蘸取预制泰勒锥的纳米纤维高产电纺制造基础研究

项目名称： 蘸取预制泰勒锥的纳米纤维高产电纺制造基础研究

项目编号： No.51205334

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 机械工程学科

项目作者： 吴德志

作者单位： 厦门大学

项目金额： 25万元

中文摘要： 实现纳米纤维的批量制造是其在材料、生物医学、能源及微纳米器件等领域获得应用的关键。针对传统电纺的效率低、射流不稳定和溶液粘稠化等缺陷，提出蘸取预制泰勒锥的高产电纺方法：针尖阵列插入水平聚合物溶液表面后迅速抽离，溶液变形成泰勒锥，强电场作用下锥顶产生稳定射流，经不稳定运动和溶剂挥发得到纳米纤维，实现了高产量、低电压、无需清洗和电纺结果（纤维直径、表面质量和沉积分布）良好的有机结合。本项目研究蘸取预制泰勒锥的纳米纤维高产电纺制造的基本问题和关键技术，主要包括：电纺的高产机理与基本规律、泰勒锥稳定持续射流临界条件、蘸取预制泰勒锥行为方式和阵列化泰勒锥的设计规则等。阐明蘸取预制泰勒锥电纺高产的内在机制；构建临界电压与溶液浓度、电极间距、针尖阵列结构和针尖抽离速度等的关系；优化蘸取泰勒锥行为方式；揭示阵列泰勒锥的分布对电纺结果的作用规律，有助于加深对批量电纺、电液动力学控制行为这一类科学问题的认识。

中文关键词： 纳米纤维；静电纺丝；蘸取；高产量；泰勒锥

英文摘要： It is important to manufacture nanofibers with high throughput in their applications of materials, biomedicine, energy and micro/nano devices etc. In order to overcome the intrinsic problems of poor productivity, jet instability and solution solidification in traditional electrospinning, a novel method of high-throughput electrospinning via dip-in prefabricated Taylor cone is brought forward. tips array are used to insert into the planar surface of polymer solution and withdraw quickly to prefabricate Taylor cones. Under the strong electric field, steady jets are issued from the crests of the cones and they turn into nanofibers after encountering bending instabilies and solvent volatilization. Such method can realize the organic integration of high throughput, low voltage, free of cleaning and good results (diameter, surface morphology and deposition distribution). This project focuses on the fundamentals and key technologies of high-throughput electrospinning via dip-in prefabricated Taylor cone, including mechanism and basic rules of high-throughput, critical conditions of stable and continuous jet, behavior of dipping and the design rules of Taylor cone array, etc. The objective of this project is to clarify the intrinsic mechanism of high throughput in electrospinning via dip-in prefabricated Taylor cone and

英文关键词： Nanofiber；Electrospinning；dip-in；High-throughput；Taylor cone