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Nanocellulose/soybean protein composite filter material and preparation method and purposes thereof

A nanocellulose, soybean protein technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problems of low functionality, not green environmental protection, low pressure drop, etc., to reduce harm, high filtration efficiency, low pressure drop Effect

Active Publication Date: 2016-08-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the air filter material with polyacrylonitrile as the main raw material has good air filtration efficiency and low pressure drop, but as a synthetic polymer material, polyacrylonitrile is not green and environmentally friendly, and has low functionality. Particles have a high filtration efficiency

Method used

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  • Nanocellulose/soybean protein composite filter material and preparation method and purposes thereof
  • Nanocellulose/soybean protein composite filter material and preparation method and purposes thereof

Examples

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preparation example Construction

[0033] A kind of preparation method of nanocellulose / soybean protein composite filter material of the embodiment of the present invention is " solution processing method ", comprises the following steps:

[0034] Step 1. Prepare soybean protein emulsion; add soybean protein powder with a mass fraction of 1%-15% into deionized water, and stir at room temperature for 20-120 min to form soybean protein emulsion;

[0035] Step 2, pretreating the nano-bacterial cellulose membrane; washing the nano-bacterial cellulose membrane with clear water to remove the surface medium and impurities; then soaking the nano-bacterial cellulose membrane in 0.02-0.04mol / L NaOH solution, Boil at 90-100°C for 10-500 minutes to remove bacteria and residual medium in the liquid film; rinse with distilled water several times, use pH test paper to lightly press the liquid film to measure the pH value, the pH range is 7.1-7.5, and the nanobacteria are obtained Cellulose membrane; then centrifuge the pretre...

Embodiment 1

[0042] The commercially available bacterial cellulose produced by Acetobacter xylinum was cut into 6×10 cm bacterial cellulose samples.

[0043] Step 1, the preparation of soybean protein solution;

[0044] Weigh a certain amount of soybean protein isolate powder, add deionized water according to the proportion of 5% mass fraction, stir at room temperature for 40 minutes, and perform ultrasonic treatment for 30 minutes;

[0045] Step 2, pretreatment of nanocellulose membrane;

[0046] Take the nano bacterial cellulose (BC) film and cut it into a certain size according to the size of the mold, wash it with water several times to remove the medium and impurities on the surface of the film, then soak the film in 0.02mol / L NaOH solution, cook at 100°C for 100min, remove Bacteria and residual culture medium in the liquid film, the film is milky white and translucent at this time; rinse with distilled water several times, use pH test paper to lightly press the film to measure the p...

Embodiment 2

[0050] Step 1, the preparation of soybean protein solution;

[0051] Weigh a certain amount of soybean protein isolate powder, add deionized water according to the proportion of 10% by mass fraction, and add acrylic acid according to the proportion of 3% by mass fraction, and stir at room temperature for 60 minutes.

[0052] Step 2, pretreatment of nanocellulose membrane;

[0053] Take the nano bacterial cellulose (BC) film and cut it into a certain size according to the size of the mold, wash it with water several times to remove the medium and impurities on the surface of the film, then soak the film in 0.02mol / L NaOH solution, cook at 100°C for 100min, remove Bacteria and residual culture medium in the liquid film, the film is milky white and translucent at this time; rinse with distilled water several times, use pH test paper to lightly press the film to measure the pH value, about 7.1, and obtain the BC film; Break into a slurry state for later use;

[0054] Step 3, pre...

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Abstract

The invention relates to the technical field of biological composite materials and discloses a nanocellulose / soybean protein composite filter material .The nanocellulose / soybean protein composite filter material comprises nano bacterial cellulose and soybean protein .The nano bacterial cellulose serves as a substrate, and functional groups of the soybean protein are tightly combined with the nano bacterial cellulose .The composite filter material can contain polylactic acid .Functional groups of polylactic acid are tightly combined with the nano bacterial cellulose .The bacterial cellulose is centrifuged or subjected to freeze drying or smashing .Emulsion prepared from the soybean protein is ultrasonically treated and smashed or chemically modified .The invention further discloses a method for preparing the composite filter material .The composite filter material and the method have the advantages that the advantages of being high in filter efficiency, low in pressure drop, degradable, environmentally friendly, simple in preparation method, adjustable in sample functionality, wide in application range and the like are achieved, and particulate pollutants, bacteria and germs can be filtered out; by adjusting the ratio of the raw materials, adopting a proper process and adding antibacterial activity matter, the functions of the composite material can be adjusted and enhanced, and the composite filter material is suitable for different environments and different purposes .

Description

technical field [0001] The invention relates to the technical field of biocomposite materials, in particular to a nanocellulose / soybean protein composite filter material, a preparation method and an application thereof. Background technique [0002] Soybean protein is a natural plant protein with wide sources, low cost, environmental protection, easy recycling, and contains a large number of active functional groups. After proper treatment, these functional groups can effectively interact with some natural materials with polar molecules such as nano-bacterial cellulose. At the same time, nano-bacterial cellulose has a three-dimensional network structure, which can be used in different fields to achieve various functions after different treatments by taking advantage of its natural structure. [0003] In China, air pollution is a serious problem in many regions. In order to reduce the degree of air pollution, people hope to use air filter materials to create a cleaner air ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/02B01D67/00B01D71/10B01D71/74B01D71/48
CPCB01D67/0079B01D69/02B01D69/12B01D71/10B01D71/48B01D71/74B01D2325/48
Inventor 郑裕东刘晓冰乔爽芦海洋郝晓帅李中正
Owner UNIV OF SCI & TECH BEIJING
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