pH-responsive water-in-water Pickering emulsions

Langmuir : the ACS Journal of Surfaces and Colloids
Bach T NguyenTaco Nicolai

Abstract

The structure and stability of water-in-water emulsions was investigated in the presence of spherical, pH-sensitive microgels. The emulsions were formed by mixing aqueous solutions of dextran and PEO. The microgels consisted of cross-linked, synthetic polymers with a radius that steeply increased from 60 to 220 nm with increasing pH within a narrow range around 7.0. At all pH values between 5.0 and 7.5, the microgels were preferentially situated at the interface, but only in a narrow range between pH 7.0 and 7.5, the emulsions were stable for at least 1 week. The droplet size was visualized with confocal laser scanning microscopy and was found to be smallest in the stable pH range. Emulsions could be stabilized or destabilized by small changes of the pH. Addition of small amounts of salt led to a shift of the pH range where the emulsions were stable. The effects of varying the microgel concentration and the polymer composition were investigated.

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Citations

Jan 13, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Rilton Alves de FreitasLazhar Benyahia
Jul 4, 2015·Angewandte Chemie·Sarah M BrosnanMarkus Antonietti
Jun 24, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Alberto Gonzalez-JordanLazhar Benyahia
Aug 2, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Jianzhong JiangBernard P Binks
Sep 14, 2017·Angewandte Chemie·Jean-Paul DouliezLaure Beven
May 16, 2019·Chembiochem : a European Journal of Chemical Biology·Jean-Paul DouliezLaure Béven
Nov 22, 2019·Chemical Society Reviews·Youchuang Chao, Ho Cheung Shum
Sep 1, 2015·Physical Review Letters·Mark VisR Hans Tromp
Jul 16, 2020·Chembiochem : a European Journal of Chemical Biology·Hiroki SakutaKenichi Yoshikawa
May 21, 2020·Chemical Communications : Chem Comm·Marko PavlovicBernhard V K J Schmidt
Aug 5, 2018·Journal of Colloid and Interface Science·Christopher Griffith, Hugh Daigle
Dec 29, 2020·Advances in Colloid and Interface Science·Iván Navarro ArrebolaGarbine Aguirre
May 14, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Itaru Asano, Takahiro Sato
Feb 1, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Yongkui ChenJianji Wang
Nov 1, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Danae Gonzalez OrtizPhilippe Miele
Jun 14, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Lingsam TeaFrederic Renou
Mar 9, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Bernard P Binks, Hui Shi
Jul 13, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Kate L ThompsonSteven P Armes
May 10, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Bernard P Binks
Jul 11, 2020·The Journal of Physical Chemistry. B·Marco SchnurbusBjörn Braunschweig
Sep 7, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Hela KhemissiTaco Nicolai
Jun 30, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Takahiro OhYoshiko Miura

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