CARRA, M. A. S.

CORREA, D. S.

MALAFATTI, J. O. D.

MARCONCINI, J. M.

NEVES JUNIOR, L. F.

OLIVEIRA, C. R. de

PARIS, E. C.

SANTOS, L. C.

SCIENA, C. R.

English

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Biodegradable Sachets Composed byStarch:Pectin for Controlling/Slow Release ofPhosphorus Ions from HydroxyapatiteNanoparticlesCamila Rodrigues Sciena1,2, João Otávio Donizette Malafatti1, Luiz Ferrreira NevesJr.1, Matheus André Salles Carra1, Lílian Cruz Santos1, Daniel Souza Corrêa2, JoséManoel Marconcini2, Cauê Ribeiro Oliveira2, Elaine Cristina Paris21Universidade Federal de São Carlos - Campus: São Carlos, 2EmbrapaInstrumentação Agropecuária - São Carlose-mail: carsciena@gmail.comFirst of all, the application of materials that can decrease the lost and leaching ofactive  principles  employed  in  the  agribusiness  is  a  technic  which  can  savefinancial investuments in this area. So, decrease the process cost and protect thenature from these materials are essentialfactors for the ground protection andconservation.  Thus,  the  aim  of  the  present  work  is  the  evaluation  of  thehydroxyapatite (HAP) (Ca10(PO3)6(OH)2) as a source of phosphorus to the soil usingsachets  based  on  starch:  pectin  blends,  which  are  degradable  polymers  topackaging it. HAP synthesis was performed by wet coprecipitation followed byhydrothermal process. For that, ammonium phosphate dibasic was slowly droppedinto calcium nitrate aqueous solution under constant stirring and nitrogen flow,by the way urea was used to raise the pH. In face of that, the white suspensionformed was submitted to hydrothermal treatment at 36h for 150°C. The blendwas prepared using 75:25 (starch:pectin) ratio, and glycerol, water and stearicwere used as plasticizer agents. Then, the mixture was homogenized in a torquerheometer at 130°C for 4 minutes. After that, the thermoplastic polymer waspressed in a way to produce films. In its turn the sachet preparing occurred usingthe starch:pectin film blend in square form (2x2 cm) that had three sides sealed.Then, the fourth side was used to introduce the hydroxyapatite nanoparticles, sothe last one was closed. The materials characterizations were realized by X-RayDiffraction, Infrared Spectroscopy (FTIR), FT-Raman and Transmission ElectronMicroscopy (MET) and thermal gravimetric analysis (TGA). It was observed thatthe  produced  HAP  nanoparticles  was  pure  and  monophasic,  presenting  thewhiskers form.  Moreover, it was verified that the blend did not degrade at theprocess temperature.  The liberation of HAP nanopaticles varied from 0 to  1 ppmat neutral pH, and from 0 to 26 at pH 1.   244XIV Brazil MRS Meeting - Rio de Janeiro, from 27 September to 01 October, 2015

Biodegradable sachets composed by starch: pectin for controlling/slow release of phosphorus ions from hydroxyapatite nanoparticles.

http://www.alice.cnptia.embrapa.br/bitstream/doc/1036245/1/BiodegradableSachetsComposedbystarch.pdf

Biodegradable sachets composed by starch: pectin for controlling/slow release of phosphorus ions from hydroxyapatite nanoparticles.

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