Ionically self-assembled carboxymethyl cellulose/surfactant complexes for antistatic paper coatings

Preparation and thermal stability of carboxymethyl starch/quaternary ammonium salts complexes

“…Barck and Stenius (1994) investigated the interactions between CMC and C n H 2n+1 N(CH 3 ) 3 Br, n = 10, 12, 14, and 16, evaluating the effect of polymer charge density, surfactant chain length, and ionic force on CMC/alkyltrimethylammonium bromide (C n TAB) complex formation; they demonstrated by means of surface tension measurements and phase diagrams that the amount of carboxylate groups in the starting CMC is a determinant parameter and that, in solution, more stable aggregates are formed as the length of the surfactant increases. Tiitu, Laine, Serimaa, and Ikkala (2006) characterized complexes obtained from CMC (DS = 0.9) and alkyltrimethyl ammonium chlorides with different alkyl chain lengths; SAXS experiments showed a cylindrical self-assembly in bulk samples and, upon their exposition to moisture, conductivities of ca. 10 −5 S/cm at room temperature were achieved, which would allow the use of these compounds for antistatic paper coatings.…”

The effect of hydrophobic modifications on the adsorption isotherms of cassava starch

“…Hence, a great amount of research work has been carried out to chemically modify starches in order to obtain less hydrophilic materials. One of the paths that have been tried with both native and carboxymethylated starch is the chemical incorporation of hydrophobic groups such as alkyl ethers or alkyl esters (Biswas et al, 2008;Rivero, Balsamo, & Müller, 2009), polymer chains grafting onto starch (Kaewtatip & Tanrattanakul, 2008), or complex formation with surfactants (quaternary ammonium salts) (Naves & Petri, 2005;Tiitu, Laine, Serimaa, & Ikkala, 2006). Modified starches can be used in different food applications, where native starches are unable to confer desired functional characteristics in the final product; they can also act, when added to polymer blends, as compatibilizers (Chen et al, 2005;Wang, Sun, & Seib, 2001;Zhang & Sun, 2004).…”

Fluorescent Nanoparticles through Self‐Assembly of Linear Ionenes and Pyrenetetrasulfonate

“…[19][20][21][22][23][24] Ionic interaction is the origin of assemblies such as DNA-histone complexes. Solid self-assembled structures based on ionic interactions include polyelectrolyte-surfactant complexes [25][26][27][28][29][30][31][32][33][34] or dye-surfactant complexes, [35][36][37] that is, are formed due to a combination of electrostatic and hydrophobic interactions. Properties and applications discussed for such materials include coatings with ultralow surface tension or special optical, electrical, and mechanical properties.…”