with silane coupling agents Studies were conducted on the modification of titanium white surface using selected silane coupling agents. The effect of the concentration of the organic coupling agents was examined (0.5; 1 or 3 weight parts per 100 weight parts of TYTANPOL R-003, TYTANPOL R-211 or TYTANPOL R-213 preparation of titanium white). The dispersive properties were determined by an estimation of the particle size distribution curves and of the polydispersity index. Moreover, microscopic observations were conducted permitting to evaluate the surface morphology of the modified TiO2 particles. The profiles of sedimentation in water were also determined for the titanium whites and the BET specific surface areas were determined. Selected samples of the modified and unmodified titanium whites were subjected to elemental analysis.

scholarly journals Influence of modification of titanium dioxide by silane coupling agents on the photocatalytic activity and stability

2020 ◽  
Vol 8 (4) ◽  
pp. 103917 ◽  
Author(s):  
Agnieszka Wanag ◽  
Agnieszka Sienkiewicz ◽  
Paulina Rokicka-Konieczna ◽  
Ewelina Kusiak-Nejman ◽  
Antoni W. Morawski
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Coupling Agents ◽  
Silane Coupling Agents ◽  
Silane Coupling ◽  
Modification Of Titanium

The Characterization of Silicon Powder Modified by Silane Coupling Agent and its Effect

2014 ◽  
Vol 1048 ◽  
pp. 460-464
Author(s):  
Dong Dong Zhang ◽  
Shao Guo Wen ◽  
Ji Hu Wang ◽  
Peng Zhu Wang
Keyword(s):  
Silicon Powder ◽  
Polymer Materials ◽  
Coupling Agents ◽  
Silane Coupling Agents ◽  
Hydrophobic Property ◽  
Modification Effect ◽  
Silane Coupling ◽  
Ft Ir ◽  
The Cost

Silicon powder is a kind of important nonmetallic mineral. It not only reduce the cost of polymer materials, but also can improve the performance of materials. In order to make silicon powder play a better role, this paper shows that surface modification of silicon powder by using the silane coupling agents KH550 and KH560. Through hydrophobic property, infiltrating performance, activation index, infrared spectroscopy(FT-IR) and scanning electron microscopy (SEM).It can be find that the evaluation and characterization of silicon powder modification effect. Comprehensive analysis shows that the modification effect is best,when KH550 and KH560 is the ratio of 1:2.

Preparation of Polymer Microspheres Using Silane Coupling Agent Modified Nano-SiO2 as Single Stabilizer

2011 ◽  
Vol 341-342 ◽  
pp. 247-251 ◽  
Author(s):  
Guang Hui Ma ◽  
Fa Ai Zhang ◽  
Chang Sheng Gu
Keyword(s):  
Silica Nanoparticles ◽  
Average Particle Size ◽  
Optical Microscope ◽  
Coupling Agents ◽  
Average Particle ◽  
Silane Coupling Agents ◽  
Pickering Emulsion Polymerization ◽  
Silane Coupling ◽  
Unmodified Silica

This paper demonstrates that silica nanoparticles were modified by the four silane coupling agents (KH-151, KH-550, KH-560, KH-570) firstly, then polystyrene/silica (PS/SiO2) composite microsphere with PS core and silica nanoparticles shell were prepared by Pickering emulsion polymerization. The characterization of optical microscope (OM), scanning electron microscope (SEM), and thermogravimetic analysis ( TGA) illustrates that these microsphere are composed of PS and silica nanoparticles. Silica nanoparticles modified by the different silane coupling agents could form the stable PS/SiO2 microsphere over 70 °C, while the unmodified silica nanoparticles are difficult to form stable PS/SiO2 microspheres at the same temperature. The PS/KH-151-SiO2 microsphere exhibits the least average particle size, while the PS/KH-570-SiO2 microsphere produces the largest. Both SEM and TGA confirm that microsphere surface exists solid nanoparticles.

Preparation and Characterization of TiO2 Nanowires Modified Organically with Coupling Agents

2021 ◽  
Vol 21 (9) ◽  
pp. 4870-4876
Author(s):  
Xiaohui Wang ◽  
Yan Chen ◽  
Tongtong Wang ◽  
Wenchang Zhuang ◽  
Jun Zhou
Keyword(s):  
Ph Value ◽  
Coupling Agents ◽  
Hydroxyl Number ◽  
Silane Coupling Agents ◽  
Tio2 Nanowires ◽  
One Dimensional ◽  
Surface Hydroxyl ◽  
Static Contact ◽  
Silane Coupling

Anatase-type one-dimensional TiO2 nanowire was prepared by hydrothermal method. The nanowires were modified by three kinds of silane coupling agents, such as KH550, KH560 and KH570. Flocculation was caused when the amount of modifier reached a certain level. When KH570 was used at 3.0 percent, at 80 °C, 4 h, and pH value between 9 and 10, modified nanowires had the highest 56.5 percent lipophilization degree, the lowest 0.562 per/nm2 surface hydroxyl number, and the maximal 121.2° static contact angle.

Study on Environment-Friendly Epoxy Emulsion Modified by Two Silane Coupling Agents

2011 ◽  
Vol 347-353 ◽  
pp. 858-861 ◽  
Author(s):  
Wen Lu Guo ◽  
Han Qing Lu ◽  
Hong Chun Zhou ◽  
Wei Hu
Keyword(s):  
Particle Size ◽  
Average Particle Size ◽  
Coupling Agents ◽  
Average Particle ◽  
Nano Particle ◽  
Silane Coupling Agents ◽  
Environment Friendly ◽  
Particle Size Analyzer ◽  
Silane Coupling ◽  
Epoxy Emulsion

The environment-friendly epoxy emulsion was synthesized by MAA, BA, St reacting as grafting monomer, while silane coupling agents played a role as functional monomer. Experimental results were characterized by Nano-particle size analyzer, EIS, UV-VIS spectrophotometer, FTIR and TGA. The results of Nano-particle size analyzer showed the average particle size lower than 300nm and emulsion had lowest water absorption when ω(KH560+KH550) was 7%. The results of EIS and UV-VIS spectrum showed the cured firm had the best corrosion resistance and weather resistance while n(KH560):n(KH550)=2:1. The results of FTIR showed the silane coupling agents had successfully grafted in the skeletal structure of epoxy molecules. The results of TGA showed the thermal stability were better than unmodified.

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