Research On The Preparation Of Instant Nanofiber Facial Mask Based On Multi-needle Electrospinning

Facial mask market is expanding rapidly.It is predicted that the average annual growth rate of facial mask market will be about 15% in the next five years,and will exceed 45 billion yuan by 2023.Ordinary facial masks are mostly made of ordinary non-woven fabrics as the base fabric of the mask to be used with the essence.Generally,preservatives are added.At the same time,they are easily affected by the external environment and are easily oxidized,resulting in the deterioration of the mask and the occurrence of allergic skin reactions.In addition,traditional facial masks have problems such as poor adhesion to the skin,poor air permeability,insufficient absorption of nutrient solution,and easy dripping.The emergence of nanofiber masks not only solves these problems,but also meets the growing needs of consumers,and is constantly developing towards high-end masks.Therefore,it is of great significance to develop a new type of solid-state non-corrosion-free instant nanofiber mask that can be prepared on a large scale by combining electrospinning technology for occupying the high-end mask product market.In this thesis,a multi-needle electrospinning device with a trapezoidal arrangement is designed and built.The stability of the multi-jet is improved by the simulation analysis and optimization of the nozzle module.The device is used to further explore the preparation process of nanofiber instant mask.Finally a new type of instant nanofiber moisturizing mask was obtained by comprehensively analyzing the properties of the nanofiber mask.The main research work of this thesis is as follows:（1）The functional requirements of the multi-needle electrospinning device were analyzed,and the key modules required in the device were determined and selected:multi-needle nozzle module,liquid supply module,high-voltage power supply module,collection module and environmental control module.Aiming at the problems of uneven film formation and small output of the single-needle electrospinning device,a multi-needle electrospinning device with a trapezoidal arrangement was successfully built and its working steps were described in detail,realizing the efficient production of nanofiber facial masks.Further promote the industrial application of nanofiber mask.（2）The edge phenomenon of the electric field at the needle tip of the multi-jet electrospinning was studied and the multi-needle module of the multi-needle electrospinning device was modeled using COMSOL Multiphysics.The electric field simulation of nozzles with other structures is carried out and the influence of different arrangement methods on the uniformity of the electric field of the needle tip is analyzed and the isosceles trapezoidal multi-needle arrangement method with a relatively uniform electric field is established.Based on the above research,the influence of three parameters of different needle radius,voltage and collection distance on the multi-needle electric field in the isosceles trapezoid arrangement was analyzed.（3）Based on the multi-needle electrospinning device,a new PEO/collagen peptide nanofiber mask was developed,and the effects of different spinning solution mixing ratio,spinning voltage,collection distance and liquid supply speed on the new PEO/collagen peptide nanofiber were investigated.The influence law of the micro-morphology of the facial mask,when the spinning solution is 20% collagen peptide solution,the spinning voltage is 30 k V,the collection distance is 19 cm,and the liquid supply speed is 130 ml/h under the process conditions of optimal facial mask morphology.（4）The comprehensive properties of the prepared PEO/collagen peptide novel nanofiber mask were analyzed.First,five groups of PEO/collagen peptide nanofiber masks with different ratios were tested by infrared spectroscopy and mechanical properties respectively.The results showed that the characteristic peaks corresponding to collagen appeared in the infrared spectrum,which proved that the collagen peptides were successfully loaded on the nanofibers.In the facial mask,the proportion of collagen peptides in the fibrous membrane and the diameter of the fibers will affect the mechanical properties of the PEO/collagen peptide fibrous membrane.then,5 groups of PEO/collagen peptides with different ratios and 4 groups of PEO/collagen peptides with the same ratio but different thicknesses were tested.The nanofiber mask was tested for moisturizing performance.The results showed that as the amount of collagen peptide added increased,the moisturizing performance was stronger.the thicker the mask,the better the moisturizing performance.Considering comfort and actual product sales,The optimal thickness of the PEO/collagen peptide nanofiber mask is 20 μm.Finally,the instant effect of the solid nanofiber mask was explored,and a new type of instant nanofiber mask that was instantly dissolved,the skin could quickly absorb the functional molecules and was easy to use was obtained.