Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of cationic nano-cellulose containing lignin

A nanocellulose and cationization technology, applied in the field of preparation of cationized nanocellulose, achieves the effects of easy large-scale production, lower reaction temperature and low equipment requirements

Active Publication Date: 2021-04-27
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
View PDF6 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of cationic nano-cellulose containing lignin
  • A kind of preparation method of cationic nano-cellulose containing lignin
  • A kind of preparation method of cationic nano-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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of lignin-containing cationic nano-cellulose, which belongs to the technical field of cellulose modification. The agricultural waste is pulverized and mixed with an alkali solution and a cationic etherification agent, reacted in a one-pot method using a combination of microwave and ultrasonic waves, and the cellulose is nano-sized, that is, a one-pot method is used to prepare cationic nanocellulose containing lignin. The preparation process of the invention is simple, the reaction temperature is lowered, the reaction time is saved, and the possibility of industrialization is high. At the same time, the obtained cationic nano-cellulose containing lignin has the advantages of good stability, high film-forming strength and good antibacterial property, and good effect can be obtained when it is used for the adsorption of heavy metal ions in water. Therefore, the cationic nanocellulose prepared by this method has great application value in the fields of antibacterial and adsorption.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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