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Method for preparing acetylated-modified bacterial cellulose aerogel oil-absorbent material

A technology of bacterial cellulose and bacterial cellulose membrane is applied in the field of preparation of acetylated modified bacterial cellulose aerogel oil-absorbing materials, and achieves the effects of high affinity, regular microstructure and fine diameter

Active Publication Date: 2014-08-13
HARBIN INST OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At present, there is no report on the use of bacterial cellulose aerogels as oil-absorbing materials at home and abroad.

Method used

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specific Embodiment approach 1

[0029] Specific Embodiment 1: In this embodiment, bacterial cellulose microfibrils are used for acetylation modification, then dissolved to form bacterial cellulose hydrogel, and then bacterial cellulose aerogel is prepared, which is acetylated modified bacterial cellulose Airgel can be used as an oil-absorbing material for marine oil spills. The specific operation steps are as follows:

[0030] 1. Bacterial cellulose cultivation

[0031] (1) Kombucha liquid subculture medium: the medium is composed of agar, the carbon source is glucose, the nitrogen source is yeast powder and tryptone; the ratio is glucose 5g, yeast powder 1g, agar 2g, CaCO 3 2 g, 100 ml deionized water, and adjust the pH of the medium to 6.8. Scrub the large-mouth glass bottle twice with alcohol, and then boil it in boiling water for two minutes to remove as much bacteria and cleaning agent alcohol as possible to prevent Acetobacter xylinum from being polluted.

[0032] (2) Kombucha was subculture...

specific Embodiment approach 2

[0041] Specific embodiment two: In this embodiment, the acetylated bacterial cellulose airgel oil-absorbing material is prepared according to the following steps:

[0042] 1. Bacterial cellulose cultivation

[0043] (1) Kombucha liquid subculture medium: the medium is composed of agar, the carbon source is glucose, the nitrogen source is yeast powder and tryptone; the ratio is glucose 5g, yeast powder 1g, agar 2g, CaCO 3 2 g, 100 ml of deionized water, and adjust the pH of the medium to 7.0. Scrub the large-mouth glass bottle twice with alcohol, and then boil it in boiling water for two minutes to remove as much bacteria and cleaning agent alcohol as possible to prevent Acetobacter xylinum from being polluted.

[0044] (2) Kombucha was subcultured with bacterial liquid, and an appropriate amount of bacterial liquid was taken from the kombucha liquid (purchased from Yijun Shijia), and inoculated into 100mL fermentation medium with a 20% inoculation amount, and culture...

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Abstract

The invention discloses a method for preparing an acetylation-modified bacterial cellulose aerogel oil-absorbent material and relates to a method for preparing an oil-absorbent material. The invention aims to provide a method for preparing an acetylation-modified bacterial cellulose aerogel oil-absorbent material and the novel oil absorbent material is prepared by carrying out acetylation surface modification on the bacterial cellulose aerogel. The preparation method comprises the following steps of firstly culturing the bacterial cellulose; secondly, acetylating the bacterial cellulose microfibrils; and thirdly, preparing the hydrophobic acetylated bacterial cellulose aerogel. The acetylation-modified bacterial cellulose aerogel oil-absorbent material provided by the invention has the advantages of simple preparation method, novel design, environment friendliness, good biocompatibility and reusability and high absorption efficiency. The oil-absorbent material has very high affinity to oil, no absorption capability to water, good phase selectivity, can absorb leaked and spilled oil and organic solvents in water and can be used as an oil-water separation material. The oil-absorbent material is easily biodegradable and causes almost no pollution to the water body.

Description

technical field [0001] The invention relates to a preparation method of an oil-absorbing material, in particular to a preparation method of an acetylated modified bacterial cellulose airgel oil-absorbing material. Background technique [0002] In recent years, with the increasing development of offshore oil resources, oil spill accidents have been increasing. Similar oil spills happen every year in the world. With the acceleration of industrial society, my country's oil pollution is becoming more and more serious. On May 5, 2010, the crude oil spill in the Gulf of Mexico in the United States attracted great attention from the international community. An oil drilling platform on the coast of Louisiana in the southern United States caught fire and exploded at around 10 pm local time on April 20, 2010, causing 7 serious injuries. , At least 11 people were missing. It was not until July 15, 2010 that BP announced that the new oil control device had successfully covered the unde...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08L1/12C08B3/06C12P19/04C09K3/32
Inventor 刘宇艳刘振国王永臻谢志民
Owner HARBIN INST OF TECH
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