A kind of unidirectional gypsum whisker/polyvinyl chloride composite material and its preparation method
A technology of gypsum whisker and polyvinyl chloride, which is applied in the field of single-oriented gypsum whisker/polyvinyl chloride composite material and its preparation, can solve the problems of difference in performance of composite materials, easy to produce defects, different lengths, etc., and achieve processing performance. Good, high production efficiency, high degree of automation effect
Active Publication Date: 2019-11-26
WUHAN UNIV OF TECH
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Problems solved by technology
In the prior art, gypsum whiskers are generally used as polyvinyl chloride plastic fillers with different lengths of gypsum whiskers, which leads to differences in the performance of various parts of the composite material and is prone to defects
Method used
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Embodiment 1
[0023] Preparation of unidirectional gypsum whisker / polyvinyl chloride composite material, the steps are as follows:
[0024] 1) Preparation of modified gypsum whiskers: prepare 50 mL of stearic acid ethanol solution with a mass concentration of 5%, heat the stearic acid ethanol solution under reflux for 15 minutes, then add 20 g of hemihydrate gypsum whiskers (diameter 5 μm, aspect ratio: 10), continue to heat and reflux for 45 minutes, then suction filter, put the filter cake in a vacuum drying oven at 80°C and dry to obtain modified gypsum whiskers;
[0025] 2) Preparation of gypsum whisker / polyvinyl chloride composite material wire: add the modified gypsum whisker and polyvinyl chloride resin particles obtained in step 1) into the injection molding machine at a mass ratio of 1:10, see the flow chart figure 1 , the disorderly arranged gypsum whiskers 1 pass through the nozzle 4 of the injection molding machine, and then pass through the injection mold 5, the injection mold ...
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Abstract
The invention relates to a single-orientation gypsum whisker / polyvinyl chloride composite and a preparation method thereof. The composite is obtained by coating single-orientation gypsum whiskers with uniform length with polyvinyl chloride, the length of the gypsum whiskers is 25-40 mu m, and the single-orientation arrangement rate of the whiskers is larger than or equal to 65%. The single-orientation whiskers with uniform length are prepared from the gypsum whiskers, polyvinyl chloride is reinforced and toughened with the gypsum whiskers, so that the gypsum whiskers have better industrial application prospects, the process is green and environment-friendly, the processability is good, low-cost multi-functionalization can be realized, the modification cost of hard plastic is reduced, and the preparation method has a simple process, high automatic degree, high production efficiency and enormous industrial utilization value; the prepared single-orientation gypsum whisker / polyvinyl chloride composite has good uniaxial tensile strength, toughness and size stability.
Description
technical field [0001] The invention relates to the technical field of composite materials, in particular to a unidirectional gypsum whisker / polyvinyl chloride composite material and a preparation method thereof. Background technique [0002] Polyvinyl chloride plastic is the most widely used general-purpose plastic in the world. It is widely used in building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, fibers, etc. However, due to its high brittleness, low impact strength and insufficient toughness, its application in many fields is limited. One of the solutions is to add reinforcing fillers to polyvinyl chloride plastics. [0003] Gypsum whiskers have extremely high tensile strength and elastic modulus, and can be used as reinforcing agents or functional fillers in resins, rubber, coatings, and papermaking, and can also be used as ...
Claims
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IPC IPC(8): C08L27/06C08K9/04C08K7/08B29C48/05B29C48/355
CPCB29C48/0018B29C48/022B29C48/05C08K7/08C08K9/04C08K2201/003C08K2201/004C08K2201/016C08L27/06
Inventor 黄健黄昊朱杨房猛吕正航马保国
Owner WUHAN UNIV OF TECH