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Double-schiff-base functionalized mesoporous silica antibacterial material and preparation method thereof

A technology of mesoporous silica and antibacterial materials, applied in botany equipment and methods, chemicals for biological control, animal repellants, etc., to achieve the effect of large specific surface area, broad application prospects, and controllability

Inactive Publication Date: 2011-07-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The antibacterial activity of this composite mesoporous material has not been reported

Method used

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  • Double-schiff-base functionalized mesoporous silica antibacterial material and preparation method thereof
  • Double-schiff-base functionalized mesoporous silica antibacterial material and preparation method thereof
  • Double-schiff-base functionalized mesoporous silica antibacterial material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of FPMBA: Under nitrogen protection, put 2,3,5,6-tetrafluoro-p-phenylenediamine and terephthalaldehyde into an ethanol solution with a small amount of acetic acid according to a molar ratio of 1:1, and stir at room temperature 24h, obtained by suction filtration, washing and drying. The ethanol solution with a small amount of acetic acid is 2-3 drops of acetic acid in 25ml of ethanol.

[0033] The structural formula of the obtained bis-Sieffer base organic molecule is:

[0034] .

Embodiment 2

[0036] Dissolve 2g of non-ionic surfactant P123 in 15g of water and 60g of hydrochloric acid solution with a concentration of 2mol / L, stir at 2000r / min for 30min at room temperature until clear, place it in a water bath at 40°C, add ethyl orthosilicate 3.83g of ester, after pre-hydrolysis for 2h, add 0.49g of chloropropyl-triethoxy silylating reagent (the molar ratio of it to ethyl orthosilicate is 1:9), stir at 40°C for 24h, then transfer to the Put it in a stainless steel autoclave lined with polytetrafluoroethylene, put it in an oven at 100°C, age for 24 hours, filter it, wash it with water, dry it naturally in the air, and finally extract it in ethanol hydrochloric acid solution for 24 hours to remove the surfactant. Dry at room temperature to obtain mesoporous silica (SBA-Cl-10%) containing 10% of chlorine groups in the total silicon. Take 1 g of SBA-Cl-10% solid powder and disperse it in 50 ml of anhydrous toluene, and stir it into a homogeneous solution under nitrogen p...

Embodiment 3

[0038]Dissolve 2g of non-ionic surfactant P123 in 15g of water and 60g of hydrochloric acid solution with a concentration of 2mol / L, stir at 2000r / min for 30min at room temperature until clear, place it in a water bath at 40°C, and add tetraethyl orthosilicate 3.61g, after pre-hydrolysis for 1h, add 0.74g of chloropropyl-triethoxysilylating reagent (the molar ratio of it to ethyl orthosilicate is 1:5.7), stir at 40°C for 24h, then transfer to poly In a stainless steel autoclave lined with tetrafluoroethylene, put it in an oven at 100°C, age for 24 hours, filter, wash with water, dry naturally in the air, and finally extract in ethanol hydrochloric acid solution for 24 hours to remove surfactant Drying under low temperature to obtain mesoporous silica (SBA-Cl-15%) containing 15% of chlorine groups in the total silicon. Take 1 g of the above solid powder and disperse it in 50 ml of anhydrous toluene, stir and reflux at 110° C. under nitrogen protection to form a homogeneous solu...

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Abstract

The invention discloses a double-schiff-base functionalized mesoporous silica antibacterial material and a preparation method thereof. The double-schiff-base functionalized mesoporous silica antibacterial material has the aperture of 2-7nm and the specific surface area of 230-395m<2> / g through the measurement of a nitrogen adsorption / desorption isothermal line. The preparation method comprises the following steps of: firstly preparing mesoporous silica containing an active chlorine-based group; and sufficiently dispersing the functionalized mesoporous silica in toluene, adding double-schiff-base organic molecules (FPMBA) obtained through the condensation of amine and aldehyde into the mixture under the backflow conditions, and obtaining the double-schiff base functionalized mesoporous silica antibacterial material through cooling, filtering, washing and drying. The double-schiff base functionalized mesoporous silica antibacterial material prepared by adopting the preparation method disclosed by the invention has the advantages of having a regular one-dimensional pore structure, larger specific surface area and larger aperture, and the in-pore self-assembly of the antibacterial material is realized. As silylated reagent and ethyl orthosilicate are utilized for synthesis through in-situ cocondensation in a sol / gel system, the quantity of chlorine bases on porous surfaces is controllable; and therefore the controllability of the solid capacity of organic schiff base is realized.

Description

technical field [0001] The invention relates to an antibacterial material containing dischever base, in particular to a bis Schiff base functionalized mesoporous silicon oxide antibacterial material and a preparation method thereof. Background technique [0002] With the rapid development of industrial technology and the increase of population, various environmental pollutants, harmful bacteria, and toxic pesticides seriously threaten human health and destroy the living environment of human beings. Many researchers have begun to actively take measures to effectively reduce these kind of hazard. The development of materials with antibacterial activity is widely used in biomedical products, packaging materials and as air purification filters to protect our ecological environment, so research on this type of new materials has attracted more and more attention. [0003] So far, the most commonly used method to obtain antibacterial active materials is to obtain antibacterial mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N35/10A01N25/08A01P1/00
Inventor 王英王建强储升孔飞骆磊磊邹志刚
Owner NANJING UNIV
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