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Preparation method for polymer matrix micron/nanometer packing filling modification compound premix particles

A composite premix and nanofiller technology, applied in the field of composite raw materials or premix particles, can solve the problems of high surface energy, filling and modification can not achieve the expected effect, and the performance of composite materials is degraded, and the molecular structure can be achieved. Improved regularity, uniform and controllable dimensions, and improved interface bonding strength

Inactive Publication Date: 2014-12-10
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Filling modification is a commonly used modification method for polymers. However, due to the high surface energy of micron or nanometer fillers, easy agglomeration, and the low interfacial connection strength and poor compatibility between the organic polymer matrix and inorganic fillers, in actual polymerization It is difficult to form a uniformly dispersed composite system in the process of filler filling modification, which leads to the failure of filling modification to achieve the expected effect, but also reduces the performance of the composite material, especially for the filling modification of nano fillers.
Due to the small size of nanoparticles, large specific surface area, high surface energy, and easy agglomeration, when using nanoparticles to fill and modify the polymer matrix, the size of the nanoparticles often reaches the micron level or even larger due to the agglomeration of the nanoparticles themselves. The advantages of nanoparticles themselves cannot be effectively utilized, and even the inherent excellent properties of the material will be reduced

Method used

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  • Preparation method for polymer matrix micron/nanometer packing filling modification compound premix particles
  • Preparation method for polymer matrix micron/nanometer packing filling modification compound premix particles
  • Preparation method for polymer matrix micron/nanometer packing filling modification compound premix particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Weigh 60g of polyethersulfone (PES) particles and add them into N,N-dimethylformamide, stir them mechanically to fully dissolve them, and prepare 300ml of polyethersulfone homogeneous solution with a concentration of 0.2g / ml;

[0040] 2) Weigh 1g graphene oxide (GO), and make it dispersed in 100ml N,N-dimethylformamide, the preparation concentration is the graphene oxide dispersion liquid of 0.01g / ml, drop 0.05g (equivalent to 5wt% of the filler content) silane coupling agent KH550, in the dispersion process, magnetic stirring, ultrasonic pulverization each for 30 minutes, because the dispersion effect is not good, then add 0.05g (equivalent to 5wt% of the filler content) ten Sodium dialkyl sulfate is used as a surfactant, continue to stir for 30 minutes to disperse the dispersion evenly, then add it to the prepared PES solution, and stir for 30 minutes;

[0041] 3) Transfer the homogeneous mixed solution to figure 1 Continue to stir for 10 minutes in the device wit...

Embodiment 2

[0044] 1) Weigh 90g of polyethersulfone (PES) particles and add them to N,N-dimethylformamide, stir them mechanically to fully dissolve them, and prepare 900ml of polyethersulfone homogeneous solution with a concentration of 0.1g / ml;

[0045] 2) During the dissolution process of PES solution, weigh 30g CaCO 3 Disperse in N,N-dimethylformamide, stir mechanically, prepare 150ml concentration and be the calcium carbonate homogeneous dispersion liquid of 0.2g / ml, in the process of stirring and dispersing, drop 0.06g (equivalent to 0.2wt of filler content %) phthalate coupling agent;

[0046] 3) Disperse evenly CaCO 3 Add the dispersion liquid into the dissolved PES solution and stir for 20 minutes; then transfer the mixed solution to the pellet preparation device with a pore diameter of 1000 μm below, and continue stirring after fixing it. After 10 minutes, slowly open the valve below the device to make The solution was continuously dripped into the deionized water at a distance...

Embodiment 3

[0049] 1) Weigh 90 g of bisphenol A polysulfone (PSF) and add it to N,N-dimethylacetamide solvent, mix and stir mechanically to prepare 900 ml of PSF homogeneous solution with a concentration of 0.1 g / ml;

[0050] 2) Weigh 2g of carbon nanotube (CNT) powder and disperse in 100ml of N,N-dimethylacetamide to prepare a carbon nanotube dispersion with a concentration of 0.02g / ml, first stir for 30 minutes, and then ultrasonically pulverize for 30 minutes Add it to the previously prepared PSF solution, stir continuously for 10 minutes, and then sonicate for 20 minutes to prepare a uniformly dispersed mixed solution;

[0051] 3) Transfer the mixed solution to a device with a pore diameter of 200 μm below and continue to stir, then slowly open the valve below the device so that the solution can be evenly dripped into the collector with deionized water at a distance of 5 cm below in the form of droplets ; Stir the deionized water evenly with a magnetic stirrer;

[0052] 4) After the ...

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Abstract

The invention relates to a preparation method for polymer matrix micron / nanometer packing filling modification compounding premix particles. The preparation method comprises the following steps: dissolving a water-insoluble polymer matrix into a first water-soluble solvent to obtain a homogeneous polymer solution; dispersing the micron / nanometer packing into a second water-soluble solvent, and conducting stirring, heating, and ultrasonic treatment, adding a solubilizer or a coupling agent so as to obtain homogeneous micron / nanometer packing dispersing liquid; adding the homogeneous micron / nanometer packing dispersing liquid into the homogeneous polymer solution, and mixing uniformly to obtain a homogeneous solution system solution; dropwise adding the homogeneous solution system solution into a container filled with deionized water, wherein the dropwise-added liquid is rapidly coagulated into round particles with uniform particle diameters; collecting the round particles in the container and cleaning repeatedly; drying to obtain the polymer matrix micron / nanometer packing filling modification compound premix particles. According to the method provided by the invention, the method is simple, the cost is low, the agglomeration of the nanometer packing in the polymer matrix can be reduced effectively, the infiltration adsorption effect of the polymer matrix on inorganic packing is improved, the interface bonding strength of the polymer matrix and the inorganic packing is enhanced, and the filling modification effect is improved.

Description

technical field [0001] The invention relates to a method for preparing polymer-based micro / nano filler-filled modified composite premix particles. Dispersibility and uniformity and stability Prepare composite material raw materials or premix particles that are uniformly mixed, stable in performance, and free of filler agglomeration. technical background [0002] Filling modification is a commonly used modification method for polymers. However, due to the high surface energy of micron or nanometer fillers, easy agglomeration, and the low interfacial connection strength and poor compatibility between the organic polymer matrix and inorganic fillers, in actual polymerization It is difficult to form a uniformly dispersed composite system in the process of filling and modifying fillers, which leads to the failure of filling modification to achieve the expected effect, but also degrades the performance of composite materials, especially for the filling modification of nano-fillers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/16C08L81/06C08L25/06C08L79/08C08K9/06C08K3/04C08K3/36C08K9/04C08K7/00C08K3/22C08K7/14C08K7/06
Inventor 付绍云李飞渠成兵刘玉冯青平华阳方芳
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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