A kind of method using imidazole ionic liquid as cross-linking agent to prepare charge gradient and hydrophobicity gradient cationic polymer antibacterial film

A cationic, cross-linking agent technology, which is used in the field of cross-linking agents and adding quaternary ammonium salts with unsaturated double bonds and long alkyl linear chains at the same time, can solve the limitations of wide application, thermal stability and Poor processability and other problems, to achieve the effect of uniform polymer structure, fast reaction and high yield

Active Publication Date: 2018-06-05
NAT UNIV OF DEFENSE TECH
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  • Application Information

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Problems solved by technology

Chinese patent CN101628952 has reported a kind of guanidine polymer antibacterial agent, these polymer antibacterial agents have limited their wide application due to poor thermal stability and processability
Most of these patent documents increase the antibacterial group in the antibacterial polymer, so that the positive charge density and the hydrophobic group content increase at the same time, so as to achieve the effect of improving the antibacterial efficiency. While observing the antibacterial effect, observe the influence of these two factors on the antibacterial effect of polymer antibacterial agents

Method used

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  • A kind of method using imidazole ionic liquid as cross-linking agent to prepare charge gradient and hydrophobicity gradient cationic polymer antibacterial film
  • A kind of method using imidazole ionic liquid as cross-linking agent to prepare charge gradient and hydrophobicity gradient cationic polymer antibacterial film
  • A kind of method using imidazole ionic liquid as cross-linking agent to prepare charge gradient and hydrophobicity gradient cationic polymer antibacterial film

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Embodiment 1

[0028] (1) Synthesis of positively charged diallyl imidazolium salt (DIm), its chemical reaction process is as follows figure 1 shown. N-allylimidazole (7mL, 64mmol), 3-bromopropene (6.6mL, 76mmol) and 15ml of absolute ethanol were sequentially added into a 100ml round bottom flask, and refluxed at 50°C for 24h. After the reaction, the unreacted 3-bromopropene and solvent ethanol were distilled off under reduced pressure, then washed three times with n-hexane, and the yellow-green liquid in the lower layer was separated and dried in vacuum at 60°C for 24 hours to obtain N,N-diene Propyl imidazolium bromide.

[0029] (2) Preparation of antibacterial film with charge gradient. Take TAC:DIm=1:1 synthesis as an example. Its chemical reaction process is as figure 2 As shown, first antibacterial monomer 1-allyl-3-decyl imidazolium bromide (ADIm, 0.135g), 1,1,2,2-tetraallyloxyethane (TAC, 0.163g), Add N,N-diallylimidazolium bromide (0.169g) and tetrakis(3-mercaptopropionic acid...

Embodiment 6

[0033] Example 6 Preparation of an antibacterial film with a hydrophobic gradient.

[0034] Taking the preparation of an antibacterial film with an antibacterial monomer content of 25% as an example, the chemical reaction process is as follows: figure 2shown. First, the antibacterial monomer 1-allyl-3-decyl imidazolium bromide (ADIm, 0.337g), 1,1,2,2-tetraallyloxyethane (TAC, 0.075g), N,N - Diallylimidazolium bromide (0.234g) and tetrakis (3-mercaptopropionic acid) pentaerythritol ester (PETMP, 0.5g) were added to a 10mL small glass bottle with a stirring bar, and then 50μL of anhydrous DMF was used to induce The agent 2,2-dimethoxy-2-phenylacetophenone (DMPA, 48 mg) was dissolved and added to the above glass bottle. After the above substances were stirred for 30 seconds, absorb 100 μL of the mixed solution and apply it evenly on a circular glass slide through a four-sided wet film applicator. After irradiating with an ultraviolet lamp for 1 minute, an antibacterial film ca...

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Abstract

The invention relates to a method of preparing a cationic polymer antibacterial film with charge gradient and hydrophobicity gradient with imidazole ionic liquid as a crosslinking agent. Diallyl imidazole onium salt with positive charges is introduced to prepare the composite crosslinking agent to individually change the charge density and hydrophobicity of the antibacterial polymer film so as to prepare the novel polymer antibacterial film; individual regulation and control over the charge gradient and hydrophobicity gradient of the polymer film are achieved; the synthetic materials of diallyl imidazole are easy to obtain and low in price, and the method is simple in synthesis step and high in yield. A thiol-ene photopolymerization system reacts fast and is insensitive to oxygen, and a formed polymer is uniform in structure, high in heat insulation property, large in refractive index, high in oxidization inertness and water resistance.

Description

technical field [0001] The invention relates to a method for preparing charge gradient and hydrophobicity gradient cationic polymer antibacterial films using imidazole ionic liquid as a crosslinking agent, in particular to a method for introducing a positively charged diallyl imidazolium salt as a crosslinking agent And adding quaternary ammonium salt antibacterial monomers with unsaturated double bonds and long alkyl linear chains at the same time, so as to quantitatively control the charge density and hydrophobicity of the polymer antibacterial film. Background technique [0002] With the rapid development of society and the improvement of people's living standards, more and more people have found that harmful microorganisms such as bacteria and molds seriously endanger people's own health, quality of life and living environment. Considering that the demand for various antibacterial materials is gradually increasing, people are committed to inventing new, safer, more effic...

Claims

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Application Information

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IPC IPC(8): C08G75/045C08J5/18C08L81/02
CPCC08G75/045C08J5/18C08J2381/02
Inventor 李义和尹丽华冉斌蒋振华王清华胡天娇李公义楚增勇
Owner NAT UNIV OF DEFENSE TECH
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