A kind of preparation method of bagasse cellulose nanofiber film

Abstract

The invention discloses a preparation method for a bagasse cellulose nanofiber membrane. The method comprises the main steps of preparing bagasse, preparing bagasse cellulose and preparing the bagasse nano-cellulose membrane. (1) acid-base chemical treatment is carried out; (2) solution is treated through the mechanical methods such as grinding and centrifuging, and uniform biomass cellulose nanofiber is prepared; (3) membrane formation is carried out through vacuum filtration. The preparation method has the advantages that the method is simple, the cost is lower, the popularization is easy, the reclamation and effective recycling of waste are realized, the pollution to the environment is relieved, and the high-value utilization of bagasse is also facilitated.

Description

technical field

[0001] The invention relates to a preparation method of bagasse cellulose nanofiber membrane. Background technique

[0002] my country is the third largest sugarcane planting country in the world after Brazil and India. As a bulk sugar crop, sugarcane occupies an important position in the national economy. Bagasse is a by-product of sugar production. It is the dregs after sugar cane is squeezed. It has relatively low protein content and calories. For a long time, this large batch of bagasse is mainly used as fuel for the sugar factory itself to be burned or discarded, and the economic value of this utilization method is very low. The development and utilization of bagasse resources can not only improve the economic benefits of sugar factories, but also provide a large amount of resources for other industries, which is of great significance to many industries. The research on bagasse cellulose is closely related to the development of society, economy, resour...

Examples

Embodiment 1

[0020] Dissolve 10g of bagasse powder in 500ml of water, add 10g of sodium hydroxide, stir at 80°C for 2 hours, rinse until neutral; add 100ml of 2% sodium hydroxide solution, stir well, add bagasse after washing, and soak for 15 minutes Wash until neutral; add 4.5g sodium chlorite and 4ml glacial acetic acid to 500ml water, stir at 75°C, add 4.5g sodium chlorite and 4ml glacial acetic acid after 1 hour, repeat 2 times and treat for 3 hours, wash until neutral Add 14ml hydrochloric acid to 500ml water, heat and stir at 80°C for 2 hours, wash until neutral, dry and weigh in an oven. Finally, a bagasse cellulose nanofiber membrane with a weight of 4.1 g was obtained.

Embodiment 2

[0022] Take 10g of bagasse, benzene and ethanol to make a mixed solution at a ratio of 1:3 and extract it under water at 100°C for 6 hours; alkali treatment: dissolve 10g of bagasse powder in 500ml of water, add 10g of sodium hydroxide, and stir at 80°C for 2h , rinse until neutral; add 100ml of 2% sodium hydroxide solution, stir evenly, add the washed bagasse, soak for 15 minutes and wash until neutral. Acid treatment: Add 4.5g sodium chlorite and 4ml glacial acetic acid to 500ml water, stir at 75°C, add 4.5g sodium chlorite and 4ml glacial acetic acid after 1 hour, repeat 2 times and treat for 3 hours, wash until neutral; Add 14ml of hydrochloric acid to 500ml of water, heat and stir at 80°C for 2 hours, wash until neutral, dry in an oven and weigh. Finally, a bagasse cellulose nanofiber membrane with a weight of 3.4 g was obtained.

Embodiment 3

[0024] The optimum bleaching condition using hydrogen peroxide is pH value 9.0~10.0, treatment at 70℃ for 2.5h. Pulping strength was less affected after hydrogen peroxide bleaching, and had little effect on carbohydrates. From the bleaching effect of the experiment, the effect of hydrogen peroxide bleaching is lower than that of sodium chlorite under acidic conditions.

technical field

[0001] The invention relates to a preparation method of bagasse cellulose nanofiber membrane. Background technique

[0002] my country is the third largest sugarcane planting country in the world after Brazil and India. As a bulk sugar crop, sugarcane occupies an important position in the national economy. Bagasse is a by-product of sugar production. It is the dregs after sugar cane is squeezed. It has relatively low protein content and calories. For a long time, this large batch of bagasse is mainly used as fuel for the sugar factory itself to be burned or discarded, and the economic value of this utilization method is very low. The development and utilization of bagasse resources can not only improve the economic benefits of sugar factories, but also provide a large amount of resources for other industries, which is of great significance to many industries. The research on bagasse cellulose is closely related to the development of society, economy, resour...

Examples

Embodiment 1

[0020] Dissolve 10g of bagasse powder in 500ml of water, add 10g of sodium hydroxide, stir at 80°C for 2 hours, rinse until neutral; add 100ml of 2% sodium hydroxide solution, stir well, add bagasse after washing, and soak for 15 minutes Wash until neutral; add 4.5g sodium chlorite and 4ml glacial acetic acid to 500ml water, stir at 75°C, add 4.5g sodium chlorite and 4ml glacial acetic acid after 1 hour, repeat 2 times and treat for 3 hours, wash until neutral Add 14ml hydrochloric acid to 500ml water, heat and stir at 80°C for 2 hours, wash until neutral, dry and weigh in an oven. Finally, a bagasse cellulose nanofiber membrane with a weight of 4.1 g was obtained.

Embodiment 2

[0022] Take 10g of bagasse, benzene and ethanol to make a mixed solution at a ratio of 1:3 and extract it under water at 100°C for 6 hours; alkali treatment: dissolve 10g of bagasse powder in 500ml of water, add 10g of sodium hydroxide, and stir at 80°C for 2h , rinse until neutral; add 100ml of 2% sodium hydroxide solution, stir evenly, add the washed bagasse, soak for 15 minutes and wash until neutral. Acid treatment: Add 4.5g sodium chlorite and 4ml glacial acetic acid to 500ml water, stir at 75°C, add 4.5g sodium chlorite and 4ml glacial acetic acid after 1 hour, repeat 2 times and treat for 3 hours, wash until neutral; Add 14ml of hydrochloric acid to 500ml of water, heat and stir at 80°C for 2 hours, wash until neutral, dry in an oven and weigh. Finally, a bagasse cellulose nanofiber membrane with a weight of 3.4 g was obtained.

Embodiment 3

[0024] The optimum bleaching condition using hydrogen peroxide is pH value 9.0~10.0, treatment at 70℃ for 2.5h. Pulping strength was less affected after hydrogen peroxide bleaching, and had little effect on carbohydrates. From the bleaching effect of the experiment, the effect of hydrogen peroxide bleaching is lower than that of sodium chlorite under acidic conditions.