Camellia oleifera husk carboxyl fiber nanomaterial and its preparation method and application
A nutshell carboxyl group and nanomaterial technology, applied in the field of medicine, can solve the problems of unreported research, difficult to load drugs, single product structure, etc., and achieve the effect of simple preparation process and convenient industrial production.
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Embodiment 1
[0036] (1) 100g Camellia oleifera husks were pulverized and passed through a 60 mesh sieve, then extracted with 500g of ethyl acetate at 90°C for 6h, filtered, and 800g of 2wt% sodium hydroxide solution was added to the filter residue, reacted at 80°C for 4h, filtered, and the filter residue was washed with water until Neutral to give product 1 (85.6 g).
[0037] (2) Mix 50 g of product 1 with 50 g of sodium chlorite, add 500 mL of water, adjust the pH to 3.5 with glacial acetic acid, and react at 60°C for 8 hours. Filter, add 250 g of 30wt% hydrogen peroxide aqueous solution to the filter residue and mix, adjust the pH to 9 with 0.1M sodium hydroxide solution, treat at 40°C for 8h, filter, and wash the filter residue with water until neutral to obtain product 2 (38.4g).
[0038] (3) 20 g of product 2 was added to 100 g of 50 wt% sulfuric acid aqueous solution, reacted at 35° C. for 02 h, dialyzed (molecular weight cut-off 3000 Da) to near neutral pH, and freeze-dried to obtai...
Embodiment 2
[0041] (1) 100g Camellia oleifera husks were crushed and passed through a 200-mesh sieve, then extracted with 1500g of ethyl acetate at 60°C for 12h, filtered, 2500g of 10wt% sodium hydroxide solution was added to the filter residue, reacted at 100°C for 4h, filtered, and the filter residue was washed with water until Neutral to give product 1 (91.7 g).
[0042] (2) Mix 50 g of product 1 with 100 g of sodium chlorite, add 1000 mL of water, adjust the pH to 5.5 with glacial acetic acid, and react at 90 °C for 4 h. Filter, add 1000g of 40wt% hydrogen peroxide aqueous solution to the filter residue and mix, adjust the pH to 12 with 0.5M sodium hydroxide solution, treat at 70°C for 3h, filter, and wash the filter residue with water until neutral to obtain product 2 (41.5g).
[0043] (3) 20g of product 2 was added to 400g of 80wt% sulfuric acid aqueous solution, reacted at 55°C for 0.5h, dialyzed (molecular weight cut-off 1000Da) to near neutral pH, and freeze-dried to obtain produ...
Embodiment 3
[0046] (1) 100g Camellia oleifera husks were pulverized and passed through a 100-mesh sieve, then extracted with 1000g of ethyl acetate at 70°C for 8 hours, filtered, and 2000g of 5wt% sodium hydroxide solution was added to the filter residue, reacted at 90°C for 6 hours, filtered, and the filter residue was washed with water until Neutral to give product 1 (87.5 g).
[0047] (2) Mix 50 g of product 1 with 150 g of sodium chlorite, add 800 mL of water, adjust the pH to 4.5 with glacial acetic acid, and react at 750° C. for 6 hours. Filter, add 800 g of 50wt% aqueous hydrogen peroxide solution to the filter residue and mix, adjust the pH to 10 with 0.2M sodium hydroxide solution, treat at 50°C for 5h, filter, and wash the filter residue with water until neutral to obtain product 2 (39.4g).
[0048] (3) 20g of product 2 was added to 200g of 60wt% sulfuric acid aqueous solution, reacted at 45°C for 1 hour, dialyzed (molecular weight cut-off 2000Da) to near neutral pH, and freeze-...
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