Temperature/pH dual-responsive reversible morphology evolution of block copolymer microparticles under three-dimensional confinement

作     者：Mengmeng Zhang Zaiyan Hou Simeng Liu Guoqiang Han Meirong Tian Jintao Zhu Jiangping Xu Mengmeng Zhang;Zaiyan Hou;Simeng Liu;Guoqiang Han;Meirong Tian;Jintao Zhu;Jiangping Xu

作者机构：Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2023年第66卷第12期

页      面：3587-3593页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China (52222304,52293474,51933005,51903098) the Open Research Fund of State Key Laboratory of Polymer Physics and Chemistry (2021–13) Changchun Institute of Applied Chemistry,Chinese Academy of Sciences the Analytical&Testing Center (HUST)and the Research Core Facilities of Life Science (HUST)for their support on TEM,H NMR,and FT-IR 

主　　题：block copolymer self-assembly stimuli-responsiveness lower critical solution temperature microparticle 

摘      要：Development of block copolymer(BCP)microparticles with switchable morphology in response to external stimuli is important for exploiting new intelligent *** this work,thermo/p H dual-responsive nanoparticles(NPs)were employed as a cosurfactant to modulate the self-assembly morphology of polystyrene-b-poly(2-vinylpyridine)(PS-b-P2VP)microparticles within confined emulsion *** co-surfactant was synthesized by grafting poly(acrylic acid)-b-poly(N-isopropylacrylamide)onto the surface of *** introduction of the dual-responsive co-surfactant enabled thermo/p H dual-responsive reversible morphology transition of the PS-b-P2VP microparticles by tailoring the hydrophobicity and interfacial affinity of the *** using this strategy,the thermo-inert PS-b-P2VP self-assembled into pupa-like microparticles at T=10℃ and p H7.5,which could transform into tulip-like microparticles when T was increased to 50℃.When the p H value was increased to 11,the pupa-like particles turned into onion-like microparticles although the PS-b-P2VP was inert to ***,the pupa-like microparticles remained unchanged when both T and p H were simultaneously *** PAA-b-PNIPAM-grafted Fe3O4NP surfactants showed obvious advantages over the linear PAA-b-PNIPAM surfactants in modulating the morphology transition,since the linear PAA-b-PNIPAM could not induce the reversible shape transition of *** work provides an efficient strategy to achieve reversible shape transformation of BCP microparticles while the internal phase structure is preserved,which may be utilized to switch the structural color properties of BCP microparticles.