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.

Synthesis of Substrate-bound Seaweed-like Au Nanowires with Amino Silane Coupling Agents

2022 ◽  
Author(s):  
Jialong Yu ◽  
Weiyu Wang ◽  
Shumin Li ◽  
Beibei Yu ◽  
Hongyu Chen ◽  
...  
Keyword(s):  
Coupling Agent ◽  
Active Surface ◽  
Coupling Agents ◽  
Silane Coupling Agents ◽  
One Dimensional ◽  
Amino Silane ◽  
Silane Coupling ◽  
Dimensional Growth ◽  
Au Nanowires

Seaweed-like Au nanowires were synthesized without any nanoparticle seeds. The amino silcane coupling agent 3-aminopropyltriethoxysilane was used to form the active surface on Au substrate to facilitate one dimensional growth....

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 Electroless Silver Plating on PAN Fiber with Chelating Agent of APTES/MPTES

2013 ◽  
Vol 641-642 ◽  
pp. 464-468
Author(s):  
Peng Peng Xu ◽  
Dan Yu ◽  
Chao Wang ◽  
Ting Ting Wang ◽  
Wei Wang
Keyword(s):  
Chelating Agent ◽  
Coupling Agents ◽  
Silver Layer ◽  
Silane Coupling Agents ◽  
Pan Fiber ◽  
Structure Morphology ◽  
Silane Coupling ◽  
Electroless Silver Plating ◽  
Chelating Effect

Modified by silane coupling agents APTES and MPTES, PAN fiber was provided with multi-chelating-group on it. Through the chelating effect, it can be directly used to eletroless silver plating without roughening, sensitization and activation. The molecule structure, morphology and thermal stability were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and therm-gravimetric (TG) analysis. In addition, electrical conductivity, and washing performance were also tested respectively. The results indicated that silver-coated PAN fiber based on APTES/MPTES modification had high conductivity with a compact and homogeneous silver layer, as well as good washing fastness performance.

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.

Functionalization of Porous Clay Heterostructures with Silane Coupling Agents

2017 ◽  
Vol 54 (2) ◽  
pp. 341-344
Author(s):  
Anda Ionelia Mihai (Voicu) ◽  
Sorina Alexandra Garea ◽  
Eugeniu Vasile ◽  
Cristina Lavinia Nistor ◽  
Horia Iovu
Keyword(s):  
Pore Volume ◽  
Total Pore Volume ◽  
Coupling Agents ◽  
Silane Coupling Agents ◽  
Porous Clay Heterostructures ◽  
Bet Analysis ◽  
Silane Coupling ◽  
Ftir Spectrometry ◽  
Textural Parameters ◽  
Epoxy Groups

The goal of this paper was to study the modification of porous clay heterostructures (PCHs) with various silane coupling agents. Two commercial coupling agents (3-aminopropyl-triethoxysilane (APTES) and 3-glycidoxypropyl-trimethoxysilane (GPTMS)) with different functional groups (amine and epoxy groups) were used as modifying agents for the PCHs functionalization. The functionalization of PCH with APTES and GPTMS was evaluated by Fourier transform infrared (FTIR) spectrometry, thermogravimetric analysis (TGA), X-Ray Diffractions (XRD) and BET Analysis. FTIR spectra of modified PCHs confirmed the presence of characteristic peaks of silane coupling agents. TGA results highlighted an increase of weight loss for the modified PCHs that was assigned to the degradation of silane coupling agents (APTES and GPTMS) attached to the PCHs. The XRD results showed that the structure of modified PCHs was influenced by the type of the silane coupling agent. The functionalization of PCHs with silane coupling agents was also confirmed by BET analysis. Textural parameters (specific surface area (SBET), total pore volume (Vt )) suggested that the modified PCHs exhibit lower values of SBET and a significant decrease of total pore volume than unmodified PCHs.

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