光谱特性可调控材料及共轭体系激光限幅材料研究
发布时间：2018-11-02 19:22
【摘要】：本论文以功能材料在光电防护领域应用为背景,探索新型光电功能材料的技术原理和实现方法。一方面以聚苯胺及其衍生物、手征性向列相液晶、稀土离子共掺杂氟氧化物玻璃为基础,研究了光谱特性可控的膜层材料。另一方面以富勒烯C60、碳纳米管、石墨烯等共轭体系材料为基础,研究了基于非线性光学原理的激光限幅技术。 本论文的主要工作和结论如下： (1)通过电化学聚合、电化学掺杂聚合方法,制备并研究了聚苯胺及其衍生物薄膜电致变色性能。实验表明,制备的二苯胺磺酸钠掺杂聚合的聚苯胺薄膜分布均匀,整体附着力、响应速度快,具有较佳的电致变色性能。 (2)合成了六种手性1,2-丙二醇衍生物,加入向列相液晶后,可诱导形成了具有热致手性翻转性质的N*相液晶。通过调整具有热致手性翻转特性的手性衍生物和左旋、右旋手性化合物的组成比例,可制备螺距随温度变化可控的N*相液晶。 (3)提出了选用氟化物基质和共掺杂Er3+/Nd3+,调整能级之间竞争及辐射和无辐射跃迁的竞争关系,氟氧化物玻璃和氟氧化物玻璃陶瓷的荧光谱验证了稀土离子上转换及中红外发光性质,提高了Er3+掺杂的中红外发光性能。 (4)采用原位聚合和乳液聚合的方法制备了聚苯胺-碳纳米管、聚苯乙烯-碳纳米管、聚苯乙烯-C60和聚噻吩-C60复合物。1064nm,40ps脉冲Z-扫描实验表明：四种复合物样品有较强的非线性吸收和光限幅性能。富勒烯C60基复合物光限幅机理是单重激发态非线性反饱和吸收,碳纳米管基复合物的光限幅机理是非线性吸收并诱导散射。共轭体系间相互作用对增强非线性光学性质及光限幅性能具有重要意义。 石墨烯及单壁碳纳米管样品制备悬浮液,进行532nm、1064nm,10ns脉宽激光限幅实验,结果表明：样品悬浮液对ns脉冲激光都有宽带限幅性能。利用限幅阈值高低不同的SWNTs-NMP和G-CB分别作为前、后级限幅器制作串联型光限幅器,实现了超低阈值和较高损伤阈值的光限幅性能。石墨烯和单壁碳纳米管悬浮液的光限幅是吸收诱导散射的一种机制。
[Abstract]:Based on the application of functional materials in the field of optoelectronic protection, this paper explores the technical principles and implementation methods of new optoelectronic functional materials. On the one hand, based on Polyaniline and its derivatives, chiral nematic liquid crystal and rare earth ion co-doped fluorooxide glass, the controllable spectral properties of the film were studied. On the other hand, based on the conjugated materials such as fullerene C60, carbon nanotubes and graphene, the laser limiting technique based on nonlinear optical principle is studied. The main work and conclusions are as follows: (1) Electrochromic properties of Polyaniline and its derivatives thin films were prepared and studied by electrochemical polymerization and electrochemical doping polymerization. The experimental results show that the prepared Polyaniline films doped with sodium diphenylamine sulfonate have good electrochromic properties, such as uniform distribution, overall adhesion, fast response speed and good electrochromic properties. (2) six chiral 1,10-propanediol derivatives were synthesized, and the N * phase liquid crystals with the properties of thermal chiral inversion were induced by adding nematic liquid crystals. The N * phase liquid crystal with controllable pitch can be prepared by adjusting the proportion of the chiral derivatives with the characteristics of thermal chiral flipping and the composition of the chiral and dextral compounds. (3) the selection of fluoride matrix and co-doping of Er3 / Nd3 to adjust the competition between energy levels and the competitive relationship between radiative and non-radiative transitions is proposed. The fluorescence spectra of fluoride oxide glass and fluoride oxide glass ceramics verify the upconversion and mid-infrared luminescence properties of rare earth ions and improve the mid-infrared luminescence properties of Er3 doped ceramics. (4) Polyaniline-carbon nanotubes, polystyrene-C60 and polythiophene C60 complexes were prepared by in situ polymerization and emulsion polymerization. 40ps pulse Z- scan experiments show that the four composite samples have strong nonlinear absorption and optical limiting properties. The optical limiting mechanism of fullerene C60 based composites is nonlinear reverse saturation absorption of single excited state, and the optical limiting mechanism of carbon nanotube based composites is nonlinear absorption and induced scattering. The interaction between conjugated systems is of great significance in enhancing nonlinear optical properties and optical limiting properties. The suspension was prepared from graphene and single-walled carbon nanotubes, and the pulse width laser limiter experiment was carried out for 532nmP1064nm / 10ns. The results show that the sample suspensions have wideband limiting performance to ns pulse lasers. The series optical limiter is fabricated by using SWNTs-NMP and G-CB with different limiting thresholds, respectively. The optical limiting performance of ultra-low threshold and high damage threshold is realized. The optical limiting of graphene and single-walled carbon nanotube suspensions is a mechanism of absorption induced scattering.
【学位授予单位】：北京科技大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TB34
本文编号：2306727
[Abstract]:Based on the application of functional materials in the field of optoelectronic protection, this paper explores the technical principles and implementation methods of new optoelectronic functional materials. On the one hand, based on Polyaniline and its derivatives, chiral nematic liquid crystal and rare earth ion co-doped fluorooxide glass, the controllable spectral properties of the film were studied. On the other hand, based on the conjugated materials such as fullerene C60, carbon nanotubes and graphene, the laser limiting technique based on nonlinear optical principle is studied. The main work and conclusions are as follows: (1) Electrochromic properties of Polyaniline and its derivatives thin films were prepared and studied by electrochemical polymerization and electrochemical doping polymerization. The experimental results show that the prepared Polyaniline films doped with sodium diphenylamine sulfonate have good electrochromic properties, such as uniform distribution, overall adhesion, fast response speed and good electrochromic properties. (2) six chiral 1,10-propanediol derivatives were synthesized, and the N * phase liquid crystals with the properties of thermal chiral inversion were induced by adding nematic liquid crystals. The N * phase liquid crystal with controllable pitch can be prepared by adjusting the proportion of the chiral derivatives with the characteristics of thermal chiral flipping and the composition of the chiral and dextral compounds. (3) the selection of fluoride matrix and co-doping of Er3 / Nd3 to adjust the competition between energy levels and the competitive relationship between radiative and non-radiative transitions is proposed. The fluorescence spectra of fluoride oxide glass and fluoride oxide glass ceramics verify the upconversion and mid-infrared luminescence properties of rare earth ions and improve the mid-infrared luminescence properties of Er3 doped ceramics. (4) Polyaniline-carbon nanotubes, polystyrene-C60 and polythiophene C60 complexes were prepared by in situ polymerization and emulsion polymerization. 40ps pulse Z- scan experiments show that the four composite samples have strong nonlinear absorption and optical limiting properties. The optical limiting mechanism of fullerene C60 based composites is nonlinear reverse saturation absorption of single excited state, and the optical limiting mechanism of carbon nanotube based composites is nonlinear absorption and induced scattering. The interaction between conjugated systems is of great significance in enhancing nonlinear optical properties and optical limiting properties. The suspension was prepared from graphene and single-walled carbon nanotubes, and the pulse width laser limiter experiment was carried out for 532nmP1064nm / 10ns. The results show that the sample suspensions have wideband limiting performance to ns pulse lasers. The series optical limiter is fabricated by using SWNTs-NMP and G-CB with different limiting thresholds, respectively. The optical limiting performance of ultra-low threshold and high damage threshold is realized. The optical limiting of graphene and single-walled carbon nanotube suspensions is a mechanism of absorption induced scattering.
【学位授予单位】：北京科技大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TB34
【参考文献】
相关期刊论文 前10条
1 奚利飞,郑俊萍,张红磊,杨学稳,姚康德;智能材料的研究现状及展望[J];材料导报;2003年S1期
2 浦鸿汀;刘玲;;有机三阶非线性光学材料的研究进展[J];材料导报;2007年02期
3 姜涛;余大斌;王自荣;施文;;自适应隐身材料的研究现状及发展趋势[J];材料导报;2008年S2期
4 王杨勇,井新利,强军锋;聚苯胺/碳纳米管的原位复合[J];复合材料学报;2004年03期
5 马利,汤琪;共聚态聚苯胺的合成及性能[J];高分子材料科学与工程;2003年06期
6 赵雄燕,周其庠,何元康,陈慧英;共轭型聚合物三阶非线性光学材料的研究进展[J];高分子通报;1998年02期
7 杨长胜,程海峰,李效东,唐耿平;智能隐身材料的研究现状[J];功能材料;2005年05期
8 高建荣，陈兴，程侣柏;有机低分子三阶非线性光学材料[J];功能材料;1996年05期
9 李文戈,朱昌中,王文芬,吴锦屏;可逆热致变色材料[J];功能材料;1997年04期
10 邱雪琼;吴惠霞;童睿;钱士雄;林阳辉;蔡瑞芳;;可溶性高聚物-多壁碳纳米管复合物的吸收光谱和光限幅性能研究[J];光谱学与光谱分析;2008年07期
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