Preparation method of cationic nanometer cellulose containing lignin

A nano-cellulose, cationization technology, applied in the field of preparation of cationized nano-cellulose, to achieve efficient and clean production, low equipment requirements, avoiding environmental pollution and occupying land

Active Publication Date: 2018-11-06
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on its use in the preparation of modified nanocellulose

Method used

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  • Preparation method of cationic nanometer cellulose containing lignin
  • Preparation method of cationic nanometer cellulose containing lignin
  • Preparation method of cationic nanometer cellulose containing lignin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of Cationic Nanocellulose Using Tobacco Stem as Raw Material

[0034] The tobacco rods were peeled and crushed, and the raw material analysis is shown in Table 1. Mix the tobacco rod powder, 2,3-epoxypropyltrimethylammonium chloride, and KOH into DMAC, wherein the amount of 2,3-epoxypropyltrimethylammonium chloride is 1% of the mass of the tobacco rod powder. times, the dosage of KOH is 0.5% of the mass of the tobacco rod powder, and the dosage of DMAC is 20 times of the mass of the tobacco rod powder. Put the reaction solution into the ultrasonic microwave chemical reactor, set the microwave at 2000MHz / 1000W, the ultrasonic frequency at 30KHz / 50W, react at 40°C for 5h, filter the obtained liquid, and recover the filtrate containing DMAC for recycling, and wash the filter residue with deionized water After washing 5 times, cationized nanocellulose can be obtained.

[0035] Verification 1

[0036] It can be seen that embodiment 1 has successfully obtained ...

Embodiment 2

[0038] Preparation of Cationic Nanocellulose from Corn Bracts

[0039] The maize husks were crushed, and the raw material analysis is shown in Table 3. Mix corn husk powder, tetradecyltrimethylammonium bromide, and KOH into DMF, wherein the amount of tetradecyltrimethylammonium bromide is 10 times the mass of corn bract powder, and the amount of KOH is 10 times that of corn bract powder. 3% of the mass of the bract powder, and the amount of DMF is 200 times of the mass of the corn bract powder. Put the reaction solution into the ultrasonic microwave chemical reactor, set the microwave at 2400MHz / 800W, the ultrasonic frequency at 40KHz / 50W, react at 40°C for 1h, filter the obtained liquid, recover the filtrate containing DMF and recycle it, and wash the filter residue with deionized water After washing 5 times, cationized nanocellulose can be obtained.

[0040] Verification 2

[0041] It can be seen that embodiment 2 has successfully obtained nanocellulose fibrils with a dia...

Embodiment 3

[0044] Preparation of Cationic Nanocellulose Using Asparagus Asparagus as Raw Material

[0045] The asparagus is pulverized, and the raw material analysis is shown in Table 5. Take asparagus powder, 3-chloro-2-hydroxypropyltrimethylammonium chloride and NaOH and mix them into DMSO, wherein the dosage of 3-chloro-2-hydroxypropyltrimethylammonium chloride is 5 times of the mass of the powder, the amount of NaOH is 1% of the mass of the Asparagus powder, and the consumption of DMSO is 100 times of the mass of the Asparagus powder. Put the reaction solution into the ultrasonic microwave chemical reactor, set the microwave at 2300MHz / 1000W, the ultrasonic frequency at 35KHz / 50W, react at 65°C for 4h, filter the obtained liquid, recover the filtrate containing DMSO and recycle it, and wash the filter residue with deionized water After washing 5 times, cationized nanocellulose with a diameter of about 40 nm can be obtained.

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Abstract

The invention relates to a preparation method of cationic nanometer cellulose containing lignin, and belongs to the technical field of cellulose modification. The preparation method comprises following steps: agricultural waste is crushed, and is mixed with an alkali solution and a cationic etherifying agent, microwave and supersonic wave combined one-kettle method is adopted for reaction, and cellulose nanometer modification is carried out, so that the cationic nanometer cellulose containing lignin is prepared through one-kettle method. The preparation method is simple; reaction temperature is reduced; reaction time is shortened; industrialized production is possible to be realized; at the same time, the obtained cationic nanometer cellulose containing lignin is high in stability, film forming strength, and antibacterial performance, excellent effect can be achieved with the cationic nanometer cellulose containing lignin is used for heavy metal absorption in water, and the applicationvalue of the cationic nanometer cellulose containing lignin in the fields of antibacterial and absorption is extremely high.

Description

technical field [0001] The invention relates to a preparation method of lignin-containing cationic nano-cellulose, which belongs to the technical field of cellulose modification. Background technique [0002] Nanocellulose is obtained by processing natural cellulose through nanotechnology, and has the advantages of nanoscale, high specific surface area and excellent stability. Therefore, nanocellulose has been widely used in packaging, biomedicine, photoelectric technology, water treatment and other fields (Nanoscale.2017,9(39):14758-14781; Nanoscale.2016,8(27):13131-13154; Environ Sci:Nano.2014,1(4):302-316). [0003] At present, the preparation methods of nanocellulose mainly include acid hydrolysis method, TEMPO catalytic oxidation method, mechanical method, etc. (Progress in Chemistry.2017,30(4):448-462). For the preparation of cationized nanocellulose, the cationic etherification agent is usually reacted with cellulose for more than 8 hours, the cellulose is quaterniz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/14C08B1/08
CPCC08B1/08C08B11/14
Inventor 李滨吴美燕刘超于光张跃冬冯晓燕咸漠
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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