The present paper reviews the most recent knowledge on water-in-water (W/W) emulsions formed in aqueous two-phase systems based on incompatibility between two polymers. The interfaces of these systems are ill-defined, relatively thick, and interfacial tensions are extremely low. Consequently, small molecules do not adsorb in W/W interfaces and emulsions are inherently unstable and the main challenge is achieving a proper colloidal stability at long times. The most widely used strategy is the addition of particles and/or macromolecules able to adsorb at the W/W interfaces, but often the stability of these emulsions is still not satisfactory in the long term. More recently, stabilization of W/W emulsions has been improved by ionic complexation and/or autoaggregation, forming membranes at the interfaces. The proper colloidal stabilization of W/W is paving the way for novel applications, such as carriers of living cells or the development of new 3D cell cultures and cell organoids.
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Qingdao Univ, Coll Mat Sci & Engn, Inst Biomed Mat & Engn, Qingdao 266071, Peoples R ChinaQingdao Univ, Coll Mat Sci & Engn, Inst Biomed Mat & Engn, Qingdao 266071, Peoples R China
Zhang, Xiaoyan
Cong, Hailin
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Qingdao Univ, Coll Mat Sci & Engn, Inst Biomed Mat & Engn, Qingdao 266071, Peoples R China
Qingdao Univ, Coll Chem & Chem Engn, Growing Base State Key Lab, Lab New Fiber Mat & Modern Text, Qingdao 266071, Peoples R ChinaQingdao Univ, Coll Mat Sci & Engn, Inst Biomed Mat & Engn, Qingdao 266071, Peoples R China
Cong, Hailin
Yu, Bing
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Qingdao Univ, Coll Mat Sci & Engn, Inst Biomed Mat & Engn, Qingdao 266071, Peoples R China
Qingdao Univ, Coll Chem & Chem Engn, Growing Base State Key Lab, Lab New Fiber Mat & Modern Text, Qingdao 266071, Peoples R ChinaQingdao Univ, Coll Mat Sci & Engn, Inst Biomed Mat & Engn, Qingdao 266071, Peoples R China
Yu, Bing
Chen, Qun
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Qingdao Univ, Coll Mat Sci & Engn, Inst Biomed Mat & Engn, Qingdao 266071, Peoples R ChinaQingdao Univ, Coll Mat Sci & Engn, Inst Biomed Mat & Engn, Qingdao 266071, Peoples R China
机构:
Abbott Labs, Dept R43D, Abbott Pk, IL 60064 USAAbbott Labs, Dept R43D, Abbott Pk, IL 60064 USA
Shi, Yi
Porter, William
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机构:Abbott Labs, Dept R43D, Abbott Pk, IL 60064 USA
Porter, William
Merdan, Thomas
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Abbott GmbH & Co KG, Global Pharmaceut, Res & Dev, SOLIQS,Sci Project Management, D-67061 Ludwigshafen, GermanyAbbott Labs, Dept R43D, Abbott Pk, IL 60064 USA
Merdan, Thomas
Li, Luk Chiu
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Abbott Labs, Dept AH71, Abbott Anim Hlth, Abbott Pk, IL 60064 USAAbbott Labs, Dept R43D, Abbott Pk, IL 60064 USA