Effect of nano particles on electro optic properties of polymer dispersed liquid crystal in normal mode

ADVANCES IN BASIC SCIENCE (ICABS 2019) Pub Date : 2019-08-29 DOI:10.1063/1.5122510

V. Sharma, Pankaj Kumar, Chinky, Ridhima Gahrotra, K. Raina, P. Malik

{"title":"Effect of nano particles on electro optic properties of polymer dispersed liquid crystal in normal mode","authors":"V. Sharma, Pankaj Kumar, Chinky, Ridhima Gahrotra, K. Raina, P. Malik","doi":"10.1063/1.5122510","DOIUrl":null,"url":null,"abstract":"Polymer dispersed liquid crystal (PDLC) is a striking material and have an enormous role in electro optic display devices. In this paper, nanoparticles (NPs) doped PDLCs in normal mode were prepared from a mixture of UV curable liquid polymer, nematic liquid crystal (LC) and silica NPs by the polymerization induced phase separation (PIPS) process. Morphological study shows the LC droplets cluster formation in pure PDLC and LC droplets with a more uniform phase separated polymer matrix in NPs doped PDLC due to the heterogeneous nucleation rate caused by the increased nucleation at the surface of NPs. Further, electro optic properties of doped and pure PDLC including transmittance, driving voltage, contrast ratio and sharpness as well as slope of the linear region of the transmittance-voltage were measured, compared and analyzed. Driving voltage of NPs doped PDLCs quite improved, however the slope of linear region and contrast ratio declined as compared to pure PDLC.Polymer dispersed liquid crystal (PDLC) is a striking material and have an enormous role in electro optic display devices. In this paper, nanoparticles (NPs) doped PDLCs in normal mode were prepared from a mixture of UV curable liquid polymer, nematic liquid crystal (LC) and silica NPs by the polymerization induced phase separation (PIPS) process. Morphological study shows the LC droplets cluster formation in pure PDLC and LC droplets with a more uniform phase separated polymer matrix in NPs doped PDLC due to the heterogeneous nucleation rate caused by the increased nucleation at the surface of NPs. Further, electro optic properties of doped and pure PDLC including transmittance, driving voltage, contrast ratio and sharpness as well as slope of the linear region of the transmittance-voltage were measured, compared and analyzed. Driving voltage of NPs doped PDLCs quite improved, however the slope of linear region and contrast ratio declined as compared to pure PDLC.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"94 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1063/1.5122510","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 4

Abstract

Polymer dispersed liquid crystal (PDLC) is a striking material and have an enormous role in electro optic display devices. In this paper, nanoparticles (NPs) doped PDLCs in normal mode were prepared from a mixture of UV curable liquid polymer, nematic liquid crystal (LC) and silica NPs by the polymerization induced phase separation (PIPS) process. Morphological study shows the LC droplets cluster formation in pure PDLC and LC droplets with a more uniform phase separated polymer matrix in NPs doped PDLC due to the heterogeneous nucleation rate caused by the increased nucleation at the surface of NPs. Further, electro optic properties of doped and pure PDLC including transmittance, driving voltage, contrast ratio and sharpness as well as slope of the linear region of the transmittance-voltage were measured, compared and analyzed. Driving voltage of NPs doped PDLCs quite improved, however the slope of linear region and contrast ratio declined as compared to pure PDLC.Polymer dispersed liquid crystal (PDLC) is a striking material and have an enormous role in electro optic display devices. In this paper, nanoparticles (NPs) doped PDLCs in normal mode were prepared from a mixture of UV curable liquid polymer, nematic liquid crystal (LC) and silica NPs by the polymerization induced phase separation (PIPS) process. Morphological study shows the LC droplets cluster formation in pure PDLC and LC droplets with a more uniform phase separated polymer matrix in NPs doped PDLC due to the heterogeneous nucleation rate caused by the increased nucleation at the surface of NPs. Further, electro optic properties of doped and pure PDLC including transmittance, driving voltage, contrast ratio and sharpness as well as slope of the linear region of the transmittance-voltage were measured, compared and analyzed. Driving voltage of NPs doped PDLCs quite improved, however the slope of linear region and contrast ratio declined as compared to pure PDLC.

查看原文本刊更多论文

纳米粒子对聚合物分散液晶正模电光性能的影响

聚合物分散液晶(PDLC)是一种引人注目的材料，在电光显示器件中发挥着巨大的作用。以紫外光固化的液态聚合物、向列相液晶(LC)和二氧化硅NPs为原料，采用聚合诱导相分离(PIPS)法制备了掺杂pdlc的纳米粒子(NPs)。形态学研究表明，由于NPs表面成核速率增加，LC液滴在纯PDLC中形成团簇，而在NPs掺杂的PDLC中，LC液滴具有更均匀的相分离聚合物基体。此外，对掺杂和纯PDLC的电光特性进行了测量、比较和分析，包括透射率、驱动电压、对比度和清晰度以及透射电压线性区域的斜率。与纯PDLC相比，NPs掺杂的PDLC驱动电压有较大提高，但线性区斜率和对比度下降。聚合物分散液晶(PDLC)是一种引人注目的材料，在电光显示器件中发挥着巨大的作用。以紫外光固化的液态聚合物、向列相液晶(LC)和二氧化硅NPs为原料，采用聚合诱导相分离(PIPS)法制备了掺杂pdlc的纳米粒子(NPs)。形态学研究表明，由于NPs表面成核速率增加，LC液滴在纯PDLC中形成团簇，而在NPs掺杂的PDLC中，LC液滴具有更均匀的相分离聚合物基体。此外，对掺杂和纯PDLC的电光特性进行了测量、比较和分析，包括透射率、驱动电压、对比度和清晰度以及透射电压线性区域的斜率。与纯PDLC相比，NPs掺杂的PDLC驱动电压有较大提高，但线性区斜率和对比度下降。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

ADVANCES IN BASIC SCIENCE (ICABS 2019)

自引率

0.00%

发文量