Preparation and characterization of thermoplastic starch/zein blends
Blends of starch and zein plasticized with glycerol were prepared by melting processing in an intensive batch mixer connected to a torque rheometer at 160 °C. The resulting mixtures were compression molded and then characterized by scanning electron microscopy, differential scanning calorime...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2007-09-01
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| Series: | Materials Research |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392007000300002 |
| _version_ | 1818873340535767040 |
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| author | Elisângela Corradini Antonio José Felix de Carvalho Antonio Aprigio da Silva Curvelo José Augusto Marcondes Agnelli Luiz Henrique Capparelli Mattoso |
| author_facet | Elisângela Corradini Antonio José Felix de Carvalho Antonio Aprigio da Silva Curvelo José Augusto Marcondes Agnelli Luiz Henrique Capparelli Mattoso |
| author_sort | Elisângela Corradini |
| collection | DOAJ |
| description | Blends of starch and zein plasticized with glycerol were prepared by melting processing in an intensive batch mixer connected to a torque rheometer at 160 °C. The resulting mixtures were compression molded and then characterized by scanning electron microscopy, differential scanning calorimetry, wide-angle X ray diffraction and water-absorption experiments. The blends were immiscible, showing two distinct phases of starch and zein. The water uptake at equilibrium and its diffusion coefficient were determined. The water uptake at equilibrium decreased with increasing zein content. The diffusion coefficient fell sharply on addition of 20% zein and remained constant as zein content was increased. No appreciable effect of zein on starch crystallization was observed by X ray diffraction. The use of zein in thermoplastic starch compositions causes a decrease in the water sensitivity of these materials and lower its melt viscosity during processing making zein a suitable and very promising component in TPS compositions. |
| first_indexed | 2024-12-19T12:53:09Z |
| format | Article |
| id | doaj.art-848aee0fa0b94e289a45c2e9bda57c70 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-19T12:53:09Z |
| publishDate | 2007-09-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-848aee0fa0b94e289a45c2e9bda57c702022-12-21T20:20:28ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392007-09-0110322723110.1590/S1516-14392007000300002Preparation and characterization of thermoplastic starch/zein blendsElisângela CorradiniAntonio José Felix de CarvalhoAntonio Aprigio da Silva CurveloJosé Augusto Marcondes AgnelliLuiz Henrique Capparelli MattosoBlends of starch and zein plasticized with glycerol were prepared by melting processing in an intensive batch mixer connected to a torque rheometer at 160 °C. The resulting mixtures were compression molded and then characterized by scanning electron microscopy, differential scanning calorimetry, wide-angle X ray diffraction and water-absorption experiments. The blends were immiscible, showing two distinct phases of starch and zein. The water uptake at equilibrium and its diffusion coefficient were determined. The water uptake at equilibrium decreased with increasing zein content. The diffusion coefficient fell sharply on addition of 20% zein and remained constant as zein content was increased. No appreciable effect of zein on starch crystallization was observed by X ray diffraction. The use of zein in thermoplastic starch compositions causes a decrease in the water sensitivity of these materials and lower its melt viscosity during processing making zein a suitable and very promising component in TPS compositions.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392007000300002biodegradable polymersthermoplastic starchzeinpolymer blendsthermal properties |
| spellingShingle | Elisângela Corradini Antonio José Felix de Carvalho Antonio Aprigio da Silva Curvelo José Augusto Marcondes Agnelli Luiz Henrique Capparelli Mattoso Preparation and characterization of thermoplastic starch/zein blends Materials Research biodegradable polymers thermoplastic starch zein polymer blends thermal properties |
| title | Preparation and characterization of thermoplastic starch/zein blends |
| title_full | Preparation and characterization of thermoplastic starch/zein blends |
| title_fullStr | Preparation and characterization of thermoplastic starch/zein blends |
| title_full_unstemmed | Preparation and characterization of thermoplastic starch/zein blends |
| title_short | Preparation and characterization of thermoplastic starch/zein blends |
| title_sort | preparation and characterization of thermoplastic starch zein blends |
| topic | biodegradable polymers thermoplastic starch zein polymer blends thermal properties |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392007000300002 |
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