Detalhes bibliográficos
| Ano de defesa: |
2019 |
| Autor(a) principal: |
Horn, Martha Beatriz
 |
| Orientador(a): |
Pires, Marçal José Rodrigues
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| Banca de defesa: |
Não Informado pela instituição |
| Tipo de documento: |
Tese
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| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Pontifícia Universidade Católica do Rio Grande do Sul
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| Programa de Pós-Graduação: |
Programa de Pós-Graduação em Engenharia e Tecnologia de Materiais
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| Departamento: |
Escola Politécnica
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| País: |
Brasil
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| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://tede2.pucrs.br/tede2/handle/tede/9000
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Resumo: |
The present work aims the development of biopesticide based on biodegradable nanoencapsulation Neem oil for the control of the Tetranychus urticae mite. Initially oil characterization was performed using HPLC-DAD, LC-MSMS, GCMS and TGA techniques. Nanosuspensions were then prepared with poly lactic acid (PLA) or poly Ɛ-caprolactan in order to improve the thermal and photochemical protection of the active ingredient Azadiractin and to control its release. The characterization of nanosuspensions were made by DLS, MET, HPLC-DAD and pH with results indicating nanocapsule sizes between 215 and 289 nm, polydispersity index from 0.13 to 0.25 and encapsulation efficiency greater than 93%. It should be noted, better performance of PLA compared to PCL, as well as solvent evaporation by rotation and evaporation. Both the oil and the nanosuspensions evaluated showed excellent biopesticide action both in relation to mortality and reduction of mite oviposition, highlighting the NC13Ra (PLA) sample as the most effective. These results suggest the possibility of using PLA as an alternative and competitive polymer matrix to PCL for Neem encapsulation of Neem for its use as a biopesticide. |
