Premium
Studies on interfacial properties of polyelectrolyte‐cellulose systems. I. Formation and structure of adsorbed layers of cationic polyelectrolyte‐(poly‐DMDAAC) on cellulose fibers
Author(s) -
Onabe Fumihiko
Publication year - 1978
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1978.070221214
Subject(s) - monolayer , polyelectrolyte , van der waals force , adsorption , carboxymethyl cellulose , polymer , cationic polymerization , cellulose fiber , polyelectrolyte adsorption , chemical engineering , polymer chemistry , cellulose , chemistry , polymer adsorption , materials science , organic chemistry , molecule , nanotechnology , sodium , engineering
An investigation of the conditions for monolaver or multilayer formations of cationic polyelectrolyte on cellulose fibers using adsorption, hydrodynamic permeability, and electrokinetic measurements is described. ζ‐potential measurements by streaming current method were made on polymer‐treated fiber pads. Monolayer formations on cotton linter (CT) fibers and dissolving pulp (DP) and multilayer formation on carboxymethyl cellulose (CMC) fibers were demonstrated. Monolayer formation proceeds by electrostatic interaction and Van der Waals force until all the negative charges of the fibers are neutralized. After charge neutralization, adsorption proceeds by Van der Waals force until formation of a saturated monolayer is completed. Multilayer formation proceeds mainly by electrostatic force until all the carboxyls of the fibers are neutralized. The presence of excess negative charge due to unneutralized carboxyls at the point of monolayer formation on CMC is the prerequisite for further adsorption to form a saturated multilayer. Affinity of the interactions, configurations of the adsorbed polymer chains, thickness of monolayer and multilayer, the effect of polymer molecular weights, and the stoichiometry of charge neutralization are discussed. A multilayer adsorption model is proposed to account for the experimental data.