Estou realizando uma pesquisa com a utilização de tanino em combinação de octaborato de sódio para o tratamento de bambu para fins estruturais. Como parte do processo, gostaria de pesquisar uma rota de tratamento que favorecesse a auto-condensação do tanino e, consequentemente, ajudar na fixação de boro na microestrutura do bambu.
Bom dia caro Christian, eu vi alguns trabalhos utilizando hexamina como agente de reticulação do tanino na madeira (6,0% em peso), no trabalho de Tondi et al2012, intitulado Tannin-boron preservatives for wood buildings: mechanical and fire properties.
Te mando o link do trabalho: http://link.springer.com/article/10.1007/s00107-012-0603-1.
Tenho diversas referencias com o uso de tanino no tratamento da madeira, caso tenha interesse, meu email é [email protected].
Atenciosaemente,
Patrícia
Dear all,
I excuse myself not to write in portuguese but I understand it quite well. There is a lot of work too on the self-condensation (autocondensation) of the tannin (Tondi has been my student) a lot more in depth. Equally for the reaction with hexamine (I do not quote them here as they would be too many).
The papers to look for are the following:
1. R.GARCIA and A.PIZZI, Polycondensation and autocondensation networks in polyflavonoid tannins, Part 1: final networks, J.Appl.Polymer Sci., 70(6), 1083-1091 (1998)
2. R.GARCIA and A.PIZZI, Polycondensation and autocondensation networks in polyflavonoid tannins, Part 2: polycondensation vs. autocondensation, J.Appl.Polymer Sci., 70(6), 1093-1110 (1998)
3. R.GARCIA, A.PIZZI, A.MERLIN, Ionic polycondensation effects on the radical autocondensation of polyflavonoid tannins-An ESR study, J.Appl.Polymer Sci., 65, 2623-2632 (1997)
4. E.MASSON, A.PIZZI, A.MERLIN, Comparative kinetics of the induced radical autocondensation of polyflavonoid tannins - Part 2: Flavonoid units effects, J.Appl.Polymer Sci., 64, 243-265 (1997)
5. E.MASSON, A.MERLIN and A.PIZZI, Comparative kinetics of the induced radical autocondensation of polyflavonoid tannins, Part I: modified and non-modified tannins, J.Appl.Polymer Sci., 60: 263-269 (1996)
6. E.MASSON, A.PIZZI and A.MERLIN, Comparative kinetics of the induced radical autocondensation of polyflavonoid tannins, Part III: micellar reactions vs; cellulose surface catalysis, J.Appl.Polymer Sci., 60: 1655-1664 (1996)
7. A.PIZZI, N.MEIKLEHAM, B.DOMBO and W.ROLL, Autocondensation-based, zero-emission, tannin adhesives for particleboard, Holz Roh Werkstoff, 53: 201-204 (1995)
8. F.PICHELIN, M.NAKATANI, A.PIZZI, S.WIELAND, A.DESPRES, S.RIGOLET, Structural beams from Thick wood panels bonded industrially with formaldehyde free tannin adhesives, Forest Prod.J., 56(5): 31-36 (2006)
9. G.TONDI, S.WIELAND, N.LEMENAGER, A.PETUTSCHNIGG, A.PIZZI, M.-F.THEVENON, Efficacy of tannin in fixing boron in wood: fungal and termite resistance, Bioresources, 7(1): 1238-1252 (2012)
10. M.-F.THEVENON, G.TONDI, A.PIZZI, High performance tannin resin-Boron wood preservatives for outdoor end-uses, Holz Roh Werkstoff, 67: 89-93 (2009)
Let me know if you need some of these. Please note: through Research Gate I can only send one at the time. If you want several please rather contact me directly by e-mail at
Best regards
A.Pizzi
Dear Professor Pizzi, Thank you for information, it is always good to be in contact with research and researchers from around the world. Best regards
Prezada Patricia,
Muito obrigado pelas informações! Eu li alguns artigos com o uso da hexamina. Gostaria dos outros artigos que você comentou. Estou justamente buscado pesquisas de tratamento de madeira para aplicar no bambu. Vou te mandar um e-mail ok?
Desde já agradeço a atenção.
Atenciosamente, Christian
Dear Prof. Pizzi,
Thank you very much for the articles you recommended and for your comments. I already have some of these papers but I do not have access to all. I will send you an e-mail regarding this subject ok?
Thank you in advance!
Best Regards,
Christian
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