Palygorskites properties

The term fibrous, as applied to zeolites, does not necessarily indicate flexibility. Flexibility, however, is one of the physical properties of cotton stone found on the Isle of Skye, Scotland. This locality provides a feathery sample of mesolite, (Na2Ca2Al6SigO30 8H2O), whose composition and structure place it in the same group as natrolite. The similarity between appearance of this sample and that of the mountain flax variety of palygorskite emphasizes the difficulty of identifying fibrous minerals based on morphology alone. 

E. Galan, Properties and applications of palygorskite, sepilite clays, Clays Minerals 31, 443- 445 (1996). 

Frini-Srasra, N., Kriaa, A., and Srasra, E., Acid-base properties of Tunisian palygorskite in aqueous medium, Russ. J. Electrochem.. 43, 795. 2007. 

Sepiolite/ Palygorskite Phyllosilicates Marine sediments, arid soils, high Si and Mg levels R Moderately high CEC.15 surface area, and sorptive properties... 

This chapter reviews the use of the sepiolite/palygorskite group of clays as a nanofiller for polymer nanocomposites. Sepiolite and palygorskite are characterized by a needle-like or fiber-like shape. This peculiar shape offers unique advantages in terms of mechanical reinforcement while, at the same time, it allows to study the effect of the nanofiller s shape on the final composite properties. The importance of the nanofiller shape for the composite properties is analyzed in Section 12.2, introducing the rationale of the whole chapter. After a general description of needle-like nanoclays in Section 12.3, the chapter develops into a main part (Section 12.4), reviewing the preparation methods and physical properties of polyolefin/needle-like clay nanocomposites. 

Traditional Industrial Applications of Sepiolite and Palygorskite and Their Physicochemical Properties... 

Mechanical Properties of In Situ Polymerized PE/Palygorskite Nanocomposites... 

Galan, E. 1996. Properties and apipUcations of palygorskite-sepioUte clays. Cta/Mmera/s 31 443-453. 

The use of palygorskite with grafted octadecyl acrylate, a cationic surfactant, and atactic polypropylene favors its further compatibUization with PP, giving rise to nanocomposites with improved mechanical properties (e.g., 123% and 23% higher... 

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