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Silicon rubber/nano-silver-carrying modified montmorillonite nanometer antibacterial composite material and preparation method thereof

A composite material and montmorillonite technology, which is applied in the field of silicone rubber/nano-silver modified montmorillonite nano-antibacterial composite material and its preparation, can solve problems such as environmental pollution, improve antibacterial effect, shorten ion exchange time, The effect of improving compatibility

Inactive Publication Date: 2018-12-04
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common reducing agents include sodium borohydride, citric acid, ascorbic acid and hydrogen, etc. However, the reducing agents and stabilizers added in the preparation process limit the application of nano-silver particles in medical and other fields, and also cause environmental pollution

Method used

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  • Silicon rubber/nano-silver-carrying modified montmorillonite nanometer antibacterial composite material and preparation method thereof
  • Silicon rubber/nano-silver-carrying modified montmorillonite nanometer antibacterial composite material and preparation method thereof
  • Silicon rubber/nano-silver-carrying modified montmorillonite nanometer antibacterial composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of modified montmorillonite:

[0030] Prepare nano-montmorillonite and deionized water into a suspension with a mass fraction of 1.5%, add 80% of the weight of nano-montmorillonite lecithin, heat up to 70°C, stir thoroughly for 2 hours, vacuum pump to filter and separate, deionize Washing with water several times, drying in an oven at 60° C. for 24 hours, to obtain nano-montmorillonite treated with organic intercalation.

[0031] (2) Preparation of nano-silver modified montmorillonite antibacterial agent

[0032] Prepare 0.8M, 10ml silver salt aqueous solution, add 2g modified montmorillonite, and disperse evenly; add reducing agent ascorbic acid 1.36g and stabilizer polyvinylpyrrolidone 1.36g, stir at 35°C for 3 hours, vacuum pump filtration and separation, deionized water After washing several times, oven-dried at 60°C for 24 h. That is, the nano-silver modified montmorillonite antibacterial agent is obtained.

[0033] (3) Preparation of silicone ru...

Embodiment 2

[0036] Step (1) and step (2) are identical with embodiment 1.

[0037] (3) Preparation of silicone rubber / silver-loaded nano-silver modified montmorillonite nano-antibacterial composite material

[0038]100 parts of silicone rubber are dispersed in cyclohexane, and 0.5 parts of nano-silver modified montmorillonite antibacterial agent is dispersed in the silicone rubber solution, mixed and stirred for 5 minutes, after stirring evenly, 7.2 parts of crosslinking agent ethyl silicate are added, Stir for 20 minutes, add 0.1 part of dibutyltin dilaurate as an accelerator, mix and stir for 20 minutes, apply it on the mold, and leave it for 7 days to prepare the silicone rubber / nano silver-loaded modified montmorillonite nano antibacterial composite material.

Embodiment 3

[0040] Step (1) and step (2) are identical with embodiment 1.

[0041] (3) Preparation of silicone rubber / silver-loaded nano-silver modified montmorillonite nano-antibacterial composite material

[0042] 100 parts of silicone rubber are dispersed in cyclohexane, 1 part of silver-loaded nano-silver modified montmorillonite antibacterial agent is dispersed in the silicone rubber solution, mixed and stirred for 5 minutes, after stirring evenly, 7.2 parts of crosslinking agent ethyl silicate are added, Stir for 20 minutes, add 0.1 part of dibutyltin dilaurate as an accelerator, mix and stir for 20 minutes, apply it on the mold, and leave it for 7 days to prepare the silicone rubber / nano silver-loaded modified montmorillonite nano antibacterial composite material.

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Abstract

The invention provides a silicone rubber / nano-silver-carrying modified montmorillonite nanometer antibacterial composite material. The silicone rubber / nano-silver-carrying modified montmorillonite nanometer antibacterial composite material is prepared from the following components in parts by weight: 100 parts of silicone rubber, 0.1 to 1 part of a nano-silver-carrying modified montmorillonite nanometer antibacterial agent, 150 to 200 parts of a dispersion medium, 7 to 8 parts of a cross-linking agent and 0.1 to 0.2 part of a promoter. The invention also provides a preparation method for the composite material provided by the invention. According to the invention, through organic intercalation treatment to nanometer montmorillonite, compatibility between montmorillonite and a polymer can be improved; meanwhile, montmorillonite lamellas are partially stripped; silver ions can more easily enter the interlamellar spacing of the montmorillonite; the time of ion exchange between the silverions and the montmorillonite is shortened; the silver carrying amount of the montmorillonite is increased; and the antibacterial effect of an antibacterial agent is improved.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a silicone rubber / nanometer silver-loaded modified montmorillonite nanometer antibacterial composite material and a preparation method thereof. Background technique [0002] Nosocomial infection is an outstanding clinical problem that urgently needs to be solved. At present, most artificial biomaterials such as polyurethane, silicone rubber, and natural latex used in clinical practice do not have antibacterial properties, and microorganisms are easy to attach and grow on their surfaces, becoming the main source of nosocomial infections. Studies have shown that biomaterials, whether long-term indwelling or short-term contact with the human body, are prone to cause various bacterial infections. According to data from the US Centers for Disease Control and Prevention (CDC), infections caused by built-in medical devices rank fifth among the causes of death among hospit...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K9/12C08K3/08C08K3/34C08K9/04C08K13/06
CPCC08K3/08C08K3/346C08K9/04C08K9/12C08K13/06C08K2003/0806C08L83/04
Inventor 孟娜周宁琳葛曼青
Owner NANJING NORMAL UNIVERSITY
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