TY - JOUR
T1 - Components of cocamidopropyl betaine
T2 - Surface activity and self-assembly of pure alkyl amidopropyl betaines
AU - Kelleppan, Veena T.
AU - Butler, Calum S.G.
AU - Williams, Ashley P.
AU - Vidallon, Mark Louis P.
AU - Giles, Luke W.
AU - King, Joshua P.
AU - Sokolova, Anna V.
AU - de Campo, Liliana
AU - Pearson, Graeme R.
AU - Tabor, Rico F.
AU - Tuck, Kellie L.
N1 - Funding Information:
We are grateful to DKSH Performance Materials Australia Pty. Limited for financial support. We acknowledge the Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation for providing access to the neutron facilities (Bilby SANS) used in this work. The authors would like to thank AINSE Limited for providing financial assistance (Award - PGRA) to enable work on “Components of cocamidopropyl betaine: surface activity and self-assembly of pure alkyl amidopropyl betaines”. We also thank the Australian Institute of Nuclear Science and Engineering for financial and travel support (V.T.K, C.S.G.B, A.P.W, M.L.P.V, L.W.G and J.P.K). This work was supported in part by an ARC, Australia Linkage grant ( LP180100752 ). This work benefited from the use of the SasView application, originally developed under NSF award DMR-0520547. SasView contains code developed with funding from the European Union’s Horizon 2020 research and innovation programme under the SINE2020 project, grant agreement no. 654000 .
Funding Information:
We are grateful to DKSH Performance Materials Australia Pty. Limited for financial support. We acknowledge the Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation for providing access to the neutron facilities (Bilby SANS) used in this work. The authors would like to thank AINSE Limited for providing financial assistance (Award - PGRA) to enable work on “Components of cocamidopropyl betaine: surface activity and self-assembly of pure alkyl amidopropyl betaines”. We also thank the Australian Institute of Nuclear Science and Engineering for financial and travel support (V.T.K, C.S.G.B, A.P.W, M.L.P.V, L.W.G and J.P.K). This work was supported in part by an ARC, Australia Linkage grant (LP180100752). This work benefited from the use of the SasView application, originally developed under NSF award DMR-0520547. SasView contains code developed with funding from the European Union's Horizon 2020 research and innovation programme under the SINE2020 project, grant agreement no. 654000.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/1/5
Y1 - 2023/1/5
N2 - Cocamidopropyl betaine (CAPB) is widely used in personal care and industrial products, due to its mildness, simple synthesis, valuable surface active properties and synergism with other surfactants. CAPB is a mixture of amidopropyl betaines of different tail lengths, typically dominated by C12 (lauryl) amidopropyl betaine in commercial formulations. The feedstock used to synthesise this surfactant mixture dictates the specific individual amidopropyl betaine components present, their blend, and ultimately the properties of CAPB. Here, we investigate the surface activity and self-assembly of synthesised pure amidopropyl betaines that are typically found within CAPB. Small-angle neutron scattering, bubble pressure tensiometry, pendant drop tensiometry, foaming studies, and polarising light microscopy are employed to determine each molecule's behaviour. It is evident that an increase in alkyl tail length controls properties within this class of molecules, leading to greater surface activity and the formation of different micelle geometries in solution, and modulating adsorption dynamics and foaming capabilities. These results indicate potential for optimisation of CAPB feedstocks along with new and facile approaches to tuning the properties of mixed surfactant systems, using carefully selected tailgroup mixtures.
AB - Cocamidopropyl betaine (CAPB) is widely used in personal care and industrial products, due to its mildness, simple synthesis, valuable surface active properties and synergism with other surfactants. CAPB is a mixture of amidopropyl betaines of different tail lengths, typically dominated by C12 (lauryl) amidopropyl betaine in commercial formulations. The feedstock used to synthesise this surfactant mixture dictates the specific individual amidopropyl betaine components present, their blend, and ultimately the properties of CAPB. Here, we investigate the surface activity and self-assembly of synthesised pure amidopropyl betaines that are typically found within CAPB. Small-angle neutron scattering, bubble pressure tensiometry, pendant drop tensiometry, foaming studies, and polarising light microscopy are employed to determine each molecule's behaviour. It is evident that an increase in alkyl tail length controls properties within this class of molecules, leading to greater surface activity and the formation of different micelle geometries in solution, and modulating adsorption dynamics and foaming capabilities. These results indicate potential for optimisation of CAPB feedstocks along with new and facile approaches to tuning the properties of mixed surfactant systems, using carefully selected tailgroup mixtures.
KW - Betaines
KW - Formulations
KW - Small-angle neutron scattering
KW - Surfactants
KW - Tensiometry
UR - http://www.scopus.com/inward/record.url?scp=85141486302&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2022.130435
DO - 10.1016/j.colsurfa.2022.130435
M3 - Article
AN - SCOPUS:85141486302
SN - 0927-7757
VL - 656
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - Part B
M1 - 130435
ER -