A kind of method utilizing bamboo fiber to prepare flexible transparent nano paper

Abstract

The invention provides a method for preparing flexible transparent nano paper by utilizing bamboo fibers. The flexible transparent nano paper is prepared by using the bamboo fibers as raw materials and carrying out five treatment processes including swelling and degumming, delignification, bleaching treatment, nano fibrillation treatment and paper forming. The method has the advantages that a film is formed by adopting high-pressure filtration, the process is simple, and the film thickness is controllable; the prepared transparent nano paper has the characteristics of micropore structure, large specific surface area, transparency and flexibility; the transparent nano paper has good application prospects in the fields such as thin film solar batteries, super-capacitors, lithium-ion battery separators, catalytic carriers, environmental management, antistatic electricity and the like.

Description

technical field

[0001] The invention relates to a method for preparing flexible transparent nano-paper by using bamboo fibres, belonging to the field of nano-material preparation, in particular to the technical field of cellulose nano-paper preparation. Background technique

[0002] Currently the biggest challenge in the electronics industry is to manufacture portable, flexible, low-cost and recyclable devices. Flexible electronics are developing in the direction of large area, high efficiency, and low cost. The next generation of flexible electronic systems such as flexible displays, thin film sensors, OLEDs, solar cells, human-computer interaction, and e-textiles, the characteristics of substrate materials and the characteristics of substrates and conductors The interface properties between materials put forward higher requirements. Glass substrates are widely used in electronics and displays, and have a low coefficient of thermal expansion (CET), but are highly brittle a...

Examples

Embodiment 1

[0024] Embodiment one: Specific steps are as follows:

[0025] (1) Swelling and degumming: put 3g of bamboo fiber into the reaction kettle, add 200g of aqueous solution containing 4g of NaOH, put the reaction kettle in an oil bath with a temperature of 120°C, stir and cook for 3h, filter and wash until neutral, and 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, wherein 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 hours to remove lignin. Suction filtration and washing until neutral, take the filter residue; (3) Bleaching: bleach the filter residue obtained in the above steps, add 1.5% NaClO 2 solution 200mL with CH 3 Adjust the pH to 3~4 with COOH, bleach at 80°C for 4 hours in an oil bath, filter and wash until neutral, and take the filter residue; (4) Fibrillation: Dilute the sample ...

Embodiment 2

[0027] Embodiment two: Specific steps are as follows:

[0028] (1) Swelling and degumming: put 3g of bamboo fiber into the reaction kettle, add 200g of aqueous solution containing 6g of NaOH, put the reaction kettle in an oil bath with a temperature of 140°C, stir and cook for 4h, filter and wash until neutral, and 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, wherein 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 hours to remove lignin. Suction filtration and washing until neutral, take the filter residue; (3) Bleaching: bleach the filter residue obtained in the above steps, add 1.5% NaClO 2 solution 300mL with CH 3 Adjust the pH to 3~4 with COOH, bleach at 80°C for 6 hours in an oil bath, filter and wash until neutral, and take the filter residue; (4) Fibrillation: Dilute the sample ...

technical field

[0001] The invention relates to a method for preparing flexible transparent nano-paper by using bamboo fibres, belonging to the field of nano-material preparation, in particular to the technical field of cellulose nano-paper preparation. Background technique

[0002] Currently the biggest challenge in the electronics industry is to manufacture portable, flexible, low-cost and recyclable devices. Flexible electronics are developing in the direction of large area, high efficiency, and low cost. The next generation of flexible electronic systems such as flexible displays, thin film sensors, OLEDs, solar cells, human-computer interaction, and e-textiles, the characteristics of substrate materials and the characteristics of substrates and conductors The interface properties between materials put forward higher requirements. Glass substrates are widely used in electronics and displays, and have a low coefficient of thermal expansion (CET), but are highly brittle a...

Examples

Embodiment 1

[0024] Embodiment one: Specific steps are as follows:

[0025] (1) Swelling and degumming: put 3g of bamboo fiber into the reaction kettle, add 200g of aqueous solution containing 4g of NaOH, put the reaction kettle in an oil bath with a temperature of 120°C, stir and cook for 3h, filter and wash until neutral, and 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, wherein 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 hours to remove lignin. Suction filtration and washing until neutral, take the filter residue; (3) Bleaching: bleach the filter residue obtained in the above steps, add 1.5% NaClO 2 solution 200mL with CH 3 Adjust the pH to 3~4 with COOH, bleach at 80°C for 4 hours in an oil bath, filter and wash until neutral, and take the filter residue; (4) Fibrillation: Dilute the sample ...

Embodiment 2

[0027] Embodiment two: Specific steps are as follows:

[0028] (1) Swelling and degumming: put 3g of bamboo fiber into the reaction kettle, add 200g of aqueous solution containing 6g of NaOH, put the reaction kettle in an oil bath with a temperature of 140°C, stir and cook for 4h, filter and wash until neutral, and 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, wherein 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 hours to remove lignin. Suction filtration and washing until neutral, take the filter residue; (3) Bleaching: bleach the filter residue obtained in the above steps, add 1.5% NaClO 2 solution 300mL with CH 3 Adjust the pH to 3~4 with COOH, bleach at 80°C for 6 hours in an oil bath, filter and wash until neutral, and take the filter residue; (4) Fibrillation: Dilute the sample ...

Images