| Nanosized silica modified with carboxylic acid as support for controlled release of herbicides. | |
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MedLine Citation:
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PMID: 21728319 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Hexagonal mesoporous sílica modified with carboxylic acid (SiAc) has been obtained by reaction between chloroacetic acid and 3-aminopropyltrimetoxysilane, which was immobilized on porous by sol-gel process in the presence of n-dodecylamine template. SiAc was characterized by TG, FT-IR, 29Si-NMR, 13C-NMR, SEM, surface charge density, surface area and porous diameter, which proved that the carboxylic group was chemically bonded to an inorganic structure, and the material presented a nanometric structure with spheres < 50 nm and porous with 10 nm. Herbicides 2,4-D and picloram were anchored on SiAc porous gel to produce the materials named SiD and SiPi, respectively. The controlled release of picloram from the SiAc was less than 2,4-D. After 26 days of releasing, 4.43•10-5 mol L-1 of picloram were delivered by SiPi and 5.0•10-5 L-1 was released from the SiD in 30 days. |
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Authors:
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Alexandre Gustavo Soares Prado; Alecio R Nunes; Aline O Moura |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-7-5 |
Journal Detail:
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Title: Journal of agricultural and food chemistry Volume: - ISSN: 1520-5118 ISO Abbreviation: - Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-7-6 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0374755 Medline TA: J Agric Food Chem Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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