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A kind of O-succinate chitosan Schiff base and preparation method thereof

A kind of technology of succinic acid chitosan mat and succinic acid chitosan, applied in the preparation of above-mentioned O-succinic acid chitosan Schiff base, O-succinic acid chitosan Schiff base field, can Solve the problems of more synthesis and less research, and achieve the effect of improving water solubility, good corrosion inhibition, and enriching functional active groups

Active Publication Date: 2019-06-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the synthesis of N-succinoyl chitosan is more, and the research on O-succinate chitosan Schiff base derivatives is less

Method used

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  • A kind of O-succinate chitosan Schiff base and preparation method thereof
  • A kind of O-succinate chitosan Schiff base and preparation method thereof
  • A kind of O-succinate chitosan Schiff base and preparation method thereof

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preparation example Construction

[0031] The present invention also provides a preparation method of the above-mentioned O-succinic acid chitosan Schiff base, which comprises the following steps:

[0032] Step 1. Prepare benzaldehyde chitosan Schiff base. The specific process is: Step 1.1, take 1 part of chitosan, the molecular weight of chitosan is 700,000, the degree of deacetylation is 87%, and it is dissolved in 1% In wt acetic acid solution, the pH of the solution was adjusted to 7 with 1mol / L sodium hydroxide, filtered with suction and washed with ethanol to obtain a filter cake; step 1.2, add the filter cake to the ethanol solution at 70℃ , Use 1mol / L hydrogen chloride or 1mol / L sodium hydroxide solution to adjust its pH to 6, and then add 1.3 parts of benzaldehyde dissolved in ethanol solution, after reaction for 4h, suction filtration and washing with ethanol to obtain benzaldehyde shell poly Sugar Schiff base.

[0033] Step 2. Take 0.5 parts by mass of benzaldehyde chitosan Schiff base, mix it with 30 pa...

Embodiment 1

[0038] The specific process of preparing O-succinic acid chitosan Schiff base is:

[0039] Step 1. Prepare benzaldehyde chitosan Schiff base. The specific process is: Step 1.1, take 1g of chitosan, the molecular weight of chitosan is 700,000, and the degree of deacetylation is 87%. Dissolve it in 50ml. In a 1% wt acetic acid solution, stir at room temperature for 20 minutes, then use 1 mol / L sodium hydroxide to adjust the pH of the solution to 7, suction filtration and wash with ethanol to obtain a filter cake; step 1.2, add ethanol to the filter cake In the solution, use 1mol / L hydrogen chloride to adjust its pH to 6 at 70℃, then add dropwise 20ml ethanol solution with 1.3g benzaldehyde dissolved in it, react for 4h, filter with suction and wash with ethanol to obtain the benzaldehyde shell Glycan Schiff base.

[0040] Step 2, 0.5g of benzaldehyde chitosan Schiff base obtained in step, mix it with 30ml dichloromethane solution and 1ml acid binding agent solution, the acid binding...

Embodiment 2

[0045] The specific process of preparing O-succinic acid chitosan Schiff base is:

[0046] Step 1. Prepare benzaldehyde chitosan Schiff base. The specific process is: Step 1.1, take 1g of chitosan, the molecular weight of chitosan is 700,000, and the degree of deacetylation is 87%. Dissolve it in 50ml. In a 1% wt acetic acid solution, stir at room temperature for 20 minutes, then use 1 mol / L sodium hydroxide to adjust the pH of the solution to 7, suction filter and wash with ethanol to obtain a filter cake; step 1.2, add the filter cake to 40 ml In the ethanol solution, use 1 mol / L hydrogen chloride or 1 mol / L hydrogen chloride solution to adjust its pH to 6 at 70°C, then add dropwise 20 ml of ethanol solution in which 1.3 g benzaldehyde is dissolved, and after reacting for 4 hours, after suction filtration Wash with ethanol to obtain benzaldehyde chitosan Schiff base.

[0047] Step 2, 0.5g of benzaldehyde chitosan Schiff base obtained in step, mix it with 30ml of dichloromethane ...

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Abstract

The invention discloses an O-butanedioic acid chitosan Schiff base and a preparing method thereof. The degree of substation of O-butanedioic acid in O-butanedioic acid chitosan Schiff base is 0.20-0.65, and the degree of substation of N-bit benaldehyde is 0-0.60; meanwhile, through an esterification reaction of benaldehyde chitosan Schiff base and butanedioic anhydride, O-butanedioic acid chitosan Schiff base is obtained. The O-butanedioic acid chitosan Schiff base simultaneously has the advantages of both Schiff base and chitosan, modification is made on chitosan through a method of chemical modification, active groups of chitosan are increased and the water solubility of chitosan is improved, thus the condition in which O-butanedioic acid chitosan Schiff base is applied is wider, and the performance of O-butanedioic acid chitosan Schiff base is improved.

Description

Technical field [0001] The invention belongs to the field of fine chemicals, and relates to an O-succinic acid chitosan Schiff base; the invention also relates to a preparation method of the above O-succinic acid chitosan Schiff base. Background technique [0002] Chitin is the second largest natural organic polymer compound in nature after cellulose. Chitosan is a product obtained by deacetylation of chitin. It is the most important derivative of chitin. Its chemical name is ( 1,4)-2-Amino-2-deoxy-β-D-glucose or polyglucosamine for short. Because chitosan is harmless to the human body and will not cause secondary pollution to the environment, it has a wide range of sources, is non-toxic and tasteless, and has good biodegradability. Therefore, it has a wide range of uses in water treatment, food, medicine and other industries. The amide group and amino group contained in the main chain give it a series of special functions and properties. When applied to water treatment, chitos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/08
CPCC08B37/003
Inventor 郭睿郭煜土瑞香马兰李云鹏王映月宋博王宁
Owner SHAANXI UNIV OF SCI & TECH
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