TY - JOUR
T1 - Adsorption behavior of polystyrene-polyisoprene diblock copolymers with zwitterionic groups using quartz crystal microbalance
T2 - Effect of different microstructures
AU - Park, Mi Kyoung
AU - Youk, Ji Ho
AU - Pispas, Stergios
AU - Hadjichristidis, Nikos
AU - Advincula, Rigoberto
PY - 2002/10/15
Y1 - 2002/10/15
N2 - The adsorption behavior of poly(styrene-b-isoprene) (PS-b-PI) copolymers functionalized with polar sulfobetaine zwitterionic groups at different positions along the backbone was investigated. Using dilute solutions in toluene, adsorption onto gold surface was investigated using a quartz crystal microbalance (QCM). ZwIS and ZwSI, ZwISZw, and SZwI are PS-b-PI copolymers functionalized at the α-position (zwitterionic group is attached to isoprene or styrene), at the α, ω-positions, and at the junction-point in the chain, respectively. The copolymers showed interesting adsorption behavior according to the zwitterion position. The adsorption isotherms for the copolymers exhibited typical Langmuir isotherm behavior. They showed different adsorbing amounts, which was explained by possible conformational states of copolymers on the surface. It was found that the position of zwitterionic groups has a major role on adsorption kinetics despite similar molecular weight and composition for the copolymers.
AB - The adsorption behavior of poly(styrene-b-isoprene) (PS-b-PI) copolymers functionalized with polar sulfobetaine zwitterionic groups at different positions along the backbone was investigated. Using dilute solutions in toluene, adsorption onto gold surface was investigated using a quartz crystal microbalance (QCM). ZwIS and ZwSI, ZwISZw, and SZwI are PS-b-PI copolymers functionalized at the α-position (zwitterionic group is attached to isoprene or styrene), at the α, ω-positions, and at the junction-point in the chain, respectively. The copolymers showed interesting adsorption behavior according to the zwitterion position. The adsorption isotherms for the copolymers exhibited typical Langmuir isotherm behavior. They showed different adsorbing amounts, which was explained by possible conformational states of copolymers on the surface. It was found that the position of zwitterionic groups has a major role on adsorption kinetics despite similar molecular weight and composition for the copolymers.
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U2 - 10.1021/la025913g
DO - 10.1021/la025913g
M3 - Article
AN - SCOPUS:0037109742
VL - 18
SP - 8040
EP - 8044
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 21
ER -