基于近场电纺直写的微纳3D打印平台搭建及其图案精确沉积性能研究

发布时间：2018-01-02 17:01

本文关键词：基于近场电纺直写的微纳3D打印平台搭建及其图案精确沉积性能研究　出处：《深圳大学》2017年硕士论文　论文类型：学位论文

【摘要】：微纳3D打印发展至今,在技术上已经取得了不少的突破和进展,尤其是柔性电子、微传感器、微流控芯片等微纳米器件具有巨大的发展潜力。微纳3D打印是快速成型制造的发展前沿。本课题提出了一种基于近场电纺直写的微纳3D打印新工艺,并自行搭建了近场直写的静电纺丝平台。近场静电纺丝技术通过减小纺丝距离从而降低纺丝电压,不仅可以减少能耗,也有效地解决了传统远场静电纺丝过程的高电压不安全性、沉积成形效果不稳定等问题。但是距离短、电压低也会带来沉积图案的精度低、成形效果不好等一系列问题。本文针对近场静电纺丝技术现存的问题,主要的研究工作和结论可以归纳一下几点:(1)高精度的设备是进行近场静电纺丝技术研究的基础,根据课题的需要,自主搭建了一套静电纺丝设备,设计开发各个子系统,包括三轴运动系统、成形环境系统、材料输送系统和数控系统,搭建了完整的电纺平台。(2)理论分析了电场在静电纺丝中的作用,利用Ansoft maxwell软件进行了单个喷头模式的电场仿真。这样可以直观且快捷地模拟出理想情况下的电场分布情况,得到的结果是:垂直向下的喷头左右两侧分布的电场电势和电场强度是均匀的,电场方向是朝着收集板所在位置发射,喷头表面电势最大,喷头最大电场强度位置位于喷头口处,方向垂直收集板向下。(3)针对基板速度、工作电压、工作距离、运动突变等因素对近场电纺纤维丝的成形的影响。总结出了比较好的近场电纺丝直写工艺:浓度在10%的PVA溶液,工作电压在2kV,基板速度150mm/s,喷头到基板间距2mm。基于单层纤维丝图案的沉积规律来实现多层纤维丝沉积图案化,还对多层图案化精确沉积的实现进行探讨。通过初步研究,加深了对近场直写静电纺丝的认识,初步掌握了电纺直写的工艺参数,为后续通过电纺工艺来完成3D打印微纳米器件等研究提供了实验基础。
[Abstract]:Micro nano 3D printing development has a lot of breakthroughs and progress has been made in technology, especially the flexible electronics, micro sensors, micro nano devices such as microfluidic chip has great potential for development. The micro nano 3D printing is the forefront of the development of rapid prototyping and manufacturing. This paper proposes a near-field electrospinning based on straight write the new micro nano technology of 3D printing, and built up the near-field electrospinning direct writing platform. Near field electrospinning technique by reducing the spinning distance so as to reduce the spinning voltage, can not only reduce energy consumption, but also effectively solve the traditional far field electrospinning process of high voltage safety problems, such as the effect of instability deposition. But a short distance, low voltage will also bring the deposition pattern of low precision, a series of problems forming effect is not good. Aiming at the existing problems of electrospinning technique in near field, the main research work and conclusions can be To sum up the following points: (1) high precision equipment is based near field electrospinning technology research, according to the requirements of the project, we build a set of electrostatic spinning equipment, the development of each subsystem design, including three axis motion system, forming system, material conveying system and control system, set up the electric spinning platform complete. (2) the theoretical analysis of the effect of electric field in electrostatic spinning, the electric field simulation of a single nozzle model using Ansoft Maxwell software. This intuitive and fast simulation of electric field distribution under ideal conditions, the result is: the vertical distribution of electric potential on both sides of the nozzle and the electric field intensity is uniform, the electric field direction is toward the collecting plate location of emission, the surface potential maximum nozzle, nozzle the maximum electric field strength is located at the mouth of the nozzle, perpendicular to the direction of the collector plate (3) for downward. The substrate speed, working voltage, working distance, motion and other factors on the forming effect of mutation of electrospun fiber filament near field. Summed up the near field electrospinning good direct writing process: concentration in 10% PVA solution, the working voltage is 2kV, the speed of 150mm/s nozzle to substrate, substrate distance 2mm. deposition of single fiber the silk pattern based on multi-layer fiber deposition of patterned multilayer patterned, also deposited precisely are discussed. Through preliminary research, deepen the understanding of the electrospinning direct writing near field, initially mastered the technology parameters of electrical spinning direct writing, through the electrospinning process for the follow-up to complete 3D printing to provide experimental basis for the study of micro and nano devices.

【学位授予单位】：深圳大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP391.73

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