Application of high-dispersity hybridization antibacterial agent in aspect of ultrafiltration membrane improvement

A high-dispersibility, antibacterial agent technology, applied in the field of nanomaterial technology application, can solve the problems of high requirements, complicated process, cumbersome separation membrane process, etc., and achieve the effect of good dispersion, excellent performance and good compatibility

Active Publication Date: 2016-07-06
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nano-silver composite materials can be used for functional adsorbents, functional film modification, etc., but most of the preparation of nano-additives requires additional reducing agents and stabilizers to control the growth of silver nanoparticles, and few can be used for specific applications. adapted modification
[0004] Chinese patent (authorized announcement number: CN102125056B) discloses a preparation method of a silver/graphene antibacterial composite material, using reduced graphene oxide-polystyrene sodium sulfate as the nanoparticle carrier and reducing agent, and polystyrene sodium sulfate as the Water-soluble dispersant...

Method used

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  • Application of high-dispersity hybridization antibacterial agent in aspect of ultrafiltration membrane improvement
  • Application of high-dispersity hybridization antibacterial agent in aspect of ultrafiltration membrane improvement
  • Application of high-dispersity hybridization antibacterial agent in aspect of ultrafiltration membrane improvement

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Take 50mL, 1mg / mL graphene oxide / water dispersion and sonicate for 0.5h, then add 50mL, 2×10 -3 mol / L AgNO 3 Solution, after ultrasonication for 0.5h, add water to dilute to 250mL, then add 5mL, 0.1mol / L KOH solution to the above mixture, react in an oil bath at 90°C for 2h under magnetic stirring, the color of the solution changes from brown to yellowish brown, then keep warm at 60°C a period of time. The obtained solution was centrifuged, washed and dried to obtain the nanocomposite antibacterial agent GO-Ag. figure 1 It is the XRD pattern of GO and GO-Ag obtained in Example 1. The prepared graphene oxide and GO-Ag are composed of X-ray diffraction analysis characteristic diffraction peak crystal images, and the scanning range is 2θ=0~70°. The XRD of GO is in The (001) crystal plane characteristic peak appears around 2θ=10°, and the (111)(200)(220) crystal plane characteristic peak of nano-silver appears at 2θ=37°, 45°, and 57° in XRD of GO. Prove the successful pr...

Embodiment 2

[0032] Implementation steps are the same as in Example 1, AgNO 3 The volume of the solution is 100mL, 2×10 -3 mol / L, ultrasonic time 1.5h, the volume of KOH solution is 7mL, 0.1mol / L. figure 2 The GO-Ag2 curve in the middle is the infrared spectrogram of the material obtained in Example 2.

Embodiment 3

[0034] Implementation steps are the same as in Example 1, AgNO 3The volume of the solution is 100mL, 2×10 -3 mol / L, the amount of KOH solution is 7mL, 0.1mol / L, 100°C oil bath reaction for 1.5h. figure 2 The GO-Ag3 curve in the middle is the infrared spectrogram of the material obtained in Example 3.

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Abstract

The invention discloses application of a high-dispersity hybridization antibacterial agent in aspect of ultrafiltration membrane improvement. The high-dispersity hybridization antibacterial agent is a nanometer hybridization material formed by anchoring silver nanoparticles to a graphene slice layer. The application of the high-dispersity hybridization antibacterial agent for ultrafiltration membrane improvement comprises the steps that firstly, the high-dispersity hybridization antibacterial agent is added into N,N dimethylacetamide or N,N dimethylformamide or dimethyl sulfoxide, ultrasonography is performed to obtain a uniform dispersion agent, polyvinylidene fluoride or polyether sulfone is added into the dispersion agent, stirring is performed at the temperature of 55-65 DEG C to obtain a uniform casting membrane solution, standing is performed for defoaming for 6-12 h, pure water is adopted as a coagulation bath, and an immerged phase-inversion method is adopted for preparing a modified ultrafiltration membrane. The high-dispersity hybridization antibacterial agent has the good dispersity in water and a solvent, the good compatibility of the high-dispersity hybridization antibacterial agent and a membrane matrix is achieved, the high-dispersity hybridization antibacterial agent can be applied to modifying the ultrafiltration membrane, the application method is simple, and the obtained modified ultrafiltration membrane is good in performance.

Description

technical field [0001] The invention belongs to the application field of nanometer material technology, and in particular relates to the application of a highly dispersed hybrid antibacterial agent in the modification of ultrafiltration membranes. Background technique [0002] The development of nanotechnology has opened a new starting point for the application of nano silver antibacterial materials. As an emerging functional material, nano silver has unique physical and chemical properties. The preparation of nano-silver composite materials with stable structure requires some carriers with unique properties. Graphene oxide has a large specific surface area and high chemical stability, and can produce synergistic effects with nano-silver to improve the overall antibacterial effect of composite materials, which is ideal. Nanosilver loading matrix. In addition, graphene has good biocompatibility, and as a bacteriostatic agent, it will not produce toxic side effects on organi...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D61/14
CPCB01D61/145B01D67/0093
Inventor 陈桂娥吴琼许振良孙威广狄照文桂明哲徐孙杰朱维纬郑晓鹏叶静俞俊姜飞沈倩
Owner SHANGHAI INST OF TECH
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