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Modified beta-cyclodextrin grafted nitrocellulose and preparation method thereof

A technology of nitrocellulose and cyclodextrin, which is applied in the field of modified β-cyclodextrin grafted nitrocellulose and its preparation, can solve the problems of high content of organic volatiles and poor environmental performance, and achieve improved environmental performance, The effect of less steps and simple preparation method

Inactive Publication Date: 2017-09-15
郑茗心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high content of organic volatiles in ordinary nitrocellulose, the environmental performance of coatings and printing inks prepared by it is poor.
At present, there is no related technology to improve the environmental protection of nitrocellulose itself by modifying it to have the ability to absorb harmful substances in the environment.

Method used

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  • Modified beta-cyclodextrin grafted nitrocellulose and preparation method thereof

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preparation example Construction

[0020] The invention provides a method for preparing modified β-cyclodextrin grafted nitrocellulose, comprising the following steps:

[0021] (1) reacting β-cyclodextrin and N-methylolacrylamide in an acidic solution to obtain β-cyclodextrin-N-methylolacrylamide;

[0022] (2) The β-cyclodextrin-N-methylolacrylamide, nitrocellulose, and ammonium cerium nitrate obtained in the step (1) are grafted in a nitric acid solution to obtain a modified β-cyclodextrin grafted nitrocellulose.

[0023] The invention reacts β-cyclodextrin and N-methylolacrylamide in an acidic solution to obtain β-cyclodextrin-N-methylolacrylamide. In the present invention, the mass ratio of the β-cyclodextrin, N-methylolacrylamide and the acidic solution is preferably 1:0.5~1:2~3, more preferably 1:0.6~0.8:2; The mass fraction of the acid in the acidic solution is preferably 1-3%, more preferably 1.5-2.5%.

[0024] The present invention has no special requirements on the order of adding β-cyclodextrin, N-...

Embodiment 1

[0042] Add β-cyclodextrin, N-methylolacrylamide, and dilute hydrochloric acid aqueous solution (1% by mass fraction) into a three-necked flask equipped with a stirrer, a condenser, and a feeding device in a mass ratio of 1:0.8:2 In the mixture, mix well at 80°C, keep warm for 10 minutes, after the reaction is completed, mix the reaction liquid with acetone (the volume ratio of the reaction liquid and acetone is 1:1) and let stand at 5°C for 12 hours to allow the product to precipitate naturally. After static filtration, the product was fully washed with acetone and dried in a vacuum oven at 30°C for 12 hours to obtain β-cyclodextrin-N-methylolacrylamide;

[0043] Under the protection of nitrogen, add nitrocellulose, β-cyclodextrin-N-methylolacrylamide, and dilute nitric acid aqueous solution (1% by mass fraction) into the agitator with a mass ratio of 1:8:100. , condenser, the three-necked flask of feeding device, the added ceric ammonium nitrate (controlling the concentration...

Embodiment 2

[0047] Add β-cyclodextrin, N-methylolacrylamide, and dilute hydrochloric acid aqueous solution (1% by mass fraction) into a three-necked flask equipped with a stirrer, a condenser, and a feeding device according to a mass ratio of 1:0.98:2 In the process, mix well at 70°C, keep warm for 10 minutes, after the reaction is completed, mix the reaction liquid with acetone (the volume ratio of the reaction liquid and acetone is 1:1) and then let it stand at 5°C for 14 hours to allow the product to precipitate naturally. Static filtration, the product was fully washed with acetone and dried in a vacuum oven at 40°C for 20 hours to obtain β-cyclodextrin-N-methylolacrylamide;

[0048] Under the protection of nitrogen, add nitrocellulose, β-cyclodextrin-N-methylolacrylamide, and dilute nitric acid aqueous solution (1% by mass fraction) into the agitator with a mass ratio of 1:12:100. , condenser, and the three-necked flask of the feeding device, add ceric ammonium nitrate (control the c...

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Abstract

The invention provides modified beta-cyclodextrin grafted nitrocellulose and a preparation method thereof. The preparation method comprises the following steps: reacting beta-cyclodextrin and N-hydroxymethyl acrylamide in an acidic solution at first to obtain beta-cyclodextrin-N-hydroxymethyl acrylamide; and carrying out grafting reaction on the beta-cyclodextrin-N-hydroxymethyl acrylamide, nitrocellulose and ceric ammonium nitrate in a salpeter solution to obtain the modified beta-cyclodextrin grafted nitrocellulose. The beta-cyclodextrin is modified by the N-hydroxymethyl acrylamide, so that the modified beta-cyclodextrin has a functional group which is grafted with the nitrocellulose; the beta-cyclodextrin is successfully grafted on the nitrocellulose; the grafted nitrocellulose has the original characteristics, and further has ability of absorbing environmental harmful substances and deodorizing of the beta-cyclodextrin; and the environmental protection performance of the nitrocellulose is improved.

Description

technical field [0001] The invention relates to the technical field of environmental protection materials, in particular to a modified β-cyclodextrin grafted nitrocellulose and a preparation method thereof. Background technique [0002] Nitrocellulose, also known as nitrocellulose, is the product of the esterification reaction between cellulose and nitrate. It is a white fibrous polymer that is resistant to water, dilute acid, weak alkali and various oils. Nitrocellulose is widely used in the civil field to prepare coatings, inks, celluloid, etc. However, due to the high content of organic volatiles in ordinary nitrocellulose, the environmental performance of coatings and inks prepared from it is poor. [0003] At present, people mainly modify nitrocellulose with alkyd resin, acrylate, polyurethane, silicone and other modifiers, and prepare it into water-based nitrocellulose emulsion, so as to achieve the purpose of reducing the content of organic volatiles and improving it...

Claims

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Application Information

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IPC IPC(8): C08B5/04C08G81/00
CPCC08B5/04C08G81/00
Inventor 郑茗心李世影
Owner 郑茗心
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