Effect of oleic purity on the chemical structure, thermal and rheological properties of bio-based polymers derived from high oleic cottonseed oil via RAFT polymerization

The pressed oil-extraction process is essentially a process of oil seepage through porous cake-shaped media. Permeability of seepage field changes along with the change of porous media caused by press pressure. The change of permeability affects fluid pressure and effective pressure of oil cake pores, which means that porosity is influenced. On the contrary, the change of porosity also has an impact on permeability. The interaction between the seepage and rheology fields is termed as fluid-solid coupling. If rheology of oil cakes is considered, the fluid-solid coupling seepage with the rheological properties is the essence of the pressed oil-extraction process. In the present study, we studied a permeability model based on the deformable and rheological properties of oilseed cakes and the effective stress. The seepage and rheology fields were analyzed by alternative application of the finite difference and finite element methods. The finite element calculation model of nonlinear rheology field was established by the time step-initial strain method. We used flax and cotton seeds as examples to perform numerical simulation and calculate the displacement and pore fluid pressure dissipation of flaxseed and cottonseed oil during the press process.

Download Full-text

Relationship between Structure and Rheology of Hydrogels for Various Applications

Gels ◽

10.3390/gels7040255 ◽

2021 ◽

Vol 7 (4) ◽

pp. 255

Author(s):

Gorjan Stojkov ◽

Zafarjon Niyazov ◽

Francesco Picchioni ◽

Ranjita K. Bose

Keyword(s):

Rheological Properties ◽

Rheological Behavior ◽

Chemical Structure ◽

Industrial Applications ◽

Rheological Characteristics ◽

Frequency Sweep ◽

The Relationship

Hydrogels have gained a lot of attention with their widespread use in different industrial applications. The versatility in the synthesis and the nature of the precursor reactants allow for a varying range of hydrogels with different mechanical and rheological properties. Understanding of the rheological behavior and the relationship between the chemical structure and the resulting properties is crucial, and is the focus of this review. Specifically, we include detailed discussion on the correlation between the rheological characteristics of hydrogels and their possible applications. Different rheological tests such as time, temperature and frequency sweep, among others, are described and the results of those tests are reported. The most prevalent applications of hydrogels are also discussed.

Download Full-text

Naturally occurring high oleic acid cottonseed oil: identification and functional analysis of a mutant allele of Gossypium barbadense fatty acid desaturase-2

Planta ◽

10.1007/s00425-016-2633-0 ◽

2016 ◽

Vol 245 (3) ◽

pp. 611-622 ◽

Cited By ~ 7

Author(s):

Jay Shockey ◽

Michael Dowd ◽

Brian Mack ◽

Matthew Gilbert ◽

Brian Scheffler ◽

...

Keyword(s):

Functional Analysis ◽

Oleic Acid ◽

Fatty Acid ◽

Mutant Allele ◽

Fatty Acid Desaturase ◽

Cottonseed Oil ◽

High Oleic Acid ◽

High Oleic ◽

Naturally Occurring ◽

Fatty Acid Desaturase 2

Download Full-text

Chemical Structure and Rheological Properties of Tara Polysaccharide Gum

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.821-822.986 ◽

2013 ◽

Vol 821-822 ◽

pp. 986-989

Author(s):

Jin Ba ◽

Li Qiang Jin ◽

Wen Run Yao

Keyword(s):

Shear Rate ◽

Rheological Properties ◽

Chemical Structure ◽

Mass Ratio ◽

Gas Chromatograph ◽

Plant Polysaccharides ◽

Mechanical Process ◽

Composition And Structure ◽

Ft Ir ◽

Tree Seeds

Tara gum is a natural hydrocolloid obtained by a mechanical process from the endosperm of Tara tree seeds. In this study, chemical composition and structure of tara polysaccharide gum were characterized by fourier transform infrared spectroscopy (FT-IR) and gas chromatograph-mass spectrometer (GC-MS). Its rheological properties were also discussed. The results showed that tara gum had typical characteristics of plant polysaccharides, which was mainly consisted of galactose and mannose (mass ratio of galactose/mannose was 4.2:1), as well as a small amount of arabinose, glucose and xylose. The viscosity of tara gum solution was increased with the increase of its concentration. The tara gum solution demonstrated a higher viscocity at the shear rate lower than 80 Hz, but a higher elasticity at the shear rate higher than 80 Hz.

Download Full-text

Yellow mustard mucilage: chemical structure and rheological properties

Food Hydrocolloids ◽

10.1016/s0268-005x(09)80333-0 ◽

1994 ◽

Vol 8 (3-4) ◽

pp. 203-214 ◽

Cited By ~ 6

Author(s):

W. Cui ◽

N.A.M. Eskin ◽

C.G. Biliaderis

Keyword(s):

Rheological Properties ◽

Chemical Structure ◽

Yellow Mustard

Download Full-text