Preparation method of nanocellulose/filter paper composite filter membrane material

A technology of nanocellulose and composite filtration, applied in chemical instruments and methods, ultrafiltration, membrane technology, etc., can solve problems such as high cost and complicated preparation process, achieve low production cost, improve adsorption and filtration capacity, and reduce cost Effect

Active Publication Date: 2018-01-16
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with the present invention, the preparation process of the above-mentioned invention is relatively complicated, and the cost is also relatively high

Method used

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  • Preparation method of nanocellulose/filter paper composite filter membrane material
  • Preparation method of nanocellulose/filter paper composite filter membrane material
  • Preparation method of nanocellulose/filter paper composite filter membrane material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation method of nanocellulose / filter paper composite filter membrane material, concrete steps are as follows:

[0034] 1) Preparation of nanocellulose dispersion

[0035] Weigh 1g of dry weight cellulose sample of hardwood bleached wood pulp, 0.1g of sodium bromide, 0.016g of TEMPO and 100mL of distilled water into a beaker, stir evenly, and fully dissolve. Add 6 mmol sodium hypochlorite to the system, add dropwise 5M hydrochloric acid to adjust the overall system pH to 10, and start oxidation. Use MM-60R type automatic titrator to automatically drop 0.5M sodium hydroxide solution to maintain the overall system pH at 10. When the system hardly consumes the sodium hydroxide solution, add a small amount of absolute ethanol to terminate the reaction, add 0.5M hydrochloric acid to adjust the pH to neutral, and obtain oxidized cellulose for use. Take 0.1g dry weight of oxidized cellulose and add it into 100mL distilled water for homogenization, ultrasonic operati...

Embodiment 2

[0041] The preparation of nanocellulose / filter paper composite filter membrane material, the method is the same as in Example 1, wherein, in step 1), the bleached wood pulp of the cellulose sample broad-leaved wood adopts softwood bleached wood pulp, bleached straw pulp, or bleached bamboo pulp. an alternative.

Embodiment 3

[0043] The preparation of nanocellulose / filter paper composite filter membrane material, the method is the same as in Example 1, wherein, in step 2), the nanocellulose dispersion with a concentration of 0.05% adopts a concentration of 0.1%, 0.2%, and 0.3% nanocellulose Either of the dispersions can be substituted.

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Abstract

The invention discloses a preparation method of a nanocellulose/filter paper composite filter membrane material. The preparation method comprises steps: 1) nanocellulose is prepared from a cellulose material through TEMPO oxidation in combination with a mechanical treatment method; 2) nanocellulose and a substrate filter paper are subjected to layered compositing with a vacuum suction filtration method, and the nanocellulose/filter paper layered compositing filter membrane material is prepared; or nanocellulose and filter paper pulp are composited in an embedded manner with a papermaking process, and the nanocellulose/filter paper embedded compositing filter membrane material is prepared. The performance controllability of a compound ultrafiltration membrane and a micro-filtration membranematerial is realized by controlling the morphology size of nanocellulose, the compositing manner (layered/embedded) of nanocellulose and ordinary filter paper (filter paper pulp) and the drying manner. The composite filter membrane material contains electronegative nanocellulose and has filter performance, the adsorption capability of tiny microparticles can be effectively improved, and the filtration efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of filter membrane materials, and in particular relates to a preparation method of a nanocellulose / filter paper (filter paper pulp) composite filter membrane material. Background technique [0002] With the development of science and technology and the deterioration of the ecological environment, material separation has become one of the most important research topics. As a very efficient separation technology, membrane separation technology emerged and developed rapidly after the 1960s. Compared with traditional separation methods such as filtration, distillation, and evaporation crystallization, it has the advantages of no phase change, low energy consumption, high efficiency, simple technology, sustainable operation at room temperature, green and pollution-free, etc. It has a wide range of applications in petrochemical, metallurgy, electronics, bioengineering, medical and health and other fields. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/10B01D69/12B01D67/00B01D61/14
Inventor 王志国张文文张丽君范一民俞娟
Owner NANJING FORESTRY UNIV
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