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Method for preparing 4-bromine-N-ethoxy-1,8-naphthalimide fiber hydrogel

A cellulose hydrogel and naphthalimide technology, applied in the field of 4-bromo-N-hydroxyethyl-1, can solve the problems of aggregate fluorescence quenching, difficulty in direct use, strong molecular mobility, etc., and achieve Simple operation, convenient processing, and the effect of ensuring product quality

Inactive Publication Date: 2018-03-23
SHAANXI YIPINDA PETROCHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these derivatives are poor in water solubility, strong molecular mobility and easy to form aggregates for fluorescence quenching, making them difficult to use directly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The preparation method of 4-bromo-N-hydroxyethyl-1,8-naphthalimide cellulose hydrogel of the present invention comprises the following steps:

[0013] The first step, the preparation of 4-bromo-N-hydroxyethyl-1,8-naphthalimide, was added to a 50 mL three-necked flask by adding 1.35 g of 4-bromo-1,8-naphthalene anhydride and 30 mL of anhydrous Ethanol was dissolved under nitrogen protection with magnetic stirring, heated to reflux, and 1.2 g ethanolamine was added dropwise. After reacting for 2 hours, suction filtered while it was hot, and the filtrate was cooled to room temperature. The precipitate was precipitated, filtered with suction, and the precipitate was recrystallized with ethanol. After drying, yellow powdery 4-bromo-N-hydroxyethyl-1,8-naphthalimide was obtained;

[0014] The second step, the preparation of 4-bromo-N-hydroxyethyl-1,8-naphthoimide cellulose hydrogel, configure sodium hydroxide and urea water composite solvent system, pre-cool to -12 ° C, add ma...

Embodiment 2

[0017] The preparation method of 4-bromo-N-hydroxyethyl-1,8-naphthalimide cellulose hydrogel of the present invention comprises the following steps:

[0018] The first step, the preparation of 4-bromo-N-hydroxyethyl-1,8-naphthalimide, was added to a 50 mL three-necked flask by adding 1.35 g of 4-bromo-1,8-naphthalene anhydride and 30 mL of anhydrous Ethanol was dissolved under nitrogen protection with magnetic stirring, heated to reflux, and 1.2 g ethanolamine was added dropwise. After reacting for 2 hours, suction filtered while it was hot, and the filtrate was cooled to room temperature. The precipitate was precipitated, filtered with suction, and the precipitate was recrystallized with ethanol. After drying, yellow powdery 4-bromo-N-hydroxyethyl-1,8-naphthalimide was obtained;

[0019] The second step, the preparation of 4-bromo-N-hydroxyethyl-1,8-naphthoimide cellulose hydrogel, configure sodium hydroxide and urea water composite solvent system, pre-cool to -12 ° C, add ma...

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Abstract

The invention discloses a method for preparing 4-bromine-N-ethoxy-1,8-naphthalimide fiber hydrogel and relates to the field of cellulose hydrogel preparation. The method comprises the following steps:preparing 4-bromine-N-ethoxy-1,8-naphthalimide, putting 1.35g of 4-bromine-1,8-anhydride naphthalene and 30mL of absolute ethyl alcohol into a 50mL three-mouth flask, in the presence of nitrogen, performing magnetic stirring dissolution, heating to backflow, dropwise adding 1.2g of ethanol amine, performing a reaction for 2 hours, performing hot sucking filtration, leaving the filtrate to stand and cool to the room temperature, separating out precipitate, performing suction filtration, recrystallizing the precipitate with ethanol, and drying, thereby obtaining yellow powder 4-bromine-N-ethoxy-1,8-naphthalimide. The method is simple to operate and convenient to process, in addition, the product quality can be ensured, and the product quality can be improved.

Description

technical field [0001] The invention relates to the field of cellulose hydrogel preparation, in particular to a preparation method of 4-bromo-N-hydroxyethyl-1,8-naphthalimide cellulose hydrogel. Background technique [0002] Cellulose is a cheap and easy-to-obtain natural polymer biomass resource, and the alkali urea system shows its unique advantages in the field of preparing new functional materials. Cellulose hydrogels with a porous structure can be constructed by adding a cross-linking agent to the cellulose alkali urea solution. Many natural polymer-based gel materials with different functions have been successfully prepared using this as a carrier. [0003] 1,8-Naphthimide derivatives are an important class of organic fluorescent substances, which have good fluorescent properties and relatively easy to modify functional groups, so they are widely used in liquid crystal displays, fluorescent whitening agents, metal probes and other fields Yi. However, most of these de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08B15/06C08L1/08
CPCC08J3/075C08B15/06C08J2301/08
Inventor 李长英
Owner SHAANXI YIPINDA PETROCHEM CO LTD