In this study, chemical modification of MCM-41 mesoporous structure with {3-(2-aminoethylamino) propyl} trimetoxysilane was used as adsorbent for removal of Rhodamine B and Yellow 13. Adsorbent proficiency in removal of basic dyes was studied with parameters such as sorbent mass, pH, contact time and temperature. The results showed that as sorbent mass in 1-6 mg, contact time in 10-60 min, temperature in 25-65 º C increased; removal of dyes increased in 60-100% in values. Optimal conditions were determined as sorbent mass in 6 mg, contact time in 60 min, temperature in 60 º C and pH value in 4 and 8 for Rhodamine B and Yellow 13, respectively. Then, its application was investigated on removal of Rhodamine B and Yellow 13 from pharmacy and textile wastes, respectively. The maximum removal values of Rhodamine B and Yellow 13 in wastes using modified MCM-41 were 97. 63 and 96. 11%, respectively.

Flexographic printing is the most applicable technology in the packaging industry. But the lack of proper adhesion of water-based ink on cardboard coated with polyethylene is one of the most important problems. Silane adhesion promoters are considered among the best compounds used as the crosslinking and waterproofing agents in coating and ink industries. In this study, N-(2-Aminoethyl) (3-aminopropyl) methyldimethoxysilane and 2-(3, 4-Epoxycyclohexyl) ethyl trie thoxy silane were used to improve the adhesion of water-based ink on paper board-coated with polyethylene. Results showed that highest degree of adhesion was achieved by adding 5% of N-(2-Aminoethyl) (3-aminopropyl) methyldimethoxysilane to ink. Adding silane compounds to ink formulation increased the contact angle of the ink film on the surface of cardboard coated with polyethylene which means that inks containing silane compounds act more successful in the formation of hydrophobic surface. It is worth noting that surface tension was decreased by addition of silane components to the formulation of the ink.

In this study, chemically modified MCM-41 mesoporous structure was used as adsorbent for removal of Rhodamine B and Yellow 13. In the step stage, chemical modification carried out using N-(2-aminoethyl(-3-aminopropyltrimethoxysilane and in the next stage with pyridine carbaldehyde. Therefore, surface of MCM-41 mesoporous has amino-and pyridine-groups that its performance as adsorbent has been increased. Removal proficiency was studied with parameters such as sorbent mass, pH, contact time, and temperature. Sorbent mass in 1-8 mg, pH in 2-10, contact time in 10-120 min, temperature in 25-65 º C variable. The results showed that as sorbent mass in 1-6 mg, contact time in 10-90 min, and temperature in 25-65 º C increased, removal of dyes increased in 60-100% in values. Optimal conditions were determined as sorbent mass in 5 mg, contact time in 90 min, temperature in 55 and 65 ° C, and pH value in 5 and 8 for Rhodamine B and Yellow 13, respectively. After determination of optimal conditions, its application was investigated on removal of Rhodamine B and Yellow 13 from pharmacy and textile wastes, respectively. The maximum removal values of Rhodamine B and Yellow 13 in wastes using modified MCM-41 were 97. 15 and 95. 55%, respectively.

The effect of nano SiO2 and silane coupling agents on practical properties of plywood was investigated. After plywood production with layers of hornbeam wood (Carpinus betulus), physical and mechanical properties were analyzed. Variables were the type of silane coupling agent (vinyl tri methoxy silane and g-amino propyl tri ethoxy silane), the amount of nano SiO2 (1% and 2%) and the amount of silane coupling agent (1% and 2%). The lowest water absorption and thickness swelling were observed in the case of boards produced with 1% treated nano SiO2 by 2% vinyl tri methoxy silane, and those with 1% treated nano SiO2 by 2% g-amino propyl tri ethoxy silane had the highest bending strength and modulus of elasticity. The highest shear strength was found for the boards produced with 2% nano SiO2 treated by 1% vinyl tri methoxy silane. The results of this study revealed that utilization of nano SiO2 treated by silane coupling agent as filler for urea formaldehyde resin is effective in improving the physical and mechanical properties of plywood.

Ethylene vinyl alcohol (EVOH) copolymer is of semi crystalline materials with excellent barrier properties to gases. Also, it has shown outstanding chemical resistance. Despite its low gas permeability, EVOH copolymer displays poor water and water vapor resistance. In this study, Trimethoxymethylsilane (as hydrophobic coating) was deposited by Plasma Enhanced Chemical Vapor (PECVD) method on the coated paper with Ethylene vinyl alcohol in order to improve the paper's barrier properties of moisture transmission. Coating by PECVD method was done in the certain conditions of time 6 min, pressure 300 m Torr, power including 50, 70 and 90W. Then contact angle was measured in order to determined improvement of the paper's barrier properties of moisture transmission. The result showed that papers which were coated with Trimethoxymethylsilane had higher contact angle water 55. 7% more than the control. The results revealed that the best condition was obtained by 50 W power. The structural and chemical properties of deposited layer were observed with Fourier Transform infrared spectroscopy-Attenuated Total Reflectance (FTIR-ATR) and Energy Dispersive X-ray Spectroscopy (EDS). The results confirmed bonding of silane on the surface EVOH polymer.

In this work, the effects of methacryloxypropyltrimethoxy silane (MPTMS) molar ratio, reaction’s pH and time, and water amount on the surface modification of fumed silica nanoparticles were studied. Possible interactions between the silane coupling agent and the functional groups on the surface of the silica nanoparticles were studied using Fourier Transform Infrared (FTIR) spectroscopy. The grafting of MPS compounds on the nanoparticles surface was characterized using Thermo Gravimetric Analysis (TGA) technique. Then untreated (PSB-Si) and treated (PSB-MPS) fumed silica nanoparticles were included into the styrene: butyl acrylate wt. % ratio of 1:1 emulsion latex, throughout in-situ polymerization method. The synthesized latex samples were characterized using; FTIR and Laser Light Scattering (LLS) techniques. The results of characterization studies revealed the chemical interactions of silane compounds with silica nanoparticles with about 32 wt. % grafting. The silane and water amount, reaction time and pH, have significant effect on the nanoparticles grafting as a result of higher silane hydrolysis. The result of LLS and FTIR studies indicated that the polymerization reaction performed successfully and the inclusion of either untreated or treated nanoparticles has a main effect on the latex particles size. J. Color Sci. Tech. 7(2013), 37-46© Institute for Color Science and Technology.

In this study, the two novel modified structures of MCM-41 with furan ring were synthesized for the removal of Cu(II) ions from water. These novel adsorbents were synthesized by amination of MCM-41 using 3-Amino-propyltrimethoxy-silane and 3-(2-aminoethylamino) propyltrimethoxy-silane in the first step, and then using a furfural compound And the condensation reaction, the MCM-41 modified with furan groups, abbreviated as MCM-41@NO and MCM-41@N2O. Characterization and investigation of the adsorbent structure was performed using XRD, FT-IR, and BET. The concentration of soluble ions with Flame Atomic Absorption Spectrometry (FAAS) was determined. The adsorbent efficiency in removing copper ions was studied by examining variables such as adsorbent dose, pH, contact time, and soluble temperature. The equilibrium of adsorption of both absorbents fits into the Freundlich isotherm model. The kinetics study of adsorption shows the second order of kinetics for both absorbents. The study of the adsorption of Cu2+(aq) on the MCM-41@NO by using Monte Carlo molecular mechanics is the innovation of this work. The results of these calculations are compared to experimental results. The results of calculations show that the Cu2+ ions at 1. 63Å,from the surface of absorbent with 0. 75 kcal/mol energy have the maximum probability of distribution.

In this study, the effect of an adhesion promoter was investigated on the adhesion of an epoxy silicone coating. N-2 amino ethyl- 3 amino propyl-3 methoxy silane was used as an adhesion promoter and was incorporated into the epoxy clear coat. The effect of the additive, using a sol-gel process on the final properties of the coating was investigated by adhesion, hardness (Vickers) and tensile measurements and DMTA analysis. The results indicated an increase in the coating adhesion in the presence of amino silane as compared to that of epoxy silicone resin. This is due to the formation of chemical bridges as a result of covalent bonding between silanols and hydroxyls at the surface. On the other hand, the formation of a three-dimensional siloxane network in the condensation process of silanols resulted in a higher crosslink density of the system and a denser network. The results showed that the use of amino silane compounds in epoxy silicone coatings can be an effective way to increase the adhesion.

In this research, insoluble poly (3-mercaptopropylsiloxane) was prepared by hydrolyzing mixture of tetraethoxysilane (TEOS) with 3-mercaptopropyl trimethoxysilane (MPTS) in the presence of a tin catalyst. Many products were pre pared using different mole ratios of TEOS to MPTS (i.e., 5:1, 2:1, 1:1, 1:2, and 1:5).The best mole ratio, which gives the highest metal uptake for the ligand was chosen for further evaluation. Then, the capability of this ligand in extraction of heavy metal ions (i.e., Pb 2+,Cu 2+,Ni 2+,Zn 2+,Hg 2+,and Cd 2+) from their solutions was determined at different pHs (2 ≤ pH ≤ 8). Atomic absorption and complexometric titrations were used for determination of metal content in metal ion solution.