Título: | ANALYSIS OF A BIOPOLYMER FOR DEVELOPMENT OF A TOOTHBRUSH | ||||||||||||||||||||||||||||||||||||||||
Autor: |
PATRICIA BORBA WERNER |
||||||||||||||||||||||||||||||||||||||||
Colaborador(es): |
JOSE ROBERTO MORAES D ALMEIDA - Orientador |
||||||||||||||||||||||||||||||||||||||||
Catalogação: | 04/MAR/2010 | Língua(s): | PORTUGUESE - BRAZIL |
||||||||||||||||||||||||||||||||||||||
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. |
||||||||||||||||||||||||||||||||||||||||
Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=15334&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=15334&idi=2 |
||||||||||||||||||||||||||||||||||||||||
DOI: | https://doi.org/10.17771/PUCRio.acad.15334 | ||||||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||||||
Indiscriminate use of raw materials by various industries such as polymers
from petroleum has been causing an ever-increasing accumulation of slow
biodegrading residue materials in sanitary pits. Many modern life utensils are
made out of conventional plastic that are estimated to take up to half a century to
decompose. In view of this situation, the study of polymers from renewable
sources, the biopolymers, is key in the search for alternatives that may decrease
the damaging effects on the environment. Petroleum based polymers can in many
instances be replaced by biopolymers. Amongst such products, research has been
indicating that toothbrush manufacturing can make use of alternative materials. A
toothbrush is a personal hygiene device that should be used for relatively short
periods. It is commonly made out of polypropylene (PP), a polymer with slow
biodegrading characteristics. This study uses a multidisciplinary approach and its
objective is the development of a toothbrush handle made out of polyurethane
derived from castor oil. Water and artificial saliva absorption, DMTA and traction
experiments were carried out to compare chemical and mechanical properties of
traditional polypropylene and castor oil polyurethane toothbrushes. From the tests
we can conclude that the derivative of castor oil PU showed absorption of saliva
superior to water and also superior to PP. With respect to traction, the PP over the
PU in all aspects and is a material more resistant and more rigid. However, it was
concluded that with some changes in design, a brush made of PU derivative of
castor oil might reach the same tensile strength and structural rigidity of a
conventional toothbrush.
|
|||||||||||||||||||||||||||||||||||||||||
|