Some Research About The PDLC And The Fluorescent Membrane For DO Detection

Since organic semiconductor was found in the 1950 s,scientists from all over the world create a variety of functional materials,including various compound that has the response of light,electricity,magnetism,etc,and it has been used in all walks of life,such as LCD,organic photo-voltaic materials,organic thin film transistor,organic photoconductor,etc.With the continuous application of various organic functional materials,the effect of organic functional materials is becoming more and more bigger.In this paper,based on liquid crystal materials,we make the polymer dispersed liquid crystal film for display by using the immobilization of polymer on liquid crystal molecules.By selecting suitable liquid crystal and polymer materials,the polymer dispersed liquid crystal film with perfect liquid crystal droplet distribution was prepared by controlling the ratio,curing condition and other factors influencing the electro-optical effect of polymer dispersed liquid crystal.The inhomogeneity of liquid crystal and polymer mixture in glass substrate was solved by experiments.In order to solve the problem of large driving voltage of polymer dispersed liquid crystal,the driving voltage of polymer dispersed liquid crystal membrane prepared in this paper only needs about 14 volts.In addition,we make a fluorescence membrane for the detection of dissolved oxygen water quality based on fluorescence materials,and we explore the application prospect of fluorescence sensing in the detection of dissolved oxygen water quality.In this paper,we choose a more excellent performance of oxygen sensitive Tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(ll)dichloride,through MTOS and TEOS copolymer formed membrane carrier,in the experiment,the fluorescent membrane has good uniformity,in this paper,we use the fluorescence spectrophotometer to measure fluorescence spectrum in different dissolved oxygen concentration of fluorescent membrane,and we find that with the increase of dissolved oxygen concentration,the fluorescence intensity is reduced,which prove the correction of Fluorescence quenching theory and by fitting,we find the dynamic range of the fluorescence film,and make the stern-volmer curve within the dynamic range of the fluorescence film to obtain the relationship between the fluorescence intensity of the fluorescence film and the concentration of dissolved oxygen,finally,we give some methods to improve the dynamic range of the fluorescence film.