Effect of shear flow on optical anisotropic film of chromonic liquid crystal
The effect of shear flow on an optical anisotropic film of chromonic liquid crystal by use of applicator was investigated. Some chromonic dyes form a rod like aggregation in an aqueous solution and change to a chromonic liquid crystal in a certain concentration and temperature of the solution. When...
| Main Authors: | , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2015-03-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/81/823/81_14-00616/_pdf/-char/en |
| _version_ | 1797988670170464256 |
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| author | Yumiko YOSHITAKE Tsutomu TAKAHASHI |
| author_facet | Yumiko YOSHITAKE Tsutomu TAKAHASHI |
| author_sort | Yumiko YOSHITAKE |
| collection | DOAJ |
| description | The effect of shear flow on an optical anisotropic film of chromonic liquid crystal by use of applicator was investigated. Some chromonic dyes form a rod like aggregation in an aqueous solution and change to a chromonic liquid crystal in a certain concentration and temperature of the solution. When the chromonic liquid crystal is applied to a glass substrate by an applicator, the aggregates in the chromonic liquid crystal are oriented in one direction in the thin film, and it exhibits an optical anisotropy such as birefringence and dicrhoism. The orientation process of the aggregates during application, however, is still unknown in detail. The application process, especially shear region, was considered to be important to make the optical anisotropy film having a uniform and high dichroism. The shear flow would have the multi-domain collapsed and transformed to mono-domain. In the present experiment, small texture disappeared when the chromonic liquid crystal under the shear flow was observed by microscope, however the optically measured dichroism and birefringence by the laser did not vary even though the shear rate changed widely. The birefringence is ten times larger at the exit of applicator, which is elongation region, than the one just under the applicator. The shear flow shows limited effectiveness against the molecular orientation. It would be the elongation flow that is more effective to produce a good optical anisotropic film. |
| first_indexed | 2024-04-11T08:06:42Z |
| format | Article |
| id | doaj.art-37d7176f70a945c2aabe1427342b8c44 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T08:06:42Z |
| publishDate | 2015-03-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-37d7176f70a945c2aabe1427342b8c442022-12-22T04:35:29ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612015-03-018182314-0061614-0061610.1299/transjsme.14-00616transjsmeEffect of shear flow on optical anisotropic film of chromonic liquid crystalYumiko YOSHITAKE0Tsutomu TAKAHASHI1Department of Mechanical Engineering, Nagaoka University of TechnologyDepartment of Mechanical Engineering, Nagaoka University of TechnologyThe effect of shear flow on an optical anisotropic film of chromonic liquid crystal by use of applicator was investigated. Some chromonic dyes form a rod like aggregation in an aqueous solution and change to a chromonic liquid crystal in a certain concentration and temperature of the solution. When the chromonic liquid crystal is applied to a glass substrate by an applicator, the aggregates in the chromonic liquid crystal are oriented in one direction in the thin film, and it exhibits an optical anisotropy such as birefringence and dicrhoism. The orientation process of the aggregates during application, however, is still unknown in detail. The application process, especially shear region, was considered to be important to make the optical anisotropy film having a uniform and high dichroism. The shear flow would have the multi-domain collapsed and transformed to mono-domain. In the present experiment, small texture disappeared when the chromonic liquid crystal under the shear flow was observed by microscope, however the optically measured dichroism and birefringence by the laser did not vary even though the shear rate changed widely. The birefringence is ten times larger at the exit of applicator, which is elongation region, than the one just under the applicator. The shear flow shows limited effectiveness against the molecular orientation. It would be the elongation flow that is more effective to produce a good optical anisotropic film.https://www.jstage.jst.go.jp/article/transjsme/81/823/81_14-00616/_pdf/-char/enapplicationchromonic liquid rystalpolarized filmshear flowoptical anisotropy |
| spellingShingle | Yumiko YOSHITAKE Tsutomu TAKAHASHI Effect of shear flow on optical anisotropic film of chromonic liquid crystal Nihon Kikai Gakkai ronbunshu application chromonic liquid rystal polarized film shear flow optical anisotropy |
| title | Effect of shear flow on optical anisotropic film of chromonic liquid crystal |
| title_full | Effect of shear flow on optical anisotropic film of chromonic liquid crystal |
| title_fullStr | Effect of shear flow on optical anisotropic film of chromonic liquid crystal |
| title_full_unstemmed | Effect of shear flow on optical anisotropic film of chromonic liquid crystal |
| title_short | Effect of shear flow on optical anisotropic film of chromonic liquid crystal |
| title_sort | effect of shear flow on optical anisotropic film of chromonic liquid crystal |
| topic | application chromonic liquid rystal polarized film shear flow optical anisotropy |
| url | https://www.jstage.jst.go.jp/article/transjsme/81/823/81_14-00616/_pdf/-char/en |
| work_keys_str_mv | AT yumikoyoshitake effectofshearflowonopticalanisotropicfilmofchromonicliquidcrystal AT tsutomutakahashi effectofshearflowonopticalanisotropicfilmofchromonicliquidcrystal |