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Preparation method of porous network structure fiber membrane of nano cellulose/silicon dioxide

A technology of nanocellulose and cellulose fibers, which is applied in textiles, papermaking, non-woven fabrics and other directions to achieve the effects of improving mechanical properties, good filtering effect and low price

Inactive Publication Date: 2012-11-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN102030986A discloses a polybenzoxazine resin / SiO2 hybrid material and its preparation method. The finished product is not a fiber membrane material, and is only suitable for the preparation of ceramic precursors, high-performance composite material substrates, and ablation-resistant materials.

Method used

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  • Preparation method of porous network structure fiber membrane of nano cellulose/silicon dioxide
  • Preparation method of porous network structure fiber membrane of nano cellulose/silicon dioxide
  • Preparation method of porous network structure fiber membrane of nano cellulose/silicon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Under the condition of 80℃ water bath temperature, soak 1g cotton linters in a stirred tank containing 50g of 10% sodium hydroxide solution, the stirring speed is 100rpm, the stirring time is 30min, and the water is washed until it is neutral. Drying in a vacuum oven with a drying temperature of 60°C and a drying time of 12 hours to obtain alkali-treated cotton fibers;

[0042] (2) Under the condition of a water bath temperature of 80℃, add the alkali-treated cotton fiber to the stirred tank containing dimethyl sulfoxide, the solid-liquid mass ratio of cotton fiber to dimethyl sulfoxide is 1:20, stir Rotation speed is 100rpm, stirring time is 6h, 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 12h to obtain pretreated cotton fibers;

[0043] (3) Under the condition of 4℃ water bath temperature, add 1g of pretreated cotton fiber to a stirred tank containing 0.001g...

Embodiment 2

[0054] (1) Under the condition of 60℃ water bath temperature, soak 3g of ramie fiber powder in a stirred tank containing 100g of 15% sodium hydroxide solution, the stirring speed is 200rpm, the stirring time is 100min, and the water is washed until it is neutral. Drying in a vacuum oven with a drying temperature of 60°C and a drying time of 8 hours to obtain alkali-treated ramie fiber powder;

[0055] (2) Add the alkali-treated ramie fiber powder to the stirred tank containing dimethyl sulfoxide under the condition of a water bath temperature of 50°C. The solid-liquid mass ratio of ramie fiber powder to dimethyl sulfoxide is 1:40 , The stirring speed is 500rpm, the stirring time is 5h, filtered, the residual dimethyl sulfoxide is eluted with distilled water, and dried in a vacuum oven at a drying temperature of 60℃ and a drying time of 12h to obtain pretreated ramie fiber powder ;

[0056] (3) Add 1g of pretreated ramie fiber powder to a stirred tank containing 0.001g TEMPO, 5g so...

Embodiment 3

[0067] (1) Under the condition of 40℃ water bath temperature, immerse 1g of wood pulp fiber powder in a stirred tank containing 200g of 10% sodium hydroxide solution, the stirring speed is 200rpm, the stirring time is 100min, and the water is washed until neutral. , Drying in a vacuum oven with a drying temperature of 70°C and a drying time of 10 hours to obtain alkali-treated wood pulp fiber powder;

[0068] (2) Under the condition of 50℃ water bath temperature, add the alkali-treated wood pulp fiber powder to the stirred tank containing dimethyl sulfoxide. The solid-liquid mass ratio of wood pulp fiber powder to dimethyl sulfoxide is 1 :30, stirring speed of 500rpm, stirring time of 6h, filtering, eluting the residual dimethyl sulfoxide with distilled water, and drying in a vacuum oven at a drying temperature of 65℃ and a drying time of 10h to obtain pretreated wood Pulp fiber powder;

[0069] (3) Add 1g of pretreated wood pulp fiber powder to a stirred tank containing 0.02g TEM...

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Abstract

The invention discloses a preparation method of a porous network structure fiber membrane of nano cellulose / silicon dioxide. The preparation method is characterized by comprising the following concrete steps: coating prepared cellulose nanocrystal of which the diameter is 3-10nm on the surface of an inorganic silicon dioxide nano-fiber membrane to form a network structure after modifying the cellulose nanocrystal by a surfactant, thereby the mechanical property, the filtering property and the like of the inorganic silicon dioxide fiber membrane are improved due to strong hydrogen-bond action of the cellulose. The finally obtained filter membrane has the advantages of being simple in structure, good in mechanical strength, good in filtering effect, low in cost and the like, and the preparation method has wide application prospect in the fields such as air filtering, catalysis, organisms, pharmacy, drinking water purification, textile-dyeing wastewater treatment, and PVA (polyvinyl alcohol) size recovery.

Description

Technical field [0001] The invention relates to a method for preparing a nano-cellulose / silicon dioxide porous network structure fiber membrane, which belongs to the technical field of nano-functional materials. Background technique [0002] Organic-inorganic hybrid materials are composite materials that combine inorganic materials and organic materials at the nanometer scale. There is a strong force between the two phases or an interpenetrating network structure is formed. Because it has the properties of organic polymer materials and inorganic materials, it can overcome The limitations of a single organic or inorganic material present many new characteristics in terms of optics, mechanics, electricity, and electrochemistry. Inorganic-organic hybrid materials can be roughly divided into two types: one is that organic molecules or polymers are simply embedded in an inorganic matrix, and the other is that organic components are grafted into inorganic networks through chemical bond...

Claims

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Application Information

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IPC IPC(8): D04H1/4209D04H1/728D06M15/05
Inventor 丁彬曹新旺俞建勇孙刚
Owner DONGHUA UNIV
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