{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T13:14:23Z","timestamp":1775049263953,"version":"3.50.1"},"reference-count":25,"publisher":"Polish Academy of Sciences Chancellery","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2006,1,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>In this work we have used acetoxypropylcellulose (APC) to produce free standing solid films (\u223c60 \u03bcm) that were used for assembling electro-optical devices. Thin films were obtained from concentrated lyotropic solutions of cellulose derivatives. Induced by the cast and shearing preparation conditions wrinkles and band textures can be observed in their free-surface plane. In order to eliminate and control these textures we used a process similar to that introducted in literature [1] which consists of storing the films in the same solvent-vapour atmosphere as the solution system. Lyotropic APC liquid crystalline solutions in dymethylacetamide (DMA) with crosslinker were prepared, thin films were obtained by using a shear\/casting technique and stored in the solvent-vapour atmosphere until a planar structure was achieved. The dried crosslinked films were analyzed by optical polarised microscopy (POM) and scanning electron microscopy (SEM). The films with different topographies were used to produce optical cells composed by the cellulose derivative film covered on both free surfaces by a layer of the nematic liquid crystal E7 and placed between two transparent conducting substrates. The electro-optical properties of these cells were obtained.<\/jats:p>","DOI":"10.2478\/s11772-006-0040-y","type":"journal-article","created":{"date-parts":[[2006,11,15]],"date-time":"2006-11-15T20:05:59Z","timestamp":1163621159000},"source":"Crossref","is-referenced-by-count":7,"title":["Tunable topographical cellulose matrices for electro-optical liquid crystal cells"],"prefix":"10.24425","volume":"14","author":[{"given":"I.","family":"Costa","sequence":"first","affiliation":[]},{"given":"P.","family":"Almeida","sequence":"additional","affiliation":[]},{"given":"D.","family":"Filip","sequence":"additional","affiliation":[]},{"given":"J.","family":"Figueirinhas","sequence":"additional","affiliation":[]},{"given":"M.","family":"Godinho","sequence":"additional","affiliation":[]}],"member":"37468","reference":[{"key":"40_CR1","doi-asserted-by":"crossref","first-page":"139","DOI":"10.1002\/app.1995.070550116","volume":"55","author":"S. Suto","year":"1995","unstructured":"S. Suto and K. Suzuki, \u201cCrosslinked hydroxypropyl cellulose films retaining cholesteric liquid crystalline order. I. Effects of cast conditions and heat treatment on the textures and order of films\u201d, J. Appl. Polymer Science 55, 139\u2013151 (1995).","journal-title":"J. Appl. Polymer Science"},{"key":"40_CR2","doi-asserted-by":"crossref","first-page":"277","DOI":"10.1016\/0144-8617(94)90053-1","volume":"25","author":"D.G. Gray","year":"1994","unstructured":"D.G. Gray, \u201cChiral nematic ordering of polysaccharides\u201d, Carbohydrate Polymers 25, 277\u2013284 (1994).","journal-title":"Carbohydrate Polymers"},{"key":"40_CR3","doi-asserted-by":"crossref","first-page":"529","DOI":"10.1002\/pat.364","volume":"14","author":"E. Bianchi","year":"2003","unstructured":"E. Bianchi, E. Marsano, P. Picasso, L. Matassini, and C. Costa, \u201cPolymeric liquid crystals: cholesteric superstructure from blends of hydroxypropylcellulose esters\u201d, Polymers for Advanced Technologies 14, 529\u2013536 (2003).","journal-title":"Polymers for Advanced Technologies"},{"key":"40_CR4","doi-asserted-by":"crossref","first-page":"1694","DOI":"10.1021\/ma00007a039","volume":"24","author":"J. Giasson","year":"1991","unstructured":"J. Giasson, J.F. Revol, D.G. Gray, and J. Stpierr, \u201cPreparation of chiral nematic gels by radiation cross-linking\u201d, Macromolecules 24, 1694\u20131696 (1991).","journal-title":"Macromolecules"},{"key":"40_CR5","doi-asserted-by":"crossref","first-page":"2050","DOI":"10.1002\/1521-3935(20001001)201:15<2050::AID-MACP2050>3.0.CO;2-I","volume":"201","author":"H. Hou","year":"2000","unstructured":"H. Hou, A. Reuning, J.H. Wendorff, and A. Greiner, \u201cTuning of the pitch height of thermotropic cellulose esters\u201d, Macromolecular Chemistry and Physics 201, 2050\u20132054 (2000).","journal-title":"Macromolecular Chemistry and Physics"},{"key":"40_CR6","doi-asserted-by":"crossref","first-page":"715","DOI":"10.1021\/ma50004a049","volume":"14","author":"S.L. Tseng","year":"1981","unstructured":"S.L. Tseng, A. Valente, and D.G. Gray, \u201cCholesteric liquid crystalline based on (acetoxypropyl)cellulose\u201d, Macromolecules 14, 715\u2013719 (1981).","journal-title":"Macromolecules"},{"key":"40_CR7","doi-asserted-by":"crossref","first-page":"1398","DOI":"10.1021\/ma970968o","volume":"31","author":"T. Sato","year":"1998","unstructured":"T. Sato, J. Nakamura, A. Teramoto, and M.M. Green, \u201cCholesteric pitch of lyotropic polymer liquid crystals\u201d, Macromolecules 31, 1398\u20131405 (1998).","journal-title":"Macromolecules"},{"key":"40_CR8","doi-asserted-by":"crossref","first-page":"29","DOI":"10.1080\/00268948308072026","volume":"99","author":"S.N. Bhadani","year":"1983","unstructured":"S.N. Bhadani and D.G. Gray, \u201cCellulose-based liquid crystalline polymers \u2014 esters of (hydroxypropyl)-cellulose\u201d, Molecular Crystals and Liquid Crystals 99, 29\u201338 (1983).","journal-title":"Molecular Crystals and Liquid Crystals"},{"key":"40_CR9","doi-asserted-by":"crossref","first-page":"1907","DOI":"10.1002\/polb.1994.090321108","volume":"32","author":"I. Rusig","year":"1994","unstructured":"I. Rusig, M.H. Godinho, L. Varichon, P. Sixou, J. Dedier, C. Filliatre, and A.F. Martins, \u201cOptical properties of cholesteric (2-hydroxypropyl)cellulose (HPC) esters\u201d, J. Polymer Science. 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Godinho, Polysaccharides Structural Diversity and Functional Versatility, New York, Marcel Dekker, 2004."},{"key":"40_CR17","doi-asserted-by":"crossref","first-page":"5932","DOI":"10.1021\/ma0118769","volume":"35","author":"M.H. Godinho","year":"2002","unstructured":"M.H. Godinho, J.G. Fonseca, A.C. Ribeiro, L.V. Melo, and P. Brogneira, \u201cAtomic force microscopy study of hydroxypropylcellulose films prepared from liquid crystalline aqueous solutions\u201d, Macromolecules 35, 5932\u20135936 (2002).","journal-title":"Macromolecules"},{"key":"40_CR18","doi-asserted-by":"crossref","first-page":"1491","DOI":"10.1080\/0267829021000034835","volume":"29","author":"P.J. Sebasti\u00e3o","year":"2002","unstructured":"P.J. Sebasti\u00e3o, C. Cruz, C. Pires, A. Ferraz, P. Brogueira, and M.H. 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