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Method of preparing nonstoichiometry doping rare earth element nano SiO2 composite particles

A non-stoichiometric, rare earth element technology, applied in the field of preparation of non-stoichiometric rare earth element-doped nano-SiO2 composite particles, can solve the problem of poor surface acidity, limited hydrophilic performance, strength, toughness and anti-compaction performance, Solve the problems of low hydrophilic performance, and achieve the effect of strong chemical durability, wide versatility, and high hydrophilic performance

Inactive Publication Date: 2007-10-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of use, the inorganic oxide used is a single component, its surface acidity is poor, and its hydrophilicity is low, which limits the hydrophilicity, strength, toughness and compression resistance of the polymer when it is filled with polymer-based polymers. real performance improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Dissolve 4ml of tetraethoxysilane in 15ml of absolute ethanol to prepare a solution, stir evenly at a speed of 2000r / min, and use it as liquid A, while adding 0.2g of nonionic surfactant fatty alcohol Polyoxyethylene ether (AEO9), mixed evenly; weighed 0.16g of lanthanum acetate, dissolved in 8ml of distilled water to prepare a solution, stirred evenly at a speed of 2000r / min, and used it as liquid B. Then mechanically stir at a speed of 3000r / min to completely mix liquid A and liquid B. At the same time, in an ultrasonic environment with a power of 80W, add ammonia water to adjust the pH of the solution to 8.1, reflux at 40°C for 5 hours to carry out alkaline hydrolysis to prepare a sol, and then keep it in a constant temperature drying oven at 60°C for 3 hours to form a gel. Adjust the temperature to 100°C and keep it at a constant temperature for 2 days, then dissolve the gel in 10 times the amount of n-butanol, azeotropically distill at 117°C for 1 hour t...

Embodiment 2

[0015] Example 2: Dissolve 8ml of tetraethoxysilane in 25ml of absolute ethanol to prepare a solution, stir evenly at a speed of 2000r / min, and use it as liquid A, while adding 0.3g of nonionic surfactant fatty alcohol Polyoxyethylene ether (AEO9), mixed evenly; weighed 0.15g of cerous chloride, dissolved in 16ml of distilled water to prepare a solution, stirred evenly at a speed of 2000r / min, and used it as liquid B. Then mechanically stir at a speed of 3000r / min to rapidly mix liquid A and liquid B. At the same time, drip ammonia water to adjust the pH of the solution to 8.5 in an ultrasonic environment of 80W, reflux at 45°C for 4.5 hours to carry out alkaline hydrolysis to prepare a sol, and then keep it in a constant temperature drying oven at 60°C for 4 hours to form a gel, and continue to adjust to Keep the temperature at 100°C for 2 days, then dissolve the gel in 8 times the amount of n-butanol, azeotropically distill at 117°C for 1 hour to remove the moisture in the g...

Embodiment 3

[0016] Example 3: Dissolve 4ml of tetraethoxysilane in 16ml of absolute ethanol to prepare a solution, stir evenly at a speed of 2000r / min, and use it as liquid A, while adding 0.22g of nonionic surfactant fatty alcohol Polyoxyethylene ether (AEO9), mixed evenly; weighed 0.18g of praseodymium carbonate, dissolved in 8ml of distilled water to prepare a solution, stirred evenly at a speed of 2000r / min, and used it as liquid B. Then mechanically stir at a speed of 3000r / min to rapidly mix liquid A and liquid B. At the same time, drip ammonia water to adjust the pH of the solution to 8.7 under an ultrasonic environment of 80W, and reflux at 50°C for 4 hours to carry out alkaline hydrolysis to prepare a sol, then keep it in a constant temperature drying oven at 65°C for 4 hours to form a gel, and continue to adjust to Keep the temperature at 100°C for 3 days, then dissolve the gel in 9 times the amount of n-butanol, azeotropically distill at 117°C for 1 hour to remove the moisture ...

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PUM

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Abstract

The invention discloses a preparing method for non-stoichiometric doped rare-earth element nano SiO2 compound particle belonging to SiO2 compound material. The method comprises following steps: having the organic silane and disposed rare-earth element inorganic salt before drying as monomer, respectively dissolving in the absolute ethyl alcohol and distilled water to produce respective precursor, uniformly mixing under the mechanical agitation, hydrolyzing under the ultrasonic environment having the ammonia as buffer in the alkaline condition, forming equal, stable, transparent sol, aging to obtain gel, gel dehydration by azeotropic distillation, then sintering in the retort furnace to get doped rare-earth element nano SiO2 compound particle without group lump. The invention has a simple process. The obtained doped rare-earth element nano SiO2 compound particle has a high mechanical strength, a strong hydrophilicity and a wide universality which is mainly used to produce filling material of the organic film, super strong sorbent, photoluminescence material.

Description

technical field [0001] The invention relates to a non-stoichiometric doped rare earth element nano-SiO 2 Preparation method of composite particles. Belongs to Nano SiO 2 Preparation technology of composite materials. Background technique [0002] The 21st century is an era of rapid development and wide application of new materials and advanced manufacturing technologies, and materials are one of the symbols of human evolution. As early as 1959, the famous physicist Richard Feynaman first proposed the idea of ​​molecularization of nanomaterials at the American Physics Annual Meeting. Based on this idea and with the improvement of the development of physics and the improvement of experimental observation technology, the preparation technology of nanomaterials It has gone deep into the manipulation of single atoms and the realization of molecular "surgery" through soft chemistry. However, how to realize the compounding and functionalization of materials when constructing mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/06
Inventor 张裕卿涂郑禹
Owner TIANJIN UNIV
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