Thermoplastic starch modified with microfibrillated cellulose and natural rubber latex: A broadband dielectric spectroscopy study

被引：36
作者：
Drakopoulos, S. X. [1 ]
Karger-Kocsis, J. [2 ,3 ]
Kmetty, A. [2 ,3 ]
Lendvai, L. [2 ]
Psarras, G. C. [1 ]
机构：
[1] Univ Patras, Dept Mat Sci, Patras 26504, Greece
[2] Budapest Univ Technol & Econ, Fac Mech Engn, Dept Polymer Engn, Muegyet Rkp 3, H-1111 Budapest, Hungary
[3] MTA BME Res Grp Composite Sci & Technol, Muegyet Rkp 3, H-1111 Budapest, Hungary
来源：
CARBOHYDRATE POLYMERS | 2017年 / 157卷
基金：
匈牙利科学研究基金会;
关键词：
Thermoplastic starch; Microfibrillar cellulose; Natural rubber latex; Broadband dielectric spectroscopy; Water effect; NANOCOMPOSITES; COMPOSITES; RELAXATION;
D O I：
10.1016/j.carbpol.2016.10.036
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Thermoplastic starch (TPS) biocomposites modified with cellulose microfibers and/or natural rubber were prepared via extrusion compounding. Glycerol and water served as plasticizers for starch. The dielectric properties of the TPS composites were examined via broadband dielectric spectroscopy in the temperature and frequency ranges of 30 degrees C-65 degrees C and 0.1 Hz-10 MHz, respectively. Each specimen was tested twice in order to study the effect of absorbed water. The hydrophobic/hydrophilic character of the modifiers governed the dielectric performance of the corresponding TPS biocomposites. Conducted analysis revealed two relaxation processes attributed to matrix-water-reinforcement interfacial polarization and glass to rubber transition of the TPS. Evaporation of water significantly affected the first process and only slightly the second one. Energy density, prior and after water evaporation, was also determined at constant field. By employing dielectric reinforcing function the contributions of water-assisted and constituents' originated interfacial phenomena could be separated. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：711 / 718
页数：8
相关论文
共 34 条
[1]   Experimental study on dielectric relaxation in alfa fiber reinforced epoxy composites [J].
Arous, M. ;
Ben Amor, I. ;
Boufi, S. ;
Kallel, A. .
JOURNAL OF APPLIED POLYMER SCIENCE, 2007, 106 (06) :3631-3640
[2]   Polyhydroxyalkanoate (PHA): Review of synthesis, characteristics, processing and potential applications in packaging [J].
Bugnicourt, E. ;
Cinelli, P. ;
Lazzeri, A. ;
Alvarez, V. .
EXPRESS POLYMER LETTERS, 2014, 8 (11) :791-808
[3]   Thermoplastic starch-clay nanocomposites and their characteristics [J].
Chen, BQ ;
Evans, JRG .
CARBOHYDRATE POLYMERS, 2005, 61 (04) :455-463
[4]   Preparation and properties of biodegradable starch-clay nanocomposites [J].
Chung, Yi-Lin ;
Ansari, Seema ;
Estevez, Luis ;
Hayrapetyan, Suren ;
Giannelis, Emmanuel P. ;
Lai, Hsi-Mei .
CARBOHYDRATE POLYMERS, 2010, 79 (02) :391-396
[5]   Preparation and characterization of melt-extruded thermoplastic starch/clay nanocomposites [J].
Dean, Katherine ;
Yu, Long ;
Wu, Dong Yang .
COMPOSITES SCIENCE AND TECHNOLOGY, 2007, 67 (3-4) :413-421
[6]   Polyurethane latex/water dispersible boehmite alumina nanocomposites:: Thermal, mechanical and dielectrical properties [J].
Gatos, K. G. ;
Alcazar, J. G. Martinez ;
Psarras, G. C. ;
Thomann, R. ;
Karger-Kocsis, J. .
COMPOSITES SCIENCE AND TECHNOLOGY, 2007, 67 (02) :157-167
[7]   Natural Rubber Latex Used as Drug Delivery System in Guided Bone Regeneration (GBR) [J].
Herculano, Rondinelli Donizetti ;
Silva, Cecilia Pereira ;
Ereno, Cibele ;
Catanzaro Guimaraes, Sergio Augusto ;
Kinoshita, Angela ;
de Oliveira Graeff, Carlos Frederico .
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, 2009, 12 (02) :253-256
[8]   Dielectric and functional properties of polymer matrix/ZnO/BaTiO3 hybrid composites [J].
Ioannou, G. ;
Patsidis, A. ;
Psarras, G. C. .
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 2011, 42 (01) :104-110
[9]   Development of novel antibacterial active, HaCaT biocompatible and biodegradable CA-g-P(3HB)-EC biocomposites with caffeic acid as a functional entity [J].
Iqbal, H. M. N. ;
Kyazze, G. ;
Locke, I. C. ;
Tron, T. ;
Keshavarz, T. .
EXPRESS POLYMER LETTERS, 2015, 9 (09) :764-772
[10]   Nanotechnology and its applications in lignocellulosic composites, a mini review [J].
Kamel, S. .
EXPRESS POLYMER LETTERS, 2007, 1 (09) :546-575
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