A kind of high-performance calcium sulfate whisker material and preparation technology
A technology of calcium sulfate whiskers and sulfuric acid, which is used in the growth of polycrystalline materials, calcium/strontium/barium sulfate, nanotechnology for materials and surface science, etc. Performance evaluation, no optimization of the amount of stearic acid modifier and optimization of the amount of polymer in-situ modification, etc., have achieved great development potential, good processing performance, and improved impact toughness.
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Embodiment 1
[0036] Embodiment 1 takes stearic acid as modifying agent
[0037] In this embodiment, stearic acid is used as a modifier to modify calcium sulfate whiskers in situ. To test the effect of the product as a filler on the mechanical properties of polypropylene resin.
[0038] Take 2mol / L of CaCl 2 Put 1L of the solution in a 5L beaker, add 2L of industrial ethanol, stir mechanically for 5min, and take 2.72g, 5.44g, 8.16g, 10.88g, 13.60g, 16.32g of stearic acid respectively (so that the theoretical mass ratio of the product calcium sulfate is 1 :100, 2:100, 3:100, 4:100, 5:100, 6:100). After stirring for 15 minutes, add 1 L of 2 mol / L sodium sulfate solution to the solution, stir the obtained slurry for 2 hours respectively, then perform suction filtration, and dry the obtained calcium sulfate in an oven at 140°C for 4 hours to obtain a modified calcium sulfate product.
[0039] The modified calcium sulfate is added according to the total mass ratio of calcium sulfate and the m...
Embodiment 2
[0060] Embodiment 2 is modifier with styrene-acrylic emulsion
[0061] In this example, styrene-acrylic emulsion was used as a modifier to in-situ modify calcium sulfate whiskers, and its effect as a filler on the mechanical properties of polypropylene resin was tested.
[0062] Take 2mol / L of CaCl 2 Put 1L of the solution in a 5L beaker, add 2L of industrial ethanol, stir mechanically for 5min, and take 5.44g, 10.88g, 16.32g, and 21.76g of the styrene-acrylic emulsion (so that the theoretical mass ratio to the product calcium sulfate is 2:100, 4:100, 6:100, 8:100). After mechanically stirring for 15 minutes, add 1 L of 2mol / L sodium sulfate solution to the solution, stir the obtained slurry for 2 hours respectively, then perform suction filtration, and dry the obtained calcium sulfate in an oven at 140°C for 4 hours to obtain a modified calcium sulfate product. The modified calcium sulfate is added according to the total mass ratio of calcium sulfate and the mixture (a mixt...
Embodiment 3
[0073] Embodiment 3 takes calcium cellulose sulfonate as modifying agent
[0074] In this example, calcium cellulose sulfonate was used as a modifier to modify calcium sulfate whiskers in situ by reacting with aluminum sulfate, and its effect as a filler on the mechanical properties of polypropylene resin was tested.
[0075] Get 1L of 1mol / L calcium chloride solution in a 5L flask, weigh 95g of calcium cellulose sulfonate (the ratio of consumption to product calcium sulfate is 70:100) and pour it into a 5L flask, and mechanically stir at 300r / min for 15min. Mix the two solutions thoroughly, add 1 L of 1mol / L aluminum sulfate solution into the mixture, stir for 2 hours, filter, and dry at 140°C for 4 hours to obtain the modified calcium sulfate product.
[0076] The modified calcium sulfate whiskers prepared above were added to the polypropylene resin according to the addition amount of 10%, 20%, 30%, 40%, 50%, and 60%, respectively. After the same processing technology, the o...
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Abstract
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