【作者】 麦仁标；

【导师】 陈桪； 朱自明；

【作者基本信息】 广东工业大学 ， 机械工程（专业学位）， 2022， 硕士

【摘要】 我国面膜市场迅速扩张,据预测我国面膜市场规模在未来五年内年均增速约为15%,到2023年将突破450亿元。普通面膜大多使用普通非织造布面料作为面膜基布搭配精华液使用,一般添加防腐剂,同时易受外部环境的影响,很容易被氧化,导致面膜变质,产生皮肤过敏反应。此外,传统面膜存在与皮肤贴合度较差、透气性差、营养液吸收不充分和容易滴液等问题。而纳米纤维面膜的出现不仅解决了这些问题,还满足消费者日益增长的需求,在不断向面膜高端化发展。因此,结合静电纺丝技术研制一种可大规模制备的固态无防腐新型速溶纳米纤维面膜,对占有高端面膜类产品市场具有重大意义。本文设计与搭建了一种梯形排布方式的多针静电纺丝装置,通过对喷头模块进行仿真分析与优化,提高了多射流的稳定性,并使用该装置深入探究纳米纤维速溶面膜的制备工艺,最后综合分析纳米纤维面膜的性能,得到了一种新型速溶纳米纤维保湿面膜。本论文的主要研究工作如下:(1)分析了多针静电纺丝装置的功能需求,确定并选择了装置中所需的关键模块:多针头喷头模块、供液模块、高压电源模块、收集模块和环境控制模块。针对单针静电纺丝装置成膜不均匀和产量小等问题,成功搭建了一种梯形排布方式的多针静电纺丝装置并详细阐述了其工作步骤,实现了纳米纤维面膜的高效生产,进一步推动了纳米纤维面膜的产业化应用。(2)研究了多射流静电纺丝针尖电场出现的边缘现象,并使用COMSOL Multiphysics5.6a软件对多针静电纺丝装置的多针头模块建模,通过对双列线性、等边三角形、等腰梯形排布等结构喷头的电场仿真,探究了不同排布方式对针尖电场均匀性的影响规律,确立了拥有比较均匀电场的等腰梯形多针头排布方式。基于以上研究,又分析了不同针头半径、电压和收集距离三个参数对等腰梯形排布方式的多针电场的影响规律,提高多射流的稳定性。(3)基于该多针静电纺丝装置,研制了PEO/胶原蛋白肽新型纳米纤维面膜,并探究了不同纺丝溶液混合比例、纺丝电压、收集距离以及供液速度对PEO/胶原蛋白肽新型纳米纤维面膜微观形貌的影响规律,当使用纺丝液为20%胶原蛋白肽溶液,纺丝电压为30k V,收集距离为19cm,供液速度为130ml/h的工艺条件下面膜形貌最优。(4)对制备的PEO/胶原蛋白肽新型纳米纤维面膜的综合性能进行了分析。首先,对五组不同配比的PEO/胶原蛋白肽纳米纤维面膜分别进行红外光谱检测和力学性能检测,结果发现红外光谱有对应胶原蛋白的特征峰出现,证明了胶原蛋白肽成功负载在纳米纤维面膜中,纤维膜中胶原蛋白肽的比例及纤维的直径都会影响PEO/胶原蛋白肽纤维膜的力学性能;接着对5组不同配比和4组配比相同但厚度不同的PEO/胶原蛋白肽纳米纤维面膜进行保湿性能测试,结果表明随着胶原蛋白肽添加量的增大,保湿性能越强;面膜的厚度越厚,保湿性能越好。最后探究了固态纳米纤维面膜的速溶效果,得到了瞬间溶解、皮肤可快速吸收功效分子且使用方便的新型速溶纳米纤维面膜。更多还原

【Abstract】 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.更多还原