Electrostatic spray-spinning equipment and method for making micro nano fiber bracket
A fiber scaffold and fiber technology, applied in electrospinning, fiber processing, textiles and papermaking, etc., to achieve rapid processing, high porosity, and the effect of facilitating cell growth
Inactive Publication Date: 2019-11-05
CHONGQING UNIV
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Problems solved by technology
Compared with electrospinning technology, the processing equipment of air-jet technology is simpler and the processing speed is faster (it can be increased by more than 10 times); due to the dispersion effect of high-pressure air, the processed micro-nano fibers are loosely arranged in bundles, Larger pore size and higher porosity are more conducive to cell growth, but the mechanical strength of the processed fiber scaffold is significantly lower than that of electrospun fibers[5]
Method used
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[0043] In order to make the electrostatic spray spinning equipment and electrostatic spray spinning process described in the present invention easier to understand, the following takes the processing of polylactic acid micro-nano fiber scaffolds as an example to further clarify the use of electrostatic spray spinning equipment and the electrostatic spray spinning processing method:
[0044] Prepare a polymer solution, taking polylactic acid solution as an example: polylactic acid (M w =100 kDa, PDI=1.4) were stirred and dissolved overnight in 1,4-dioxane to prepare polylactic acid solutions with concentrations of 8 wt%, 12 wt%, and 16 wt%.
[0045]
[0046] according to figure 1 As shown in the assembly equipment, the high-pressure air source is the high-pressure air provided by the air compressor; the micro-nano fiber support is processed according to the parameters set in Table 1. The specific process is: fix the spray gun 202 on the spray gun support 207, adjust the fib...
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The invention discloses electrostatic spray-spinning equipment and method for making a micro nano fiber bracket. The equipment includes a material hopper, a fiber nozzle and a grounded fiber receiver,and the nozzle is internally and axially provided with a metal cylindrical fine needle connected with a high-voltage direct current power supply. According to the preparation method, a polymer solution forms a micro nano polymer solution flow under the dispersion and drive action of high-pressure gas, and micro nano fiber is formed through high-pressure gas; air is ionized and adsorbed to the micro nano polymer solution flow through direct current high-voltage electricity and forms electrostatic difference with a receiver to generate electrostatic force, the electrostatic force pulls a polymer chain to promote chain orientation and crystallization, and the fiber mechanical property of the fiber is improved through the electrostatic force. The processing speed of the equipment is obviouslyhigher than that of electrostatic spinning, electrostatic spray-spinning is comparable to an air jet technology, and the mechanical property of the micro nano fiber obtained through electrostatic spray-spinning is excellent than that of fiber obtained through a traditional air jet process. Compared with a traditional electrostatic spinning process and a traditional air jet process, a micro nano fiber bundle obtained by the equipment is looser, has higher porosity and is more conducive to cell ingrowth.
Description
technical field [0001] The invention relates to a method and a device for manufacturing a uniform nanofibrous web, in particular to an electrostatic spray spinning device and a method for making a micro-nano fiber support. Background technique [0002] In the field of regenerative medicine, tissue engineering scaffolds play a pivotal role in the repair and reconstruction of missing or functionally damaged tissues and organs [1]. Nanofibrous scaffolds have attracted much attention because of their similar structure to natural collagen fiber extracellular matrix, and their advantages in promoting cell adhesion, proliferation, and differentiation[2-4]. Currently, the most commonly used processing methods for micro-nanofibrous scaffolds are electrospinning and air-brushing or air-blowing [5, 6]. Both techniques have their pros and cons. Electrospinning technology uses the formation of Tylor cone of polymer solution under high electrostatic effect to prepare micro-nano fibers. ...
Claims
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IPC IPC(8): D01D5/00
CPCD01D5/003D01D5/0069D01D5/0076D01D5/0092
Inventor 罗彦凤张钰清王锡婉王旭芳
Owner CHONGQING UNIV