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Method for preparing cellulose nanocrystal/electrostatic spinning nanofiber filter film

A cellulose fiber and nanofiber membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problem of inability to effectively intercept particles, and achieve the effect of simple structure, wide source and low price

Inactive Publication Date: 2012-12-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patent CN1562441A discloses a method for preparing a sandwich-type nano / submicron electrospinning-based filter material, which can only effectively filter more than 90% of particles with a size between several hundred nanometers and several microns, but cannot achieve a diameter below 200nm effective interception of particles

Method used

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  • Method for preparing cellulose nanocrystal/electrostatic spinning nanofiber filter film
  • Method for preparing cellulose nanocrystal/electrostatic spinning nanofiber filter film
  • Method for preparing cellulose nanocrystal/electrostatic spinning nanofiber filter film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Under the condition of 80°C water bath temperature, soak 1g of cotton linters in a stirred tank filled with 50g mass fraction of 10% sodium hydroxide solution, the stirring speed is 100rpm, the stirring time is 30min, wash with water until neutral, and Carry out drying in vacuum oven, drying temperature is 60 ℃, and drying time is 12h, obtains the cotton fiber of alkali treatment;

[0039] (2) Under the temperature condition of 80 ℃ of water baths, the cotton fiber of alkali treatment is joined in the stirred tank that fills dimethyl sulfoxide, the solid-liquid mass ratio of cotton fiber and dimethyl sulfoxide is 1: 20, stir The rotation speed is 100 rpm, the stirring time is 6 hours, filtered, and the residual dimethyl sulfoxide is eluted with distilled water, and dried in a vacuum oven at a drying temperature of 80 ° C and a drying time of 12 hours to obtain pretreated cotton fibers;

[0040] (3) Add 1g of pretreated cotton fiber to a stirred tank filled with 0.001g...

Embodiment 2

[0047] (1) Under room temperature, 3g jute fiber powder is soaked in filling 100g mass fraction and is 20% sodium hydroxide solution stirring kettle, and stirring speed is 300rpm, and stirring time is 300min, washes to neutrality, in vacuum oven Carry out drying, drying temperature is 80 ℃, and drying time is 12h, obtains the jute fiber powder of alkali treatment;

[0048] (2) under the temperature condition of 60 ℃ of water baths, the jute fiber powder of alkali treatment is joined in the stirred tank that fills dimethyl sulfoxide, and the solid-liquid mass ratio of jute fiber powder and dimethyl sulfoxide is 1: 50 , the stirring speed is 300rpm, and the stirring time is 4h, filters, washes off residual dimethyl sulfoxide with distilled water, and dries in a vacuum oven at a drying temperature of 80°C and a drying time of 6h to obtain pretreated jute fiber powder ;

[0049] (3) Add 0.5g of pretreated cellulose fiber powder into a stirred tank containing 0.005g of TEMPO, 5g o...

Embodiment 3

[0057] (1) Under the condition of water bath temperature of 40°C, soak 1g of wood pulp fiber powder in a stirred tank filled with 200g of 10% sodium hydroxide solution by mass fraction, the stirring speed is 200rpm, the stirring time is 100min, and washed with water until neutral , drying in a vacuum oven at a drying temperature of 70°C and a drying time of 10 hours to obtain alkali-treated wood pulp fiber powder;

[0058] (2) Add alkali-treated wood pulp fiber powder into a stirred tank filled with dimethyl sulfoxide at a temperature of 50°C in a water bath, and the solid-to-liquid mass ratio of wood pulp fiber powder to dimethyl sulfoxide is 1 : 30, the stirring speed was 500rpm, the stirring time was 6h, filtered, and the residual dimethyl sulfoxide was eluted with distilled water, and dried in a vacuum oven at a drying temperature of 65°C and a drying time of 10h to obtain pretreated wood pulp fiber powder;

[0059] (3) Add 1 g of pretreated wood pulp fiber powder into a ...

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Abstract

The invention provides a method for preparing a cellulose nanocrystal / electrostatic spinning nanofiber filter film. The method is characterized in that the prepared cellulose nanocrystals of which the diameter is 3 to 10nm are coated on the surface of an electrostatic spinning nanofiber film to form a network structure so as to filter out impurities in raw water, intercept suspended solids, colloid, bacteria and the like in the water and effectively adsorb residual chlorine and heavy metal in the water; and therefore, the aim of purifying water quality can be fulfilled. Moreover, due to the adoption of a multi-layer compounded mode, the mechanical strength of the nano fiber film can be improved by the cellulose nanocrystals, so that the filter film has the advantages of simple structure, high mechanical strength, good filtering effect, low cost and the like, and has wide application prospect in the fields of drinking water purification, textile dyeing wastewater treatment, polyvinyl acetate (PVA) slurry recycling and the like.

Description

Technical field [0001] The invention relates to a method for preparing a cellulose nanocrystal / electrospun nanofiber filter membrane and belongs to the technical field of nano functional materials. Background technique [0002] Filtration is an effective means to achieve solid-liquid separation, and its main purpose is to remove suspended particles in water. Polymer membrane materials prepared by electrospinning technology have the advantages of small pore size, high porosity (up to 80% or even higher), good pore connectivity, high membrane surface roughness and low grammage. Therefore, they are different from traditional Compared with filtration membranes, electrospun nanofiber membranes have two outstanding advantages when used in liquid filtration: one is high filtration efficiency. Compared with conventional fiber filtration membranes, electrospun fiber membranes can increase filtration efficiency by 70%; Large throughput. Studies have shown that electrospun fiber memb...

Claims

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Application Information

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IPC IPC(8): B01D71/42B01D69/12B01D67/00C02F1/44
Inventor 丁彬曹新旺俞建勇
Owner DONGHUA UNIV
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