scholarly journals Optimization of the Preparation of Aqueous Suspensions of Waxy Maize Starch Nanocrystals Using a Response Surface Methodology

2004 ◽  
Vol 5 (4) ◽  
pp. 1545-1551 ◽  
Author(s):  
Hélène Angellier ◽  
Luc Choisnard ◽  
Sonia Molina-Boisseau ◽  
Patrick Ozil ◽  
Alain Dufresne
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Maize Starch ◽  
Waxy Maize ◽  
Aqueous Suspensions ◽  
Starch Nanocrystals

scholarly journals Optimization of Sintering Process of Alumina Ceramics Using Response Surface Methodology

2021 ◽  
Vol 13 (12) ◽  
pp. 6739
Author(s):  
Darko Landek ◽  
Lidija Ćurković ◽  
Ivana Gabelica ◽  
Mihone Kerolli Mustafa ◽  
Irena Žmak
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Heating Rate ◽  
Sintering Temperature ◽  
Nonlinear Models ◽  
Slip Casting ◽  
Holding Time ◽  
Alumina Ceramics ◽  
Aqueous Suspensions ◽  
Temperature Heating

In this work, alumina (Al2O3) ceramics were prepared using an environmentally friendly slip casting method. To this end, highly concentrated (70 wt.%) aqueous suspensions of alumina (Al2O3) were prepared with different amounts of the ammonium salt of a polycarboxylic acid, Dolapix CE 64, as an electrosteric dispersant. The stability of highly concentrated Al2O3 aqueous suspensions was monitored by viscosity measurements. Green bodies (ceramics before sintering) were obtained by pouring the stable Al2O3 aqueous suspensions into dry porous plaster molds. The obtained Al2O3 ceramic green bodies were sintered in the electric furnace. Analysis of the effect of three sintering parameters (sintering temperature, heating rate and holding time) on the density of alumina ceramics was performed using the response surface methodology (RSM), based on experimental data obtained according to Box–Behnken experimental design, using the software Design-Expert. From the statistical analysis, linear and nonlinear models with added first-order interaction were developed for prediction and optimization of density-dependent variables: sintering temperature, heating rate and holding time.

Processing and Structural Properties of Waxy Maize Starch Nanocrystals Reinforced Natural Rubber

2005 ◽  
Vol 38 (9) ◽  
pp. 3783-3792 ◽  
Author(s):  
Hélène Angellier ◽  
Sonia Molina-Boisseau ◽  
Laurent Lebrun ◽  
Alain Dufresne
Keyword(s):  
Natural Rubber ◽  
Structural Properties ◽  
Maize Starch ◽  
Waxy Maize ◽  
Starch Nanocrystals

High-Strength Waterborne Polyurethane Reinforced with Waxy Maize Starch Nanocrystals

2008 ◽  
Vol 8 (11) ◽  
pp. 5831-5838 ◽  
Author(s):  
Yixiang Wang ◽  
Lina Zhang
Keyword(s):  
Electron Microscopy ◽  
High Strength ◽  
Waterborne Polyurethane ◽  
Nanocomposite Films ◽  
Strong Interactions ◽  
Equivalent Diameter ◽  
Maize Starch ◽  
Scanning Calorimetry ◽  
Waxy Maize ◽  
Starch Nanocrystals

High-strength elastic nanocomposite materials were successfully prepared from waxy maize starch nanocrystals as the reinforcing phase and waterborne polyurethane (WPU) as the matrix by casting and evaporating. Sulfuric acid hydrolysis of waxy maize starch granules yielded the crystalline platelets of the starch nanocrystals with an average equivalent diameter of 25–40 nm. The morphology, thermal behavior and mechanical properties of the nanocomposite films were investigated by means of transmission electron microscopy, wide-angle X-ray diffraction, scanning electron microscopy, ultraviolet-visible spectroscopy, thermogravimetric analysis, differential scanning calorimetry and tensile testing. The results revealed that the pre-dispersing process made a good effort on dispersing starch nanocrystals into the WPU matrix as small aggregates, and strong interactions occurred between filler and matrix, leading to the efficient strengthening of the composites. The films having 1 wt% starch nanocrystal, rested for one week in 75% RH, exhibited a significant increase from 0.6 to 3.2 MPa for Young's modulus and from 10.4 to 24.1 MPa for tensile strength. Interestingly, they showed high elongation at break, and remained basically in the range from 1148 to 1136%. Further, the WPU based composites possessed good thermal stability. This work provided a new environmentally friendly pathway to prepare WPU based elastomer with high strength.

Surface Chemical Modification of Waxy Maize Starch Nanocrystals

Langmuir ◽  
2005 ◽  
Vol 21 (6) ◽  
pp. 2425-2433 ◽  
Author(s):  
Hélène Angellier ◽  
Sonia Molina-Boisseau ◽  
Mohamed Naceur Belgacem ◽  
Alain Dufresne
Keyword(s):  
Chemical Modification ◽  
Surface Chemical ◽  
Maize Starch ◽  
Waxy Maize ◽  
Starch Nanocrystals ◽  
Surface Chemical Modification

Thermoplastic Starch−Waxy Maize Starch Nanocrystals Nanocomposites

2006 ◽  
Vol 7 (2) ◽  
pp. 531-539 ◽  
Author(s):  
Hélène Angellier ◽  
Sonia Molina-Boisseau ◽  
Patrice Dole ◽  
Alain Dufresne
Keyword(s):  
Thermoplastic Starch ◽  
Maize Starch ◽  
Waxy Maize ◽  
Starch Nanocrystals

The molecular structure of waxy maize starch nanocrystals

2009 ◽  
Vol 344 (12) ◽  
pp. 1558-1566 ◽  
Author(s):  
Hélène Angellier-Coussy ◽  
Jean-Luc Putaux ◽  
Sonia Molina-Boisseau ◽  
Alain Dufresne ◽  
Eric Bertoft ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Maize Starch ◽  
Waxy Maize ◽  
Starch Nanocrystals

Processing and Characterization of Waxy Maize Starch Films Plasticized by Sorbitol and Reinforced with Starch Nanocrystals

2007 ◽  
Vol 7 (11) ◽  
pp. 1206-1216 ◽  
Author(s):  
Jérémie Viguié ◽  
Sonia Molina-Boisseau ◽  
Alain Dufresne
Keyword(s):  
Maize Starch ◽  
Waxy Maize ◽  
Starch Films ◽  
Starch Nanocrystals
Sign in / Sign up

Export Citation Format

Share Document