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SCI Article

Magnetic-Patchy Janus Colloid Surfactants for Reversible Recovery of Pickering Emulsions

	성명	김진웅 ()
	소속	대학원 바이오나노학과
	캠퍼스
	우수선정주	2018년 02월 1째주

Author

Kim, Hyeri (Dept Bionano Technol); Cho, Jangwoo (Dept Bionano Technol); Cho, Jaehong (Dept Bionano Technol); 김진웅 (Dept Bionano Technol) corresponding author; Kim, Jin Woong (Dept Chem & Mol Engn);

Corresponding Author Info

Kim, JW (reprint author), Hanyang Univ, Dept Bionano Technol, Ansan 15588, South Korea.; Kim, JW (reprint author), Hanyang Univ, Dept Chem & Mol Engn, Ansan 15588, South Korea.; Park, BJ (reprint author), Kyung Hee Univ, Dept Chem Engn, Yongin 17104, Sout

E-mail

kjwoong@hanyang.ac.kr

Document Type

Article

Source

ACS APPLIED MATERIALS & INTERFACES Volume:10 Issue:1 Pages:1408-1414 Published:2018

Times Cited

External Information

http://dx.doi.org/10.1021/acsami.7b15894

Abstract

We present a straightforward and robust method for the synthesis of Janus colloid surfactants with distinct amphiphilicity and magnetic responsiveness. To this end, hydroxyl-functionalized amphiphilic Janus microparticles (JMPs) are synthesized by seeded monomer swelling and subsequent photopolymerization. By incorporating controlled amounts of hydroxyl groups on poly(styrene-co-vinyl alcohol) seed particles, we adjust the interfacial tension between the seed polymer and the poly(tetradecyl acrylate) secondary polymer (753). From theoretical and experimental observations, we verify that when gamma(13) is tuned to similar to 8.5 mN/m in a medium with controlled solvency, which corresponds to a 0.6 volume fraction of ethanol in water, the particles bicompartmentalize to form oval or ellipsoidal JMPs with controllable bulb dimensions. We also show that bulb site -specific patching of magnetic nanoparticles (NPs) can be achieved using the electrostatic interaction between the polyethylenimine-coated bulb surface and the polyvinylpyrrolidone-stabilized Fe2O3 NPs. Finally, we demonstrate that our magnetic-patchy JMPs can assemble at the oil water interface, enabling magnetic-responsive reversible recovery of Pickering emulsions.

Web of Science Categories

Nanoscience & Nanotechnology; Materials Science, Multidisciplinary

Funding

National Research Foundation of Korea (NRF) - Korea Government (MSIP) [2008-0061891, 2016R1A2B2016148]; Kyung Hee University [KHU-20141582]

Language

English

attached file