Direct evidence of entropy driven fluid-like - glass-like transition in microgel suspensions

被引：2
作者：
Guo, Yun Xia [1 ,2 ]
Liu, Ying Dan [1 ,2 ]
Liu, Riping [1 ,2 ]
Tian, Yongjun [1 ,2 ]
Chen, Ke [3 ,4 ]
Wang, Li-Min [1 ,2 ]
机构：
[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China
[2] Yanshan Univ, Coll Mat Sci & Engn, Qinhuangdao 066004, Hebei, Peoples R China
[3] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[4] Chinese Acad Sci, Inst Phys, Key Lab Soft Matter Phys, Beijing 100190, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2017年 / 110卷 / 07期
基金：
中国国家自然科学基金;
关键词：
GLASSFORMING LIQUIDS; PHASE-BEHAVIOR; SOFT COLLOIDS; RELAXATION; POLY(N-ISOPROPYLACRYLAMIDE); RHEOLOGY; DEPENDENCE; HYDRATION; DYNAMICS;
D O I：
10.1063/1.4976507
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The phase transitions in poly (N-isopropylacrylamide) (PNIPAM) microgel suspensions are studied using rheological and calorimetric measurements at various concentrations. Two transitions are resolved, one being the hydrophilic-hydrophobic transition imposed by the gain/release of H2O molecules in PNIPAM particles via H-bond interactions, the other the fluid-like - glass-like transition of the hydrated microgels. The relaxation behaviors in the frozen glass-like states are observed by monitoring the shear modulus upon aging. Nevertheless, no enthalpic signature is detected in the relaxation process, suggesting entropy-driven relaxation dynamics. Published by AIP Publishing.
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页数：4
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共 39 条
[1]   Relaxation in glassforming liquids and amorphous solids [J].
Angell, CA ;
Ngai, KL ;
McKenna, GB ;
McMillan, PF ;
Martin, SW .
JOURNAL OF APPLIED PHYSICS, 2000, 88 (06) :3113-3157
[2]   Rheology of soft colloids across the onset of rigidity: scaling behavior, thermal, and non-thermal responses [J].
Basu, Anindita ;
Xu, Ye ;
Still, Tim ;
Arratia, P. E. ;
Zhang, Zexin ;
Nordstrom, K. N. ;
Rieser, Jennifer M. ;
Gollub, J. P. ;
Durian, D. J. ;
Yodh, A. G. .
SOFT MATTER, 2014, 10 (17) :3027-3035
[3]   Theoretical perspective on the glass transition and amorphous materials [J].
Berthier, Ludovic ;
Biroli, Giulio .
REVIEWS OF MODERN PHYSICS, 2011, 83 (02) :587-645
[4]   Shear thickening in concentrated suspensions: phenomenology, mechanisms and relations to jamming [J].
Brown, Eric ;
Jaeger, Heinrich M. .
REPORTS ON PROGRESS IN PHYSICS, 2014, 77 (04)
[5]   Interfacial layers of stimuli-responsive poly-(N-isopropylacrylamide-co-methacrylicacid) (PNIPAM-co-MAA) microgels characterized by interfacial rheology and compression isotherms [J].
Brugger, Bastian ;
Vermant, Jan ;
Richtering, Walter .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2010, 12 (43) :14573-14578
[6]   Jamming and unjamming of concentrated colloidal dispersions in channel flows [J].
Campbell, Andrew I. ;
Haw, Mark D. .
SOFT MATTER, 2010, 6 (19) :4688-4693
[7]   Macroporous Polystyrene Resins as Adsorbents for the Removal of Tetracycline Antibiotics from an Aquatic Environment [J].
Chao, Yanhong ;
Zhu, Wenshuai ;
Yan, Bin ;
Lin, Yaobao ;
Xun, Suhang ;
Ji, Haiyan ;
Wu, Xiangyang ;
Li, Huaming ;
Han, Changri .
JOURNAL OF APPLIED POLYMER SCIENCE, 2014, 131 (15)
[8]   Dependence of calorimetric glass transition profiles on relaxation dynamics in non-polymeric glass formers [J].
Chen, Zeming ;
Zhao, Linran ;
Tu, Wenkang ;
Li, Zijing ;
Gao, Yanqin ;
Wang, Li-Min .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2016, 433 :20-27
[9]   Magnetorheology of Core-Shell Structured Carbonyl Iron/Polystyrene Foam Microparticles Suspension with Enhanced Stability [J].
Chuah, Wei Huan ;
Zhang, Wen Ling ;
Choi, Hyoung Jin ;
Seo, Yongsok .
MACROMOLECULES, 2015, 48 (19) :7311-7319
[10]   Spatially heterogeneous dynamics in a thermosensitive soft suspension before and after the glass transition [J].
Colin, Remy ;
Alsayed, Ahmed M. ;
Castaing, Jean-Christophe ;
Goyal, Rajesh ;
Hough, Larry ;
Abou, Berengere .
SOFT MATTER, 2011, 7 (09) :4504-4514
1234