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Nano powder composite material and its preparation method

A technology of nano-powder and composite material, applied in the field of nano-powder composite material and its preparation, can solve the problems of poor effect, complicated process, special equipment requirements, etc.

Inactive Publication Date: 2002-09-04
BEIJING ZHONGYONGYE SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, people generally use the traditional coupling agent treatment method to modify nanoparticles. The effect is not only bad, but also reduces the unique surface activity of nanoparticles, and loses the good properties that nanocomposites should have.
There are also people who mix gas-phase monomers with nanoparticles, and use radiation polymerization or initiator heating polymerization process to modify the surface of nanoparticles. Although this method is better than the coupling agent method, the process is complicated and the equipment requirements are special. high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take a certain amount of PE mixed with a certain amount of benzene and toluene to prepare a PE solution with a concentration of 2-4%, and then mix nano-calcium carbonate particles with it to form a paste, grind it in a ball mill for 20-60min, and recover After the solvent is removed, the polymer surface-coated modified nano-calcium carbonate can be obtained by crushing.

[0023] Extrude and granulate the prepared modified nano-calcium carbonate through a twin-screw extruder to obtain a PE-filled masterbatch of nano-calcium carbonate, and the content of the nano-calcium carbonate in the masterbatch is 72.5 wt%.

[0024] (1) After getting 500g nano-calcium carbonate PE filling masterbatch and 6kgLDPE, 1.5kgLLDPE to mix, blown into the thick film of 20 μm with film blowing machine, in this nano-calcium carbonate composite film, nano-calcium carbonate content is 4.5wt%, its Tensile strength, elongation at break and right-angle tear strength are respectively increased by 42%...

Embodiment 2

[0027] Take a certain amount of PP and a certain amount of xylene to configure a PP solution with a concentration of 6-10%, and make it according to the same method as Example 1, except that nano-silica is used instead of nano-calcium carbonate to obtain polymer-coated modified nano-calcium carbonate. silica. And use PP as carrier resin, make nano-silica PP filling masterbatch with the same method of embodiment 1. The content of nano silicon dioxide in the master batch is 75wt%.

[0028] (1) get 500g nano-silica PP filling masterbatch and mix with 7kgPP, make 20 μ m thick film with unidirectional stretch casting process, nano-silica content is 5wt% in this film, its longitudinal tensile strength, The elongation at break is 38% and 46% higher than that of pure PP uniaxially stretched film, respectively.

[0029] (2) Get 500g of nano-silica PP filling master batch and mix it with 7kgPP, and inject it into a standard spline with an injection machine, and the content of nano-sil...

Embodiment 3

[0031] Get a certain amount of CPVC and a certain amount of sherwood oil to configure a CPVC solution with a concentration of 4-8%, and use the same method as Example 1 to prepare the modified nano-titanium dioxide coated on the polymer surface.

[0032] Take 500g of modified nano-titanium dioxide and 12kg of PVC mixture (mixture composition: PVC: 100 parts, stabilizer: 5 parts, plasticizer: 5 parts, lubricant: 1.5 parts) and mix them evenly in a high mixer, then divide into 2 parts .

[0033] (1) get wherein 1 part is made into the thick uniaxially stretched film of 20 μm with uniaxially stretched casting process, nano-titanium dioxide content is 3.8wt% in this film, and its longitudinal tensile strength, elongation at break are higher than pure PVC Mixed unidirectional stretch film increased by 32% and 40%, respectively.

[0034] (2) Take the other part and masticate it on a double-roller plastic refining machine for 10 minutes, pulverize the made sheet, and inject it into ...

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PUM

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Abstract

The present invention relates to a nano powder composite material and its preparation method. Firstly, the surface of nano particle is covered and modified by a macromolecular compound, a thin layer of macromolecule is adsorbed on the surface of nano particle, so that the agglomeration force between particles is reduced and the dispersity in the resin can be raised. The modified nano powder can be directly mixed with base resin according to acertain propertion, and make into the nano powder composite material proluct, also can be mixed with carrier resin firstly, and made into the nanometre powder filling mother granule, then the mother granule can be mixed with based resin according to a certain propertion so as to obtain the nano powder composite material product, in which the modified nano powder material content is 1-10 wt%, land its tensile strength, bending strength, impact strength and breaking extension rate are raised by above 30%.

Description

field of invention [0001] The invention relates to a nano powder composite material and a preparation method thereof. Background technique [0002] The use of inorganic nanoparticles to fill modified polymers to prepare high-performance nanocomposites is a field that has been studied more and has greater application value in material science. [0003] The particle size of nanoparticles is generally 1-100nm, which is in the transition zone between atomic groups and macroscopic objects, and is a typical mesoscopic system. Due to the structural characteristics of nanoparticles, nanoparticles have extremely high surface energy and are extremely easy to agglomerate. In the process of research and development of nanocomposite materials, solving the problem of nanoparticle agglomeration and uniform dispersion in matrix resin is the key to determining the performance of composite materials. key. At present, people generally use the traditional coupling agent treatment method to mo...

Claims

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Application Information

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IPC IPC(8): C08K7/00C08L23/00C08L25/06C08L27/06
Inventor 王锡臣邓意超
Owner BEIJING ZHONGYONGYE SCI & TECH DEV
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