Method for preparing polyurethane-nanometer silver long-acting antibacterial film by modification after heat treatment

A polyurethane and nano-silver technology, applied in the field of antibacterial materials, can solve the problems of deterioration, unsuitable surface modification, and difficult polymer synthesis, and achieve the effects of simplifying the reaction process, good long-term antibacterial properties, and avoiding difficult synthesis.
CN107163280BActive Publication Date: 2019-12-27QILU UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QILU UNIV OF TECH
Publication Date
2019-12-27

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Abstract

The invention relates to a method for preparing a polyurethane-nanosilver long-acting antibacterial film by a post-heat treatment modification method, which includes the following steps: (1) diisocyanate and polytetrahydrofuran are mixed to react; a cross-linking agent and an acetone solution of a chain extender are added, dimethylolpropionic acid and a catalyst are added, reaction takes place, and thereby PU (polyurethane) is obtained; a dimethylformamide solution of silver nitrate is added into a polyurethane solution, a film is formed after uniform stirring, heat treatment is carried out, and thereby a polyurethane-nanosilver film is obtained; (2) 4,4'-dihydroxybenzophenone reacts with long-chain alkyl halide, so that 4,4'-bis-long-chain alkoxy benzophenone is obtained; the 4,4'-bis-long-chain alkoxy benzophenone reacts with hydrazine hydrate, so that 4,4'-bis-long-chain alkoxy benzophenone hydrazone is obtained; and the 4,4'-bis-long-chain alkoxy benzophenone hydrazone undergoes oxidation reaction, so that long-chain alkyl diazomethane is obtained; (3) the long-chain alkyl diazomethane is dissolved into a solvent, and is uniformly applied onto the surface of the polyurethane-nanosilver film, and after heat treatment, the polyurethane-nanosilver long-acting antibacterial film is obtained. The method can be used for realizing long-acting bacteria resistance.
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Description

technical field

[0001] The invention relates to a method for preparing a polyurethane-nanometer silver long-acting antibacterial film by a modification method after heat treatment, and belongs to the technical field of antibacterial materials. Background technique

[0002] Polyurethane is an important class of medical polymer materials with excellent blood compatibility, good biological stability and mechanical properties. Fu Qiang et al. (Tan Hong, Li Jiehua, Fu Qiang. Design, preparation and performance of biomedical phospholipidated polyurethane. Chinese Science: Chemistry, 42(5), pp 661-675, 2012.) showed that polyurethane has the same properties as natural blood vessels The best matching compliance, especially for blood contact devices, has an irreplaceable role in surgical treatment. However, interventional medical polymer materials need to have long-term antibacterial properties, otherwise it is easy to cause postoperative infection in clinical application, leading t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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