Method for preparing polyvinyl alcohol magnetic film
A polyvinyl alcohol and magnetic film technology, applied in spinning solution preparation, filament/thread forming, textile and paper making, etc., can solve the problems of poor bonding between film and substrate, poor process repeatability, low deposition rate, etc. , to achieve the effects of excellent magnetic properties, shortened production time, and simple preparation process
Inactive Publication Date: 2011-08-10
SUZHOU UNIV
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[0004] In the Chinese invention patent "a magnetic thin film and its manufacturing method" (CN1240840), a direct current target reactive sputtering method is used to place a titanium sheet or a cobalt sheet on the surface of an iron target, and Si or NaCl is used as a substrate to prepare a A magnetic thin film with high saturation magnetization, but the disadvantages of the sputtering method are: the deposition rate is low, and the substrate will be subjected to plasma radiation, etc., resulting in temperature rise
The Chinese invention patent "A method of depositing a magnetic thin film on a flexible substrate" (CN101100742) provides a method for depositing a magnetic thin film on a flexible substrate. In the preparation process, the evaporation method is used to coat the flexible substrate. , but the film formed by the evaporation method is poorly bonded to the substrate and the process repeatability is not good
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Embodiment 1
[0021] 1. Fe with good dispersibility 3 o 4 Preparation of aqueous solution system
[0022] Sodium dodecylbenzenesulfonate (C 18 h 29 NaO 3 S), citric acid (C 6 h 8 o 7 ·H 2 O) and egg protein powder (LDB) as a dispersant for Fe 3 o 4 Disperse processing.
[0023] Add equal amounts of the above-mentioned dispersants into conical flasks containing equal amounts of deionized water respectively, and stir at the same speed for 0.5 hours. According to the mass ratio, the dispersant: Fe 3 o 4 = 1:1 add the same amount of nano-Fe respectively 3 o 4 Particles were dispersed by ultrasonic oscillation at a frequency of 45kHz for 10 minutes. Leave it for a day to observe its dispersion effect: C 18 h 29 NaO 3 S and C 6 h 8 o 7 ·H 2 Nano-Fe in Erlenmeyer flask with O as dispersant 3 o 4 The particles are all precipitated, and the solution is colorless; the nano-Fe in the Erlenmeyer flask with LDB as the dispersant 3 o 4 Particles were only partially precipitated a...
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Abstract
The invention discloses a method for preparing a polyvinyl alcohol magnetic film, which comprises: dissolving egg albumen powder serving as a dispersant in deionized water, adding nanoscale Fe3O4 powder, and performing ultrasonic dispersion treatment to obtain a nano Fe3O4 aqueous solution system, wherein the mass ratio of the egg albumen powder to the Fe3O4 is 2:1; adding the system into aqueoussolution of polyvinyl alcohol to prepare a spinning solution, wherein the polyvinyl alcohol concentration of the spinning solution is 6 to 9 weight percent, and the Fe3O4 concentration is (0.2 to 4)*10<-3>g / mL; and obtaining a nano fiber-like polyvinyl alcohol magnetic film by using an electrostatic spinning process. In the invention, a nontoxic and nonirritating surface dispersant is used, the dispersion effect is desirable, the preparation process of the magnetic film is simple and the obtained magnetic film has stable performance and high magnetic performance.
Description
technical field [0001] The invention relates to a method for preparing a polyvinyl alcohol magnetic thin film material, in particular to a method for preparing a polyvinyl alcohol magnetic thin film material by an electrospinning process, and belongs to the technical field of magnetic material preparation. Background technique [0002] Polyvinyl alcohol (PVA) is a water-soluble polymer obtained by hydrolyzing polyvinyl acetate. It has good chemical stability and biocompatibility, is non-toxic, has good permeability to water, and has a good Good spinnability and film-forming properties. The PVA polymer material with good biocompatibility is adopted, and water can be used as a solvent, avoiding the use of toxic organic solvents. Nano Fe 3 o 4 It has good paramagnetism and biological safety, and has shown good application prospects in bioseparation, biodetection, and drug carriers. Fe supported by PVA 3 o 4 Magnetic nanofibers have good fiber morphology and mechanical pro...
Claims
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IPC IPC(8): D01F6/50D01F1/10D01D1/02D01D5/00
Inventor 戴礼兴魏广钊迟恒煊
Owner SUZHOU UNIV
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