使用3种分子结构不同的单体材料体系制备了全息聚合物分散液晶光栅,对所制备光栅的形貌、衍射特性、驱动特性、单体双键转化率等进行了研究.研究结果表明:体系中单体材料结构刚性的增加有助于相分离结构的改善.由柔性单体制备的光栅样品,双键转化率低,光栅液晶区域液晶微滴尺寸小,驱动电压高;刚性适度的样品,其光栅液晶区域液晶微滴较大,衍射能力达到96%,实际衍射效率为82%,且曝光结束后单体的单体双键转化率达到了57%,驱动电压为8.3 V/μm;随着单体材料结构刚性的继续增加,光栅液晶微滴反而变小,液晶区域变窄,驱动电压升高.因此,合理增加单体的刚性程度有助于提高光栅相分离及光栅的电光特性.
参考文献
| [1] | Drzaic P S,Gonzales A M.Refractive index gradients and light scattering in polymer-dispersed liquid crystal films[J].Appl.Phys.Lett.,1993,62(12):1332-1334. |
| [2] | Aphonin O A,Panina Y U V,Pravdin A B,et al.Optical properties of stretched polymer dispersed liquid crystal Film[J].Liq.Crys.,1993,15(3):395-407. |
| [3] | Sutherland R L,Natarajan L V,Tondiglia V P,et al.Electrically switchable volume gratings in polymer-dispersed liquid crystals[J].Appl.Phys.Lett.,1994,64(9):1074-1076. |
| [4] | Crawford G P,Fiske T G,Silverstein L D.Reflective color LCDs based on H-PDLC and PSCT technologies[J].SID Digest Technol.Paper,1996,27:99-102. |
| [5] | Domash L H,Chen Y M,Gomatam B N,et al.Switchable-focus lenses in holographic polymer-dispersed liquid crystal[J].Proc.SPIE,1996,2689:188-194. |
| [6] | Sutherland R L,Natarajan L V,Tondiglia V P,et al.Switchable holograms for displays and telecommunications[J].Proc.SPIE,2001,4463:1-10. |
| [7] | Bunning T J,Natarajan L V,Tondiglia V P,et al.Holographic polymer-dispersed liquid crystals (H-PDLCs)[J].Annu.Rev.Mater.Sci.,2000,30:83-87. |
| [8] | Pogue R T,Natarajan L V,Tondiglia V P,et al.Controlling nanoscale morphology in switchable PDLC gratings[J].Proc.SPIE,1998,3475:2-11. |
| [9] | Lin J C,Taylor P L.Polymerization-induced phase separation of a liquid crystal-polymer mixture[J].Mol.Cryst.Liq.Cryst.,1993,237(13):25-31. |
| [10] | 阮圣平,彭增辉,于涛,等.全息液晶/聚合物光栅的制备[J].液晶与显示,2002,17(5):331-334. |
| [11] | 张斌,刘言军,贾瑜,等.全息聚合物弥散液晶材料衍射特性的优化[J].物理学报,2003,52(1):91-95. |
| [12] | 张斌,刘言军,徐克璹.全息聚合物弥散液晶器件电光特性的研究[J].物理学报,2004,53(06):1850-1856. |
| [13] | 宋静,郑致刚,刘永刚,等.含氟单体材料对全息聚合物分散液晶光栅电光特性的影响[J].液晶与显示,2006,21 (5):443-449. |
| [14] | 刘永刚,马骥,宋静,等.单体平均官能度对制备液晶/聚合物光栅的影响[J].液晶与显示,2005,20 (3):210-214. |
| [15] | Zheng Z,Song J,Liu Y,et al.Single-step exposure for two-dimensional electrically-tuneable diffraction grating based on polymer dispersed liquid crystal[J].Liq.Cryst.,2008,35(4):489-499. |
| [16] | Zheng Z,Ma J,Li W,et al.Improvements in morphological and electro-optical properties of polymer dispersed liquid crystal grating using a highly fluorine-substituted acrylate monomer[J].Liq.Cryst.,2008,35(7):885-893. |
| [17] | Wu B G,Erdmann J H,Doane J W.Response times and voltages for PDLC light shutters[J].Liq.Cryst.,1989,5(5):1453-1465. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%