Manufacturing method for modified cellulose membrane material based on ionic liquid

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...

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 overcomes many shortcomings of the heterogeneous reaction system, such as: reaction The process is long, the amount of reagents used is large, the reaction process is difficult to control, the product is uneven, etc.