Insights into the interactions among surfactin, betaines, and PAM: Surface tension, small-Angle neutron scattering, and small-Angle x-ray scattering study

Jingwen Xiao, Fang Liu, Vasil M. Garamus, L. Almásy, Ulrich A. Handge, Regine Willumeit, Bozhong Mu, Aihua Zou

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The interactions among neutral polymer polyacrylamide (PAM) and the biosurfactant Surfactin and four betaines, N-dodecyl-N,N-dimethyl-3-Ammonio-1- propanesulfonate (SDDAB), N-tetradecyl-N,N-dimethyl-3-Ammonio-1-propanesulfonate (STDAB), N-hexadecyl-N,N-dimethyl-3-Ammonio-1-propanesulfonate (SHDAB), and N-dodecyl-N,N-dimethyl-2-Ammonio-Acetate (C12BE), in phosphate buffer solution (PBS) have been studied by surface tension measurements, small-Angle neutron scattering (SANS), small-Angle X-ray scattering (SAXS), and rheological experiments. It has been confirmed that the length of alkyl chain is a key parameter of interaction between betaines and PAM. Differences in scattering contrast between X-ray and neutrons for surfactants and PAM molecules provide the opportunity to separately follow the changes of structure of PAM and surfactant aggregates. At concentrations of betaines higher than CMC (critical micelle concentration) and C2 (CMC of surfactant with the presence of polymer), spherical micelles are formed in betaines and betaines/PAM solutions. Transition from spherical to rod-like aggregates (micelles) has been observed in solutions of Surfactin and Surfactin/SDDAB (αSurfactin = 0.67 (molar fraction)) with addition of 0.8 wt % of PAM. The conformation change of PAM molecules only can be observed for Surfactin/SDDAB/PAM system. Viscosity values follow the structural changes suggested from scattering measurements i.e., gradually increases for mixtures PAM → Surfactin/PAM → Surfactin/SDDAB/PAM in PBS.

Original languageEnglish
Pages (from-to)3363-3372
Number of pages10
JournalLangmuir
Volume30
Issue number12
DOIs
Publication statusPublished - Apr 1 2014

Fingerprint

Small Angle Scattering
Betaines
Betaine
betaines
Surface Tension
Neutrons
x ray scattering
Neutron scattering
Polyacrylates
Surface tension
interfacial tension
neutron scattering
X-Rays
Scattering
micelles
X rays
surfactants
Micelles
interactions
phosphates

ASJC Scopus subject areas

  • Electrochemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science(all)
  • Spectroscopy
  • Medicine(all)

Cite this

Insights into the interactions among surfactin, betaines, and PAM : Surface tension, small-Angle neutron scattering, and small-Angle x-ray scattering study. / Xiao, Jingwen; Liu, Fang; Garamus, Vasil M.; Almásy, L.; Handge, Ulrich A.; Willumeit, Regine; Mu, Bozhong; Zou, Aihua.

In: Langmuir, Vol. 30, No. 12, 01.04.2014, p. 3363-3372.

Research output: Contribution to journalArticle

Xiao, Jingwen ; Liu, Fang ; Garamus, Vasil M. ; Almásy, L. ; Handge, Ulrich A. ; Willumeit, Regine ; Mu, Bozhong ; Zou, Aihua. / Insights into the interactions among surfactin, betaines, and PAM : Surface tension, small-Angle neutron scattering, and small-Angle x-ray scattering study. In: Langmuir. 2014 ; Vol. 30, No. 12. pp. 3363-3372.
@article{75904b70e98c4b2daeda06edc255d7ae,
title = "Insights into the interactions among surfactin, betaines, and PAM: Surface tension, small-Angle neutron scattering, and small-Angle x-ray scattering study",
abstract = "The interactions among neutral polymer polyacrylamide (PAM) and the biosurfactant Surfactin and four betaines, N-dodecyl-N,N-dimethyl-3-Ammonio-1- propanesulfonate (SDDAB), N-tetradecyl-N,N-dimethyl-3-Ammonio-1-propanesulfonate (STDAB), N-hexadecyl-N,N-dimethyl-3-Ammonio-1-propanesulfonate (SHDAB), and N-dodecyl-N,N-dimethyl-2-Ammonio-Acetate (C12BE), in phosphate buffer solution (PBS) have been studied by surface tension measurements, small-Angle neutron scattering (SANS), small-Angle X-ray scattering (SAXS), and rheological experiments. It has been confirmed that the length of alkyl chain is a key parameter of interaction between betaines and PAM. Differences in scattering contrast between X-ray and neutrons for surfactants and PAM molecules provide the opportunity to separately follow the changes of structure of PAM and surfactant aggregates. At concentrations of betaines higher than CMC (critical micelle concentration) and C2 (CMC of surfactant with the presence of polymer), spherical micelles are formed in betaines and betaines/PAM solutions. Transition from spherical to rod-like aggregates (micelles) has been observed in solutions of Surfactin and Surfactin/SDDAB (αSurfactin = 0.67 (molar fraction)) with addition of 0.8 wt {\%} of PAM. The conformation change of PAM molecules only can be observed for Surfactin/SDDAB/PAM system. Viscosity values follow the structural changes suggested from scattering measurements i.e., gradually increases for mixtures PAM → Surfactin/PAM → Surfactin/SDDAB/PAM in PBS.",
author = "Jingwen Xiao and Fang Liu and Garamus, {Vasil M.} and L. Alm{\'a}sy and Handge, {Ulrich A.} and Regine Willumeit and Bozhong Mu and Aihua Zou",
year = "2014",
month = "4",
day = "1",
doi = "10.1021/la4046034",
language = "English",
volume = "30",
pages = "3363--3372",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "12",

}

TY - JOUR

T1 - Insights into the interactions among surfactin, betaines, and PAM

T2 - Surface tension, small-Angle neutron scattering, and small-Angle x-ray scattering study

AU - Xiao, Jingwen

AU - Liu, Fang

AU - Garamus, Vasil M.

AU - Almásy, L.

AU - Handge, Ulrich A.

AU - Willumeit, Regine

AU - Mu, Bozhong

AU - Zou, Aihua

PY - 2014/4/1

Y1 - 2014/4/1

N2 - The interactions among neutral polymer polyacrylamide (PAM) and the biosurfactant Surfactin and four betaines, N-dodecyl-N,N-dimethyl-3-Ammonio-1- propanesulfonate (SDDAB), N-tetradecyl-N,N-dimethyl-3-Ammonio-1-propanesulfonate (STDAB), N-hexadecyl-N,N-dimethyl-3-Ammonio-1-propanesulfonate (SHDAB), and N-dodecyl-N,N-dimethyl-2-Ammonio-Acetate (C12BE), in phosphate buffer solution (PBS) have been studied by surface tension measurements, small-Angle neutron scattering (SANS), small-Angle X-ray scattering (SAXS), and rheological experiments. It has been confirmed that the length of alkyl chain is a key parameter of interaction between betaines and PAM. Differences in scattering contrast between X-ray and neutrons for surfactants and PAM molecules provide the opportunity to separately follow the changes of structure of PAM and surfactant aggregates. At concentrations of betaines higher than CMC (critical micelle concentration) and C2 (CMC of surfactant with the presence of polymer), spherical micelles are formed in betaines and betaines/PAM solutions. Transition from spherical to rod-like aggregates (micelles) has been observed in solutions of Surfactin and Surfactin/SDDAB (αSurfactin = 0.67 (molar fraction)) with addition of 0.8 wt % of PAM. The conformation change of PAM molecules only can be observed for Surfactin/SDDAB/PAM system. Viscosity values follow the structural changes suggested from scattering measurements i.e., gradually increases for mixtures PAM → Surfactin/PAM → Surfactin/SDDAB/PAM in PBS.

AB - The interactions among neutral polymer polyacrylamide (PAM) and the biosurfactant Surfactin and four betaines, N-dodecyl-N,N-dimethyl-3-Ammonio-1- propanesulfonate (SDDAB), N-tetradecyl-N,N-dimethyl-3-Ammonio-1-propanesulfonate (STDAB), N-hexadecyl-N,N-dimethyl-3-Ammonio-1-propanesulfonate (SHDAB), and N-dodecyl-N,N-dimethyl-2-Ammonio-Acetate (C12BE), in phosphate buffer solution (PBS) have been studied by surface tension measurements, small-Angle neutron scattering (SANS), small-Angle X-ray scattering (SAXS), and rheological experiments. It has been confirmed that the length of alkyl chain is a key parameter of interaction between betaines and PAM. Differences in scattering contrast between X-ray and neutrons for surfactants and PAM molecules provide the opportunity to separately follow the changes of structure of PAM and surfactant aggregates. At concentrations of betaines higher than CMC (critical micelle concentration) and C2 (CMC of surfactant with the presence of polymer), spherical micelles are formed in betaines and betaines/PAM solutions. Transition from spherical to rod-like aggregates (micelles) has been observed in solutions of Surfactin and Surfactin/SDDAB (αSurfactin = 0.67 (molar fraction)) with addition of 0.8 wt % of PAM. The conformation change of PAM molecules only can be observed for Surfactin/SDDAB/PAM system. Viscosity values follow the structural changes suggested from scattering measurements i.e., gradually increases for mixtures PAM → Surfactin/PAM → Surfactin/SDDAB/PAM in PBS.

UR - http://www.scopus.com/inward/record.url?scp=84897490203&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84897490203&partnerID=8YFLogxK

U2 - 10.1021/la4046034

DO - 10.1021/la4046034

M3 - Article

C2 - 24593673

AN - SCOPUS:84897490203

VL - 30

SP - 3363

EP - 3372

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 12

ER -