A kind of method that utilizes garlic skin to prepare nano-cellulose whisker
A nanocellulose and whisker technology, which is applied in fiber raw material processing, textiles and papermaking, etc., can solve the problems of time-consuming and labor-intensive, cumbersome process, restricting the composite application and development of high aspect ratio nanocellulose whiskers, etc. Achieving the effect of avoiding impacts and hazards, simple process and easy implementation
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Embodiment 1
[0028] Embodiment one: concrete steps are as follows:
[0029] (1) High-pressure swelling: put 2g of garlic skin into an autoclave, add 100g of Na with a mass percentage concentration of 2wt% 2 CO 3 Aqueous solution, place the autoclave in an oven at 120°C for 120 min, and filter / wash the mixture with suction; (2) Cooking and degumming: put the swollen and suction-filtered product into a reaction vessel, add 100 g of wt% NaOH aqueous solution was reacted in an oil bath at 120 °C for 4 h, and the mixture was suction filtered / washed; (3) polysaccharide extraction: the degummed product fiber was placed in 400 mL of 2% H 2 SO 4 In the aqueous solution, stir the reaction in an oil bath at a temperature of 90 °C for 2 h, and filter / wash again; (4) Bleaching treatment: Add 400 mL of 5wt% H 2 o 2 In the solution, adjust the pH value to 11.5 with NaOH, stir the reaction in an oil bath at 45 °C for 6 h, then cool to room temperature, and use 300 mL of 1.4 wt% NaClO to acidify 2 Th...
Embodiment 2
[0031] Embodiment two: concrete steps are as follows:
[0032] (1) Cooking and screening: put 4 g of garlic skin into an autoclave, add 200 g of Na 2 CO 3 Aqueous solution, place the autoclave in an oven at 120°C for 120 min, and filter / wash the mixture with suction; (2) Cooking and degumming: put the swollen and suction-filtered product into a reaction vessel, add 200 g of wt% NaOH aqueous solution was reacted in an oil bath at 120 °C for 4 h, and the mixture was suction filtered / washed; (3) polysaccharide extraction: the degummed product fiber was placed in 600 mL of 2% H 2 SO 4 In the aqueous solution, stir the reaction in an oil bath at a temperature of 90 °C for 2 h, and filter / wash again; (4) Bleaching treatment: Add 400 mL of 5wt% H 2 o 2 In the solution, adjust the pH value to 11.5 with NaOH, stir the reaction in an oil bath at 45 °C for 6 h, then cool to room temperature, and use 300 mL of 1.4 wt% NaClO to acidify 2solution to continue bleaching with CH 3 Adjust...
Embodiment 3
[0034] Embodiment 3: The specific steps are as follows: This embodiment is basically the same as Embodiment 2, the difference is: stir and hydrolyze in sulfuric acid solution for 8 h.
[0035] The transmission electron micrograph of the garlic peel nanocellulose prepared by the present embodiment is as follows: image 3 As shown, it can be seen from the figure that the garlic skin nanocellulose whiskers are needle-shaped, with a diameter of 20nm~30nm and a length of 300nm~2μm.
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Abstract
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