Structure Formation in Solution: Ionic Polymers and Colloidal Particles

ISBN-13: 9783642427701 / Angielski / Miękka / 2014 / 350 str.

Norio Ise;Ikuo Sogami

Opis

1. 1 Macroionic Systems and the Scope of the Book Inthepresentmonograph, wewilldiscussionicpolymersolutionsandcolloidal dispersions. When these substances are dissolved into a solvent, they produce ionicspecies havinglargemolecularweightsandtheir counterions. We knowa variety of naturally occurring ionic polymers and chemically synthesizedc- pounds. Examples of the former are nucleic acids and some proteins, which playanimportantroleinbiologicalsystems. Examplesofsyntheticionicpo- mers are polyacrylic acid (PAA), polystyrenesulfonic acid (PSS) and poly- lylamine (PAAm). PAAisahighpolymer, inwhichmacrylicacidmoleculesCH =CH(COOH) 2 arelinearlypolymerizedby covalent bonds. Thenumber mis calledthe degree 3 of polymerization and is usually of the order of 10 . When PAA is dissolved in a dissociating solvent like water, anionic macroions and counterions are produced. In the following scheme, the counterions are protons but they may + be metal cations such as Na: ? ? ? ? ?CH ? CH? ?CH ? CH? 2 2 + ? ? ? ? - ? - + mH ? COOH COO m m PAA PAA anion Counterions. PAAm is a cationic polymer and dissociates into PAAm cations and anionic counterions as shown below: ? ? ? ? ?CH ? CH? ?CH ? CH? 2 2 ? ? ? ? ? - +mHCl ? - +mCl + CH ?NH CH ?NH 2 2 2 3 m m PAAm PAAm cation Counterions. 2 1 Introduction + ? In the case of NaCl, it dissociates into Na and Cl, which both have low molecular weights. On the other hand, PAA anions and PAAm cations have 3 highmolecularweights. Ifmis10, onepolymerion(macroion)hasananalyt- 3 + icalchargenumberZ of10, whichisexceedinglylargerthan1forNa .

Recenzje

"He found a promising approach in Sogami and Ise's treatments of 'electrostatic interactions in macro-ionic solutions' of spherical  macro-ions (Ise and Sogami, 2005)."

Clays and Clay Minerals, Vol. 54, No. 6, 773-775, 2006

Spis treści

Effective Interactions between Macroions 1.- Dilute Solutions of Flexible and Spherical Ionic Polymers.- Colloidal Dispersions.- Kikuchi—Kossel Line Analysis on Colloidal Crystals.- Effective Interactions between Macroions 2.- Viscometric Properties of Dilute Ionic Polymer Solutions and Colloidal Dispersions.- Phase Transitions by Computer Simulation.- Further Problems of Interparticle Interaction.