碩士 / 國立臺灣大學 / 材料科學與工程學研究所 / 87 / Some pesticides sometimes will lead to bad harvest , poor quality and even cause dangers to human and animals. To avoid this and reach protecting plant from worms , we try to utilize crystalline feature of montmorillonite and resistance of sodium alginate to produce a new type of presticides. In order to increas the amount of sodium alginate on the interlayer and surface on montmorillonite.. The experimient is disigned and processed to find the best condition of synthesizing complexes..
Firstly, we mix hexadecyltrimethylammonium(HDTMA) into montmorillonite to progress its characteristics. When the concentration of HDTMA is less than the charge exchange capacity(CEC) of montmorillonite,it was intercalated into layered aluminosilicate by ion exchange reaction. The basal spacing of the clay increased. As HDTMA in 1.5 times of the layer charge density, the basal spacing is largest. The HDTMA intercalation was confirmed by studying the 001 reflection of montmorillonite. The indentity period increased from 12.3A for sodium montmorillonite to 21.78A after intercalation of the HDTMA with 1.5 times of CEC. The dimensions of the HDTMA cation were computered, the HDTMA is intercalated with its three layers parallel to the layers of the host. Indeed, the difference (12.18A) between the identity period of collapsed sodium montmorillonite (9.6A) and the identity period along its symmetry plane ,i.e.4.0A. Alginic acid that the amount of intercalated and adsorbed by modified-clay is more than pure sodium montmorillonite. The results will be confirmed by the data of XRD, Rietveld method, FT-IR, UV/Vis, DTA, and TGA. The diffusion coefficient of alginic acid in the interlayer of the clay will be measured by cyclic voltammetry.
The viscosity of the solution is increasing at varying concentration of Alginic acid. The delivery of the durgs is influenced by the viscosity of the solution and the layer stuucture of montmorillonite.
| Identifer | oai:union.ndltd.org:TW/087NTU00159020 |
| Date | January 1999 |
| Creators | Bo-Husing Duh, 杜伯雄 |
| Contributors | Yuan-Haun Lee, 李源弘 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 91 |
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