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Preparation method of silicon dioxide microsphere/polyformaldehyde composite material

A technology of silicon dioxide microspheres and composite materials, applied in the direction of silicon dioxide, silicon oxide, etc., can solve the problems of low impact strength, low impact strength and bending strength, and achieve good impact strength, controllable size and uniform particle size. Effect

Inactive Publication Date: 2013-07-31
HEILONGJIANG UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention aims to solve the problems of low notched impact strength, impact strength and bending strength of polyoxymethylene materials, and provides a preparation method of silica microsphere / polyoxymethylene composite material

Method used

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  • Preparation method of silicon dioxide microsphere/polyformaldehyde composite material
  • Preparation method of silicon dioxide microsphere/polyformaldehyde composite material
  • Preparation method of silicon dioxide microsphere/polyformaldehyde composite material

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specific Embodiment approach 1

[0014] Specific embodiment one: the preparation method of a kind of silicon dioxide microsphere / polyoxymethylene composite material of this embodiment is carried out according to the following steps:

[0015] 1. Synthesis of monodisperse silica spheres: a. Add ammonia water and ethanol with a mass percentage of 25% to a three-neck flask, then add silica seed solution, and stir evenly at 220 rpm; b. Keep 25 ℃ constant temperature water bath and 220rpm stirring speed, drop mixed solution A and mixed solution B at the same time, wherein the dropping rate of mixed solution A is 0.10mL / min, the dropping rate of mixed solution B is 0.05mL / min, react for 8 to 10h, get Reaction solution; then the reaction solution is centrifuged to collect the solid phase; c, the solid phase is cleaned with a mass percentage of 99.7% ethanol solution, and then centrifuged to collect the solid phase; d, repeat step c operation 3 ~5 times; then the solid phase was placed in a 60°C oven for drying to obt...

specific Embodiment approach 2

[0018] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the silicon dioxide seed solution described in step 1 is prepared according to the following steps: 364mg L-arginine is added to 276mL distilled water, and after dissolving, add 18mL of cyclohexane, heated to 60°C in a water bath, then stirred with a polytetrafluoroethylene paddle at a speed of about 300rpm, then added 22mL of distilled tetraethyl orthosilicate, and stirred at constant temperature for 20h to obtain a silica seed solution. Others are the same as the first embodiment.

specific Embodiment approach 3

[0019] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the reaction 8h described in step b. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of a silicon dioxide microsphere / polyformaldehyde composite material. The invention aims to solve the problems of low notch impact strength, shock strength and bending strength in the polyformaldehyde material. The preparation method comprises the following steps: 1. synthesizing monodisperse silicon dioxide spheres; 2. drying polyformaldehyde in a drying oven at 80 DEG C for 4 hours, adding the silicon dioxide microspheres and assistants, evenly mixing with a low-speed mixing machine, and extruding and granulating with a double screw extruder to obtain the silicon dioxide microsphere / polyformaldehyde composite material, thereby completing the preparation of the silicon dioxide microsphere / polyformaldehyde composite material. The invention is applied to the field of preparation of polyformaldehyde composite materials.

Description

technical field [0001] The invention relates to a preparation method of silica microsphere / polyoxymethylene composite material. Background technique [0002] Polyoxymethylene (POM) is an unbranched linear high-crystalline polymer. It is one of the resin varieties with the closest specific strength to metal in all plastics. It is commonly known as "plastic steel". It has extremely high strength and rigidity, and is outstanding Excellent fatigue resistance, good dimensional stability, electrical insulation, excellent chemical resistance, self-lubrication and other properties, is an engineering plastic with excellent comprehensive properties, and has become one of the top five engineering plastics in the world. With the rapid development of the national economy, POM plastics and their composite materials are widely used in aviation, automobiles, electronic appliances, hardware and building materials, machinery and other fields. However, due to its own molecular chain structure...

Claims

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Application Information

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IPC IPC(8): C08L59/00C08K7/18C08K3/36C01B33/18
Inventor 孙立国迟旭阳谢刚耿文浩何延平
Owner HEILONGJIANG UNIV
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