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Modified inorganic nano-particle as well as preparation method and use thereof

A technology for modifying inorganic nanoparticles, which is applied in the treatment of dyed polymer organic compounds, fibrous fillers, etc., can solve the problems of non-uniform dispersion of inorganic particles and poor compatibility, and achieve good industrial application prospects, low cost, and high efficiency. The effect of mechanical strength

Inactive Publication Date: 2008-08-27
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the above technologies, there are still inorganic particles, especially the poor compatibility between inorganic nanoparticles and polymer materials, and the shortcomings that inorganic particles cannot be uniformly dispersed in polymer materials, so it is still necessary to modify inorganic nanoparticles

Method used

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  • Modified inorganic nano-particle as well as preparation method and use thereof
  • Modified inorganic nano-particle as well as preparation method and use thereof
  • Modified inorganic nano-particle as well as preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, the preparation of modified nano-calcium carbonate particles

[0021] Take 2.7g of stearyl alcohol and add it to the reaction kettle, raise the temperature to 80°C to remove water by vacuuming, add 200ml of toluene and 2.5g of MDI in sequence, raise the temperature to 90°C, stir the reaction at high speed for 4 hours under the protection of nitrogen, then add 300ml of toluene and 100g of Dry nano-calcium carbonate, the average particle size of calcium carbonate is 100nm, continue to react for 4 hours, vacuum filter after the reaction, wash with toluene, dry, pulverize, and sieve to obtain modified nano-calcium carbonate particles.

[0022] Depend on figure 1 Infrared spectrum detection shows that, according to the modified nano-calcium carbonate particle prepared by the above-mentioned method, at 2900cm -1 There are stretching vibration absorption peaks of methylene on the left and right, at 2240cm -1 There are no absorption peaks of isocyanate groups on...

Embodiment 2

[0023] Embodiment 2, the preparation of modified nano silica particles

[0024] Take 2.7g of stearyl alcohol and add it to the reaction kettle, raise the temperature to 80°C to remove water by vacuuming, add 200ml of toluene and 2.5g of MDI in sequence, raise the temperature to 85°C, stir and react at high speed under nitrogen protection for 5h, then add 800ml of toluene and 50g of Dry nano-silica, the average particle size of the silica is 50nm, continue to react for 5 hours, vacuum filter after the reaction, wash with toluene, dry, pulverize, and sieve to obtain modified nano-silica particles.

Embodiment 3

[0025] Embodiment 3, the preparation of modified nano silica particles

[0026] Take 2.42g of cetyl alcohol and add it to the reaction kettle, raise the temperature to 80°C to remove water by vacuuming, add 200ml of toluene and 1.74g of TDI in turn, raise the temperature to 90°C, stir the reaction at high speed for 4 hours under the protection of nitrogen, then add 800ml of toluene and 50g of Dried nano silicon dioxide, the average particle size of silicon dioxide is 25nm, continue to react for 4 hours, vacuum filter after the reaction, wash with toluene, dry, pulverize, and sieve to obtain modified nano silicon dioxide particles.

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Abstract

The invention discloses modified inorganic nano particle and a preparation process and the application thereof. The modified inorganic nano particle is prepared through conducting polymerization reaction for inorganic nano particle and polyurethane prepolymer, wherein inorganic nano particle is nano calcium carbonate or nano silica dioxide. The preparation process comprises mixing inorganic nano particle and polyurethane prepolymer to react, wherein the reaction temperature is 75 DEG C to 100 DEG C, and the usage amount of polyurethane prepolymer is 3-20% of the weight of inorganic nano particle, optimally is 5-10%. Polyurethane prepolymer is obtained through reacting long-chain aliphatic alcohol and diisocyanate with mol ratio of 1:1 in 75-100 DEG C. The modified inorganic nano particle which is provided by the invention can be used as the filling of high molecular material, has excellent compatibility and dispersibility with substrate, can significantly increase the mechanical strength, abrasion resistance and heat resistance of substrate, is especially suitable to prepare polyurethane elastomer and the filling of polarity rubber, and has great industrial application prospect.

Description

technical field [0001] The invention relates to modified inorganic nanoparticles and their preparation methods and applications, in particular to inorganic nanoparticles modified by polyurethane prepolymers and their preparation methods and applications. Background technique [0002] Inorganic particles (such as calcium carbonate and silica) are often used as reinforcing fillers for plastics and rubber to improve product performance and product quality. With the development of nanotechnology, it is possible to make these inorganic fillers reach nanometer size. Due to the small particle size, large specific surface area and high specific surface energy of inorganic nanoparticles, they can effectively absorb energy, thereby achieving the effect of strengthening and toughening polymers. Their performance is significantly improved compared with traditional micron-sized inorganic particles, and can At the same time improve other properties of the polymer, such as heat resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/10C09C1/02C09C1/28C08G18/10
Inventor 李万利刘进立杨建雄黄忠耀周勇张秀芹赵莹王笃金
Owner INST OF CHEM CHINESE ACAD OF SCI
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