منابع مشابه
Rheology of biopolymer solutions and gels.
Rheological techniques and methods have been employed for many decades in the characterization of polymers. Originally developed and used on synthetic polymers, rheology has then found much interest in the field of natural (bio) polymers. This review concentrates on introducing the fundamentals of rheology and on discussing the rheological aspects and properties of the two major classes of biop...
متن کاملPhysical properties of polyacrylamide gels probed by AFM and rheology
Polymer gels have been shown to behave as viscoelastic materials but only a small amount of data is usually provided in the glass transition. In this paper, the dynamic moduli G′ and G′′ of polyacrylamide hydrogels are investigated using both an AFM in contact force modulation mode and a classical rheometer. The validity is shown by matching of the two techniques. Measurements are carried out o...
متن کاملStructure and rheology of gelatin and collagen gels.
This paper undertakes a parallel analysis of the gelation mechanisms, structure and rheological properties of gelatin and collagen gels. Although the molecular compositions of collagen and gelatin are almost identical, gelation proceeds from distinct mechanisms and leads to different types of molecular assemblies. First are presented the properties of the solutions, based on their structural an...
متن کاملRheology and Water Swelling of Carboxymethyl Starch Gels
A series of gels differing in ionic content was prepared by derivatizing starch with varying amounts of carboxymethyl add-on. Some derivatives were lightly crosslinked with epichlorohydrin to reduce soluble material and increase the amount of gel. The gel fraction of each batch was isolated. and viscosity 1]. shear modulus G. and swelling in water and salt solution were then determined. One gel...
متن کاملRheology and Mechanical Strength of Cementitious Composite with Nano-particles
Nano-TiO2 (NT) and nano-SiO2 (NS) were separately added in the cement paste to investigate the rheological property of fresh mixtures and mechanical strength in hardened state. The effects of different dosages and types of nano-particles on the properties of cement paste were studied. The results indicated that the rheological behavior of the fresh cement paste coincides with the Modified Bingh...
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ژورنال
عنوان ژورنال: Kobunshi
سال: 2005
ISSN: 0454-1138,2185-9825
DOI: 10.1295/kobunshi.54.474