INVESTIGADORES
MANFREDI Liliana Beatriz
congresos y reuniones científicas
Título:
Biocomposites obtaining with natural fillers and potato starch polymer
Autor/es:
J. I. MORÁN; L. B. MANFREDI; V. P. CYRAS; A. VÁZQUEZ
Lugar:
San Sebastián, España
Reunión:
Conferencia; V International Conference on Science and Technology of Composite Materials - 8° Congreso Nacional de Materiales Compuestos (COMATCOMP 2009); 2009
Resumen:
<!-- /* Font Definitions */ @font-face {font-family:Calibri; mso-font-alt:"Century Gothic"; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-1610611985 1073750139 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:ES-TRAD;} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} -->
<!--
/* Font Definitions */
@font-face
{font-family:Calibri;
mso-font-alt:"Century Gothic";
mso-font-charset:0;
mso-generic-font-family:swiss;
mso-font-pitch:variable;
mso-font-signature:-1610611985 1073750139 0 0 159 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{mso-style-parent:"";
margin:0cm;
margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.0pt;
font-family:"Times New Roman";
mso-fareast-font-family:"Times New Roman";
mso-ansi-language:ES-TRAD;}
@page Section1
{size:612.0pt 792.0pt;
margin:70.85pt 3.0cm 70.85pt 3.0cm;
mso-header-margin:36.0pt;
mso-footer-margin:36.0pt;
mso-paper-source:0;}
div.Section1
{page:Section1;}
-->
Starch is a
biodegradable polymer produced in abundance from many renewable resources. As a
consequence it is easily available and very cheap. However, it is necessary to
reduce their water absorption, as well as improve their mechanical
properties. Gelatinized potato starch in the presence
of water and glycerol was used as references material. In order to decrease their hydrophibicity
starch was acetylated (with acetic acid and anhydride), maleated (with maleic
anhydride) and esterified with octanoyl
chloride. Films were
prepared from potato starch and montmorillonite. The clay dispersion in the
films was analyzed by X-ray diffraction (XRD). It was observed that the 001
diffraction peak of clay was shift to lower angles in the nanocomposites
patterns providing strong evidence that the clay nanolayers formed an
intercalated structure but not complete exfoliation. The water absorbed by the
nanocomposites measured in an environment with a 75% of constant relative
humidity was reduced by the addition of montmorillonite to the starch. The
micro-tensile test was performed on the nanocomposite films showing significant
improvement in the Young modulus up to 500% for the nanocomposite containing 5
wt% of clay.