Papers by Keyword: Benzotriazole

Abstract: The mesoporous silica nanoparticle (MSN) is a material with easily controllable pore size and excellent surface area to develop into a corrosion inhibitor nanocarrier, a protective coating specially produced by a nanocomposite layer to keep or release anticorrosive active compounds. Nonetheless, the MSN is not weakness-free, which cannot impede corrosion propagation actively. Special treatment for overcoming is developing the benzotriazole-silver (BTA-Ag)-based capping system, with advantages that can exploit the double anticorrosive mechanism by adjusting anticorrosive active compound release while capturing chloride ions, leading to active self-healing. Therefore, this work identifies the effect of developing a capping system based on BTA-Ag on the porosity properties of MSN as an initial step in preparing corrosion inhibitor nanocarrier. Rice husks were chosen as eco-friendly materials to replace commercial precursors because of their abundance, the same orthosilicate structure, and the high purity of silica. With excellent levels of safety and uniformity, this work uses the sol-gel method to reduce the synthesis energy or cost. The outcome indicates that the porosity characteristics of these nanoparticles are significantly impacted by the BTA-Ag-based capping method. The pore size shrank to 2.5 nm from 2.6 nm. Additionally, the surface area decreased dramatically from 653.149 to 41.725 m²/g. Moreover, the pore volume dropped from 0.9 to 0.1 cm³/g. However, it had a comparable morphology, varied in size, and a specific aggregation level, indicating the presence of densely packed rod-like micelles during the MSN synthesis. The sample was confirmed to be porous since the isotherm graph was of type IV. It was highly reactive due to silanol and siloxane groups, signaling bonds with the silica matrix being the main component.

Abstract: This work identifies the effect of loading benzotriazole (BTA) on mesoporous silica nanoparticles (MSN) as an initial step in preparing a self-healing corrosion-protective coating with environmentally friendly precursors, rice husk, which advantages cheaper, renewable, and contains relatively high silica. This research uses the sol-gel method to synthesize MSN. Based on the result, it is known that the loading of BTA strongly affects the porosity properties of these nanoparticles. The pore sizes increase as the surface areas and pore volumes decrease. However, the silicone composition shrinks. Based on pore size, it is known that all the samples in this work were mesoporous materials (over 2 nm) with spherical and globular morphologies (like coral reefs).

Abstract: A systematic study of the adsorption of benzotriazole on Co surface and its removal in aqueous solutions was carried out for post-CMP cleaning application. Static etch rate (SER) measurements and electrochemical impedance spectroscopy (EIS) were employed. The experimental results show that BTA adsorbed well on Co surface when it exposed to BTA solution at neutral and alkaline pH. BTA did not adsorb due to active Co dissolution at acidic pH. The effect of dissolved oxygen (DO) concentration in de-ionized (DI) water on the removal of Co-BTA complex layer was investigated. At DI water rinse process after BTA treatment, Co-BTA layer was maintained on Co surface when DO concentration of DI water was low. Interestingly, BTA was removed by DI water with high DO concentration.

Abstract: This project investigated the tribological properties and nanomechanics of Cu-benzotriazole (BTA) composite nanooils. Cu-BTA nanoparticles were synthesized by a thermal decomposition process. Cu-BTA nanoparticles were added into paraffin oil to form the nanooils. Cu-BTA explores the nanomechanics of sphere geometry functions as a rolling medium for friction lower. BTA nanoparticles functions as a protector from oxidation of the Cu nanoparticles in various test circumstances. Tribological experiments were conducted using a pin-on-disk (ASTM G99) test for the wear scar diameter, friction coefficient, and morphology of worn surfaces. The experiment results revealed the dispersion capability of the benzotriazole-capped Cu nanoparticles and indicated the dispersing stability in liquid paraffin oil for the BTA-capped surface of Cu nanoparticles. The testing results show that the Cu-BTA nanoparticle used as an additive in paraffin oil at an appropriate concentration exhibits better tribological properties than those of pure paraffin oil. Cu-BTA functioning as an additives have different anti-wear abilities due to its small size effect and a high absolute viscosity given high Herser number, corresponds to relatively thick lubricant film and an larged elastohydrodynamic lubrication area. A thin film or powder consisting of spherical Cu-BTA nanoparticles on pin-on-disk (ASTM G99) test iron surface protests against damage from relative rolling movement, which reduces friction and wear.

Abstract: A novel fluorine-containing ultraviolet absorber (FBTA) based on the parent molecule 2-(2,4–dihydroxyphenyl)-2H-benzotriazol (BTA) was synthesized and characterized by ¹HNMR, FTIR, and MS. UV absorption of FBTA was studied in 10^-4 M dichloromethane (CH₂Cl₂), and the results suggested that FBTA possessed similar UV absorption capability with BTA.

Abstract: This paper shows effective removal of copper from water and industrial wastewater by modified magnetic nanoparticle with benzotriazole as an efficient adsorbent. The method is fast, simple, cheap, effective and safe for treatment of copper polluted waters. Non-modified magnetic iron oxide nanoparticles (MIONPs) can adsorb up to 49.6% of 50 ng ml^-1 of Cu (ΙΙ) ions from polluted water, but modified magnetic nanoparticles improved the efficiency up to 99.7% for same concentration. The required time for complete removal of copper ions was 5 minutes. Variation of pH and high electrolyte concentration (NaCl) of the solution do not have considerable effect on the copper removal efficiency.

Abstract: In the present research, a sizing agent containing benzotriazole UV absorber was used as coating to enhance the UV stability of PBO fibers. The sizing coating was characterized by XPS and SEM. The effect of UV absorber on UV stability of PBO fibers was studied by an accelerated photo-aging method. The experimental results show that UV stability of coated PBO fibers was obviously improved compare to uncoated PBO fibers. After 480 h of UV exposure, the tensile strength retention and intrinsic viscosity retention of coated PBO fibers was higher than that of original PBO fibers. SEM photograph shows that no significant change of surface morphologies, meanwhile some latitudinal crack appeared on the original PBO fiber surface.

Abstract: Based on neutral salt spray test and variance analysis, the RE salt compound using in the corrosion inhibitors of copper alloy has been studied. Synergistic effects among the RE salt, benzotriazole and sulfosalicylic acid were conducted through two orthogonal experiments. The results shows that the passive film has a better corrosion resistance after added RE salt,the synergistic effect is obvious in combined copper corrosion inhibitor.

Abstract: The use of integration of copper interconnects in semiconductor devices has greatly advanced the development of integrated circuits and has enabled ever higher device densities. Unfortunately the oxides of copper are poorly suited to semiconductor manufacture. As Cu (I) and Cu (II) oxides are not self-limiting they can pose serious issues from a cleaning and queue time management perspective. In both post-etch and post-CMP cleaning applications it is critical that both types of Cu oxide are removed without damage to either Cu or the dielectric. With the most advanced sub 32nm nodes simply removing the oxides is not sufficient; their re-growth must also be prevented using surface passivation.

Abstract: Conversion coatings on commercial brass were prepared with lanthanum salt (La(NO₃)₃) and benzotriazole (BTAH) as reagents. A “Critical La(NO₃)₃ content” and “Critical BTAH content” were both observed, at which the coatings prepared performs the highest protectiveness.The results showed that La(NO₃)₃ and BTAH had an excellent synergism effect on the corrosion inhibition of brass. A remarkable enhancement of the brass’s corrosion protection was obtained by the formation of conversion coatings consisted of Cu₂O, La₂O₃, Cu(I)BTA and La-complex, which acted as a barrier avoiding the release of metal ions and inhibited the diffusion of the oxygen.