Self-organization in the flow of complex fluids (colloid and polymer systems)

Malkin, A. Ya.; Semakov, A. V.; Куличихин, В. Г.

doi:10.1016/j.cis.2010.04.002

Cited by 45 publications

(21 citation statements)

References 235 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The phenomenon happens as a result of disruption of hydrogen bonding with water molecules and the formation of hydrophobic associations among isopropyl moieties of PNIPAM [45,46]. Consequently, a resistance to flow and hence increase in viscosity at low shear rates can be observed due to formation of compact particles [47]. However, further increase in temperature (above 50 °C) may cause dehydration of hydrogels and hence weaken the association of collapsed particles which leads to decrease in viscosity due to an indirect shear thinning effect.…”

Section: Effect Of Temperature and Chemical Composition On The Rheolomentioning

confidence: 96%

Preparation, physicochemical and stability studies of chitosan-PNIPAM based responsive microgels under various pH and temperature conditions

et al. 2015

View full text Add to dashboard Cite

A transition from sol-to-gel state at temperature beyond 50 °C was also noticed in all hydrogel samples. On the basis of results obtained, we observed that variables such as NIPAM/chitosan ratio, amount of cross-linker, and temperature/pH not only affect the above mentioned properties but also affect the dual-sensitivity and stability of the microgels. Most of the chitosan-PNIPAM particles remained soluble and maintained good stability without significant sedimentation in water through a wide range of pH (pH ≈ 2-8) for about 3 months at room temperature.

show abstract

Section: Effect Of Temperature and Chemical Composition On The Rheolomentioning

confidence: 96%

Preparation, physicochemical and stability studies of chitosan-PNIPAM based responsive microgels under various pH and temperature conditions

et al. 2015

View full text Add to dashboard Cite

show abstract

“…28 Therefore, the successive electrostatic extension of the electrified liquid jet along its axis readily orients the a-helices parallel to the flow direction of the liquid jet despite the rapid solidification of the liquid jet. 21,27,28,33 In addition, the highly ordered structure homogeneously formed in the jet would not be significantly distorted by the orientational relaxation processes. These findings revealed that the orientation of the ordered structure in the electrospun PBLG nanofiber is controlled by the initial microstructure of the spinning solutions.…”

Section: Characterizationmentioning

confidence: 99%

“…Figure 5b, in which the polarization of light is parallel to the fiber axis, also shows the striations in the fiber. These periodical striations in the POM observation of PBLG are known as a 'banded texture' , which is commonly observed for PBLG and other LCPs after the cessation of elongation or shearing because of orientation relaxation processes 25,26,27 and one of the hexagonal columnar textures. 13 The appearance of the banded texture is understood to be an undulation of the molecular orientation of LCP, such as a serpentine trajectory because of orientation relaxation, in which the period of the striation corresponds to the half period of the serpentine trajectory (that is, the period of the trajectory is 1.2-1.4 mm).…”

Section: Characterizationmentioning

confidence: 99%

“…26 Herein, we examined the effect of the ordered LC structure of the spinning solution on the internal structure of the fibers using isotropic and biphasic PBLG/CH 2 Cl 2 -pyridine solutions (the concentrations of the isotropic and biphasic solutions were 7.5 wt% and 8 wt%, respectively). 27,28 We prepared nanofibers from the isotropic and biphasic solutions based on the conditions listed in Table 1. As previously mentioned, the birefringence measurement showed that the internal orientation of the PBLG depends on the fiber diameter.…”

Section: Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Preparation of poly(γ-benzyl-L-glutamate) nanofibers by electrospinning from isotropic and biphasic liquid crystal solutions

Tsuboi

Marcelletti

Matsumoto

et al. 2012

Polym J

View full text Add to dashboard Cite

Liquid crystal polymer (LCP) nanofibers were prepared by electrospinning from isotropic and biphasic poly(c-benzyl-L-glutamate) (PBLG)/dichloromethane-pyridine solutions. The prepared fibers were characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, polarized optical microscopy, wide-angle X-ray diffraction and polarized micro-Raman spectroscopy. The as-spun PBLG fiber from the isotropic solutions had an undulating orientation of closed-packed a-helices similar to a serpentine trajectory in their internal structures. The as-spun PBLG fibers from the biphasic solutions that contained the LC phase had uniaxially oriented hexagonal lattices of a-helices along the fiber axis. These results indicated that the orientation of the ordered structure of the electrospun lyotropic LCP fibers can be controlled by the initial microstructure of the spinning solution.

show abstract

“…The recent work of Pasquino et al 6 on dilute suspensions of hard spheres in a worm-like micellar solution showed the formation of string-like structures at low shear rates and 2D crystals at high shear rates. For a review on flow-induced ordering in complex fluids, we refer the reader to Malkin et al 7 The Vermant group 8 has recently shown that alignment typically occurs at the walls of the rheometer, following colloidal migration from the bulk towards these walls. Worm-like micellar solutions are exceptional by producing alignment in the bulk.…”

Section: Introductionmentioning

confidence: 99%

Alignment of particles in sheared viscoelastic fluids

Oliveira

Noort

Padding

et al. 2011

The Journal of Chemical Physics

View full text Add to dashboard Cite

Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Related ArticlesStability of solvated nanosheet in shear flow Appl. Phys. Lett. 97, 214102 (2010) Analysis of the configurational temperature of polymeric liquids under shear and elongational flows using nonequilibrium molecular dynamics and Monte Carlo simulations J. Chem. Phys. 132, 184906 (2010) Dynamics and rheology of wormlike micelles emerging from particulate computer simulations J. Chem. Phys. 129, 074903 (2008) Coarse-grained molecular dynamics simulation on the placement of nanoparticles within symmetric diblock copolymers under shear flow J. Chem. Phys. 128, 164909 (2008) Nonequilibrium molecular dynamics of the rheological and structural properties of linear and branched molecules. Simple shear and poiseuille flows; instabilities and slip J. Chem. Phys. 123, 054907 (2005) Additional information on J. Chem. Phys. We investigate the shear-induced structure formation of colloidal particles dissolved in nonNewtonian fluids by means of computer simulations. The two investigated visco-elastic fluids are a semi-dilute polymer solution and a worm-like micellar solution. Both shear-thinning fluids contain long flexible chains whose entanglements appear and disappear continually as a result of Brownian motion and the applied shear flow. To reach sufficiently large time and length scales in threedimensional simulations with up to 96 spherical colloids, we employ the responsive particle dynamics simulation method of modeling each chain as a single soft Brownian par...

show abstract

Self-organization in the flow of complex fluids (colloid and polymer systems)

Cited by 45 publications

References 235 publications

Preparation, physicochemical and stability studies of chitosan-PNIPAM based responsive microgels under various pH and temperature conditions

Preparation, physicochemical and stability studies of chitosan-PNIPAM based responsive microgels under various pH and temperature conditions

Preparation of poly(γ-benzyl-L-glutamate) nanofibers by electrospinning from isotropic and biphasic liquid crystal solutions

Alignment of particles in sheared viscoelastic fluids

Contact Info

Product

Resources

About