A kind of cellulose derivative and its preparation method and application

A cellulose derivative and cellulose technology, applied in botanical equipment and methods, chemicals for biological control, chemical instruments and methods, etc., can solve the problem of weak soil-locking ability of roots, difficulty in controlling soil erosion, aggravation, etc. Problems, to achieve the effect of improving water retention, realizing high value-added utilization, and improving compressive strength

Active Publication Date: 2020-11-10
BEIJING INSTITUTE OF TECHNOLOGYGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the low soil fertility, most plants grow insufficiently, and the root system has weak soil-holding ability, which makes it difficult to control soil erosion, and soil compaction caused by excessive fertilization also exacerbates this phenomenon (Ning T, Guo Z S, Guo M C, et al .Soil water resources uselimit in the loess plateau of China[J].Agricultural Sciences,2013,4:100-105.)

Method used

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  • A kind of cellulose derivative and its preparation method and application
  • A kind of cellulose derivative and its preparation method and application
  • A kind of cellulose derivative and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Coniferous wood cellulose material used in the test: α-cellulose content 93.5%, degree of polymerization 1020, fineness 80 mesh, provided by Beijing North Century Cellulose Technology Development Co., Ltd.

[0042] Etherification process: 80g of coniferous wood cellulose is added into a glass reactor containing 800g of isopropanol aqueous solution with a mass concentration of 90%, and the stirred material is evenly dispersed; then adding a concentration of 26% NaOH solution into the reactor, Alkaline at 20°C for 1.5h; add 50g of 50% isopropanol solution of chloroacetic acid, heat up to 50°C, etherify for 1h, then heat up to 75°C, etherify for 30min; cool to 40°C, add glacial acetic acid / Neutralize the isopropanol solution to a pH value of 7, filter, wash, centrifuge, dry, and pulverize to obtain carboxymethyl cellulose with a certain degree of substitution, which is ready for use.

[0043] Nitrification process: add fuming nitric acid and dichloromethane into the three...

Embodiment 2

[0047] Refined cotton powder for the test: α-cellulose content 97.5%, degree of polymerization 1150, fineness 80 mesh, provided by Beijing North Century Cellulose Technology Development Co., Ltd.

[0048] Etherification process: Add 80g of refined cotton powder into a glass reactor containing 800g of isopropanol aqueous solution with a mass concentration of 85%, and stir the material to disperse evenly; then add a 27% NaOH solution to the reactor, Alkaline at ℃ for 1.5h; add 55g of 50% isopropanol solution of chloroacetic acid, raise the temperature to 50°C, etherify for 1h, then raise the temperature to 75°C, etherify for 30min; cool to 40°C, add glacial acetic acid / isopropanol Neutralize with propanol solution, filter, wash, centrifuge, dry, and pulverize to obtain carboxymethyl cellulose with a certain degree of substitution, which is ready for use.

[0049] Nitrification process: add fuming nitric acid and dichloromethane into a three-necked flask in a ratio of 40:60, stir...

Embodiment 3

[0053] Bamboo pulp cellulose material used in the test: a-cellulose content 89.5%, degree of polymerization 820, fineness 80 mesh, provided by Beijing North Century Cellulose Technology Development Co., Ltd.

[0054] Etherification process: Add 80g of bamboo pulp cellulose into a glass reactor filled with 800g of isopropanol aqueous solution with a mass concentration of 90%, and stir the material to disperse evenly; then add cellulose with a concentration of 20% to 51% into the reactor. NaOH solution, basify at 20°C for 1.5h; add 50g of isopropanol solution containing 50% chloroacetic acid, heat up to 50°C, etherify for 1h, then heat up to 75°C, etherify for 30min; cool, add glacial acetic acid / Neutralize with isopropanol solution, filter, wash, centrifuge, dry, and pulverize to obtain carboxymethyl cellulose with a certain degree of substitution, which is ready for use.

[0055] Nitrification process: add fuming nitric acid and dichloromethane into a three-necked flask in a ...

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Abstract

The invention discloses a cellulose derivative. A preparation method for the cellulose derivative comprises the following steps: subjecting cellulose to alkalization and etherification to obtain a carboxymethyl cellulose intermediate; subjecting the carboxymethyl cellulose intermediate to nitration in a nitrification system, and then carrying out washing, drying, stoving and crushing successivelyto obtain carboxymethyl cellulose carboxylate; and subjecting the carboxymethyl cellulose carboxylate to amination in an ammonium system, and then carrying out neutralization, precipitation and dryingsuccessively to obtain the target cellulose derivative. The cellulose derivative of the invention contains three groups, i.e., a nitrate group, a carboxymethyl group and an ammonium ion, has slow release and water retention performance, can increase soil strength, is applicable to arid regions, and provides favorable conditions for plant growth.

Description

technical field [0001] The invention relates to the application field of cellulose, in particular to a cellulose derivative and its preparation method and application. Background technique [0002] Nitrocellulose (NC) is a cellulose ester derivative that is used both in military and civilian applications. Due to its single chemical structure, strong rigidity, limited nitrogen content, low-temperature brittle products, high-temperature softness and other characteristics, its application field is limited, especially when the NC nitrogen content is lower than 10.2%, it has almost no practical value (Shao Ziqiang, Wang Wenjun .Structure and properties of nitrocellulose [M]. Beijing: National Defense Industry Press, 2011.). –ONO on NC 2 It is a lipophilic group, so it is only soluble in some polar solutions. If molecular design is carried out, multi-group chemical modification is carried out, and hydrophilic groups are introduced into the NC molecular chain, which can increase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B13/00C09K17/32A01N43/16A01P21/00C09K101/00
CPCA01N43/16C08B13/00C09K17/32C09K2101/00
Inventor 邵自强刘燕华李艳菊陈静李友琦王行惠袁晶晶王梓诺吴月王飞俊陈鹏万
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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