Abstract
The conformation and the dilatational properties of three non-ionic triblock PEO-PPO-PEO (where PEO is polyethyleneoxide and PPO is polypropyleneoxide) copolymers of different hydrophobicity and molecular weight were investigated at the water-hexane interface. The interfacial behavior of the copolymers was studied by combining dilatational rheology using the oscillating drop method and ellipsometry. From the dilatational rheology measurements the limiting elasticity values, E(0), of the Pluronics as function of surface pressure, Π, and adsorption time were obtained, i.e. E(0)(t) and E(0)(Π). Here, it is shown that E(0)(t) depends on the number of PEO units and on the bulk concentration, showing maximum and minimum surface elasticity values which indicate conformational changes in the interfacial layer. Furthermore, in the framework of the polymer scaling law theory, conformational transitions were discussed in E(0) vs. Π plots. In a dilute regime (Π<14 mN m(-1)) at the water-hexane interface, E(0)=2Π fits well all the data, which indicates a two-dimensional "stretched chain" conformation. Increasing Π, two other interfacial transitions could take place. The different behavior of Pluronic copolymers could be also described by th...Continue Reading
References
May 26, 1999·Journal of Colloid and Interface Science·V Aguié-BéghinR Douillard
Mar 19, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Arayik HambardzumyanRoger Douillard
Jun 29, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·B Rippner BlomqvistP M Claesson
Mar 8, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·B A NoskovR Miller
Nov 30, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Finn Knut Hansen
Mar 25, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Daniela GeorgievaDominique Langevin
Dec 17, 2009·The European Physical Journal. E, Soft Matter·A Stocco, K Tauer
Feb 12, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Damien L BerthierSébastien Lecommandoux
Feb 13, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Zhifeng Bai, Timothy P Lodge
May 4, 2010·Colloids and Surfaces. B, Biointerfaces·Lorena TavanoNevio Picci
May 28, 2011·Advances in Colloid and Interface Science·G GotchevD Exerowa
Citations
Feb 3, 2016·Advances in Colloid and Interface Science·Tatyana F Svitova, Meng C Lin
Jun 29, 2013·Colloids and Surfaces. B, Biointerfaces·Luis M Pérez-MosquedaJosé Muñoz
Aug 19, 2014·Colloids and Surfaces. B, Biointerfaces·Luis Alfonso Trujillo-CayadoJosé Muñoz
Nov 26, 2013·Advances in Colloid and Interface Science·Amelia Torcello-GómezJulia Maldonado-Valderrama
Sep 8, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Houjian GongXin Lv
Jan 10, 2019·Soft Matter·Ce WangBaocai Xu
Jul 23, 2019·Soft Matter·C TrégouëtC Monteux
Sep 6, 2018·The European Physical Journal. E, Soft Matter·C TrégouëtC Monteux
May 17, 2016·Polymers·Yue Zheng, Ian W Wyman
Feb 19, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Alexandre PoirierAmélie Banc
Nov 14, 2013·The Journal of Physical Chemistry. B·Susruta SamantaDanilo Roccatano
Dec 21, 2019·ACS Omega·Zhongwei LiYebang Tan
Nov 1, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Afroditi Maria Zaki, Paola Carbone
Jun 3, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Michael L DavidsonLynn M Walker