Preparation, Determination And Applications Of Polyiodide Bactericides

Iodine bactericide is an innocuous high-effect germicide. Polyiodide is a new iodine bactericide which has better sterilizing effect. But the application of the polyiodide has not been expanded broadly because of the high cost and complicated preparation technology. So the study on the new technology of producing polyiodide is becoming more and more common in the disinfecting field. And meanwhile, polyiodide has important applications in the field of conducting material. Therefore the project is worthy of exploration.At first, different polyiodides were synthesized by the solid phase process, the complexation process and the resinifying process. In solid phase process, the polyiodides, which include triiodide, pentaiodide, heptaiodide, nonaiodide and undecaiodide tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide and tetramethyl ammonium iodide poly-compounds, were synthesized by the low-heat solid phase reaction between iodine and tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide or tetramethyl ammonium iodide; In complexation process, solution polyiodides were synthesized by complexing action of different agents; In resinifying process, triiodide, pentaiodide, heptaiodide resinic polyiodides were synthesized by ion-exchange when the strong basicity styrene anion exchange resin, potassium iodide and iodine were used as raw materials.And then, the physical properties and liquid state electric conductivity of solid polyiodide series were tested. Solid tetra-n-butyl ammonium polyiodides and solution polyiodides were analyzed with ultraviolet visible spectrum; and the tetra-n-butyl ammonium polyiodides were analyzed with Raman spectrum to get the structure of triiodide, pentaiodide, heptaiodide, nonaiodide, undecaiodide anion polyiodides; and the sterilizing effects of solid polyiodides and resinic polyiodides were tested through sterilizing experiment.The following conclusions have been gotten from a large amount of experiments and determinations:Triiodide, pentaiodide, heptaiodide, nonaiodide, undecaiodide of solid tetra-n-butyl ammonium polyiodides and tetrabutyl ammonium bromide polyiodides can be synthesized by solid phase process which is a economic easy way, while it's not suitable for synthesizing solid tetramethyl ammonium polyiodides; Solution polyiodides of triiodide, pentaiodide can be synthesized through the complexation process, and TX-10 is a better complexing agent; Triiodide, pentaiodide, heptaiodide resinic polyiodides were synthesized by ion-exchange of resinifying process, and that is a viable easy way.About tetra-n-butyl ammonium polyiodides: triiodide and pentaiodide anions are the basic building blocks; heptaiodide anion and undecaiodide anion are composed by triiodide anion, and nonaiodide anion is composed by pentaiodide anion. Therefore the character of triiodide, heptaiodide and undecaiodide polyiodides is similar, and that of pentaiodide and nonaiodide polyiodides is similar.The electric conductivity of solid polyiodides increases largely as the aggrandizement of polyiodide anions'polymerization degree. The solid polyiodides have excellent sterilizing effects and the effect of tetra-n-butyl ammonium undecaiodide is the best of them, and the sterilizing effects increase as the aggrandizement of polyiodide anions' polymerization degree. The sterilizing effects of resinic polyiodides increase as the aggrandizement of polyiodide anions' polymerization degree, the heptaiodide resinic polyiodide has better sterilizing effects than the triiodide and pentaiodide.