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Synthesize And Properties Of Zirconium Glyphosate

Posted on:2009-01-11Degree:MasterType:Thesis
Country:ChinaCandidate:Y YuanFull Text:PDF
GTID:2121360245474761Subject:Applied Chemistry
Abstract/Summary:PDF Full Text Request
In this article, Zirconium Glyphosate (ZrGP) was synthesized via reaction of glyphosate and Zirconyl dichloride. ZrGP microcrystal with high crystallinity was prepared using HF method. The crystal structure was researched by powder X-ray diffraction data. The structure of ZrGP is similar as layeredα-Zirconium Phosphate (α-ZrP). The interlayer distance of ZrGP is 16.5(A|°). The glyphosate group at the interlayer arranged as double decks and head to head. The heat stability of ZrGP is well. The layered structure of ZrGP can not be destroyed below 400℃. ZrGP can be intercalated by ethylamine in ethylamine vapor and the interlayer distance decreased to 10(A|°). The ethylamine molecule can escape from the interlayer and the interlayer distance is recovered. ZrGP can be exfoliated in ethylamine solution to form colloid. If the solvent was vaporized, layered structure can be restored as well as ZrGP intercalated by ethylamine in ethylamine vapor.ZrGP which prepared without using HF shrank distinctly in volume when the wet samples were dried by ordinary drying. The surface area and pore volume are low. Changing drying methods to avoid volume shrank can improve surface area and pore volume of ZrGP. Supercritical drying was used to get high surface area (445m~2/g) and larger pore volume (5.32cm~3/g) ZrGP material. Mesoporous ZrGP material was prepared using freeze-drying. Spray-drying obtained ZrGP microsphere.Zirconium Phosphate-Glyphosate(ZrPGP) was synthesized using mixed phosphate and phosphonate. With the glyphosate/phosphate ratio increased, the interlayer distance of ZrPGP increased and the distributing of phosphate and glyphosate at interlayer was changed. The morphology of ZrPGP was changed form hexagonal to long sheet as the ratio of glyphosate/phosphate increased. At especial ratio, spheral ZrPGP crystal was prepared.Because glyphosate can be esterified , esterified ZrGP can be synthesized. The interlayer distance of esterified ZrGP increased with the length of esterified glyphosate molecule increased. The growth and reunite morphology of esterified ZrGP can be influenced by the alcohol/water interfacial effect.
Keywords/Search Tags:Zirconium Glyphosate, drying methods, Zirconium Phosphate-Glyphosate, esterified ZrGP
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