Method for preparing piezoelectric nanofiber membrane
A nanofiber membrane, nanofiber technology, applied in fiber processing, fiber chemical characteristics, electrospinning and other directions, can solve the problems of low piezoelectric performance of polyvinylidene fluoride, achieve simple process, improved piezoelectric performance, raw materials Inexpensive and accessible effects
Inactive Publication Date: 2019-07-09
NANJING UNIV OF SCI & TECH
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[0004] The purpose of the present invention is to solve the shortcomings of existing polyvinylidene fluoride such as low piezoelectric performance, and to provide a preparation method of piezoelectric nanofiber membrane. Compared with simple polyvinylidene fluoride nanofiber membrane Fiber, with high piezoelectric performance, and non-toxic and harmless
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[0019] The present invention will be further clarified below in conjunction with specific embodiments and accompanying drawings.
[0020] First, take 0.6ml of DMF and 0.4ml of acetone, put 2mg of sucrose in the mixed solution of DMF and acetone, and stir with a magnetic stirrer until all the sucrose is dissolved. After the sucrose is completely dissolved, add 0.2g of polyvinylidene fluoride, and continue stirring until the polyvinylidene fluoride is completely dissolved. Afterwards, the mixed solution of polyvinylidene fluoride / sucrose is subjected to electrospinning, and the spun filaments are carried by an aluminum foil motor to obtain a polyvinylidene fluoride / sucrose piezoelectric nanofiber membrane. At the same time, we used the above method to prepare pure polyvinylidene fluoride nanofiber membranes as a comparison group for piezoelectric properties. The results are shown in the figure, and it can be seen that the piezoelectric performance of the polyvinylidene fluoride...
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Abstract
The invention discloses a method for preparing a piezoelectric nanofiber membrane. The method comprises the following steps: placing a certain amount of sucrose in a mixed solvent of N, N dimethylformamide and acetone, and stirring by using a magnetic stirrer until all the sucrose is dissolved; adding polyvinylidene fluoride into the solvent in which the sucrose is dissolved, and stirring by usingthe magnetic stirrer until the polyvinylidene fluoride is completely dissolved; and spinning the polyvinylidene fluoride / sucrose solution by adopting electrostatic spinning equipment, and receiving by using an aluminum electrode to obtain the polyvinylidene fluoride / sucrose piezoelectric nanofiber membrane. The process is simple, and raw materials are simple and easily obtained, and are non-toxicand harmless. Compared with a polyvinylidene fluoride nanofiber membrane, the prepared polyvinylidene fluoride / sucrose piezoelectric nanofiber membrane has the advantages that the piezoelectric performance of the prepared polyvinylidene fluoride / sucrose piezoelectric nanofiber membrane is improved greatly, the good biocompatibility of polyvinylidene fluoride is kept, and the polyvinylidene fluoride / sucrose piezoelectric nanofiber membrane has wide application prospects in the aspects of sensors, implantable biological devices and the like.
Description
technical field [0001] The invention belongs to the technical field of membrane material preparation, and in particular relates to a preparation method of a piezoelectric nanofiber membrane. Background technique [0002] In recent years, piezoelectric polymer materials represented by polyvinylidene fluoride (PVDF) have received extensive attention. Piezoelectric polymer materials not only have good piezoelectric properties, but also have advantages such as elasticity and plasticity that traditional piezoelectric ceramics cannot match. The PVDF plastic film after mechanical stretching and electric field polarization has the characteristics of high sensitivity, good biocompatibility and excellent stability in complex environments. These characteristics make piezoelectric polymer materials widely used in sensing and driving materials. Studies have shown that there are α, β, γ, δ and ε crystal forms in PVDF, and increasing the proportion of β phase is the most important factor ...
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IPC IPC(8): D04H1/728D04H1/4318D01D5/00D01F1/10
CPCD01D5/003D01F1/10D04H1/4318D04H1/728
Inventor 冯章启金飞严珂袁旭李通史传梅李瑞杜丽娟
Owner NANJING UNIV OF SCI & TECH