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A preparation method of nanocellulose, nanocellulose and water purification membrane, and a preparation method of water purification membrane

A technology of nano-cellulose and α-cellulose, applied in chemical instruments and methods, permeation/dialysis water/sewage treatment, membranes, etc., can solve the problems of inability to meet the requirements of water purification membranes, low service life, and poor durability of natural fiber membranes , to achieve the effect of safe separation operation method, low density and extended service life

Active Publication Date: 2019-10-29
青岛诺亚水务工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Macromolecular polymer raw materials cannot meet the requirements of manufacturing such high-end water purification membranes
[0009] Finally, due to the hydrophilic swelling effect of natural cellulose, the existing natural cellulose membranes used for water treatment have poor durability and low lifespan.

Method used

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  • A preparation method of nanocellulose, nanocellulose and water purification membrane, and a preparation method of water purification membrane
  • A preparation method of nanocellulose, nanocellulose and water purification membrane, and a preparation method of water purification membrane
  • A preparation method of nanocellulose, nanocellulose and water purification membrane, and a preparation method of water purification membrane

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preparation example Construction

[0056] The embodiment of the present invention provides a kind of preparation method of nanocellulose, such as figure 1 shown, including the following steps:

[0057] Step 1: Raw material pretreatment: take the asparagus grass and cut it and crush the asparagus powder, put the asparagus powder into the fermentation tank for biodegradation to obtain the raw material for degradation treatment;

[0058] Step 2: Prepare α-cellulose; take the dehydrated raw materials for degradation treatment and add them to ionic liquids, stir and mix them for solid-liquid separation to obtain filtrate A and filter residue B, add filter residue B to ionic liquids, heat to dissolve, and undergo solid-liquid separation Obtain filtrate C and filter residue D, add ethanol to filtrate C and obtain alpha cellulose through solid-liquid separation;

[0059] Step 3: Preparation of nanocellulose: take anhydrous phosphoric acid to prepare anhydrous phosphoric acid solution, mix the α cellulose prepared in s...

Embodiment 1

[0099] A preparation method of nanocellulose, comprising the following steps:

[0100] Step 1: Raw material pretreatment: take asparagus grass and cut and crush the asparagus powder, take the asparagus powder and put it into the fermentation tank, and add hemicellulase to make the hemicellulose concentration in the fermentation tank 0.05g / L, the temperature in the fermentation tank is 50°C, and the biodegradation time is 24 hours; biodegradation is carried out to obtain raw materials for degradation treatment;

[0101] Step 2: Prepare α-cellulose; take the dehydrated degraded raw material and add 2-methoxyethyl-1-methylpyrrolidinium lysine salt according to the solid-to-liquid ratio of 1:1, and the mixing condition is stirring at 50°C 2h, after stirring and mixing, carry out solid-liquid separation to obtain filtrate A and filter residue B, take filter residue B and add methoxyethyl bisethyl methylamine alanine salt, heat to dissolve, and obtain filtrate C and filter residue ...

Embodiment 2

[0105] A preparation method of nanocellulose, comprising the following steps:

[0106] Step 1: Raw material pretreatment: take asparagus grass and cut and crush the asparagus powder, take the asparagus powder and put it into the fermentation tank, and add hemicellulase, so that the hemicellulose concentration in the fermentation tank is 0.1g / L, the temperature in the fermentation tank is 45°C, and the biodegradation time is 26 hours; biodegradation is carried out to obtain the degradation treatment raw materials;

[0107] Step 2: Prepare α-cellulose; take the dehydrated degraded raw material and add 2-methoxyethyl-1-methylpyrrolidinium lysine salt according to the solid-to-liquid ratio of 1:1, and the mixing condition is stirring at 60°C 3h, after stirring and mixing, carry out solid-liquid separation to obtain filtrate A and filter residue B, take filter residue B and add methoxyethyl bisethyl methylamine alanine salt, heat to dissolve, obtain filtrate C and filter residue D...

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Abstract

The invention belongs to the technical field of water purification and particularly relates to a preparation method of nanocellulose, the nanocellulose, a water purifying membrane and a preparation method of the water purifying membrane. The preparation method of the nanocellulose comprises steps as follows: raw material pretreatment; preparation of alpha cellulose and preparation of nanocellulose. The nanocellulose is prepared with the preparation method. The water purifying membrane comprises the nanocellulose. The preparation method of the water purifying membrane comprises steps as follows: preparation of a lignin base layer, preparation of a polyether sulfone ultrafiltration layer and preparation of the water purifying membrane, wherein the raw material lignin of the lignin base layer is a product separated in the preparation method of the nanocellulose. The preparation method adopts mild conditions, pollution emission is avoided, and the finally prepared nanocellulose meets requirement for preparation of the water purifying membrane. Further, the content of the nanocellulose in the water purifying membrane obtained with the provided preparation method of the water purifying membrane is high, the service life is longer and the water purifying effect is better.

Description

technical field [0001] The invention belongs to the technical field of water purification materials, and in particular relates to a preparation method of nanocellulose, nanocellulose, a water purification membrane, and a preparation method of the water purification membrane. Background technique [0002] Membrane water treatment technology is an important technology to solve the resource-based water shortage problem, an advanced technology to ensure the safety of drinking water, and the core technology of domestic drinking water treatment, which is widely used in water purification products. The capacity and output value of China's membrane market ranks second in the world, and it is possible to surpass the United States in a few years and become the world's largest membrane market. At present, 90% of domestic reverse osmosis membranes are imported products; and 50%-70% of the raw materials used to make membranes depend on imports. There are more than 300 membrane product m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B5/00C08H7/00C08J7/04B01D71/20B01D71/76B01D69/12B01D69/02B01D67/00C02F1/44C08L97/00
CPCB01D67/0009B01D69/02B01D69/12B01D71/20B01D71/76B01D2325/36B01D2325/38B01D2325/40C02F1/44C07G1/00C08B5/00C08J7/042C08J2397/00C08J2401/16C08J2481/06
Inventor 任桂芬张亮
Owner 青岛诺亚水务工程有限公司
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