Using jet mixing to prepare polyelectrolyte complexes: Complex properties and their interaction with silicon oxide surfaces

被引:24
作者
Ankerfors, Caroline [1 ,2 ]
Ondaral, Sedat [3 ]
Wagberg, Lars [1 ]
Odberg, Lars [1 ]
机构
[1] KTH Royal Inst Technol, Dept Fibre & Polymer Technol, SE-10044 Stockholm, Sweden
[2] Eka Chem AB, SE-44580 Bohus, Sweden
[3] Karadeniz Tech Univ, Fac Forestry, Dept Pulp & Paper Technol, TR-61080 Trabzon, Turkey
关键词
Adsorption; Jet mixing; Mixing time; Polyelectrolytes; Polyelectrolyte complex; STRENGTH PROPERTIES; MULTILAYERS; ADSORPTION; REFLECTOMETRY; KINETICS; SPHERE; FLOW;
D O I
10.1016/j.jcis.2010.07.027
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The influence of mixing procedure on the properties of polyelectrolyte complexes (PECs) was investigated using two complexation techniques, polyelectrolyte titration and jet mixing, the latter being a new method for PEC preparation. For the low-molecular-weight polyelectrolytes polyacrylic acid (PAA) and polyallyl amine hydrochloride (PAH), shorter mixing times produced smaller PECs, whereas for higher molecular weights of the same polyelectrolytes, PEC size first decreased with decreasing mixing time to a certain level, after which it started increasing again. This pattern was likely due to the diffusion-controlled formation of "pre-complexes", which, in the case of low-molecular-weight polymers, occurs sufficiently quickly to form stable complexes; when polyelectrolytes are larger, however, non-equilibrium pre-complexes, more prone to aggregation, are formed. Comparing the techniques revealed that jet mixing produced smaller complexes, allowing PEC size to be controlled by mixing time, which was not the case with polyelectrolyte titration. Higher polyelectrolyte concentration during jet mixing led to the formation of larger PECs. It was also demonstrated that PEC size could be changed after preparation: increasing the pH of the PEC dispersion led to an irreversible increase in PEC size, whereas lowering the pH did not influence PEC size. The adsorption behavior of PECs formed from weak polyelectrolytes on model substrates was studied using QCM-D, SPAR, and AFM imaging; the results indicated that increasing the pH increased the amount of PECs adsorbed to model surfaces. However, the amount of PECs adsorbed to the model surfaces was low compared with other systems in all studied cases. (C) 2010 Elsevier Inc. All rights reserved.
引用
收藏
页码:88 / 95
页数:8
相关论文
共 27 条
[1]   Role of electrostatic interactions in particle adsorption [J].
Adamczyk, Z ;
Warszynski, P .
ADVANCES IN COLLOID AND INTERFACE SCIENCE, 1996, 63 :41-149
[2]   A comparison of polyelectrolyte complexes and multilayers: Their adsorption behaviour and use for enhancing tensile strength of paper [J].
Ankerfors, Caroline ;
Lingstrom, Rikard ;
Wagberg, Lars ;
Odberg, Lars .
NORDIC PULP & PAPER RESEARCH JOURNAL, 2009, 24 (01) :77-86
[3]  
[Anonymous], 1992, INTERMOLECULAR SURFA
[4]   DISPERSION OF VISCOUS-LIQUIDS BY TURBULENT-FLOW IN A STATIC MIXER [J].
BERKMAN, PD ;
CALABRESE, RV .
AICHE JOURNAL, 1988, 34 (04) :602-608
[5]   Kinetics of particle adsorption in stagnation point flow studied by optical reflectometry [J].
Bohmer, MR ;
van der Zeeuw, EA ;
Koper, GJM .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1998, 197 (02) :242-250
[6]   Polyelectrolyte complex formation in highly aggregating systems. 1. Effect of salt: Polyelectrolyte complex formation in the presence of NaCl [J].
Dautzenberg, H .
MACROMOLECULES, 1997, 30 (25) :7810-7815
[7]  
Dautzenberg H, 2001, SURF SCI SERIES, V99, P743
[8]   REFLECTOMETRY AS A TOOL FOR ADSORPTION STUDIES [J].
DIJT, JC ;
STUART, MAC ;
FLEER, GJ .
ADVANCES IN COLLOID AND INTERFACE SCIENCE, 1994, 50 :79-101
[9]   Polyelectrolyte complex dispersions with a high colloidal stability controlled by the polyion structure and titrant addition rate [J].
Dragan, Ecaterina Stela ;
Mihai, Marcela ;
Schwarz, Simona .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2006, 290 (1-3) :213-221
[10]   Polyelectrolyte complexes. VII. Complex nanoparticles based on poly(sodium 2-acrylamido-2-methylpropanesulfonate) tailored by the titrant addition rate [J].
Dragan, ES ;
Schwarz, S .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2004, 42 (20) :5244-5252