掺杂聚二乙炔的微纤维制备与性质研究

发布时间：2018-05-16 04:38

本文选题：PDA/PS + PDA/PDMS　；参考：《中国科学技术大学》2017年硕士论文

【摘要】：聚二乙炔(PDA)材料因其准一维共轭的高分子骨架具有独特的环境响应性,在光波导、光电传感、仿生学等领域具有广泛的应用前景。本论文工作主要分为两部分:聚二乙炔/聚苯乙烯(PDA/PS)静电纺丝微纤维阵列模拟昆虫复眼自然感杆束结构及聚二乙炔/聚二甲基硅氧烷(PDA/PDMS)微纤维用作柔性传感器。大多数昆虫眼睛的视觉色素是二向色性的(即根据其极化轴不同吸收不同的光),这赋予了他们在天空中惊人的导航能力。在过去的几年中,有大量的研究集中在人造生物光学系统,包括"复眼"数码相机和人工复眼等,然而关于制造昆虫复眼的感光细胞---偏振敏感的人工感杆束的研究还很少。文中我们制造了PDA/PS静电纺丝微纤维,证明PDA/PS微纤维表现出极强的极化波导特性,这个现象依赖于PDA主链在纤维内的有序排列,且与传播距离或激发光的波长无关。此外,三根具有不同极化波导行为的PDA/PS微纤维可以组装在一起来模仿昆虫眼睛的自然感杆束阵列,单根PDA/PS微纤维的物理尺寸,结构,功能可与自然感杆相媲美。传感器被誉为人的感官,我们现在的生活已经离不开它,但是现有传感器因材料本身性质的限制,不能被任意塑型,所以柔性传感器成为当今的热门研究领域。微纤维因其具有体积小、质量轻、灵敏度高等优点,相比于传统的传感器,更易微型化、集成化和分布式感知,在电子皮肤、生物医药、可穿戴设备、航空航天等领域都将有广泛应用。聚二甲基硅氧烷(PDMS)易于在空气的界面上浓缩,使得材料有疏水的自保护涂层,可用于生产纤维。我们设计了一种掺杂PDA的PDMS纤维,在不同的拉力条件下,其极化波导特性会随之改变,拉伸长度越长,其荧光极化程度越大,且极化方向发生变化,为柔性光传感器件制备提供了基础。
[Abstract]:Poly (diacetylene) PDAs have a wide range of applications in optical waveguide, photoelectric sensing, bionics and other fields because of their unique environmental response due to their quasi-one-dimensional conjugated polymer framework. The work of this thesis is divided into two parts: Poly (diacetylene / polystyrene PDA-PS) electrospinning microfiber array simulates the structure of insect compound eye natural sensing rod and polydiacetylene / polydimethylsiloxane (PDA / PDMS) microfiber is used as flexible sensor. The visual pigments of most insect eyes are dichromatic (that is, they absorb different light according to their polarized axis, which gives them amazing navigation ability in the sky. In the past few years, a great deal of research has been focused on artificial biological optical systems, including "compound eye" digital camera and artificial compound eye. However, few studies have been done on the photosensitive cells of insect compound eye-polarization-sensitive artificial sensing rod bundle. In this paper, we have fabricated PDA/PS electrospun microfibers, which proves that PDA/PS microfibers exhibit extremely strong polarization waveguide characteristics, which depends on the ordered arrangement of the main chains of PDA in the fibers and is independent of the propagation distance or the wavelength of excited light. In addition, three PDA/PS microfibers with different polarization waveguides can be assembled together to mimic the natural rod array of insect eyes. The physical size, structure and function of a single PDA/PS microfiber are comparable to those of the natural sensing rod. Sensors are regarded as human senses, and our life is inseparable from them. However, due to the limitation of material properties, the existing sensors can not be shaped arbitrarily, so flexible sensors have become a hot research field. Because of its advantages of small size, light weight and high sensitivity, microfiber is easier to be miniaturized, integrated and distributed than traditional sensors, in electronic skin, biomedicine, wearable devices, etc. Aerospace and other fields will have a wide range of applications. Poly (dimethylsiloxane) (PDMS) is easy to concentrate at the interface of air, which makes the material have hydrophobic self-protective coating, which can be used to produce fiber. We have designed a kind of PDMS fiber doped with PDA. Under different tension conditions, the characteristics of polarized waveguide will change. The longer the stretching length, the greater the fluorescence polarization degree and the polarization direction. It provides a basis for the fabrication of flexible optical sensor devices.
【学位授予单位】：中国科学技术大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ340.64

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