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.

scholarly journals Effect of Silane Coupling Treatment on the Adhesion between Polyamide and Epoxy Based Composites Reinforced with Carbon Fibers

Fibers ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 48
Author(s):  
Vincenzo Fiore ◽  
Vincenzo Orlando ◽  
Carmelo Sanfilippo ◽  
Dionisio Badagliacco ◽  
Antonino Valenza
Keyword(s):  
Carbon Fibers ◽  
Spray Deposition ◽  
Mechanical Tests ◽  
Polymer Materials ◽  
Tensile Failure ◽  
Coupling Agents ◽  
Fiber Reinforced ◽  
Silane Coupling Agents ◽  
Curing Conditions ◽  
Silane Coupling

The increasing efforts aimed to design structures with reduced weight and better mechanical performances has led in recent years to a growing use of fiber reinforced polymer materials in several fields such as marine. However, these materials can be composed of chemically very different elements and, hence, may be difficult to joint. This research aims to improve the adhesion between a thermoplastic matrix of polyamide reinforced with short carbon fibers (PA12-CR) and a carbon fiber reinforced epoxy matrix (CFRP). Two different silane coupling agents, (3-Aminopropyl)trimethoxysilane (AM) and (3-Glycidyloxypropyl)trimethoxysilane (EP), were applied, through the spray deposition method, on the PA12-CR substrate to create a reactive layer between the adherents. Different deposition methods and coupling agents curing conditions were also investigated. The wettability of the PA12-CR surface as well as the chemical modifications induced by silane treatments were investigated through contact angle and Fourier Transform Infrared spectroscopy (FTIR) analyses. Furthermore, the interfacial adhesion between PA12-CR and CFRP substrates was evaluated through Mode I delamination tests (DCB). The effectiveness of the most promising treatment was finally verified on sandwich structures, having PA12-CR printed as internal core and CFRP laminates as external skins, through quasi-static three-point bending mechanical tests. Overall, the epoxy-based silane (EP) allowed significantly better resistance to the delamination up until the tensile failure of the CFRP substrate.

Surface Functionalization of Zirconia Nanocrystals with Silane Coupling Agent and its Dispersion Behavior in O-Phenylphenoxyethyl Acrylate

2018 ◽  
Vol 922 ◽  
pp. 20-25 ◽  
Author(s):  
Hee Seon Lee ◽  
Jeong Min Park ◽  
Kyu Hong Hwang ◽  
Hyung Mi Lim
Keyword(s):  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Coupling Agents ◽  
Solvothermal Reaction ◽  
Silane Coupling Agents ◽  
Propyl Methacrylate ◽  
Silane Coupling ◽  
Ft Ir ◽  
Surface Modified ◽  
Dispersion Of Nanoparticles

Highly crystalline and dispersible zirconia, synthesized by solvothermal reaction of zirconium (IV) isopropoxide isopropanol complex in benzyl alcohol, were functionalized with silane coupling agent and dispersed with o-phenylphenoxyethyl acrylate (OPPEA). Silane coupling agents such as 3-aminopropyltriethoxysilane (APTES) of amino functional silane, decyltrimethoxysilane (DTMS) of alkyl functional silane and 3-(trimethoxysilyl) propyl methacrylate (MPS) of acrylate functional silane have been used to modify nanoparticle surfaces and obtain dispersion of nanoparticles within OPPEA. The surface modified zirconia was compared according to silane coupling agent, FT-IR and TGA demonstrated that APTES, DMTS and MPS are chemically attached to the surface of the zirconia. The MPS-zirconia is dispersed as about 5 nm sized, whereas the APTES-zirconia, DTMS-zirconia are agglomerated. The MPS-zirconia/tetrahydrofuran (THF) sol at 15wt% loading shows high transmittance of 68 % at 550 cm-1 and the 50wt% surface modified-zirconia/OPPEA sol show refractive index of 1.657.

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.

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.

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