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Organic Modification of Aluminum-coated Nano-TiO2 by Sodium Stearate

wallpapers News 2021-06-22
Organic Modification of Aluminum-coated Nano-TiO2 by Sodium Stearate
Sodium stearate was used to organically modify the surface of nano-TiO2 coated with alumina. Infrared spectroscopy (IR), thermal analysis (TG-DTA), high resolution transmission electron microscopy (HRTEM), wettability and dispersion were used Characterization of nano-TiO2 before and after surface modification. Infrared spectroscopy and thermal analysis showed that both alumina and sodium stearate were chemically bonded to the surface of nano-TiO2 and formed an organic coating layer. The measurement shows that the mass fraction of sodium stearate expressed by nano-TiO2 is about 9.1%. The wettability and dispersibility experiments show that the nano-TiO2 powder modified by the surface of alumina and sodium stearate has changed from hydrophilic to Lipophilic.
Synthesis and performance evaluation of α-sulfonated sodium stearate
Taking stearic acid as the main raw material, sulfonating stearic acid with concentrated sulfuric acid at 85°C, and reacting at a constant temperature for 6 hours to obtain α-sulfonated stearic acid. After purification with water/acetone, it is reacted with sodium hydroxide. A double hydrophilic anionic surfactant was obtained. The structure of the target was initially determined by infrared spectroscopy. The experiment showed that the CMC and γCMC of the target aqueous solution were lower than SDS, and it had higher surface activity; at the same time, it had good foaming and foam stabilization performance. It has theoretical significance and practical value.
It is an important aspect of the sustainable development of papermaking to study the properties of the filler itself and its modification to adapt to the requirements of the entire papermaking system. Therefore, the modification and functionalization of fillers has become a hot research field. This article uses starch-stearic acid. Sodium complex modified GCC, by controlling the modification conditions, starch-sodium stearate forms a layer-deposited film on the surface of GCC, which improves the strength of the filled paper while also increasing the retention rate of the filler. At the same strength index Next, the modified GCC filling can increase the ash content of the filled paper, which provides a reference for the theoretical research of modified fillers and the practical application of paper mills.

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Tag: stearate   Sodium