Preparation and characterization of polymer-dispersed liquid crystal (PDLC) with different cation exchange capacity (CEC) clays

2010 ◽  
Vol 71 (4) ◽  
pp. 595-599 ◽  
Author(s):  
Tsung-Yen Tsai ◽  
Chun-Yi Lee ◽  
Chen-Ju Lee ◽  
Wei-Chiang Chang ◽  
Wei Lee ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Polymer Dispersed Liquid Crystal ◽  
Polymer Dispersed

Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics

Clay Minerals ◽  
2019 ◽  
Vol 54 (4) ◽  
pp. 369-377 ◽  
Author(s):  
Maja Milošević ◽  
Predrag Dabić ◽  
Sabina Kovač ◽  
Lazar Kaluđerović ◽  
Mihovil Logar
Keyword(s):  
Specific Surface ◽  
Cation Exchange ◽  
Surface Area ◽  
Specific Surface Area ◽  
Cation Exchange Capacity ◽  
Mineralogical Composition ◽  
Exchange Capacity ◽  
Mineralogical Characterization ◽  
Mineralogical Study

AbstractThis study focuses on the mineralogical characterization of four raw clay samples from Dobrodo deposit, Serbia. Several analytical methods were applied to determine the chemical and mineralogical composition, morphology and physical properties (colour, plasticity, specific surface area, particle size and cation-exchange capacity) of the clay samples. Kaolinite, smectite and illite are the predominant phases in all of the samples studied that contain between 60.2 and 87.1 wt.% of clay. Quartz, feldspars, paragonite and Ti- and Fe-bearing phases were also identified. The relatively high SiO2/Al2O3 mass ratio indicates abundant quartz. The cation-exchange capacity of the samples varied between low and moderately charged clay minerals (12–52 mmol 100 g–1) with specific surface area values ranging from 94 to 410 m2 g–1. The plasticity index values (11–23%) suggest low to moderate plasticity. Preliminary results show that most of the raw clay from Dobrodo deposit might be suitable for use in ceramic applications.

High pump efficiency of a second-order distributed feedback laser based on holographic polymer dispersed liquid crystals with preferred liquid crystal molecular orientation

2018 ◽  
Vol 6 (35) ◽  
pp. 9517-9522 ◽  
Author(s):  
Lijuan Liu ◽  
Xiaobo Kong ◽  
Qidong Wang ◽  
Yonggang Liu ◽  
Li Xuan
Keyword(s):  
Liquid Crystal ◽  
Distributed Feedback ◽  
Pump Efficiency ◽  
Transmission Grating ◽  
Polymer Dispersed Liquid Crystal ◽  
Polymer Dispersed Liquid Crystals ◽  
Polymer Dispersed ◽  
High Pump ◽  
Organic Semiconductor Laser

We report on the fabrication and characterization of a surface-emitting distributed feedback (DFB) organic semiconductor laser based on a holographic polymer dispersed liquid crystal (HPDLC) transmission grating.

scholarly journals Zearalenone and ochratoxin A: adsorption by kaolin modified with surfactant

10.30544/413 ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 39-45
Author(s):  
Milica P. Spasojević ◽  
Aleksandra Dakovic ◽  
George E. Rottinghaus ◽  
Ana S. Radosavljević Mihajlović ◽  
Marija A. Marković ◽  
...  
Keyword(s):  
Cation Exchange ◽  
Ftir Spectroscopy ◽  
Ochratoxin A ◽  
Quartz Sand ◽  
Cation Exchange Capacity ◽  
Surface Adsorption ◽  
New Product ◽  
Exchange Capacity ◽  
Organic Cations

Octadecyldimethylbenzyl ammonium chloride (OA) was used as a surfactant for the preparation of organokaolin. The natural kaolin (from a plant for production of quartz sand in Rgotina, Serbia) was modified with a surfactant in amount equal to 90% of the kaolin cation exchange capacity (CEC). FTIR spectroscopy was used for characterization of the new product. FTIR spectra confirmed the presence of OA ions at the kaolin surface. Adsorption of mycotoxins – zearalenone (ZEN) and ochratoxin A (OCHRA) was studied by organokaolin at different amounts of adsorbent and pHs. Results showed that the presence of organic cations in the kaolin structure increased adsorption of both ZEN and OCHRA. Adsorption of the mycotoxins by organokaolin increased with increasing amounts of adsorbent and, at the lowest amount of solids in suspension, adsorption of ZEN and OCHRA was slightly higher at pH 7 and 9.

Characterization of holographic polymer dispersed liquid crystal transmission gratings

2001 ◽  
Vol 90 (8) ◽  
pp. 3831-3837 ◽  
Author(s):  
Mojca Jazbinšek ◽  
Irena Drevenšek Olenik ◽  
Marko Zgonik ◽  
Adam K. Fontecchio ◽  
Gregory P. Crawford
Keyword(s):  
Liquid Crystal ◽  
Polymer Dispersed Liquid Crystal ◽  
Polymer Dispersed
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