Temperature dependence of the viscosity of highly starch-filled poly(hydroxy ester ether) biodegradable composites

Zhou, Genwen; Willett, J. L.; Carriere, C. J.

doi:10.1007/s003970000096

Cited by 24 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dependence of viscosity on temperature can be explained by the Arrhenius relation (eq ). According to the Arrhenius relation, viscosity and temperature have an inverse relationship where η is the apparent viscosity of the nanoemulsions (mPa·s), η o is a constant, T is the absolute temperature (K), E a is the activation energy (kJ/mol), and R is the gas constant (8.314 J/(mol·K)).…”

Section: Resultsmentioning

confidence: 99%

“…According to the Arrhenius relation, viscosity and temperature have an inverse relationship. 93 where η is the apparent viscosity of the nanoemulsions (mPa•s), η o is a constant, T is the absolute temperature (K), E a is the activation energy (kJ/mol), and R is the gas constant (8.314 J/ (mol•K)). With the rise in temperature the thermal energy of the system rises, which leads to an increase in vibration of the oil droplets and reduces the time period of contact with the neighboring molecules and intermolecular interactions that help them to travel faster in Brownian motion in the aqueous medium, thus making the nanoemulsions flow easily.…”

Section: Energy and Fuelsmentioning

confidence: 99%

See 1 more Smart Citation

Surfactant Stabilized Oil-in-Water Nanoemulsion: Stability, Interfacial Tension, and Rheology Study for Enhanced Oil Recovery Application

2018

View full text Add to dashboard Cite

Nanoemulsions are kinetically stable biphasic dispersion of two immiscible liquids typically stabilized by an emulsifier with droplet sizes in the range of 10–200 nm. Present work deals with the formulation and characterization of stable oil-in-water nanoemulsions using nonionic surfactant (Tween 40) and light mineral oil for their application in enhanced oil recovery. The stability study of the nanoemulsions formed by high energy and low energy method was accomplished by bottle testing method. The emulsions were characterized in terms of droplet size, morphology and inner structure, surface charge, interfacial tension, and rheology. Droplet sizes of 18–31 nm obtained by dynamic light scattering analysis and surface charge values above −35 mV obtained by ζ potential measurement prove the higher kinetic stability of the formed emulsions. Cryo-TEM micrographs reveal the surface morphology and inner structure of nanoemulsions. A miscibility test was performed to determine the dissolving ability of the nanoemulsions with crude oil. Measurement of interfacial tension (IFT) by pendant drop method shows a considerable reduction in IFT values with the increase of surfactant concentration and temperature, which is highly desirable for recovering trapped oil from the fine pores of the reservoirs. The viscosity of the nanoemulsions remains stable at a wide temperature (30–70 °C) range, denoting its thermal stability. The viscoelastic property of prepared nanoemulsions shows the increase of storage modulus (G′) and loss modulus (G″) with the increase in surfactant concentration and angular frequency (rad/s). Specific frequency (SF), the crossover point of G′ and G″, indicates the transition between elastic and viscous phases of nanoemulsions. A stable value of loss modulus after SF denotes better flowability of the emulsion. To test the efficiency of nanoemulsion in enhanced oil recovery, flooding experiment was performed by injection of a small pore volume of emulsion slug in a sand pack system, and an additional recovery of 28.94% was obtained after conventional water flooding.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Energy and Fuelsmentioning

confidence: 99%

Surfactant Stabilized Oil-in-Water Nanoemulsion: Stability, Interfacial Tension, and Rheology Study for Enhanced Oil Recovery Application

2018

View full text Add to dashboard Cite

show abstract

“…It has been reported 23 that the relationship between the apparent viscosity of a polymer solution and temperature satisfies the Arrhenius equation (eq 2):…”

Section: Effect Of Temperature On Polymer Viscosity the Flow Curves F...mentioning

confidence: 99%

Effects of Alkali, Salts, and Surfactant on Rheological Behavior of Partially Hydrolyzed Polyacrylamide Solutions

et al. 2010

View full text Add to dashboard Cite

The rheological behavior of a polymer solution is very important for its application in enhanced oil recovery. An experimental study was conducted to examine the effects of salts, alkali, and surfactants on the rheological properties of partially hydrolyzed polyacrylamide (PHPAM) over a wide range of parameters. The experimental results show that addition of ionic species significantly reduces the polymer viscosity by reducing the hydrodynamic size of the polymer. The power-law model was used to describe the rheological properties of the solutions. The flow behavior index, n, of the samples was in the range from 0.232 to 0.275, while the consistency index, K, ranged from (1.45 to 5.76) Pa • s n . The variation of viscosity with temperature was also studied and found to satisfy the Arrhenius equation.

show abstract

“…PHEE has a number of interesting physical properties, not the least of which is its biodegradability, that make it a desirable choice for use in blends with various agricultural polymers. Recent studies of this material blended with starch have shown that composites may be made with acceptable levels of adhesion between the two phases and with mechanical and rheological behavior comparable to commercial engineering thermoplastics 11, 12. This article presents the first efforts to produce protein‐based PHEE blends with similar competitive properties.…”

Section: Introductionmentioning

confidence: 99%

Processing, mechanical properties, and fracture behavior of cereal protein/poly(hydroxyl ester ether) blends

Wang

Carriere

Willett

2002

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

Blends of poly(hydroxy ester ether) (PHEE), a recently developed bisphenol A ether‐based synthetic biodegradable thermoplastic polymer, with a soybean protein isolate and two hydrolyzed wheat glutens were studied. Blends of the proteins with PHEE were produced from 20 to 70% by weight of protein content. Young's moduli of the protein/PHEE blends fall in the range of 0.8–1.5 GPa with tensile strengths ranging from 10 to 30 MPa. Critical stress‐intensity factors of the blends ranged from 2 to 9 MPa‐m1/2 depending on the amount of protein added. Morphological analysis indicated a moderate degree of adhesion between the protein and PHEE phases in the blends. In general, as the protein content was increased the materials lost ductility and failed in a brittle manner; however, the mechanical properties of several compositions were comparable to commercial thermoplastics such as polystyrene. © 2002 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 40: 2324–2332, 2002

show abstract

Temperature dependence of the viscosity of highly starch-filled poly(hydroxy ester ether) biodegradable composites

Cited by 24 publications

References 0 publications

Surfactant Stabilized Oil-in-Water Nanoemulsion: Stability, Interfacial Tension, and Rheology Study for Enhanced Oil Recovery Application

Surfactant Stabilized Oil-in-Water Nanoemulsion: Stability, Interfacial Tension, and Rheology Study for Enhanced Oil Recovery Application

Effects of Alkali, Salts, and Surfactant on Rheological Behavior of Partially Hydrolyzed Polyacrylamide Solutions

Processing, mechanical properties, and fracture behavior of cereal protein/poly(hydroxyl ester ether) blends

Contact Info

Product

Resources

About