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Carbon nanotube polyamino acid water-soluble derivatives and its preparation method and application

A carbon nanotube, polyamino acid technology, applied in the fields of botanical equipment and methods, chemicals for biological control, applications, etc., can solve the problems of long reaction period, low yield, and complicated purification process.

Active Publication Date: 2021-04-09
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods all exist to varying degrees, such as: long reaction cycle, complex purification process, low yield and other problems
Among them, some scholars have reported that the N-methylpyrrolidone (NMP) solution of SWCNT and MWCNT respectively reacted with 2-azidoethanol to realize the preparation of surface nitrogen-functionalized carbon nanotubes, but this kind of surface functionalization CNT is still not water soluble

Method used

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  • Carbon nanotube polyamino acid water-soluble derivatives and its preparation method and application
  • Carbon nanotube polyamino acid water-soluble derivatives and its preparation method and application
  • Carbon nanotube polyamino acid water-soluble derivatives and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Mix 0.5g SWCNT (specification: tube diameter d3 CH 2 CH 2 COOH was sequentially fed into a three-necked reaction flask, 100ml NMP was used as a solvent, protected by nitrogen, and mechanically stirred; slowly heated to 125°C, kept for 72 hours, stopped heating, and cooled to room temperature; added ethyl acetate to wash, redissolved in deionized water, and filtered Extraction, concentration, dialysis, freeze-drying to obtain water-soluble CNT 1 as a solid product.

[0046] The characterization information of water-soluble CNT 1 is as follows:

[0047] figure 1 As shown in the infrared spectrum at 3400cm -1 The strong absorption peak at is attributed to the O-H stretching vibration, 1717cm -1 The absorption peak at is attributed to C=O stretching vibration, 1025cm -1 Attributed to the C-OH stretching vibration, these three groups of absorption peaks prove the existence of -COOH in the water-soluble CNT 1 molecule, at 2928cm -1 The absorption peak at is attributed t...

Embodiment 2

[0049] Mix 0.5g MWCNT (specification: tube diameter3 CH 2 CH 2 COOH is sequentially fed into the three-necked reaction flask, and the rest of the conditions are the same as in Example 1 of the present invention. The solid product water-soluble CNT 2 is obtained. The results of TGA analysis showed that the number of side chains linked to every 1000 carbon atoms in the water-soluble CNT 2 was 50.

Embodiment 3

[0051] Mix 0.5g MWCNT (specification: tube diameter 30-50nm, tube length 0.5-2μm) with 100 times the mass of liquid N 3 CH 2 CH 2 COOH is sequentially fed into the three-necked reaction flask, and the rest of the conditions are the same as in Example 1 of the present invention. The solid product water-soluble CNT3 is obtained. The results of TGA analysis showed that the number of side chains linked to every 1000 carbon atoms in water-soluble CNT 3 was 30.

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Abstract

The invention discloses a water-soluble derivative of carbon nanotube polyamino acid and its preparation method and application. The carbon nanotube polyamino acid water-soluble derivative is composed of carbon nanotube (CNT) and azide compound N 3 (CH 2 ) m SO 3 L or N 3 (CH 2 ) m‑1 COOH is prepared by nitrobin reaction, and its general structural formula is: CNT[N(CH 2 ) m SO 3 L] x or CNT[N(CH 2 ) m‑1 COOL] x Wherein, CNT is multi-walled carbon nanotube (MWCNT) or single-walled carbon nanotube (SWCNT); m=2‑6; L is H, NH 4 , Na or K; x is defined as the side chain N(CH 2 ) m SO 3 L or N (CH 2 ) m‑1 The number of COOL, when the CNT is MWCNT, x≥10; when the CNT is SWCNT, x≥50. The invention provides a method for large-scale preparation of water-soluble derivatives of carbon nanotube polyamino acid with nitrogen-bene functionalization on the surface, that is, a nitrogen-bene multi-addition reaction method. The present invention also provides the application of the carbon nanotube polyamino acid water-soluble derivatives functionalized on the surface in the preparation of plant growth promoters. The derivatives themselves have a good free radical scavenging effect and are used for seed treatment to promote The growth effect is obvious.

Description

technical field [0001] The invention belongs to the field of carbon nanometer materials, and relates to a kind of carbon nanotube polyamino acid water-soluble derivatives whose surface is functionalized with nitrates, and a preparation method and application thereof. Background technique [0002] Carbon nanotubes (CNTs), as an allotrope of carbon, are following the discovery of C 60 After that, another new carbon structure was discovered by Japanese scientists in 1991. CNTs can be viewed as graphene sheets curled into a tubular structure in which carbon atoms form sp 2 Hybridized highly delocalized large π bonds. The single-layer structure rolled by graphene is called single-walled carbon nanotube (SWCNT), with a typical diameter of 0.6-2nm, while the multi-layer structure of multi-walled carbon nanotube (MWCNT) can reach hundreds of nanometers in diameter. Due to the unique physical and chemical properties of CNT, it has great application potential in the fields of physi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/08C08K3/04A01N41/08A01N37/46A01P21/00
CPCA01N37/46A01N41/08C08G69/08C08K3/041
Inventor 何睿雷彩燕刘艳杰臧振锋邰付菊毋青男王合中李玥
Owner HENAN AGRICULTURAL UNIVERSITY