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Preparation method of bacterial cellulose membrane for oil-water separation and with pore diameter adjusted by potato starch

A bacterial cellulose membrane and bacterial cellulose technology, applied in the field of oil-water separation, can solve problems such as low separation efficiency and secondary environmental pollution, and achieve the effects of strong biodegradability, high oil-water separation efficiency, and simple and economical way to obtain raw materials.

Active Publication Date: 2020-12-25
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional oil-water separation is achieved by incineration and physical and chemical methods, but it is easy to cause secondary pollution to the environment, and the separation efficiency is low, which cannot meet people's needs

Method used

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  • Preparation method of bacterial cellulose membrane for oil-water separation and with pore diameter adjusted by potato starch
  • Preparation method of bacterial cellulose membrane for oil-water separation and with pore diameter adjusted by potato starch
  • Preparation method of bacterial cellulose membrane for oil-water separation and with pore diameter adjusted by potato starch

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preparation example Construction

[0026] A preparation method utilizing potato starch to regulate the pore size of bacterial cellulose membrane for oil-water separation, comprising the following steps:

[0027] 1. Prepare bacterial cellulose / starch film medium:

[0028] Weigh 25g of glucose, 7.5g of yeast extract, 10g of tryptone, and 10g of disodium hydrogen phosphate in 950mL of water, stir to dissolve, adjust the pH to 6.0 with glacial acetic acid, and dilute to 1L. Then, take by weighing 0g, 0.5g, 1g, 1.5g, 2g, 2.5g potato starch respectively in the Erlenmeyer flask of 250mL, subpackage in the above-mentioned Erlenmeyer flask that starch of different quality has been housed in substratum, each Erlenmeyer flask Add 100mL medium, pregelatinize at 80°C for 20 minutes, and sterilize at 115°C for 30 minutes to obtain medium with starch content of 0%, 0.5%, 1%, 1.5%, 2%, and 2.5%. .

[0029] 2. Preparation of 0.9% normal saline:

[0030] Sodium chloride 9g, add a certain amount of MilliQ water, stir until dis...

Embodiment 1

[0043] The pretreated bacterial cellulose / starch film with a starch content of 0% was placed in a 10% tetraethyl orthosilicate / ethanol solution, stirred for 4 hours, the sample was taken out, washed repeatedly with 75% (v / v) alcohol, and then placed in NH 3 ·H 2After stirring in O / ethanol solution for 1 h, it was washed several times with 75% (v / v) ethanol, and soaked in deionized water to exchange the solvent. The bacterial cellulose / silica membrane obtained in the above steps was freeze-dried for 24 hours.

[0044] Use hexadecyltrimethoxysilane / ethanol solution (3wt%) to soak for 2 hours at 50° C. to endow it with hydrophobicity.

Embodiment 2

[0046] The pretreated bacterial cellulose / starch film with a starch content of 0.5% was placed in 10% tetraethyl orthosilicate / ethanol solution, stirred for 4 hours, the sample was taken out, washed repeatedly with 75% (v / v) alcohol, and then placed in NH 3 ·H 2 After stirring in O / ethanol solution for 1 h, it was washed several times with 75% (v / v) ethanol, and soaked in deionized water to exchange the solvent. The bacterial cellulose / silica membrane obtained in the above steps was freeze-dried for 24 hours.

[0047] Use hexadecyltrimethoxysilane / ethanol solution (3wt%) to soak for 2 hours at 50° C. to endow it with hydrophobicity.

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Abstract

The invention discloses a preparation method of a bacterial cellulose membrane for oil-water separation and with the pore diameter adjusted by potato starch. The invention discloses a novel bacterialcellulose / silicon dioxide / hexadecyltrimethoxysilane oil-water separation composite membrane with good oil-water separation capability and high biodegradability, and a preparation method thereof, and belongs to the technical field of functional materials. The preparation method comprises the following steps: (1) culturing and purifying a bacterial cellulose / starch membrane; (2) preparing an ethyl orthosilicate / ethanol solution and a hexadecyl trimethoxy silane / ethanol solution; and (3) preparing the bacterial cellulose / silicon dioxide / hexadecyltrimethoxysilane oil-water separation composite membrane. The preparation method is simple, compared with a traditional oil-water separation mode, the prepared composite membrane not only has good oil-water separation capacity, but also has a series of advantages of high biodegradability, no toxicity or harm, shape plasticity and the like, and technical support is provided for saving water and oil resources and protecting the environment.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a method for regulating the pore size of bacterial cellulose by using potato starch for oil-water separation. Background technique [0002] Nowadays, the problem of environmental pollution is becoming more and more serious. Under the background of extreme shortage of fresh water resources, a large amount of water is discharged into the environment along with industrial oil. The traditional oil-water separation method is easy to cause secondary environmental pollution due to low treatment efficiency, weak oil absorption, and Disadvantages such as poor recyclability have been gradually abandoned by the market. The development of efficient and economical oil-water separation materials has become a hot topic. The β-1,4-D glucan chains in bacterial cellulose are strongly associated through hydrogen bonds, making bacterial cellulose a high chemical purity, high degree of ...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08L1/02C08L3/02C08K5/5419C08K3/36B01D69/12B01D67/00B01D17/022C12P19/04C12R1/01
CPCC08J9/28B01D69/12B01D67/0002B01D17/02C12P19/04C08J2301/02C08J2403/02C08K5/5419C08K3/36
Inventor 钟成李波王凤萍秦晓彤谢燕燕贾士儒
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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