Manufacturing method for modified cellulose membrane material based on ionic liquid

A technology of ionic liquid and cellulose membrane, applied in the field of production of modified cellulose membrane materials, can solve the problems of difficult control of the reaction process, large amount of reagents used, uneven products, etc., and achieve fast reaction speed, energy consumption and cost Effects of low and significant economic and environmental benefits

Inactive Publication Date: 2014-02-19
NANKAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of ionic liquids makes cellulose, a cheap and easy-to-obtain material, show great application prospects in the preparation of high-value cellulose modified materials. The homogeneous reaction system o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for making a modified cellulose membrane material based on an ionic liquid, the steps are as follows:

[0021] 1) Dissolution of cellulose

[0022] Add 1.5g of cellulose, that is, straw, into 30g of 1-allyl-3-ethylimidazolium acetate ionic liquid, and dissolve it at a constant temperature of 80°C under strong magnetic stirring at a rotational speed of 1200r / min. The liquid solution appears black field under the polarizing microscope, then add cellulose, repeat the above process until the ionic liquid solution of cellulose reaches saturation, and obtain the cellulose / ionic liquid system;

[0023] 2) Modification of cellulose in ionic liquid system

[0024] Add 30ml of acetylation modification reagent acetic anhydride and 0.225g of catalyst iodine to the above cellulose / ionic liquid system, and then place it in an oil bath at 80°C for modification reaction. The reaction time is 100min, and the magnetic stirring promotes the complete reaction. get the reaction s...

Embodiment 2

[0029] A method for making a modified cellulose membrane material based on an ionic liquid, the steps of which are basically the same as in Example 1, except that the modification reaction time in step 2) is 60 minutes, and the prepared modified cellulose membrane material .

[0030] The method can efficiently utilize cellulose raw materials to produce acetylated cellulose, and the degree of substitution is 1.86.

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PUM

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Abstract

The invention discloses a manufacturing method for a modified cellulose membrane material based on ionic liquid. The manufacturing method comprises the following steps: adding cellulose into 1-allyl-3-ethyl imidazole acetate ionic liquid to obtain a cellulose/ionic liquid system; adding the cellulose/ionic liquid system into an acetic anhydride and iodine oil bath for modification reaction for 60-100 min to obtain reaction liquid; allowing a glass plate to be uniformly coated with the reaction liquid, spraying an ethanol solution onto a thin film separated out by the cellulose until the thin film is colorless, and drying the thin film in vacuum to obtain the modified cellulose membrane material. The manufacturing method has the advantages that the preparation method is easy to operate, high in reaction speed, low in energy consumption and cost, safe and reliable; the substitution degree of the acetylized cellulose can be effectively controlled by controlling the reaction time; cyclic utilization can be realized through high-efficiency recycling of the ionized liquid; due to the implementation of the method, high utilization value of biomass can be realized, and outstanding economical and social benefits can be achieved.

Description

technical field [0001] The invention relates to the field of environmental protection materials, in particular to a method for manufacturing a modified cellulose membrane material based on ionic liquid. Background technique [0002] Biomass refers to various organisms produced through photosynthesis using inorganic substances. The solar energy converted through photosynthesis is 40 times the current total energy consumption of human beings. It can be seen that biomass energy is a huge energy treasure house. This patent utilizes biomass rich in cellulose such as straws and trees in the agricultural and forestry production process. This kind of biomass has the characteristics of renewable, low pollution and wide distribution. [0003] There are a lot of hydrogen bonds inside the cellulose molecule, it is insoluble in most organic solvents, and its processing performance is poor. In order to solve the problem of difficult cellulose processing, people have developed a varie...

Claims

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Application Information

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IPC IPC(8): C08B3/06C08J5/18
Inventor 刘益良李维尊鞠美庭邵超峰韩国林焦世英刘乐江洋候其东朱明新王雁南蔡昀昭
Owner NANKAI UNIV
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