The Felting of Wool Fabrics Washed at Various Values of pH, and the Isoelectric Point Determined by Streaming Potential Measurements

Abstract

The zeta potentials of wools treated by chlorination and by chlorine/Hercosett have been found to differ markedly. Fabrics made from the two wools and from a blend of the two were washed together at two values of pH. Under these conditions there is no evidence that surface charge effects make any contribution to felting shrinkage.

Problems and results of zeta-potential measurements on fibers

“…Dependence of plug resistance (10 4 N KC1 solution) on measuring method and packing density [80] Assuming that Us/Ap and IdA p can be measured exactly, only the plug resistance RD remains. As mentioned before, the plug resistance, that is the resistance of the electrolyte solution within the plug, can be determined either my means of a Wheatstone bridge at 1000 Hz or by means of equation (42). Values of RD determined by both methods differ significantly ( fig.…”

“…Such phenomena, as electroviscous effects, volume and rate of sedimentation, uptake of Wood origin, pulping process, bleaching [1][2][3][4] Relations between zeta-potential and flocculation, sizing, retention and uptake of additives, [1][2][3][4][5][6][7][8][9][10] explanation of additives action, relation between zeta-potential and stability of paper Adsorption of dyestuffs and additives in dependence on zeta-potential [11][12][13][14][15][16][17][18][19][20][21][22] Uptake of additives by electrostatic forces, explanation of their action [23-25] Characterization of antistatic agents, lubricants etc. by means of instationary zeta-potential, [26][27] uptake and effect of processing additives [23][24][25]28] Adhesion of soil particles on fibers, adhesion of polyester resins on glass fibers, [29][30][31][32] soiling of felts used in paper-making [33] Investigations on mechanism of washing [34-38] Influence of origin and processing on zeta-potential [39][40][41]116] Influence of wool processing on zeta-potential [42][43] *) Dedicated to Prof. Dr. F. R. Schwar...…”

Interaction between the Surface Properties of the Textiles and the Deposition of Cationic Softener

“…The determination of the streaming potentials, which are produced by the electrical fields set up when a liquid flows past a charged surface, indicates the nature of the surface charge [18]. The importance of the zeta potential for the interaction of wool, cellulosic fibres, natural fibres and PET fibres with composite materials and for modification of surface properties has been investigated [19][20][21][22][23]. The role of zeta potential in surfactant adsorption on the surface of a fabric was studied long ago by Harris and was again reported by Karin et al for cellulosic fibres [24].…”

Adsorption of Amino-Functional Polymer Particles onto Keratin Fibres

“…of oil and water repellency (17)(18)(19)(20). A common feature of most polymers used in wool processing is their cationic na-EXPERIMENTAL ture which facilitates their adsorption onto the wool fiber surface, which is negatively charged above the point of zero Materials charge at pH of approximately 2.5-3.6 (15,(21)(22)(23).…”

“…At this pH the wool fiber surface is negatively the heat up and the reaction phase. The monomers (29.09 g charged (15,(21)(22)(23) and the polymer particles are positively ST, 0.79 g DVB, 1.78 g VBAC) were added into the reactor charged. In addition, many scales contained only a few polyas soon as the temperature reached 80ЊC.…”