Effects of addition of anionic and cationic surfactants to poly(N-isopropylacrylamide) microgels with and without acrylic acid groups

被引：6
作者：
Al-Manasir, Nodar [1 ]
Zhu, Kaizheng [1 ]
Kjoniksen, Anna-Lena [1 ,2 ]
Knudsen, Kenneth D. [3 ]
Nystrom, Bo [1 ]
机构：
[1] Univ Oslo, Dept Chem, N-0315 Oslo, Norway
[2] Univ Oslo, Sch Pharm, Dept Pharmaceut, N-0316 Oslo, Norway
[3] Inst Energy Technol, Dept Phys, N-2027 Kjeller, Norway
来源：
COLLOID AND POLYMER SCIENCE | 2012年 / 290卷 / 10期
关键词：
Temperature-responsive contraction; Aggregation; Charged surfactant; PNIPAAM; Dynamic light scattering; Turbidity; Zeta potential; SODIUM DODECYL-SULFATE; POLY-N-ISOPROPYLACRYLAMIDE; AQUEOUS-SOLUTION; THERMORESPONSIVE BEHAVIOR; COPOLYMER MICROGELS; TEMPERATURE; PH; PARTICLES; AGGREGATION; CHLORIDE;
D O I：
10.1007/s00396-012-2607-0
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 interaction of the anionic surfactant sodium dodecyl sulfate (SDS) and the cationic surfactant hexadecyl trimethyl ammonium bromide with poly(N-isopropylacrylamide) (PNIPAAM) microgels with and without poly(acrylic acid) (PAA) was investigated by means of dynamic light scattering (DLS), zeta potential, and turbidimetry measurements. The DLS results show that the PNIPAAM microgels with PAA will contract when an anionic or cationic surfactant is added to the suspension, while the PNIPAAM microgels without PAA expand in the presence of an ionic surfactant. A collapse of the PNIPAAM microgels is observed when the temperature is increased. From the zeta potential measurements, it is observed that the charge density of PNIPAAM microgels in the presence of an ionic surfactant is significantly affected by temperature and the attachment of the negatively charged PAA groups. The turbidity measurements clearly indicate that the interaction between PNIPAAM and SDS is more pronounced than that of the cationic surfactant.
引用
收藏
页码：931 / 940
页数：10
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