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A kind of phosphorus tailings/polypropylene composite material and preparation method thereof
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A technology for composite materials and phosphorus tailings, applied in the field of phosphorus tailings/polypropylene composite materials and their preparation, can solve the problems of insufficient heat resistance, short service life, etc., so as to reduce usage, reduce production costs, and control strong effect
Inactive Publication Date: 2018-06-08
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology
However, PP is limited in its application in some fields due to its insufficient heat resistance and short service life. Therefore, the modification and application of polypropylene filled inorganic particles has attracted widespread attention at home and abroad.
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preparation example Construction
[0027] The preparation process of composite material of the present invention:
[0028] Dry the phosphorous tailings in a drying oven;
[0029] The dried phosphorus tailings and polypropylene are premixed according to the formula ratio, so that the raw materials are preliminarily mixed uniformly to obtain a premix, wherein the formula ratio is counted by weight percentage, the polypropylene is 50% to 90%, and the phosphorus tailings 10% to 50%.
[0030] Put the premix into the twin-screw extruder for mixing, wherein: the twin-screw extruder is parallel twin-screw in the same phase, the length-to-diameter ratio is 32:1-48:1; the speed is 160-250r / min ; Processing temperature is 165 ~ 190 ℃.
Embodiment 1
[0036] Composition of raw materials: 95% by mass of polypropylene and 5% of phosphorous tailings.
[0037] The twin-screw extruder used is 25cm in diameter, the aspect ratio is 32:1, the speed is 210r / min, the processing temperature is 165°C in the first zone, 170°C in the second zone, 175°C in the third zone, 180°C in the fourth zone, and 170°C ℃.
[0038] The phosphorous tailings / polypropylene composite material of this example was prepared according to the above preparation method.
Embodiment 2
[0040] Composition of raw materials: 90% by mass of polypropylene and 10% of phosphorous tailings.
[0041] The twin-screw extruder used is 25cm in diameter, the aspect ratio is 32:1, the speed is 210r / min, the processing temperature is 170°C in the first zone, 175°C in the second zone, 180°C in the third zone, 185°C in the fourth zone, and 175°C in the head. ℃.
[0042] The phosphorous tailings / polypropylene composite material of this example was prepared according to the above preparation method.
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Abstract
The invention discloses a phosphorus tailing / polypropylenecomposite material and a preparation method thereof. The phosphorus tailing / polypropylenecomposite material is prepared from the following raw materials in percentage by mass: 60-95 wt% of polypropylene and 5-40 wt% of phosphorus tailing. The particle size of the phosphorus tailing is 200 mesh or below. The melt index of the polypropylene is 4g / 10 minutes. The preparation method comprises the following steps: uniformly mixing the dried phosphorus tailing and polypropylene granules to obtain a premix; and adding the premix into the double screw extruder, and carrying out melt extrusion, wherein the double screw extruder is in an identical-direction parallel double-screw mode with the length-diameter ratio of 32:1-48:1. The method reduces the polypropylene resin consumption, and lowers the cost of the polypropylene composite material. The organic floatation aid attached to the phosphorus tailing surface can enhance the interface bonding property between the tailing inorganic granules and polypropylene matrix resin, thereby enhancing the mechanical properties of the composite material and changing the processing rheological properties.
Description
technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a phosphorus tailings / polypropylene composite material and a preparation method thereof. Background technique [0002] Phosphate rock is an important chemical mineral raw material, and it is also a raw material for phosphatefertilizer required for global agricultural production. Although my country is a country with large phosphate rock reserves, more than 90% of the phosphate rock grades in our country are lower than 26%, and the average grade is only 17%. In order to meet the requirements of producing phosphoric acid in the industry, phosphorous ore needs to obtain phosphorous concentrate that meets the production requirements through mineral processing technology, and at the same time, a large amount of phosphorous tailings are produced by-product. At present, due to the difficulty in the utilization of phosphorus tailings and the recovery of useful c...
Claims
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Application Information
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