In situ method for preparing modified Nano powder of hydrate, hydroxy salt, and oxide
A hydroxide and in-situ preparation technology, which is applied in the treatment of dyed polymer organic compounds, etc., can solve the problems of in-situ modification of the surface of nanoparticles by modifiers, discount of modification effect, and complicated work, etc., and achieve convenient recycling and repeated use, prevention of particle growth, good dispersion effect
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example 1
[0015] Example 1, the MgCl of 10ml 5mol / L 2 Slowly add the solution dropwise to 100ml of 1mol / L NaOH solution, stir well, and carry out precipitation reaction at 40°C. After the reaction, filter and wash the filter cake until the filtrate is washed with 0.1mol / LAgNO 3 solution until no chloride ions can be detected. Then add the filter cake directly into 10ml of n-butanol, after the ultrasonic dispersion is uniform, then add 0.5g of stearic acid to continue ultrasonic dissolution until a uniform system is formed, then start azeotropic distillation until all the liquid in the system is evaporated So far, the surface modified stearic acid nano Mg(OH) 2 particle.
[0016] Stearic acid modified nano Mg(OH) 2 The performance parameters of the particles are as follows:
[0017] Stearic Acid Surface Modification Nano Mg(OH) 2 The infrared spectrum of the particles is shown in figure 1 (AVATAR360FT-IR infrared spectrometer test), in the figure a is the nano Mg(OH) prepared by th...
example 2
[0020] Example 2, to 100ml 2mol / L La(NO 3 ) 3 Add 0.5g of polyethylene glycol 4000 to the solution and stir magnetically to form a transparent solution. While stirring electromagnetically, add 5ml of 25-28% ammonia solution dropwise to form a gelatinous La(OH) 3 precipitation. The reaction was carried out at 80°C for 2 hours, then left overnight, filtered, and the precipitate was washed, then the filter cake was directly added to 10ml of n-butanol, and after ultrasonic dispersion was uniform, 0.5ml of oleic acid was added to continue ultrasonic dispersion until After forming a uniform system, start azeotropic distillation, first reflux for 30 minutes, and then distill all the liquid in the system to obtain surface-modified oleic acid nano La(OH) 3 particle.
example 3
[0021] Example 3, 10ml of 25-28% ammonia solution was added dropwise in the mixed solution of 80ml of water, 50ml of acetone and 20ml of ethanol, and stirred until the solution was transparent. 10ml of 1mol / L BaCl 2 The solution was slowly added dropwise to the above mixture under strong stirring, and reacted at 75°C for 8 hours. 3 Until no chloride ion can be detected in the solution, then directly add the filter cake into 10ml of n-butanol, after the ultrasonic dispersion is uniform, then add 0.5ml of decanoic acid and continue ultrasonic dissolution until a uniform system is formed, then start azeotropic distillation until All the liquid in the system is distilled off to obtain nano-Ba(OH) surface-modified capric acid 2 particle.
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