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Amino cellulose and preparation method thereof

A cellulose and amino technology, applied in the field of amino cellulose and its preparation, can solve the problems of complex production process, harsh reaction conditions, long time consumption, etc., and achieve the effects of expanding the scope of application, improving added value and high yield

Active Publication Date: 2021-06-04
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the reported preparation methods of aminocellulose have the disadvantages of complex production process, long time consumption, harsh reaction conditions and high production cost.

Method used

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  • Amino cellulose and preparation method thereof
  • Amino cellulose and preparation method thereof
  • Amino cellulose and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Utilize ethyl cellulose to prepare amino cellulose

[0027] The first step: ethyl cellulose, methacrylic anhydride, 4-dimethylaminopyridine in molar ratio [ethyl cellulose]: [methacrylic anhydride]: [4-dimethylaminopyridine] = 1: 1.2 : 0.3 was dissolved in tetrahydrofuran and reacted for 5 hours at 50°C to prepare ethyl cellulose acrylic acid macromer;

[0028] The second step: mix ethyl cellulose acrylic macromer, mercaptoethylamine, and azobisisobutyronitrile in molar ratio [ethyl cellulose acrylic macromer]: [mercaptoethylamine]: [azobis Isobutyronitrile]=1:1:0.03 was dissolved in ethanol, and after heating and reacting at 75°C for 5 hours, the product was precipitated in deionized water, filtered and dried to obtain aminocellulose with a yield of 90.4%.

[0029] The preparation process reaction formula of the present embodiment is as follows:

[0030] first step

[0031]

[0032] Wherein, R is the characteristic functional group of the cellulose ...

Embodiment 2

[0038] Embodiment 2: utilize ethyl cellulose to prepare amino cellulose

[0039] Step 1: Dissolve ethyl cellulose, methacryloyl chloride, and triethylamine in tetrahydrofuran in a molar ratio [ethyl cellulose]: [methacrylic anhydride]: [triethylamine] = 1:1:0.3 React at 10°C for 5 hours to prepare ethyl cellulose acrylic acid macromer;

[0040] The second step: the molar ratio of ethyl cellulose acrylic acid macromer, mercaptoethylamine, and photoinitiator 907 [ethyl cellulose acrylic acid macromer]: [mercaptoethylamine]: [photoinitiator 907] =1:0.5:0.04 dissolved in ethanol at 2mW / cm 2 After being irradiated by an ultraviolet lamp for 12 hours, the product was precipitated in deionized water, filtered and dried to obtain aminocellulose with a yield of 89.2%.

Embodiment 3

[0042] Aminocellulose was prepared from microcrystalline cellulose.

[0043] R in this embodiment is H, -CH 3 any of the.

[0044]Step 1: Dissolve microcrystalline cellulose, methacrylic anhydride and triethylamine in DMAc / Prepare microcrystalline cellulose acrylic acid macromer by reacting at 40°C for 5 hours in LiCl system;

[0045] The second step: microcrystalline cellulose acrylic macromer, mercaptoethylamine, and azobisisobutyronitrile in molar ratio [ethyl cellulose acrylic macromer]: [mercaptoethylamine]: [azobis [isobutyronitrile]=1:2:0.04 was dissolved in DMSO, and after heating at 60°C for 5 hours, the product was precipitated in deionized water, filtered and dried to obtain aminocellulose with a yield of 86.0%.

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Abstract

The invention discloses amino cellulose and a preparation method thereof. The preparation method comprises the following steps: reacting cellulose, a double-bond introducing agent and a catalyst in a good solvent system according to a certain molar ratio at 0-70 DEG C for 1-24 hours to prepare a cellulose-based acrylic acid macromonomer; and 2, dissolving the cellulose-based acrylic macromonomer, mercaptoethylamine and an initiator in a good solvent according to a certain ratio, reacting at 10-100 DEG C or under the irradiation of an ultraviolet lamp for 1-15 hours, precipitating the product in deionized water, filtering and drying to obtain the amino cellulose. The amino cellulose can be conveniently and efficiently prepared, and the obtained amino cellulose has better solubility and can be used as a Schiff base chemical macromolecular cross-linking agent and an epoxy resin curing agent.

Description

technical field [0001] The invention relates to cellulose and a preparation method thereof, in particular to an amino cellulose and a preparation method thereof. Background technique [0002] With the increasing consumption of fossil raw materials, the use of renewable resources to prepare functional chemicals, polymer materials, adsorption materials, etc. has received great attention. Cellulose is the most abundant renewable resource with the advantages of environmental friendliness, degradability, and low price. It has been widely used in various fields of industrial production and has the prospect of replacing corresponding petroleum-based products. [0003] As a nitrogen-containing cellulose derivative, aminocellulose is widely used in agriculture, food industry, textile industry, daily chemical industry and other fields, especially in the field of environmental protection. Coordination bonds are formed through extremely strong coordination, so as to effectively adsorb ...

Claims

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Application Information

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IPC IPC(8): C08B3/08C08B3/14C08B3/22
CPCC08B3/08C08B3/14C08B3/22
Inventor 卢传巍储富祥勇强王基夫王春鹏
Owner NANJING FORESTRY UNIV
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