静电纺长程螺旋碳纤维的构筑及其形成机理研究

Helical carbon fibers (HCFs) possess special characteristics of micro-spring structure, micro-solenoid coil character and chirality, and HCFs have found many applications, such as wave-absorbed and stealthy materials, flexiable sensors, fiber toughened and reinforced composites, supercapacitor electrode materials, and so on. However, traditional HCFs by chemical vapor deposition (CVD) have disadvantages of complex fabrication procedure, long helical distance, and uncontrollable chirality. Therefore, it is highly desired to develop novel fabrication method and further investigate the formation mechanism of HCFs. This project adopts a mechanism of asymmetric contraction from two different components and uses side-by-side (SBS) electrospining to construct SBS electrospun fibers and electrospun HCFs (EHCFs) with long helical distance. To precisely control the structure and propose the formation mechanism by SBS electrospinning, this project will investigate the effects of synthesis conditions, electrospinning parameters, photo-crosslinking, thermal responsive temperature, freeze-drying and carbonization procedure on the interface of SBS electrospun fibers and the formation of long helical distance EHCFs. The implementation of this project will open a new door for the formation of long helilcal distance HCFs, and promote the development of electrospining in the formation of special carbon materials.

螺旋碳纤维具有独特的微弹簧特性，微螺线圈特性和手性特性，因而在吸波隐身材料，柔性传感器，纤维增强增韧复合材料，超级电容器材料等有着广泛的应用。但是传统的利用化学气相沉积构筑螺旋碳纤维的方法存在制备工艺条件比较苛刻，螺旋长度（螺程）较短，螺旋手性不可控等缺点。因此急需开发螺旋碳纤维的新型构筑方法及探究其构筑原理。本项目利用双组分非对称收缩的原理，采用肩并肩静电纺丝的方法，研究合成条件，纺丝参数，光交联条件，温度响应条件，冷冻干燥和碳化条件对肩并肩电纺纤维的界面影响以及对长程螺旋碳纤维成型的影响规律，实现对长程螺旋碳纤维的螺旋结构进行精准控制，并揭示长程螺旋碳纤维的构筑机理。本项目的实施将为螺旋碳纤维的构筑提供新的思路，同时拓展静电纺丝技术在构筑特种碳材料上的应用。

螺旋碳纤维具有独特的微弹簧特性，微螺线圈特性和手性特性，因而在吸波隐身材料，柔性传感器，纤维增强增韧复合材料，超级电容器材料等有着广泛的应用。但是传统的利用化学气相沉积构筑螺旋碳纤维的方法存在制备工艺条件比较苛刻，螺旋长度（螺程）较短，螺旋手性不可控等缺点。本项目利用双组分非对称收缩的原理，采用肩并肩静电纺丝的方法，通过优化合成条件，纺丝参数，光交联条件，响应温度，冷冻干燥和碳化条件等成功构筑了肩并肩电纺纤维及相应的螺旋纤维，从而实现了对长程螺旋碳纤维的螺旋结构的精准控制，并进而揭示了长程螺旋碳纤维的构筑机理。该项目的成功实施为螺旋碳纤维的构筑提供了新的思路，同时拓展了静电纺丝技术在构筑特种碳材料上的应用。