Method for producing silver-carrying antibacterial sisal fibers

A kind of preparation method of silver-carrying antibacterial sisal fiberTechnical field

[0001] The present invention relates to the field of electroless plating of non-metallic materials, in particular to a method for preparing silver-loaded antibacterial sisal fiber.

Background technique

[0002] Sisal, as a common agave plant, is a type of perennial, fleshy, xerophyte herbaceous plant, which mainly obtains fiber from the leaf sheath. Sisal is the most widely used hard fiber in the world today. It has whiteness, tough texture (strong tensile strength), elasticity, resistance to seawater immersion, friction resistance, not easy to break, and has less glue and is not easy to slip. And other characteristics, it is the main economic crop for the production of hard fibers. In recent years, sisal (SF), as a kind of original ecological fiber, has the advantages of wide sources, economy, renewability, etc., and has attracted much attention and attention in various fields such as enterprises and scientific research. Traditionally, sisal fiber is mainly made into white brown rope, which is used in industrial and mining, electric power, metallurgy, transportation, agriculture, fishery, forestry, and navigation. The economic benefits of sisal fiber are mainly reflected by the development of deep processing and increasing product added value. Therefore, the functional research of sisal fiber has important social and economic significance. The research and development of new antibacterial fibers is the most important subject in the field of functional materials. The continuous development of new products of sisal fiber to improve its value is the development direction of sisal fiber research, and the research of sisal-based antibacterial fiber is the most important issue in the field of functional materials. The functionalization of hemp fiber opens up a new way.

Summary of the invention

[0003] The object of the present invention is to provide a method for preparing silver-loaded antibacterial sisal fiber.

[0004] The specific steps are:

[0005] (1) Soak 0.4-0. 6g of sisal fiber with detergent for 2-3 hours, then rub it with hands until it is clean, and then wash with steamed water to remove impurities on the surface of sisal and dry spare;

[0006] (2) The sisal fiber obtained in step (1) is soaked in a 2% sodium hydroxide solution by weight for 8 hours, and then washed to neutrality to remove the lignin in the sisal fiber. Glue drying for use;

[0007] (3) The sisal fiber prepared in step (2) is placed in a Soxhlet extractor for 24 hours, and the extract is a mixture of absolute ethanol and analytically pure cyclohexane in a volume ratio of 1 to Remove the pectin in the sisal fiber and dry it for later use;

[0008] (4) Put the sisal fiber obtained in step (3) into 35-45 mL of a silver nitrate solution with a molar concentration of 10 mmol/L, and place it under an ultraviolet lamp with a wavelength of 253.9 nm and a power of 20W. After 65 minutes, the sisal fiber is washed clean with steamed water and dried in a constant temperature drying box at 50 °C to obtain antibacterial sisal fiber.

[0009] The morphological characterization of the silver-carrying sisal fiber by scanning electron microscopy can clearly show that the existing particles are dispersed on the surface of the sisal fiber in nanometers, and the silver particles are not agglomerated. Using EDS to analyze the particles on the surface of the sisal fiber, it was determined that the nano-level particles were silver, and there were only three elements of C, H, and Ag. It was tested and analyzed by infrared spectrometer, and the results showed that silver mainly relies on the combination of non-chemical bond and sisal fiber.

[0010] The advantages of the present invention are:

[0011] 1. Silver is selected as an antibacterial agent, which has high antibacterial properties, and has the advantages of non-toxicity and other environmental friendliness; selecting the method of ultraviolet light irradiation reduction has the advantages of high reduction efficiency and reaction at room temperature.

[0012] Second, the electroless plating matrix-sisal fiber contains hydrophilic groups, that is, water absorption, so that the silver nitrate solution is well absorbed on the surface of the sisal fiber and in the structural space, so that the prepared silver particles Very good load on the sisal fiber sheet

surface.

[0013] Third, the antibacterial sisal fiber is immersed in an aqueous solution, and the antibacterial agent can be released for a long time and stably within a certain period of time, ensuring the antibacterial activity.

Detailed ways

[0014] Embodiment:

[0015] (1) Soak 0.5g of cut sisal fiber with Libai detergent for 2 hours, then rub it with hands until it is clean, and then wash it with steamed water to remove impurities on the surface of sisal and dry it for later use ;

[0016] (2) The sisal fiber obtained in step (1) is soaked in a 2% sodium hydroxide solution by weight for 8 hours, and then washed to neutrality to remove the lignin in the sisal fiber. Glue drying for use;

[0017] (3) The sisal fiber obtained in step (2) is placed in a Soxhlet extractor for 24 hours, and the extract is a mixture of absolute ethanol and analytically pure cyclohexane at a volume ratio of 1 to Remove the pectin in the sisal fiber and dry it for later use;

[0018] (4) Put the sisal fiber obtained in step (3) into a 40mL silver nitrate solution with a molar concentration of 10mmol/L, and place it under an ultraviolet lamp with a wavelength of 253.9nm and a power of 20W for 60 minutes, and then The sisal fiber is washed clean with steamed water and dried in a constant temperature drying box at 50 °C to obtain the antibacterial sisal fiber.