Preparation method and application of durable pH-responsive intelligent super-infiltrated fabric with self-repairing performance
A self-healing and responsive technology, applied in separation methods, wear-resistant fibers, chemical instruments and methods, etc., to achieve stable physical and chemical properties, easy implementation, and good durability
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[0036] The preparation method of the present invention comprises the following steps:
[0037] Step 1. Mix 0.25 g of perfluorooctanoic acid (PFOA) with a purity of 98% and 1.3 g to 1.7 g of butyl titanate, then add 5 to 7 mL of deionized water and 5 to 7 mL of ethanol to the resulting mixed solution, and The obtained mixed solution was ultrasonically dispersed for 20 minutes, so that the added PFOA and butyl titanate were uniformly dispersed in the solution, and then the mixed solution was stirred at 55-60° C. for 2-3 hours, and set aside.
[0038] Step 2, the anatase TiO of 0.15~0.25g 2 Add 20-30mL of absolute ethanol, and then add 0.20g-0.25g of PFOTS (perfluorooctyl trichlorosilane) to the mixture, then soak the hydroxylated fabric in the mixture, ultrasonically disperse for 30min, and so that the added TiO 2 and PFOTS are uniformly dispersed in the mixed solution, then the mixed solution is stirred in a water bath at 55-60°C for 2-3 hours, and then the PFOA / butyl titanat...
Embodiment 1
[0041] Step 1. Mix 0.25g of perfluorooctanoic acid (PFOA) with a purity of 98% and 1.3g to 1.7g of butyl titanate, then add 5mL of deionized water and 5mL of ethanol to the resulting mixed solution, and dissolve the resulting mixed solution Ultrasonic dispersion for 20min, stirring at 60°C for 3h, set aside.
[0042] Step 2, 0.15-0.25g of anatase TiO with a particle size of 10-50nm 2 Add 25mL of absolute ethanol, then add 0.20g ~ 0.25g of PFOTS to the mixture, then soak the hydroxylated fabric in the mixture, ultrasonically disperse for 30min, stir in a water bath at 60°C for 3h, then add to it and prepare in step 1 The PFOA / butyl titanate solution was continuously stirred at 60°C for 4h.
[0043] Step 3. Dry the modified fabric obtained in Step 2 at room temperature, and then dry it in a vacuum oven at 105°C for 2 hours, thereby preparing a durable and self-healing pH-responsive smart super-wetting fabric .
[0044] figure 1 is the change of the wettability of the surface...
Embodiment 2
[0054] Step 1. Mix perfluorooctanoic acid and butyl titanate, then add water and ethanol, ultrasonically disperse, heat to 55°C and stir for 3 hours to obtain PFOA / butyl titanate solution; among them, anatase TiO 2 The particle size is 10-50nm, the mass ratio of perfluorooctanoic acid to butyl titanate is 0.25:1.7; the ratio of perfluorooctanoic acid to water is 0.25g:5mL, and the ratio of perfluorooctanoic acid to ethanol is 0.25g:5mL.
[0055] Step 2, anatase TiO 2 Add it to absolute ethanol, and add PFOTS to obtain a mixed solution, then soak the hydroxylated fabric in the mixed solution, ultrasonically disperse it, heat it to 70°C and stir for 2 hours, add PFOA / butyl titanate solution, and stir under heating uniform; among them, anatase TiO 2 The ratio with absolute ethanol is 0.15g: 20mL. Perfluorooctanoic acid, anatase TiO 2 The mass ratio to PFOTS is 0.25:0.15:0.2.
[0056] Step 3, drying the modified fabric obtained in Step 2 to obtain a durable and self-repairing ...
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