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Synthesis and Characterization of Layered Double Hydroxides as Bacteridides Delivery System and Surface Modification Nanohybirds

Author: YangHeng
Tutor: QuanZhenLan
School: Qingdao University of Science and Technology
Course: Physical and chemical
Keywords: Mg / Al layered double hydroxides (LDHs) Antiseptic Hexaconazole Micelle
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 33
Quote: 1
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Abstract


Layered double hydroxides (LDHs) are a class of a new type of inorganic material with a permanent positive charge , presence of exchangeable anions in the interlayer , the interlayer space adjustable drug molecules can be embedded in the interlayer to form a drug -LDHs nano heteroaryl compounds. LDHs are widely used in catalyst the antacid, wastewater treatment, anti-flocculants , the pharmaceutical carrier ( s ) , anion exchange agent , and a rheological modifier areas . Inclusions can not be ionized, a water-insoluble fungicide into the micelles of the anionic surfactant , respectively, by coprecipitation , the the structural reconstruction method and ion exchange method with a negatively charged micelles embedded into the LDHs layer , synthesis of the two kinds of the fungicide triadimenol hexaconazole alcohol and the LDHs hybrids. By powder X-ray diffraction (PXRD ) , transmission electron microscopy (TEM) and Fourier transform infrared (FT-IR) spectroscopy to characterize the fungicide -LDHs nanohybrid . By X -ray diffraction pattern shows the layer spacing of the fungicide -LDHs than pure -LDHs layer spacing increases markedly, and the 003 peak moving to lower 2θ values ??, indicating that the negatively charged micelles channel original anionic substituent . IR spectra proved the presence of fungicide -LDHs fungicides , the successful synthesis of the fungicide - LDHs UV - visible spectrophotometer (UV-Vis) detection fungicide -LDHs sustained release properties , fungicides - the LDHs hybrids is a potential drug delivery system . CO3-LDHs , and citric acid , naphthylacetic acid , 1 - hydroxy-cyclohexyl acetone solution of the reaction of the formic acid , and subjected to surface modification . Product by powder X- ray diffraction , Fourier transform infrared spectroscopy and transmission electron microscopy characterization . The PXRD spectrum shows CO3-LDHs modified layer spacing does not increase the absorption peaks characteristic groups to modifier can be observed in the infrared spectrum . TEM images of CO3-LDHs modification did not change before and after the particle size , CO3-LDHs modified lamellar connected together , the connections on its surface modifier , prove successful preparation of the surface modification of CO3 - LDHs .

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