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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  • Abstract
  • 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

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

Examples

Experimental program
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Example Embodiment

[0014] Specific implementation mode 1: The preparation method of the silicon dioxide microsphere / polyoxymethylene composite material of this embodiment is carried out according to the following steps:

[0015] 1. Synthesis of monodisperse silica balls: a. Add 25% by mass ammonia and ethanol into a three-necked flask, then add silica seed liquid, and stir evenly at 220rpm; b. Keep 25% ℃ constant temperature water bath and 220 rpm stirring speed, while adding mixed solution A and mixed solution B dropwise, the dropping rate of mixed solution A is 0.10 mL / min, the dropping rate of mixed solution B is 0.05 mL / min, and the reaction is 8-10 hours to obtain The reaction solution; then the reaction solution was centrifuged to collect the solid phase; c. The solid phase was washed with a 99.7% ethanol solution by mass percentage, and then centrifuged to collect the solid phase; d. Repeat step c operation 3 ~5 times; then place the solid phase in an oven at 60°C for drying to obtain silica...

Example Embodiment

[0018] Specific embodiment two: this embodiment is different from specific embodiment one in that: the silica seed liquid described in step one is prepared as follows: 364 mg of L-arginine is added to 276 mL of distilled water, and then added 18 mL of cyclohexane was heated to 60°C in a water bath, and then stirred with a polytetrafluoroethylene paddle at a speed of about 300 rpm, and then 22 mL of distilled tetraethyl orthosilicate was added and stirred at a constant temperature for 20 hours to obtain a silica seed liquid. Others are the same as the first embodiment.

Example Embodiment

[0019] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the reaction described in step b is 8h. Others are the same as the first or second embodiment.

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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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