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Strawberry-shaped silver-loaded polysilsesquioxane nano hybrid antibacterial material and preparation method thereof

A polysilsesquioxane and antibacterial material technology, applied in the field of polymer nanocomposite preparation, can solve problems such as affecting the antibacterial properties of coatings, reduce bacterial adhesion behavior, improve thermal stability and mechanical strength, The effect of improving the bactericidal performance

Inactive Publication Date: 2020-06-19
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides a strawberry-like silver-loaded silver polysilsesquioxane nano-hybrid coating in order to solve the shortcomings of the single inorganic material carrier or polymer carrier in the prior art, thereby affecting the antibacterial performance of the coating. Antibacterial material and preparation method

Method used

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  • Strawberry-shaped silver-loaded polysilsesquioxane nano hybrid antibacterial material and preparation method thereof
  • Strawberry-shaped silver-loaded polysilsesquioxane nano hybrid antibacterial material and preparation method thereof
  • Strawberry-shaped silver-loaded polysilsesquioxane nano hybrid antibacterial material and preparation method thereof

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preparation example Construction

[0028] The present invention provides a kind of preparation method of strawberry shape loaded silver polysilsesquioxane nano-hybrid antibacterial material, comprises the steps:

[0029] Step 1: Add aminosilane into a three-necked flask equipped with a condensing device, raise the temperature of the system to 60-125°C, control the stirring speed at 100-300rpm, and start adding aliphatic dibasic acid anhydride, aliphatic dibasic acid anhydride and aminosilane in batches The ratio of the amount of the substance is 1:1-1.05. After the addition of the aliphatic dibasic acid anhydride, the heat preservation reaction is carried out for 2-3 hours to obtain a transparent liquid, which is the reactive monomer carboxysilane (CTES);

[0030] Aminosilane is selected from one of 3-aminopropyltriethoxysilane (KH-550) and 3-aminopropyltrimethoxysilane (KH-540);

[0031] The aliphatic dibasic acid anhydride is selected from one of succinic anhydride and glutaric anhydride.

[0032] Step 2: Ad...

Embodiment 1

[0039] A preparation method of a strawberry-like silver-loaded polysilsesquioxane nano-hybrid antibacterial material, comprising the steps of:

[0040] (1) Accurately weigh 30.5g of KH-550 and add it to a three-neck flask equipped with a condensing device. The system is heated to 120°C, the stirring speed is controlled at 150rpm, and 13.8g of succinic anhydride (commonly known as succinic anhydride) is added in batches. Afterwards, keep warm for 3 hours to obtain a transparent liquid, i.e. reactive monomeric carboxysilane (CTES-1);

[0041] (2) Accurately weigh 0.2g AEO3 and 0.2g AEO9, 0.18g sodium hydroxide catalyst and 100.2g distilled water and add successively in a three-necked flask equipped with a condensing device, stir at room temperature at 20°C for 0.5h (stirring speed is 200rpm), and then Begin to slowly add 12.8g methyltriethoxysilane (MTES) (drop speed is 20 drops / min) to carry out emulsion polymerization, MTES drop finishes, begin to slowly add 2.3g CTES-1 again ...

Embodiment 2

[0046] A preparation method of a strawberry-like silver-loaded polysilsesquioxane nano-hybrid antibacterial material, comprising the steps of:

[0047] (1) Accurately weigh 33.0g of KH-540 and add it into a three-necked flask equipped with a condensing device. The system is heated up to 70°C, the stirring speed is controlled at 200rpm, and 20.0g of glutaric anhydride is added in batches. After the addition of glutaric anhydride is completed, Insulated for 2.5 hours to obtain a transparent liquid, i.e. reactive monomeric carboxysilane (CTES-2);

[0048] (2) Accurately weigh 1.2g of AEO3 and 1.2g of AEO9, 0.8g of sodium hydroxide catalyst and 500g of distilled water into a three-necked flask equipped with a condensing device in turn, stir at room temperature at 15°C for 0.5h (stirring speed is 300rpm), and then start Slowly add 37.1g methyltrimethoxysilane (MTMS) (dropping speed is 20 drop / min) to carry out emulsion polymerization, MTMS drops complete, begin to slowly add 10g CT...

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Abstract

The invention discloses a strawberry-shaped silver-loaded polysilsesquioxane nano hybrid antibacterial material and a preparation method thereof. The preparation method comprises the following three steps of (1) carrying out ammonolysis ring-opening reaction on amino silane and aliphatic dibasic acid anhydride to prepare carboxyl silane, 2) taking methyl silane and carboxyl silane as silicon sources, fatty alcohol-polyoxyethylene ether as a composite emulsifier, and alkali as a catalyst, performing emulsion polymerization to prepare narrow-dispersed polycarboxyl / methyl silsesquioxane nanospheres, and 3) by taking PCMSQ as a matrix and silver nitrate as a silver source, preparing the strawberry-shaped silver-loaded polysilsesquioxane nano hybrid antibacterial material by virtue of an in-situ reduction method. The preparation process is simple and convenient, the prepared Ag / PCMSQ antibacterial material is green, efficient, high in antibacterial capacity and long in aging, has good chemical stability and heat-resistant stability, effectively overcomes the defects that a single silver antibacterial agent is prone to discoloration, physiological toxicity and the like, and can be widelyused as an antibacterial coating material of matrixes such as textiles, leather, glass, ceramics, aluminum products and steel products.

Description

technical field [0001] The invention relates to the technical field of preparation of polymer nanocomposite materials, in particular to a strawberry-shaped silver-loaded polysilsesquioxane nano-hybrid antibacterial material and a preparation method. Background technique [0002] Antimicrobial materials have attracted the attention of researchers due to serious problems such as microbial contamination of solid surfaces. Inorganic antibacterial materials are widely used in textiles, medical equipment, ceramic sanitary ware, and food packaging, among which silver nanoparticles (Ag NPs) are considered to be the safest and most effective one, which can inhibit or even kill more than 650 kinds of bacteria. However, Ag NPs have large specific surface area, high surface energy, thermodynamic instability and easy agglomeration, which seriously affect the antibacterial activity of nano-silver, and can also produce cytotoxicity at high concentrations, endangering health. [0003] At p...

Claims

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Application Information

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IPC IPC(8): A01N25/10A01N59/16A01P1/00C08G77/08C08G77/26B82Y30/00B82Y40/00
CPCA01N25/10A01N59/16B82Y30/00B82Y40/00C08G77/08C08G77/26
Inventor 郝丽芬杨娇娇许伟刘红呐王学川
Owner SHAANXI UNIV OF SCI & TECH
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