A porous material with surface-modified nanostructure array and its application

A technology of nanostructures and porous materials, applied in the fields of application, chemicals for biological control, fungicides, etc., can solve the problems of long contact time and inconspicuous antibacterial effect, achieve short contact time and improve antibacterial effect , The effect of improving the inactivation efficiency

Active Publication Date: 2022-02-01
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to overcome the deficiencies of the prior art, to propose a porous material with a surface-modified nanostructure array, to achieve physical fragmentation of microorganisms by changing the interaction between the nanostructures and microorganisms, so as to solve the existing mechanical inhibition. The antibacterial effect of the antibacterial method is not obvious, and the contact time is long, etc.

Method used

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  • A porous material with surface-modified nanostructure array and its application
  • A porous material with surface-modified nanostructure array and its application
  • A porous material with surface-modified nanostructure array and its application

Examples

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Effect test

Embodiment 1

[0029] Prepare the surface-modified copper hydroxide nanowire array and place it in a closed pipeline, such as figure 1 shown. will contain 10 6 ~10 7 The water sample of CFU / mL Escherichia coli (CGMCC 1.3373) was introduced into the pipeline through the water pump. Treatment is complete when the water sample flows out through the nanowire array. The concentration of viable bacteria in the water samples to be treated and the treated water samples was determined by plate counting method, and the bacterial inactivation efficiency was evaluated by logarithmic inactivation rate, and the calculation method was -log 10 (N / N 0 ), where N 0 N is the bacterial concentration in the influent, and N is the bacterial concentration in the effluent. The inactivation rate of Escherichia coli by surface-modified copper hydroxide nanowires is as follows: figure 2 As shown in the histogram Modified NWs, the effluent bacteria are completely inactivated, and the inactivation rate can reach...

Embodiment 2

[0033] Surface-modified copper hydroxide nanowire arrays were used to treat four typical bacteria in water bodies, and the treated water samples were stored at 25°C under simulated light conditions, at the time points of 0, 1, 5, 10, and 24 hours of storage Samples were taken to determine the concentration of viable bacteria in the treated water samples by the plate count method. Storage curves such as Figures 3a-3d As shown, after the hydraulic antibacterial treatment of the present invention, Gram-negative Escherichia coli (E.coli, CGMCC 1.3373), Pseudomonas aeruginosa (P.Aeruginosa, CGMCC 1.12483), and Gram The positive Enterococcus faecalis (E.faecalis, CGMCC 1.2135) and Staphylococcus aureus (S.aureus, CGMCC 1.12409) can all be inactivated during storage, and the inactivation rate is above 6log, and there is no resurrection phenomenon.

Embodiment 3

[0035] ZnO nanorod arrays grown in situ on copper foam were prepared, and the same surface modification method was used to treat the ZnO nanorod arrays. Escherichia coli were treated with surface-modified and pristine unmodified ZnO nanorod arrays. Other operation steps are identical with embodiment 1. For the treated effluent, samples were taken at the storage time points of 0, 1, 5, and 10 h to determine the concentration of viable bacteria in the treated water samples by plate counting. The result is as Figure 4 As shown, the surface-modified zinc oxide nanorod array (Modified-ZnO nanorods) can achieve a 4log inactivation rate after treating Escherichia coli, while the original zinc oxide nanorod array has no significant antibacterial effect.

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Abstract

The invention discloses a porous material with a surface-modified nanostructure array and its application. The porous material includes: a porous material substrate, and a nanostructure array constructed in situ on the porous material substrate; wherein, in the nano The nanostructure surface of the structure array is provided with a surface modification layer, and the surface modification layer is used to increase the adhesion force of the nanostructure to microorganisms. The porous material is used for disinfection, including: placing the porous material with a surface-modified nanostructure array in a flowing fluid, so that the fluid shuttles through the gaps of the nanostructure array in a filter-like flow state, and during the shuttle flow During the process, the microorganisms are in contact with the nanostructures, and the flow field force generated by the fluid and the adhesion force of the nanostructures to the microorganisms tear the microorganisms and cause the microorganisms to be physically broken to achieve disinfection.

Description

technical field [0001] The invention relates to the field of microbial risk control, in particular to a porous material with a surface-modified nanostructure array and its application in disinfection. Background technique [0002] Traditional disinfection technologies (such as chlorine, ozone, ultraviolet disinfection and high temperature and high pressure sterilization, etc.) face problems such as the generation of toxic and harmful by-products, high energy consumption, and bacterial resurrection. In order to control environmental risks and ensure healthy water use, it is urgent to develop new types of safe and efficient Disinfection technology. The mechanical antibacterial effect of nanomaterials is considered to be an ideal way to control microbial risks. When nanostructures come into contact with bacteria, they can deform or puncture the cell membrane until the bacteria lose their complete cell membrane structure and die. However, the small-scale and high-curvature cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/24A01N59/20A01N59/16A01P1/00A01P3/00
CPCA01N25/24A01N59/20A01N59/16C02F2305/08C02F2303/04C02F1/001B01D2325/48B01D2325/06B01D69/12B01D71/74B01D67/0088B01D71/02B08B17/065B01D69/14111C02F1/442C02F2201/005
Inventor 吴乾元彭露朱浩杰杨诚胡洪营
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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