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Preparation method of bacterial cellulose solution

A technology of bacterial cellulose and solution, which is applied in the field of bacterial cellulose solution, can solve the problems of toxicity and high price of LICl/DMAC system, and achieve the effects of less energy consumption, simple preparation process and high safety

Inactive Publication Date: 2010-02-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these kinds of dissolution systems have certain disadvantages. For example, [BMIM]Cl has certain toxicity, while the price of LICl / DMAC system is relatively high, so it is only suitable for laboratory research.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Measure 64mL (0.8mol) of N-methylimidazole and 98mL (1.2mol) of allyl chloride and mix them in a 250mL round-bottomed flask so that the mol ratio of N-methylimidazole to allyl chloride is 1: 1.5. Under the action of magnetic stirring, the mixture was heated in a water bath at 60° C. and refluxed. After 10 hours, a brown liquid was obtained, and the viscosity increased. Add 50 mL of diethyl ether to extract excess allyl chloride, and then use a rotary evaporator to remove excess diethyl ether. Chloro-1-allyl-3-methylimidazole ([AMIM]Cl) was obtained as a brown transparent liquid at room temperature.

[0020] According to the mass ratio of 2:100, 0.8 g of freeze-dried bacterial cellulose was weighed and put into 40 g of ionic liquid [AMIM]Cl, heated in a water bath at 90° C., and magnetically stirred until completely dissolved.

Embodiment 2

[0022] [AMIM]Cl ionic liquid was prepared as described above.

[0023] According to the mass ratio of 4:100, 1.6 g of freeze-dried bacterial cellulose was weighed and put into 40 g of ionic liquid [AMIM]Cl, heated in a water bath at 90° C., and magnetically stirred until completely dissolved.

Embodiment 3

[0025] [AMIM]Cl ionic liquid was prepared as described above.

[0026] According to the mass ratio of 5:100, 2 g of freeze-dried bacterial cellulose was weighed and put into 40 g of ionic liquid [AMIM]Cl, heated in a water bath at 90° C., and magnetically stirred until completely dissolved.

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Abstract

The invention relates to a preparation method of a bacterial cellulose solution, which comprises the following steps: (1) mixing N-methylimidazole with allyl chloride, and treating the mixture by rotary evaporation to obtain <AMIM>Cl; or mixing N-methylimidazole with 1-chlorobutane, and treating the mixture by rotary evaporation to obtain <BMIM>Cl; and (2) mixing the bacterial cellulose with the ionic liquid, and heating and stirring the mixture at 30-100 DEG C in a water bath. The invention has simple preparation processes, has no need of pretreatment of the cellulose materials, such as derivation, activation and the like, has less energy consumption and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of bacterial cellulose solution, in particular to a preparation method of bacterial cellulose solution. Background technique [0002] Bacterial cellulose (Bacterial Cellulose, BC) is extracellular cellulose produced by microorganisms, also known as microbial cellulose (Microbial Cellulose), is another kind of natural inert material synthesized by bacteria besides plant cellulose. Bacterial cellulose has the same chemical structure as plant cellulose, and both can be called β-1,4-glucan. However, compared with plant cellulose, bacterial cellulose has many incomparably superior characteristics, such as : (1) Ultra-fine fiber. Microfibers form a unique bundle of fibers with a width of about 100nm and a thickness of 3-8nm. They are nano-polar fibers and are the thinnest natural fibers at present, and their size is only 1 / 10 of that of artificial synthetic fibers; (2) The speed and yield of bacteria synthesizin...

Claims

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Application Information

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IPC IPC(8): C08J3/09C08J3/11
Inventor 洪枫李朋
Owner DONGHUA UNIV
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