Modified sepiolite composite pigment and preparation method thereof
A composite pigment and sepiolite technology, which is applied in the direction of inorganic pigment treatment, chemical instruments and methods, organic dyes, etc., can solve the problem of low binding ability of inorganic core and organic pigment by ball milling method, and achieve scale and industrialization The effect of development, cost reduction, and simple process
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Embodiment 1
[0036] (1) Get the sepiolite whose average particle size is 16-20 μm for subsequent use; get 200ml of solution with acetic acid content of 2wt%, add 0.5g chitosan, stir to obtain chitosan solution after ultrasonic dissolution, then get 2g sepiolite Add chitosan solution and stir at room temperature for 6 hours, centrifuge, wash and dry to obtain chitosan-modified sepiolite;
[0037] (2) Take 100ml of deionized water, add 0.05g of sodium dodecylbenzenesulfonate to dissolve, then add 0.3g of Pigment Red 21, mix well to obtain a suspension, and take 0.7g of chitosan-modified sepiolite Add it to the suspension, heat in a water bath at 70°C, stir for 10 hours, centrifuge, wash with deionized water, and dry at 60°C for 12 hours to obtain a composite pigment.
[0038] figure 1 It is the FT-IR comparison chart of chitosan-modified sepiolite, sepiolite, composite pigment and pigment red 21. like figure 1 As shown, sepiolite is at 1447cm -1 There are obvious CO stretching vibration ...
Embodiment 2
[0045] (1) Take sepiolite with an average particle size of 16-20 μm for subsequent use; take 300 ml of a solution with 3% acetic acid content, add 0.6 g of chitosan, stir and ultrasonically dissolve to obtain a chitosan solution, and then take 2 g of sepiolite Add chitosan solution to room temperature and stir for 6 hours, centrifuge, wash and dry to obtain chitosan-modified sepiolite;
[0046] (2) Take 100ml of deionized water, add 0.05g of sodium dodecylbenzenesulfonate to dissolve, then add 0.1g of Pigment Red 21, mix well to obtain a suspension, and take 0.9g of chitosan-modified sepiolite Add it to the suspension, heat it in a water bath at 70°C, stir and react for 10 hours, centrifuge, wash with deionized water, and dry at 80°C for 18 hours to obtain a composite pigment.
Embodiment 3
[0048] (1) Take the sepiolite with an average particle size of 16-20 μm for subsequent use; take 200 ml of a solution with 3% acetic acid content, add 0.6 g of chitosan, stir and ultrasonically dissolve to obtain a chitosan solution, and then take 2 g of sepiolite Add chitosan solution to room temperature and stir for 6 hours, centrifuge, wash and dry to obtain chitosan-modified sepiolite;
[0049] (2) Take 100ml of deionized water, add 0.05g of sodium dodecylbenzenesulfonate to dissolve, then add 0.2g of Pigment Red 21, mix well to obtain a suspension, take 0.8g of chitosan-modified sepiolite and add into the suspension, heated in a water bath at 70°C, stirred for 10 hours, centrifuged, washed with deionized water, and dried at 80°C for 18 hours to obtain a composite pigment.
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