A kind of ZNO nano sheet regenerated cellulose film composite material and preparation method thereof
A thin-film composite material and regenerated cellulose technology, applied in chemical instruments and methods, water treatment of special compounds, organic compound/hydride/coordination complex catalysts, etc., can solve limited applications, high density of inorganic carriers, and environmental friendliness Poor performance and other problems, to achieve the effect of improving difficult recycling, improving high-value utilization, and making the preparation process clean and environmentally friendly
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Embodiment 1
[0026] 2g of wood pulp cellulose fibers were added to 80g of 65% (wt%) ZnCl 2 In aqueous solution, pretreatment in a low-temperature bath at -10°C for 4 hours. The above liquid-solid material was placed in a water bath at 70° C. and heated and stirred to obtain a transparent and uniform cellulose solution. Put the solution on a plastic flat plate, make a 500 μm thin sheet with a film scraper, put it in 50% NaOH aqueous solution, and let it stand for 9 hours. Take out the film and wash it with distilled water until there is no Cl - , put it in an ultra-low temperature refrigerator, and place the sample in a freeze dryer after freezing. After drying, a new material of ZnO nanosheet regenerated cellulose film is obtained. The characterization results are as follows Figure 1~4 shown. Depend on figure 1 It can be seen that the prepared thin film new material has better morphology. Depend on figure 2 It can be seen that the thickness of the ZnO nanosheets is about 50 nm, and...
Embodiment 2
[0028] 2g of wood pulp cellulose fibers were added to 120g of 70% (wt%) ZnCl 2 In aqueous solution, pretreatment in a low-temperature bath at 10°C for 2 hours. The above liquid-solid material was placed in a water bath at 60° C. and heated and stirred to obtain a transparent and uniform cellulose solution. Put the solution on a plastic flat plate, make a 250 μm thin sheet with a film scraper, put it in 50% NaOH aqueous solution, and let it stand for 6 hours. Take out the film and wash it with distilled water until there is no Cl - , put it in an ultra-low temperature refrigerator, and place the sample in a freeze dryer after freezing. After drying, a new material of ZnO nanosheet regenerated cellulose film is obtained. The thickness of the ZnO nanosheets is about 40nm, and the side length is about 400nm.
Embodiment 3
[0030] 2g bamboo pulp cellulose fiber is added to the ZnCl of 60g 65% (wt%) 2 In aqueous solution, pretreatment in a low-temperature bath at 0°C for 3 hours. The above liquid-solid material was placed in a water bath at 60° C. and heated and stirred to obtain a transparent and uniform cellulose solution. Put the solution on a plastic flat plate, make a 1000 μm thin sheet with a film scraper, put it in 50% NaOH aqueous solution, and let it stand for 4 hours. Take out the film and wash it with distilled water until there is no Cl - , put it in an ultra-low temperature refrigerator, and place the sample in a freeze dryer after freezing. After drying, a new material of ZnO nanosheet regenerated cellulose film is obtained. The thickness of the ZnO nanosheets is about 20nm, and the side length is about 200nm.
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