Plasticizers for Zein: Their Effect on Tensile Properties and
The changes seen in tensile properties with increasing RH are because of zein's hygroscopic nature. The absorbed water will further plasticize the zein. The type of plasticizer used...
Plasticizers for Zein: Their Effect on Tensile Properties and
The changes seen in tensile properties with increasing RH are because of zein's hygroscopic nature. The absorbed water will further plasticize the zein. The type of plasticizer used determined the extent of the changes seen in the tensile properties of films stored at different RH values.
Plasticizers for zein: Their effect on tensile properties and
Plasticizers for zein: Their effect on tensile properties and water absorption of zein films J. Lawton Published 2004 Chemistry Cereal Chemistry ABSTRACT Cast zein films are brittle at room conditions, so plasticizers are added to make them more flexible.
Physicochemical properties of zein films cross-linked with
To improve the mechanical properties of zein films, glycerol (GLY) and glutaraldehyde (GDA) were, respectively, selected as plasticizer and cross-linking agent to fabricate modified zein films by casting method. It was generally believed that the tensile strength (TS) of the modified film was improved with more GDA content. However, there was an interesting phenomenon that above 1 wt% GDA
Effect of zein subunit and plasticizer on rheology and
Under the lubricative effect of plasticizer, the mobility of zein molecules increased, and amorphous zein powder ( Fu et al., 2018) underwent glass transition from solid particles state to sticky and flowing state, so as to form zein-plasticizer adhesive ( Fig. 2 ).
- Can plasticizers replace water to prepare Zein network?
- Plasticizers that have strong plasticizing effects should be considered to replace water to prepare zein network since it can effectively reduce the Tg of zein ( Berta, Gmoser, Krona, & Stading, 2015 ), which has great potential to break the temperature limitation.
- What is the plasticizing capacity of acetic acid on zein?
- The plasticizing capacity of acetic acid (AcOH) on zein is stronger than that of water, and it could not only facilitate total-zein to form network, but also make the network structure more ordered and uniform ( King et al., 2016; Oguntoyinbo, Taylor, & Janet, 2018; Sly et al., 2014 ).
- What is the relationship between Zein network and plasticizer?
- The α-zein-AcOH network had the largest adhesiveness value, and α-zein-EtOH network had the smallest, which indicated that the adhesiveness of the network might closely related to the plasticizer. AcOH with stronger plasticization effect could cause zein network softer and more adhesive.
- Is Zein polymerized?
- In addition, polymerization of zein should be considered. Oom et al. (2008) and Schober et al. (2010) both reported that in the temperature sweeps, the increase of G′ of zein network may be caused by the heat-induced polymerization of zein.
- Can co-proteins improve the viscoelasticity of Zein-starch based dough?
- Adding co-protein such as casein could increase β-sheet structures of zein network system, thus improving the viscoelasticity of zein-starch based dough (Mejia et al., 2012, 2007 and; Erickson et al., 2014 ).
- Is polymerization of Zein in T-Zein-AcOH network covalent?
- Polymerization of zein in T-zein-AcOH network, compared with α-zein-AcOH network and α-zein-EtOH network, may not only contain non-covalent interactions but also covalent cross-linking ( Madeka & Kokini, 1996 ).
