Method for preparing flexible transparent nano paper by utilizing bamboo fibers
A bamboo fiber and nano-paper technology, applied in special paper, pulping with inorganic alkali, paper, etc., can solve the problems of uncontrollable film thickness, transparency, paper is not easy to peel off, products are easy to crack, etc., and achieve high value-added economy. Efficient, easy to implement, low production cost effect
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Embodiment 1
[0024] Embodiment one: Specific steps are as follows:
[0025] (1) Swelling and degumming: Put 3 g of bamboo fiber into the reactor, add 200 g of an aqueous solution containing 4 g of NaOH, place the reactor in an oil bath at 120 °C, stir and cook for 3 h, filter and wash until neutral, Take the filter residue; (2) Delignification: Add the filter residue obtained in the above steps to 300 mL of a mixed solution containing acetic acid and sulfuric acid, where the volume fraction of acetic acid is 88%, and the volume fraction of sulfuric acid is 0.3%, and stir at 90 °C for 4 h Remove lignin, filter and wash until neutral, and take the filter residue; (3) Bleaching: bleach the filter residue obtained in the above steps, add 1.5% NaClO 2 solution of 200 mL with CH 3 Adjust the pH to 3~4 with COOH, bleach in an oil bath at 80°C for 4 h, filter and wash until neutral, and take the filter residue; (4) Fibrillation: Dilute the sample obtained in the above steps with 200 mL of etha...
Embodiment 2
[0027] Embodiment two: Specific steps are as follows:
[0028] (1) Swelling and degumming: Put 3 g of bamboo fibrils into the reactor, add 200 g of aqueous solution containing 6 g of NaOH, place the reactor in an oil bath at 140 °C, stir and cook for 4 h, filter and wash until neutral, Take the filter residue; (2) Delignification: Add the filter residue obtained in the above steps to 300 mL of a mixed solution containing acetic acid and sulfuric acid, where the volume fraction of acetic acid is 88%, and the volume fraction of sulfuric acid is 0.3%, and stir at 90 °C for 6 h Remove lignin, filter and wash until neutral, and take the filter residue; (3) Bleaching: bleach the filter residue obtained in the above steps, add 1.5% NaClO 2 solution of 300 mL with CH 3 Adjust the pH to 3~4 with COOH, bleach at 80°C for 6 h in an oil bath, filter and wash until neutral, and take the filter residue; (4) Fibrillation: Dilute the sample obtained in the above steps with 200 mL of ethan...
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