Título: | PRODUCTION AND CHARACTERIZATION OF LOW DENSITY POLYETHYLENE FILMS REINFORCED WITH TIO2 BASED NANOMATERIALS | ||||||||||||||||||||||||||||||||||||||||
Autor: |
BRUNA MARIA DA CUNHA GOMES |
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Colaborador(es): |
SIDNEI PACIORNIK - Orientador PAULA MENDES JARDIM - Coorientador |
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Catalogação: | 18/JUN/2013 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||||||||||||||||||||||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=21691&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=21691&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.21691 | ||||||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||||||
Plastic materials are widely used in our daily lives in bags, food packaging
and other products and applications. This type of material is used because of
properties such as low-cost, easy processability, low density, resistance to water
and microorganisms, and chemical stability and durability. Due to the last two
properties, polymers show low biodegradability causing enviro nmental pollution.
As titanium dioxide (TiO2) has been shown to be an efficient photocatalyst, the
mixture of plastic with this material has been proven to be a new and useful way
to decompose solid polymers in open air. Trititanate nanotubes (TTNT) can also
be used as a route for developing TiO2-based nanomaterials with high
photocatalytic activity for degradation of gas pollutants. Thus, the present
research aims to produce degradable polyethylene polymer (PE) films composed
with four types of TiO2-based nanomaterials: TTNT as synthesized (A1), TTNT
with thermal post-treatment at 550 Celsius degrees (A5), TTNT with acid post-treatment (A11),
and, as a reference, commercial TiO2 nanoparticles from Degussa Company
(P25).The main characterization tool was the weight reduction measurement
during the degradation process. The films were exposed to artificial UV light
under ambient air for 350 hours. Virgin and degraded filmes where characterized
by X-ray Diffraction, UV-Vis absorption, Differential Scanning Calorimetry
(DSC), Thermogravimetric Analysis (TGA), and Scanning Electron Microscopy
(SEM). Films with post-treated TTNT showed stronger degradation than films
with non-treated loads, but weaker than films containing TiO2. This result was
partially assigned to the poor dispersion of the nanomaterials.
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