Preparation, characterization and novel photoregulated rheological properties of azobenzene functionalized cellulose derivatives and their α-CD complexes

Polymer ◽  
2004 ◽  
Vol 45 (18) ◽  
pp. 6219-6225 ◽  
Author(s):  
X. Hu ◽  
P.J. Zheng ◽  
X.Y. Zhao ◽  
L. Li ◽  
K.C. Tam ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Cellulose Derivatives

Rheological properties and associated structural characteristics of some aromatic polycondensates including liquid-crystalline polyesters and cellulose derivatives (IUPAC Technical Report)

2004 ◽  
Vol 76 (11) ◽  
pp. 2027-2049 ◽  
Author(s):  
J. L. White ◽  
L. Dong ◽  
P. Han ◽  
H. M. Laun
Keyword(s):  
Shear Flow ◽  
Rheological Properties ◽  
Liquid Crystalline ◽  
Structural Characteristics ◽  
Cellulose Derivatives ◽  
Extrudate Swell ◽  
Polymer Liquid Crystals ◽  
Uniaxial Orientation ◽  
Technical Report ◽  
Thermotropic Polymer

A comparative experimental study of shear-flow rheological properties of thermotropic polymer liquid crystals by eight different laboratories is described. The materials involved four different liquid-crystalline polyesters (LCPs), a glass- fiber-filled liquid-crystalline polyester,hydroxypropyl cellulose (HPC), and two non-liquid-crystalline high-temperature polymers, a poly(etheretherketone) (PEEK), and a polyarylate (PAR). Studies were made in both steady shear-flow and dynamic oscillatory experiments. The data from the various laboratories involved were compared. The level of agreement in the data was much less for most liquid-crystalline polymers than for similar isotropic melts. The Cox –Merz rule is valid for PEEK and PAR, but not for the LCPs and HPC. The occurrence of low levels of extrudate swell and high levels of uniaxial orientation in extrudates of the LCPs and HPC is described.

Phase equilibria in solutions of cellulose derivatives and the rheological properties of solutions in various phase states

2010 ◽  
Vol 52 (11) ◽  
pp. 1196-1208 ◽  
Author(s):  
V. G. Kulichikhin ◽  
V. V. Makarova ◽  
M. Yu. Tolstykh ◽  
G. B. Vasil’ev
Keyword(s):  
Phase Equilibria ◽  
Rheological Properties ◽  
Cellulose Derivatives

Rheological Properties of Liquid Crystalline Solutions of Cellulose Derivatives

2021 ◽  
Vol 63 (4) ◽  
pp. 363-368
Author(s):  
S. A. Vshivkov ◽  
E. V. Rusinova ◽  
A. S. Abo Saleh
Keyword(s):  
Rheological Properties ◽  
Liquid Crystalline ◽  
Cellulose Derivatives

scholarly journals Hydrogels in Hand Sanitizers

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1577
Author(s):  
Carla Villa ◽  
Eleonora Russo
Keyword(s):  
Hand Hygiene ◽  
Rheological Properties ◽  
Food Industry ◽  
Aqueous Media ◽  
Synthetic Polymers ◽  
Cellulose Derivatives ◽  
Thickening Behavior ◽  
And Behaviors ◽  
Legal Frameworks ◽  
At Home

Hand hygiene can be considered a strategic key useful in the containment of infections such as COVID-19 both at home and in communities because it can dramatically reduce the widespread outbreak of infections. In case of the unavailability of soap and water, “instant” hand sanitizers are recommended because their application can be considered easy, versatile, quick and often less aggressive for the skin. For these reasons, alcoholic and alcohol-free hand rub gels can be considered the best performing formulations on the market. Together with disinfectants and antiseptic agents, hydrogels play a fundamental role in obtaining stable formulations and are easy to disperse, with a pleasant skin feel and an overall good performance. Several compounds commonly used in the pharmaceutical, cosmetic and food industry are available for this purpose, in particular, cellulose derivatives and synthetic polymers derivatives. Each of them is available in several grades, presenting different thickening behavior, rheological properties and compatibility with other ingredients, alcohols in particular. For all these reasons, it is important to explore hydrogel properties and behaviors in different contexts (i.e., hydroalcoholic and aqueous media) in order to develop new and performing hand rub gels, always taking into account the different international legal frameworks regarding disinfectant and sanitizing formulations.

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